One-way exhaust valve, bin cover, bean bin and coffee machine

Abstract

The utility model discloses a one-way exhaust valve, a bin cover, a bean bin and a coffee machine, and relates to the technical field of one-way exhaust valves.The one-way exhaust valve comprises a one-way valve and a waterproof breathable film, the one-way valve is provided with an air passing channel, a first opening and a second opening, the first opening and the second opening are communicated with the air passing channel, and the first opening is used for being communicated with external space; the one-way valve can limit gas from flowing from the first opening to the second opening; the waterproof breathable film comprises a first film, and the first opening is covered with the first film in a sealed mode. According to the technical scheme provided by the utility model, a means which is lower in cost and simpler in structure and has a certain fresh-keeping effect can be provided for the bean bin.

Description

Technical Field

[0001] This utility model relates to the field of one-way exhaust valve technology, and in particular to a one-way exhaust valve, a container cover, a bean hopper, and a coffee machine. Background Technology

[0002] Current coffee machines and grinders often have poorly sealed bean hoppers, allowing coffee beans to easily come into prolonged contact with oxygen and moisture in the air. This leads to oxidation, rancidity, and oil separation, resulting in poor flavor when brewed from these deteriorated beans. Therefore, some coffee machines on the market incorporate vacuum systems to evacuate the internal space of the bean hopper, thus preserving the coffee beans and extending their shelf life while maintaining optimal flavor.

[0003] However, there are obvious drawbacks to using vacuum devices to preserve coffee beans, including increased equipment costs, more complex equipment structures leading to lower production efficiency, and high requirements for the airtightness of the bean hopper during vacuuming. The bean hopper needs to be opened and closed when adding coffee beans, and if coffee powder or silver foil sticks to the opening and closing points of the bean hopper, the vacuuming function can easily fail, causing the coffee beans in the bean hopper to lose their preservation effect.

[0004] Therefore, how to achieve a soybean bin with lower cost, simpler structure, and certain preservation effect has become a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The main purpose of this invention is to provide a one-way exhaust valve, a lid, a bean hopper, and a coffee machine, aiming to provide a lower-cost, simpler-structured means of preserving bean hoppers with a certain degree of freshness preservation.

[0006] To achieve the above objectives, the one-way exhaust valve proposed in this utility model includes:

[0007] A one-way valve has an air passage, a first opening and a second opening communicating with the air passage, the first opening being used to communicate with an external space, and the one-way valve being able to restrict the flow of gas from the first opening to the second opening.

[0008] A waterproof and breathable membrane includes a first membrane sheet that covers the first opening.

[0009] In one embodiment, the waterproof and breathable membrane further includes a second membrane sheet that covers the second opening.

[0010] In one embodiment, the one-way valve includes a valve seat and a movable valve plate. The valve seat forms the gas passage, which includes a movable cavity communicating with the second opening. The movable valve plate is movably disposed in the movable cavity to movably seal the second opening. Gas flowing into the gas passage from the second opening can actuate the movable valve plate to disengage it from the second opening.

[0011] In one embodiment, the valve seat includes a housing and a valve body. The housing is provided with a mounting groove, and the valve body is disposed in the mounting groove and together with the groove wall of the mounting groove, defines the air passage. The first opening includes the gap between the groove edge of the mounting groove and the valve body.

[0012] In one embodiment, the first diaphragm covers the opening of the mounting groove, and the periphery of the first diaphragm is connected to the edge of the opening of the mounting groove.

[0013] In one embodiment, the valve body includes a main plate portion and a surrounding plate portion surrounding the periphery of the main plate portion. The surrounding plate portion extends in a direction away from the first opening. The bottom of the mounting groove is provided with a mounting boss facing the valve body. The mounting boss is located on the inner periphery of the surrounding plate portion and is provided with the second opening. The end face of the mounting boss and the main plate portion are spaced apart to form the movable cavity.

[0014] In one embodiment, the enclosure portion is radially spaced from the sidewall of the mounting groove and is mounted on the mounting boss via a snap-fit ​​structure.

[0015] In one embodiment, the main board portion has a connecting hole corresponding to the movable valve plate, the connecting hole connecting the movable cavity and the slot of the mounting groove.

[0016] In one embodiment, the movable valve plate is made of silicone.

[0017] In one embodiment, the periphery of the movable valve plate abuts against the periphery of the second opening, and a sealing grease is provided at the abutment.

[0018] This utility model also proposes a storage cover for use in a storage compartment, the storage compartment comprising a compartment body having a compartment opening, the storage cover being disposed over the compartment opening of the compartment body, the storage cover comprising:

[0019] Cover plate; and

[0020] The aforementioned one-way exhaust valve is located on the cover plate.

[0021] In one embodiment, the cover further includes a mounting element, through which the one-way exhaust valve is detachably mounted on the cover.

[0022] In one embodiment, the mounting component includes a fastener and a first sealing element, wherein the one-way exhaust valve is sealed to the fastener via the first sealing element, and the fastener is connected to the cover plate.

[0023] In one embodiment, the first sealing member is provided with a receiving groove, the opening of the receiving groove being disposed away from the second opening, the one-way exhaust valve being disposed in the receiving groove, the fastener including a sealing plate and a snap-fit ​​protrusion disposed on the sealing plate, the end of the snap-fit ​​protrusion away from the sealing plate being snapped with the cover plate, the sealing plate covering the opening of the receiving groove and having an air hole corresponding to the first opening; the edge of the opening of the receiving groove abuts against the sealing plate.

[0024] In one embodiment, the sidewall of the receiving groove is provided with a groove corresponding to the snap-fit ​​protrusion, the root of the snap-fit ​​protrusion is embedded in the groove, and the sidewall of the receiving groove is sandwiched between the outer side of the one-way exhaust valve and the side of the snap-fit ​​protrusion.

[0025] In one embodiment, the cover further includes a second sealing element, the edge of the sealing plate being sealed to the cover plate via the second sealing element.

[0026] In one embodiment, the diameter of the pores ranges from 1 mm to 3 mm.

[0027] In one embodiment, the outer surface of the cover plate is recessed inward to form a receiving groove, the first sealing member and the one-way exhaust valve are received in the receiving groove, the sealing plate is disposed at the opening of the receiving groove, and the snap-fit ​​protrusion snaps into the groove wall of the receiving groove.

[0028] In one embodiment, the bottom wall of the receiving groove abuts against the bottom surface of the receiving groove and has a supporting portion protruding towards the one-way exhaust valve. The supporting portion abuts against the end face of the one-way exhaust valve. The bottom wall of the receiving groove is provided with a first through hole, and the bottom wall of the receiving groove is provided with a second through hole corresponding to the first through hole. The first through hole is connected to the second opening of the one-way exhaust valve through the second through hole.

[0029] In one embodiment, the sidewall of the receiving groove is provided with a snap-fit ​​notch, and the snap-fit ​​protrusion is engaged in the snap-fit ​​notch.

[0030] This utility model also proposes a bean hopper, including a hopper body and the aforementioned hopper cover. The hopper body has a storage space and a hopper opening communicating with the storage space. The hopper cover can be placed on the hopper opening, and the storage space can be used to store coffee beans.

[0031] In one embodiment, the opening pressure of the one-way exhaust valve ranges from 300 Pa to 800 Pa.

[0032] This utility model also proposes a coffee machine, including a coffee machine body and the aforementioned bean hopper.

[0033] This invention addresses two main issues. First, by installing a one-way exhaust valve in the bean hopper, it prevents outside air from entering. Simultaneously, by utilizing the continuous carbon dioxide release from coffee beans, it creates a lower-oxygen and drier environment within the hopper, reducing the risk of oxidation, rancidity, and oil separation—essentially achieving a certain degree of preservation. Second, by incorporating a waterproof and breathable membrane at the first opening of the one-way exhaust valve, it further prevents moisture from the outside air from entering the hopper, making it easier to maintain a dry interior. Compared to existing methods that use vacuum devices for coffee bean preservation, this invention offers advantages such as simple structure, low production cost, simple processing technology, and wide applicability, while still achieving a certain level of preservation. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 A schematic diagram of a one-way exhaust valve embodiment provided by this utility model;

[0036] Figure 2 for Figure 1 Exploded view of the structure shown;

[0037] Figure 3 An exploded view of an embodiment of the bin cover provided by this utility model;

[0038] Figure 4 for Figure 3 A cross-sectional view of the structure shown.

[0039] Explanation of icon numbers:

[0040] 100. One-way exhaust valve; 101. One-way valve; 102. Air passage; 103. First opening; 104. Second opening; 105. Movable chamber; 106. Valve seat; 107. Movable valve plate; 110. Housing; 111. Mounting groove; 112. Mounting boss; 120. Valve body; 121. Main plate; 122. Enclosure plate; 123. Connecting hole; 191. First diaphragm; 192. Second diaphragm;

[0041] 200, Container cover; 210, Cover plate; 212, Receiving groove; 213, First through hole; 214, Snap-fit ​​notch; 220, Fastener; 221, Sealing plate; 222, Snap-fit ​​protrusion; 223, Vent; 230, First seal; 231, Receiving groove; 232, Support; 233, Second through hole; 234, Insert groove; 240, Second seal.

[0042] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0044] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0045] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0046] Current coffee machines and grinders often have poorly sealed bean hoppers, allowing coffee beans to easily come into prolonged contact with oxygen and moisture in the air. This leads to oxidation, rancidity, and oil separation, resulting in poor flavor when brewed from these deteriorated beans. Therefore, some coffee machines on the market incorporate vacuum systems to evacuate the internal space of the bean hopper, thus preserving the coffee beans and extending their shelf life while maintaining optimal flavor.

[0047] However, there are obvious drawbacks to using vacuum devices to preserve coffee beans, including increased equipment costs, more complex equipment structures leading to lower production efficiency, and high requirements for the airtightness of the bean hopper during vacuuming. The bean hopper needs to be opened and closed when adding coffee beans, and if coffee powder or silver foil sticks to the opening and closing points of the bean hopper, the vacuuming function can easily fail, causing the coffee beans in the bean hopper to lose their preservation effect.

[0048] Therefore, how to achieve a soybean bin with lower cost, simpler structure, and certain preservation effect has become a problem that urgently needs to be solved by those skilled in the art.

[0049] In view of this, the present invention proposes a one-way exhaust valve, and a hopper cover and a bean hopper having the one-way exhaust valve. When the one-way exhaust valve is applied to the bean hopper, it can keep the bean hopper fresh to a certain extent, and the structure is simple and the manufacturing cost is low.

[0050] It should be noted that the storage compartment used in the one-way exhaust valve of this utility model includes, but is not limited to, a bean hopper. That is, it is not limited to storing coffee beans, but can also be used to store food such as rice and soybeans, electronic devices such as cameras, or precision instruments such as mechanical watches. This application does not make specific limitations in this regard. For ease of writing and understanding of the solution, the following explanation will use a bean hopper as an example.

[0051] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the one-way exhaust valve 100 includes a one-way valve 101 and a waterproof and breathable membrane. The one-way valve 101 has an air passage 102, a first opening 103 and a second opening 104 communicating with the air passage 102. The first opening 103 is used to communicate with an external space (e.g., the external space of a bean hopper). The one-way valve 101 can restrict the flow of gas from the first opening 103 to the second opening 104. The waterproof and breathable membrane includes a first membrane 191, which covers the first opening 103.

[0052] Specifically, roasted coffee beans continue to release gases, primarily carbon dioxide. This process, often referred to as the resting or degassing stage, lasts from a few days to several weeks. Utilizing this characteristic, when roasted coffee beans are stored in a hopper equipped with the one-way degassing valve 100 of this invention, the continuous release of carbon dioxide increases the internal pressure. When this pressure exceeds the degassing threshold of the one-way degassing valve 100, it opens, disengaging the second diaphragm 192 from the second opening 104 and connecting the second opening 104 to the air passage 102. This allows gases (especially oxygen and moisture) within the hopper to escape through the one-way degassing valve 100 to the first opening 103 and ultimately to the outside of the hopper. Simultaneously, outside air (especially oxygen and moisture) cannot enter the second opening 104 or the hopper through the one-way degassing valve 100, creating a lower-oxygen and drier environment within the hopper. This reduces the risk of oxidation, rancidity, and oil separation in the coffee beans.

[0053] Therefore, this utility model's technical solution, by installing a one-way exhaust valve 100 in the bean hopper, can prevent outside air from entering the hopper. Simultaneously, by utilizing the characteristic of coffee beans continuously releasing carbon dioxide, a lower oxygen and drier environment is created inside the hopper, thereby reducing the risk of quality deterioration such as oxidative rancidity and oil separation in the coffee beans. In other words, it achieves a certain degree of preservation effect for the coffee beans. Compared to existing solutions that use vacuum devices to preserve coffee beans, this utility model's technical solution, while achieving a certain preservation effect, has the advantages of simple structure, low production cost, simple processing technology, and wide applicability.

[0054] In theory, the bean hopper using the one-way exhaust valve 100 of this invention has a certain preservation effect on all types of coffee beans. Specifically, with the same quantity of coffee beans, the darker the roast level, the more carbon dioxide the beans release, and thus the better the preservation effect within the bean hopper equipped with the one-way exhaust valve 100. Similarly, for coffee beans of the same roast level, the more beans stored in the hopper, the more carbon dioxide the beans release, and thus the better the preservation effect within the hopper equipped with the one-way exhaust valve 100.

[0055] Specifically, optionally, the opening pressure of the one-way exhaust valve 100 ranges from 300 Pa to 800 Pa. For example, the opening pressure of the one-way exhaust valve 100 can be set to 400 Pa, 450 Pa, 500 Pa, 550 Pa, or 600 Pa. Generally speaking, the opening pressure of the one-way exhaust valve 100 refers to the minimum pressure difference that needs to be applied to the one-way exhaust valve 100 under normal operating conditions. When the pressure difference between the inside and outside of the chamber is greater than or equal to this minimum pressure difference, it will cause the movable valve plate 107 to be pushed open and disengage from the second opening 104 (e.g., Figure 1(as shown in the figure), thereby opening the second opening 104 and the air passage 102, and allowing the gas inside the chamber to flow from the second opening 104 to the first opening 103; when the pressure difference between the inside and outside of the chamber is less than the minimum pressure difference, the one-way exhaust valve 100 remains closed.

[0056] It is understandable that if the opening pressure is set too high, the required volume of carbon dioxide released by the coffee beans will be too large, meaning that a very large amount of carbon dioxide needs to be released for the one-way exhaust valve 100 to open. This is not conducive to the timely removal of air from the coffee beans. If the opening pressure is set too low, the one-way exhaust valve 100 will open too frequently, which may shorten its service life.

[0057] Generally speaking, as a component of a coffee machine, the bean hopper is typically required to have a lifespan no less than that of the coffee machine itself. In other words, the bean hopper is intended for long-term use, not as a disposable packaging bag or box. Therefore, regular washing and cleaning of the bean hopper is unavoidable during coffee machine use to maintain its cleanliness and hygiene. If water or other impurities accidentally enter the one-way exhaust valve 100 during cleaning (for example, through the first opening 103 into the air passage 102), it may prevent the one-way exhaust valve 100 from performing its one-way exhaust function properly, resulting in malfunction or even failure.

[0058] This invention addresses this issue by providing a waterproof and breathable membrane at the first opening 103 of the one-way exhaust valve 100. On one hand, this further prevents moisture from the outside air from entering the bean silo via the one-way exhaust valve 100, thus making it easier to keep the silo dry. On the other hand, it prevents water from entering the one-way exhaust valve 100 during tasks such as cleaning the silo, thereby avoiding malfunctions or even failures due to internal water ingress.

[0059] Please see Figure 1 and Figure 2Optionally, the waterproof and breathable membrane further includes a second membrane 192, which covers the second opening 104. That is, in this embodiment, waterproof and breathable membranes are provided in both the first opening 103 and the second opening 104. This not only further reduces the risk of moisture from outside air entering the bean hopper through the one-way exhaust valve 100, but also provides more comprehensive protection for the one-way exhaust valve 100, preventing water from entering the one-way exhaust valve 100 during water rinsing. It can be understood that when both openings of the one-way exhaust valve 100 (i.e., the first opening 103 and the second opening 104) are covered and protected by the waterproof and breathable membrane, the inner and outer sides of the bean hopper can be directly rinsed without water entering, thereby improving the convenience and hygiene of cleaning the bean hopper and enhancing the user experience. Of course, in other embodiments, the second membrane 192 may not be provided, and only the first membrane 191 may be provided in the first opening 103.

[0060] It is understandable that disposable packaging bags or boxes used to store coffee beans do not require rinsing or washing, therefore, a waterproof and breathable membrane is not necessary on the one-way exhaust valve 100. However, considering that the bean hopper is a long-term coffee machine accessory and requires cleaning, this invention specifically provides waterproof and breathable membranes on both the first opening 103 and the second opening 104 of the one-way exhaust valve 100. This allows the bean hopper to be thoroughly rinsed without the risk of water accidentally entering the one-way exhaust valve 100 during cleaning, thus improving the ease of cleaning the bean hopper.

[0061] Optionally, the waterproof and breathable membrane can be made of expanded polytetrafluoroethylene (e-PTFE membrane), or it can be made of polyester membrane, TPU membrane or polymer microporous membrane, etc. This application does not make specific limitations on this.

[0062] Please see Figure 1 and Figure 2Furthermore, the one-way valve 101 includes a valve seat 106 and a movable valve plate 107. The valve seat 106 forms the gas passage 102. The gas passage 102 includes a movable cavity 105 communicating with the second opening 104. The movable valve plate 107 is movably disposed in the movable cavity 105 to movably cover the second opening 104. Gas flowing into the gas passage 102 from the second opening 104 can actuate the movable valve plate 107 to disengage from the second opening 104. Specifically, when the pressure difference between the inside and outside of the soybean hopper exceeds the opening pressure of the one-way valve 101, the gas inside the hopper pushes up the movable valve plate 107, causing it to disengage from its original state of sealing the second opening 104. This opens the second opening 104 and the air passage 102, allowing the gas inside the hopper to flow sequentially through the second opening 104, the second diaphragm 192, the air passage 102, the first diaphragm 191, and the first opening 103 before exiting to the outside of the hopper. This design is simple and easy to implement.

[0063] It is understood that the structure of the one-way valve 101 is not limited to the above form, and can also be other forms, as long as it can achieve the limitation of one-way gas flow.

[0064] Please see Figure 1 and Figure 2 Furthermore, the valve seat 106 includes a housing 110 and a valve body 120. The housing 110 is provided with a mounting groove 111, and the valve body 120 is disposed within the mounting groove 111, together with the groove wall of the mounting groove 111 defining the air passage 102. The first opening 103 includes the gap between the groove edge of the mounting groove 111 and the valve body 120. Thus, the air passage 102 is enclosed by the housing 110 and the valve body 120, resulting in a simple and easy-to-implement structure. Furthermore, placing the valve body 120 within the mounting groove 111 allows for a more compact structure for the valve seat 106. Of course, in other embodiments, the valve seat 106 may be integrally formed with the air passage 102, or the housing 110 may not have a mounting groove 111.

[0065] Optionally, the first diaphragm 191 covers the opening of the mounting groove 111, and the periphery of the first diaphragm 191 is connected to the edge of the opening of the mounting groove 111. In this way, by completely sealing the opening of the mounting groove 111 with the second diaphragm 192, the airtightness of the one-way exhaust valve 100 can be improved, and the installation and fixation of the first diaphragm 191 on the valve seat 106 can be facilitated.

[0066] Optionally, the periphery of the first diaphragm 191 is welded and fixed to the edge of the mounting groove 111, wherein the welding method includes, but is not limited to, hot melt welding. This facilitates the installation and fixing of the first diaphragm 191, improves the installation reliability of the first diaphragm 191, and enhances the airtightness of the one-way exhaust valve 100. Of course, in other embodiments, the periphery of the first diaphragm 191 can also be bonded and fixed to the edge of the mounting groove 111.

[0067] Alternatively, the second diaphragm 192 can also be fixed by welding, for example, see [reference needed]. Figure 1 The periphery of the second diaphragm 192 is welded and fixed to the inner sidewall of the second opening 104. Of course, in other embodiments, the periphery of the second diaphragm 192 may also be bonded and fixed to the periphery of the second opening 104.

[0068] Please see Figure 1 and Figure 2 Furthermore, the valve body 120 includes a main plate portion 121 and a surrounding plate portion 122 surrounding the periphery of the main plate portion 121. The surrounding plate portion 122 extends in a direction away from the first opening 103. The bottom of the mounting groove 111 is provided with a mounting boss 112 protruding towards the valve body 120. The mounting boss 112 is located on the inner periphery of the surrounding plate portion 122 and is provided with the second opening 104. The end face of the mounting boss 112 and the main plate portion 121 are spaced apart to form the movable cavity 105. Specifically, when the movable valve plate 107 abuts against the end face of the mounting boss 112, it can seal the second opening 104. When the movable valve plate 107 is pushed away from the end face of the mounting boss 112 by the gas flowing in from the second opening 104, the movable valve plate 107 can be kept in a stable position by the abutment of the main plate portion 121, and the gas can continuously and effectively flow into the one-way exhaust valve 100 from the gap between the movable valve plate 107 and the mounting boss 112. In this way, the surrounding plate portion 122 can restrict the radial displacement of the movable valve plate 107, so that the movable valve plate 107 can reliably switch between the two states of covering and disengaging from the second opening 104 within the movable cavity 105.

[0069] Please see Figure 1 Optionally, the enclosure plate portion 122 is radially spaced from the groove sidewall of the mounting groove 111 and is mounted on the mounting boss 112 via a snap-fit ​​structure. It should be noted that a gap is also formed between the enclosure plate portion 122 and the peripheral sidewall of the mounting boss 112; this gap is part of the air passage 102. The radially spaced gap between the enclosure plate portion 122 and the groove sidewall of the mounting groove 111 is also part of the air passage 102, making the overall air passage 102 more tortuous.

[0070] Thus, the mounting boss 112 is located on the inner periphery of the surrounding plate portion 122 and connected to the surrounding plate portion 122, effectively positioning and installing the valve body 120 so that the valve body 120 can be stably installed in the mounting groove 111. Secondly, the surrounding plate portion 122 is detachably connected to the mounting boss 112 via a snap-fit ​​structure, which facilitates the disassembly and maintenance of the one-way exhaust valve 100. Of course, in other embodiments, the surrounding plate portion 122 can also be fixed to the mounting boss 112 by means of adhesive bonding or welding.

[0071] Please see Figure 1 and Figure 2 Optionally, the main board portion 121 is provided with a connecting hole 123 corresponding to the movable valve plate 107. The connecting hole 123 connects the movable cavity 105 and the slot of the mounting groove 111. Specifically, the connecting hole 123 can communicate with the external space through the slot of the mounting groove 111. When the one-way exhaust valve 100 is not open, external air can flow from the connecting hole 123 to the plate surface of the movable valve plate 107 away from the second opening 104, thereby allowing the movable valve plate 107 to better fit on the mounting boss 112, and thus more tightly seal the second opening 104. When the one-way exhaust valve 100 is open, the movable valve plate 107 abuts against the main board portion 121 and seals the connecting hole 123, so that the gas in the chamber cannot be discharged along the connecting hole 123, but can only flow to the first opening 103 along the predetermined air passage 102. Of course, in other embodiments, the connecting hole 123 may not be provided.

[0072] It is understood that in the embodiment where the first diaphragm 191 covers the opening of the mounting groove 111, the first diaphragm 191 also covers the connecting hole 123 to prevent water from outside the chamber from flowing into the interior of the one-way exhaust valve 100 through the connecting hole 123.

[0073] Optionally, the movable valve plate 107 is made of silicone. Thus, the silicone movable valve plate 107 not only has a long service life, but also, under atmospheric pressure outside the chamber, can better adhere to the mounting boss 112, thereby achieving a better sealing effect. Of course, in other embodiments, the movable valve plate 107 can also be made of other elastic materials, such as rubber, or metal or plastic.

[0074] To further improve the sealing effect between the movable valve plate 107 and the mounting boss 112, optionally, the periphery of the movable valve plate 107 abuts against the periphery of the second opening 104, and a sealing grease (not shown in the accompanying drawings) is provided at the abutment. Specifically, the sealing grease can be silicone oil or other grease products that can achieve a sealing effect; this application does not specifically limit this. Furthermore, the sealing grease can be applied to the movable valve plate 107, to the end face of the mounting boss 112, or both.

[0075] It is understood that the opening pressure of the one-way exhaust valve 100 is related not only to the structural parameters of the movable valve plate 107 (for example, the greater the weight of the movable valve plate 107, the greater the required opening pressure), but also to the performance parameters of the sealing grease (for example, the higher the viscosity of the sealing grease, the greater the required opening pressure). Those skilled in the art can design and select the structural parameters of the movable valve plate 107 and the performance parameters of the sealing grease according to design needs; this application does not impose specific limitations in this regard.

[0076] Please see Figure 3 and Figure 4 This utility model also proposes a storage cover 200 for use in a storage compartment. The storage compartment includes a compartment body with a compartment opening, and the storage cover 200 covers the compartment opening of the compartment body. The storage cover 200 includes a cover plate 210 and the aforementioned one-way exhaust valve 100. The specific structure of the one-way exhaust valve 100 is as described in the above embodiments. Since this storage cover 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The one-way exhaust valve 100 is located on the cover plate 210.

[0077] It should be noted that the storage compartment used in the cover 200 of this utility model is not limited to storing coffee beans. It can also be used to store food such as rice and soybeans, or to store electronic devices such as cameras, or to store precision instruments such as mechanical watches. This application does not make any specific limitations in this regard.

[0078] It is understandable that when the storage compartment does not contain substances that continuously release gas, such as when storing a camera, inert gas can be injected into the storage compartment to increase the air pressure inside, and then the air inside the compartment can be discharged to the outside through the one-way exhaust valve 100, thereby achieving the effect of preserving or protecting the contents of the compartment.

[0079] Furthermore, the compartment cover 200 also includes a mounting component, through which the one-way exhaust valve 100 is detachably mounted on the cover plate 210. Thus, the one-way exhaust valve 100 is indirectly mounted on the compartment cover 200 via the mounting component, which simplifies the structure of the one-way exhaust valve 100. Moreover, since the mounting component is detachable, it facilitates disassembly, maintenance, or replacement of the one-way exhaust valve 100. Of course, in other embodiments, the one-way exhaust valve 100 may be directly mounted on the compartment cover 200.

[0080] Please see Figure 3 and Figure 4Furthermore, the mounting component includes a fastener 220 and a first sealing element 230. The one-way exhaust valve 100 is sealed to the fastener 220 via the first sealing element 230, and the fastener 220 is connected to the cover plate 210. This improves the airtightness of the silo cover 200, preventing outside air and water from entering the silo through the gap between the one-way exhaust valve 100 and the fastener 220, thus better maintaining a dry and low-oxygen environment inside the soybean silo. Of course, in other embodiments, the first sealing element 230 may not be provided. For example, the one-way exhaust valve 100 can be glued to the fastener 220, achieving both fixing and sealing of the one-way exhaust valve 100.

[0081] It is understood that there are various ways to install the one-way exhaust valve 100 and the fastener 200; for example, please refer to [link / reference needed]. Figure 3 and Figure 4 In one embodiment, the first sealing member 230 is provided with a receiving groove 231, the opening of the receiving groove 231 being disposed away from the second opening 104. The one-way exhaust valve 100 is disposed within the receiving groove 231. The fastener 220 includes a sealing plate 221 and a snap-fit ​​protrusion 222 disposed on the sealing plate 221. The end of the snap-fit ​​protrusion 222 away from the sealing plate 221 is fastened to the cover plate 210. The sealing plate 221 covers the opening of the receiving groove 231 and is provided with an air hole 223 corresponding to the first opening 103. The edge of the opening of the receiving groove 231 abuts against the sealing plate 221. Thus, by enclosing the one-way exhaust valve 100 with the receiving groove 231, the one-way exhaust valve 100 can be protected, and the gap between the one-way exhaust valve and the fastener 220 and the cover plate 210 can be filled and sealed, thereby improving the airtightness of the cover 200. Of course, in other embodiments, the receiving groove 231 may not be provided, or the fastener 220 may be fastened to the cover plate 210 by screws.

[0082] Optionally, the diameter of the vent 223 is in the range of 1 mm to 3 mm. This prevents foreign objects such as dust particles and coffee bean fragments from entering and clogging the vent. Of course, in other embodiments, the diameter of the vent can also be in other ranges, such as 4 mm to 10 mm.

[0083] Please see Figure 3 and Figure 4Optionally, the sidewall of the receiving groove 231 is provided with a groove 234 corresponding to the snap-fit ​​protrusion 222. The root of the snap-fit ​​protrusion 222 is embedded in the groove 234, and the sidewall of the receiving groove 231 is sandwiched between the outer side of the one-way exhaust valve 100 and the side of the snap-fit ​​protrusion 222. Specifically, each side of the sealing plate 221 is provided with a snap-fit ​​protrusion 222. The two snap-fit ​​protrusions 222 together clamp the first sealing element 230, thereby allowing the one-way exhaust valve 100, the first sealing element 230 and the fastener 220 to be assembled into a module first, and then the module is installed on the cover plate 210, which is beneficial to improving the assembly convenience of the cover 200. In this way, the first sealing element 230 can both seal the mating gap between the one-way exhaust valve 100 and the fastener 220 and realize the installation and fixation of the one-way exhaust valve 100. The structure is simple and easy to implement. Of course, in other embodiments, the groove may not be provided.

[0084] Please see Figure 3 and Figure 4 To further improve the airtightness of the silo cover 200, optionally, the silo cover 200 also includes a second sealing element 240, the edge of the sealing plate 221 being sealed to the cover plate 210 via the second sealing element 240. Thus, the fastener 220 is snapped and fixed to the cover plate 210, facilitating the installation and removal of the one-way exhaust valve 100. Furthermore, the fit gap between the fastener 220 and the cover plate 210 may be relatively large. By providing the second sealing element 240, the problem of outside air and water entering the silo through the fit gap between the fastener 220 and the cover plate 210 can be prevented, thereby allowing the inside of the soybean silo to better maintain a dry and low-oxygen environment.

[0085] It is understood that there are various ways in which the one-way exhaust valve 100 can be installed on the cover plate 210, for example, please refer to Figure 3 and Figure 4 In one embodiment, the outer surface of the cover plate 210 is recessed inward with a receiving groove 212, the first sealing member 230 and the one-way exhaust valve 100 are received in the receiving groove 212, the sealing plate 221 is disposed at the opening of the receiving groove 212, and the engaging protrusion 222 engages with the groove wall of the receiving groove 212. Thus, by receiving the one-way exhaust valve 100 in the receiving groove 212, both the one-way exhaust valve 100 is protected, and the problem of a high protrusion structure on the outer surface of the hopper cover 200 is avoided, facilitating the installation and storage of the bean hopper. Of course, in other embodiments, the receiving groove may not be provided; the cover plate may have mounting holes or mounting notches, and the one-way exhaust valve may be mounted on the mounting holes or mounting notches via mounting parts.

[0086] Please see Figure 3 and Figure 4Optionally, the receiving groove 212 has a snap-fit ​​notch 214 on its sidewall, and the snap-fit ​​protrusion 222 is engaged with the snap-fit ​​notch 214. This results in a simple and easy-to-implement structure. Alternatively, in other embodiments, the receiving groove 212 may have a snap-fit ​​protrusion on its sidewall, allowing the snap-fit ​​protrusion to engage securely with the snap-fit ​​protrusion.

[0087] Please see Figure 3 and Figure 4 Optionally, the bottom wall of the receiving groove 231 abuts against the bottom surface of the receiving groove 212, and a support portion 232 protrudes towards the one-way exhaust valve 100. The support portion 232 abuts against the end face of the one-way exhaust valve 100. The bottom wall of the receiving groove 212 is provided with a first through hole 213, and the bottom wall of the receiving groove 231 is provided with a second through hole 233 corresponding to the first through hole 213. The first through hole 213 communicates with the second opening 104 of the one-way exhaust valve 100 through the second through hole 233. In this way, the support portion 232 provides support and fixation for the one-way exhaust valve 100, making the installation of the one-way exhaust valve 100 on the cover plate 210 more stable and reliable. Furthermore, by providing the first through hole 213 and the second through hole 233, the gas in the chamber can flow more directly and smoothly to the second opening 104 of the one-way exhaust valve 100. Of course, in other embodiments, the first seal 230 may not have a support portion 232.

[0088] This utility model also proposes a bean hopper, including a hopper body and the aforementioned hopper cover. The hopper cover includes a cover plate and the aforementioned one-way exhaust valve. The specific structure of the one-way exhaust valve is as described in the above embodiments. Since this hopper cover adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0089] The hopper body has a storage space and an opening connecting to the storage space. The hopper lid can be placed on the opening, and the storage space can be used to store coffee beans. Of course, in other embodiments, the one-way vent valve can be located on the hopper body instead of on the lid.

[0090] Optionally, when the one-way vent valve is applied to the cover of the coffee bean hopper, the opening pressure of the one-way vent valve ranges from 300 Pa to 800 Pa. For example, the opening pressure of the one-way vent valve can be set to 400 Pa, 450 Pa, 500 Pa, 550 Pa, or 600 Pa. It is understood that if the opening pressure is set too high, the required volume of carbon dioxide released by the coffee beans is too high; that is, a very large amount of carbon dioxide needs to be released by the coffee beans to open the one-way vent valve, which is not conducive to the timely removal of air from the coffee beans. If the opening pressure is set too low, the one-way vent valve will open too frequently, which may shorten its service life.

[0091] This utility model also proposes a coffee machine, including a coffee machine body and the aforementioned bean hopper. The specific structure of the one-way exhaust valve of the bean hopper is as described in the above embodiments. Since the hopper cover adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0092] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A one-way exhaust valve, characterized in that, The one-way exhaust valve includes: A one-way valve has an air passage, a first opening and a second opening communicating with the air passage, the first opening being used to communicate with an external space, and the one-way valve being able to restrict the flow of gas from the first opening to the second opening. A waterproof and breathable membrane includes a first membrane sheet that covers the first opening.

2. The one-way exhaust valve as described in claim 1, characterized in that, The waterproof and breathable membrane also includes a second membrane sheet, which covers the second opening.

3. The one-way exhaust valve as described in claim 2, characterized in that, The one-way valve includes a valve seat and a movable valve plate. The valve seat forms the gas passage, which includes a movable cavity communicating with the second opening. The movable valve plate is movably disposed in the movable cavity to movably seal the second opening. Gas flowing into the gas passage from the second opening can actuate the movable valve plate to disengage it from the second opening.

4. The one-way exhaust valve as described in claim 3, characterized in that, The valve seat includes a housing and a valve body. The housing is provided with a mounting groove, and the valve body is disposed in the mounting groove and together with the groove wall of the mounting groove, defines the air passage. The first opening includes the gap between the groove edge of the mounting groove and the valve body.

5. The one-way exhaust valve as described in claim 4, characterized in that, The first diaphragm covers the opening of the mounting groove, and the periphery of the first diaphragm is connected to the edge of the opening of the mounting groove.

6. The one-way exhaust valve as described in claim 4, characterized in that, The valve body includes a main plate portion and a surrounding plate portion surrounding the periphery of the main plate portion. The surrounding plate portion extends in a direction away from the first opening. The bottom of the mounting groove is provided with a mounting boss facing the valve body. The mounting boss is located on the inner periphery of the surrounding plate portion and is provided with the second opening. The end face of the mounting boss and the main plate portion are spaced apart to form the movable cavity.

7. The one-way exhaust valve as described in claim 6, characterized in that, The enclosure portion and the sidewall of the mounting groove are radially spaced apart and are mounted on the mounting boss by a snap-fit ​​structure; And / or, the main board portion is provided with a connecting hole corresponding to the movable valve plate, the connecting hole connecting the movable cavity and the slot of the mounting groove.

8. The one-way exhaust valve as described in claim 3, characterized in that, The movable valve plate is made of silicone. And / or, the periphery of the movable valve plate abuts against the periphery of the second opening, and a sealing grease is provided at the abutment.

9. A storage cover for use in a storage compartment, the storage compartment comprising a compartment body having a storage opening, the storage cover covering the storage opening of the compartment body, characterized in that, The compartment cover includes: Cover plate; and The one-way exhaust valve as described in any one of claims 1 to 8, wherein the one-way exhaust valve is disposed on the cover plate.

10. The compartment cover as described in claim 9, characterized in that, The cover also includes a mounting component, through which the one-way exhaust valve is detachably mounted on the cover plate.

11. The compartment cover as described in claim 10, characterized in that, The mounting component includes a fastener and a first sealing element. The one-way exhaust valve is sealed to the fastener through the first sealing element, and the fastener is connected to the cover plate.

12. The compartment cover as described in claim 11, characterized in that, The first sealing element is provided with a receiving groove, the opening of the receiving groove is disposed away from the second opening, the one-way exhaust valve is disposed in the receiving groove, the fastener includes a sealing plate and a snap-fit ​​protrusion disposed on the sealing plate, the end of the snap-fit ​​protrusion away from the sealing plate is snapped with the cover plate, the sealing plate covers the opening of the receiving groove and is provided with an air hole corresponding to the first opening; the edge of the opening of the receiving groove abuts against the sealing plate.

13. The compartment cover as described in claim 12, characterized in that, The sidewall of the receiving groove is provided with a groove corresponding to the snap-fit ​​protrusion, the root of the snap-fit ​​protrusion is embedded in the groove, and the sidewall of the receiving groove is sandwiched between the outer side of the one-way exhaust valve and the side of the snap-fit ​​protrusion. And / or, the cover further includes a second seal, the edge of the sealing plate being sealed to the cover plate via the second seal; And / or, the diameter of the pores ranges from 1 mm to 3 mm.

14. The compartment cover as described in claim 12, characterized in that, The outer surface of the cover plate is recessed inward to form a receiving groove, the first sealing element and the one-way exhaust valve are received in the receiving groove, the sealing plate is located at the opening of the receiving groove, and the snap-fit ​​protrusion snaps into the groove wall of the receiving groove.

15. The compartment cover as described in claim 14, characterized in that, The bottom wall of the receiving groove abuts against the bottom surface of the receiving groove and has a supporting part protruding towards the one-way exhaust valve. The supporting part abuts against the end face of the one-way exhaust valve. The bottom wall of the receiving groove is provided with a first through hole, and the bottom wall of the receiving groove is provided with a second through hole corresponding to the first through hole. The first through hole is connected to the second opening of the one-way exhaust valve through the second through hole. And / or, the sidewall of the receiving groove is provided with a snap-fit ​​notch, and the snap-fit ​​protrusion is engaged in the snap-fit ​​notch.

16. A bean silo, characterized in that, The device includes a storage body and a storage cover as described in any one of claims 9 to 15, the storage body having a storage space and a storage opening communicating with the storage space, the storage cover being able to cover the storage opening, and the storage space being able to be used to store coffee beans.

17. The bean silo as described in claim 16, characterized in that, The opening pressure of the one-way exhaust valve (100) ranges from 300 Pa to 800 Pa.

18. A coffee machine, characterized in that, Includes the coffee machine body and the bean hopper as described in claim 16 or 17.

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