Pour-over coffee filter

Abstract

The utility model discloses a kind of hand-pouring coffee filter cups, comprising: filter cup cavity, the outside wall of filter cup cavity is used to place on coffee cup, the inner chamber of filter cup cavity is used to accommodate filter paper, wherein, filter paper is used to accommodate coffee powder and water injection;Rising flow channel, its rising inlet is located at filter cup cavity bottom;Descending flow channel, its top end is communicated with the highest point of rising flow channel, bottom end extends to descending outlet;The highest point of rising flow channel is at least higher than 2 / 3 of filter cup cavity height;Descending outlet is lower than rising inlet, and when filter cup cavity is placed on coffee cup, descending outlet is located in coffee cup. Realized hand-pouring coffee filter cup without mechanical moving parts, can automatically control extraction process and easily clean.

Description

Technical Field

[0001] This utility model relates to a coffee extraction device, specifically a pour-over coffee filter cup. Background Technology Pour-over coffee is a popular brewing method that relies on a filter cup to hold coffee grounds and hot water, allowing the hot water to penetrate the coffee grounds and drip out as coffee. Traditional pour-over filters are often funnel-shaped, where hot water is poured in and relies on gravity to freely penetrate the coffee grounds and fall. This method cannot effectively control the contact time between the water and coffee grounds, easily leading to under-extraction or over-extraction, which affects the taste of the coffee.

[0002] To address the aforementioned issues, some existing technologies have developed filter cups with mechanical switching devices. These cups control the flow of coffee liquid by incorporating moving parts such as valves or levers at the bottom. However, these designs have significant drawbacks: the mechanical moving parts are easily clogged or contaminated by coffee residue, leading to switch malfunction and reduced reliability; their complex structure increases manufacturing difficulty and cost; and they create cleaning dead zones, making cleaning and maintenance extremely inconvenient.

[0003] Therefore, there is an urgent need in this field for a pour-over coffee filter cup that requires no moving mechanical parts, can automatically control the extraction process, and is easy to clean. Utility Model Content

[0004] Based on the above situation, the main purpose of this utility model is to provide a pour-over coffee filter cup that is free of mechanical moving parts, can automatically control the extraction process, and is easy to clean.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A pour-over coffee filter cup, comprising: The filter cup cavity has an outer wall for placing on a coffee cup, and an inner cavity for accommodating filter paper, which holds coffee grounds and water. The rising flow channel has its rising inlet located at the bottom of the filter cup cavity; The descending flow channel is connected at its top to the highest point of the ascending flow channel and extends to the descending outlet at its bottom. The highest point of the rising flow channel is at least 2 / 3 higher than the height of the filter cup cavity; the falling outlet is lower than the rising inlet, and when the filter cup cavity is placed on the coffee cup, the falling outlet is located inside the coffee cup. Optionally, the rising inlet is located on the outer wall of the filter cup cavity; The rising flow channel is formed along the outer wall of the filter cup cavity, while the falling flow channel is farther away from the outer wall of the filter cup cavity relative to the rising flow channel. Optionally, the rising and falling flow channels enclose the filter cup handle. Optionally, the rising inlet is located on the inner wall of the filter cup cavity; The rising flow channel is formed within the inner wall of the filter cup cavity; the falling flow channel is at least partially disposed within the inner wall of the filter cup cavity and extends through the outer wall of the filter cup cavity, so that the falling outlet is located outside the filter cup cavity. Optionally, a liquid storage chamber is provided at the bottom of the filter cup cavity, which is connected to the inner cavity of the filter cup cavity and is lower than the rising inlet. Optionally, the downflow channel is a V-shaped tube, and the downflow outlet is located below the liquid storage chamber. Optionally, the inner wall of the filter cup cavity is provided with several permeation channels, which connect to the liquid storage cavity along the inner wall of the filter cup cavity. Optionally, the cross-sectional area of ​​the descending outlet is smaller than the cross-sectional area of ​​the ascending flow channel. Optionally, the bottom wall of the filter cup cavity is provided with an annular notch, which surrounds the descent outlet. Optionally, the filter cup cavity, the rising flow channel, and the falling flow channel are integrally formed. Beneficial effects

[0006] According to the hand-drip coffee filter cup disclosed in this embodiment, the outer wall of the filter cup cavity is used to place on a coffee cup, and the inner cavity of the filter cup cavity is used to contain coffee powder and water. The rising inlet of the rising channel is located at the bottom of the filter cup cavity. The top end of the falling channel is connected to the highest point of the rising channel, and the bottom end extends to the falling outlet. The highest point of the rising channel is at least 2 / 3 higher than the height of the filter cup cavity. The falling outlet is lower than the rising inlet, and when the filter cup cavity is placed on a coffee cup, the falling outlet is located inside the coffee cup.

[0007] When water is poured into the filter cup, coffee enters the rising channel from the inlet. When the liquid level is low, coffee cannot enter the falling channel, and the system remains closed. As water is poured in until the liquid level reaches the highest point of the rising channel, coffee begins to flow into the falling channel. The system switches to the open state, and a small amount of coffee drips from the outlet. With further water pouring, the falling channel fills with coffee, and the pressure difference between the rising and falling channels triggers a siphon effect. Coffee flows steadily and continuously from the outlet, and the system enters a highly efficient operating state. When the coffee level in the filter cup drops below the inlet position, the rising channel no longer draws in coffee, and all residual coffee in both the rising and falling channels is completely discharged from the outlet, at which point the system stops.

[0008] Therefore, this pour-over coffee filter cup eliminates moving parts (such as valves and levers), thus eliminating malfunctions caused by blockages in mechanical moving parts and improving reliability; the flow channel structure has no dead corners for cleaning, making maintenance and cleaning exceptionally simple; and the automatic siphon opening and closing effectively controls the water-coffee contact time, improving extraction uniformity, which means precise control of extraction quality. In summary, through the above structure, an automatic siphon extraction cycle is achieved without external intervention, significantly improving the uniformity and quality of coffee extraction. Other beneficial effects of this utility model will be explained in detail through the introduction of specific technical features and technical solutions in the specific embodiments. Those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions through the introduction of these technical features and technical solutions. Attached Figure Description

[0009] The preferred embodiments of this utility model will now be described with reference to the accompanying drawings. In the drawings: Figure 1 This is a schematic diagram of a three-dimensional structure of a pour-over coffee filter cup disclosed in this embodiment; Figure 2 This is a side view of a pour-over coffee filter cup disclosed in this embodiment; Figure 3 for Figure 2 A schematic diagram of the AA cross-sectional structure; Figure 4 This is a side view and a cross-sectional view of another pour-over coffee filter cup disclosed in this embodiment; Figure 5 This is a schematic diagram of the bottom structure of a pour-over coffee filter cup disclosed in this embodiment. Detailed Implementation

[0010] The present invention will now be described based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail, but well-known methods, processes, procedures, and elements are not described in detail in order to avoid obscuring the essence of the present invention.

[0011] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0012] Unless the context explicitly requires it, the words "comprising," "including," and similar terms throughout the specification and claims should be interpreted as encompassing rather than being exclusive or exhaustive; that is, meaning "including but not limited to."

[0013] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0014] To reliably and improve the quality of coffee extraction, this embodiment discloses a pour-over coffee filter. Please refer to [reference needed]. Figures 1 to 3 , Figure 1 This is a schematic diagram of a three-dimensional structure of a pour-over coffee filter cup disclosed in this embodiment. Figure 2This is a side view of a pour-over coffee filter cup disclosed in this embodiment. Figure 3 for Figure 2 The schematic diagram of the AA cross-sectional structure shows that the pour-over coffee filter cup includes: a filter cup cavity 1, an ascending channel 2, and a descending channel 3, wherein: the outer wall of the filter cup cavity 1 is used to place it on a coffee cup, and the inner cavity of the filter cup cavity 1 is used to accommodate filter paper, which is used to hold coffee grounds and water; the ascending channel 2 has an ascending inlet 21 located at the bottom of the filter cup cavity 1; the descending channel 3 has its top end connected to the highest point of the ascending channel 2, and its bottom end extends to the descending outlet 31; the highest point of the ascending channel 2 is at least 2 / 3 higher than the height of the filter cup cavity 1; the descending outlet 31 is lower than the ascending inlet 21, and when the filter cup cavity 1 is placed on a coffee cup, the descending outlet 31 is located inside the coffee cup.

[0015] It should be noted that, in the specific implementation process, the rising flow channel 2 and the falling flow channel 3 can be independent of the filter cup cavity 1, or they can be integrated with the filter cup cavity 1. Details are as follows: In one embodiment, the rising flow channel 2 and the falling flow channel 3 constitute independent flow channel components, separate from the filter cup cavity 1. During actual use, the flow channels are placed on the filter cup cavity 1. In this embodiment, the flow channel components formed by the rising flow channel 2 and the falling flow channel 3 are two physically separated independent components / parts from the filter cup cavity 1.

[0016] In another embodiment, the rising flow channel 2 and the falling flow channel 3 can be integrated into the filter cup cavity 1. Specifically, the rising flow channel 2 and the falling flow channel 3 can be integrated on the outside of the filter cup cavity 1, or they can be integrated inside the filter cup cavity 1. In this embodiment, the flow channel components formed by the rising flow channel 2 and the falling flow channel 3 are highly integrated with the filter cup cavity 1, forming a single integrated structure.

[0017] In the following embodiments, the integrated structure is used as an example for explanation. The working principle of the split structure is similar and will not be repeated here.

[0018] Please refer to Figure 1 and Figure 3 In a specific embodiment, the filter cup cavity 1 has a roughly funnel-shaped structure with a large opening at the top for injecting hot water and placing filter paper, and gradually narrows at the bottom. The outer wall of the filter cup cavity 1 is designed with a support structure such as a base or skirt, so that it can be stably placed on the mouth of a coffee cup or sharing pot.

[0019] Please refer to Figure 3The rising channel 2 has a rising inlet 21 located at the bottom of the filter cup cavity 1. Starting from the inlet, this channel extends primarily along the wall of the filter cup cavity 1 or inwards and upwards, forming a ascending passage. Its highest point is set at a position above 2 / 3, such as 3 / 4 or higher, of the total height of the filter cup cavity 1. This height setting ensures that the siphon process is only triggered after the liquid level in the filter cup has accumulated to a sufficient height and the coffee grounds have been fully soaked, thereby controlling the coffee extraction time.

[0020] Please refer to Figure 3 The top of the descending flow channel 3 smoothly connects to the highest point of the ascending flow channel 2. From this apex, the descending flow channel 3 extends downwards, eventually forming a descending outlet 31 at its bottom. The physical location of this descending outlet 31 is designed to be lower than the ascending inlet 21, and when the filter cup is in place, this outlet should extend into the coffee cup below. This height difference creates the driving force (gravity) for the siphon effect. In practice, when the liquid level in the filter cup reaches the highest point of the ascending flow channel 2, the coffee liquid flows into the descending flow channel 3. The pressure difference between the ascending flow channel 2 and the descending flow channel 3 triggers the siphon effect, achieving automatic opening and closing without a mechanical switch.

[0021] The working process and principle of this filter cup are as follows: 1. Initial water filling / soaking stage (off state) Place the filter paper and coffee grounds into the filter cup chamber 1, and begin pouring in hot water. At this point, the coffee liquid gathers at the bottom of the filter cup. Due to the low liquid level, although the coffee liquid can enter the rising channel 2 from the rising inlet 21, it cannot reach its highest point and therefore will not enter the descending channel 3. The system is in the off state, allowing the coffee grounds to be fully steeped.

[0022] 2. Siphon Trigger Phase (Activated) Continuous water injection causes the liquid level in the filter cup to rise, which in turn pushes the liquid level in the rising channel 2 to rise synchronously. When the liquid level reaches or exceeds the highest point of the rising channel 2, the coffee liquid begins to flow over the apex into the descending channel 3 and drips out from the descending outlet 31. The system then enters the open state.

[0023] 3. Stable siphon phase (working state) Once the coffee liquid fills the entire U-shaped flow channel (ascending flow channel 2 and descending flow channel 3), a stable siphon effect is established due to the gravitational pull of the liquid column at the outlet end of descending flow channel 3. At this time, the coffee liquid is continuously and rapidly drawn out from the bottom of the filter cup cavity 1 and discharged through the flow channel, and the system enters a highly efficient working state.

[0024] 4. Siphon termination phase (stopped state): When the liquid level in the filter cup drops below the rising inlet 21, air is drawn into the rising channel 2, the siphon effect is disrupted, and the liquid flow automatically stops. The remaining liquid in the rising channel 2 and the falling channel 3 will be drained by gravity, and the extraction process ends.

[0025] To ensure that the interior of the filter cup cavity 1 has a complete and regular space, in an optional embodiment, the flow channel system can be mainly arranged outside the filter cup. Please refer to [reference needed]. Figure 1 , Figure 3 The rising inlet 21 is located on the outer wall of the filter cup cavity 1; the rising channel 2 is formed along the outer wall of the filter cup cavity 1, and the main body of the rising channel 2 extends upward along the contour of the outer wall of the filter cup cavity 1. The falling channel 3 is located away from the outer wall of the filter cup cavity 1 relative to the rising channel 2. Specifically, the falling channel 3 starts from the point where it connects with the apex of the rising channel 2 and extends away from the outer wall of the filter cup cavity 1 relative to the rising channel 2, ultimately placing the falling outlet 31 at a lower position that facilitates the flow of liquid into the coffee cup.

[0026] In this embodiment, the flow channel system is mainly arranged outside the filter cup. On the one hand, it does not occupy the brewing space, ensuring that the filter cup cavity 1 has a complete and regular space, which is convenient for placing filter paper and coffee powder. The distribution of coffee powder and water penetration will not be affected by the internal flow channel. On the other hand, it can enhance the structural strength. The external flow channel structure can act as a reinforcing rib, enhancing the overall mechanical strength of the filter cup.

[0027] To improve space utilization and structural compactness, in an optional embodiment, the rising flow channel 2 and the falling flow channel 3 enclose each other to form the filter cup handle. That is, the rising flow channel 2 and the falling flow channel 3 are not simply pipes in space, but are cleverly designed to jointly enclose a hollow cavity, which constitutes the filter cup handle. Specifically, this integrated "flow channel-handle" structure can be understood as follows: the area for the user's hand to grip is the space defined by the outer walls of the rising flow channel 2 and the falling flow channel 3. Thus, the originally single-function flow channel is endowed with structural support and gripping functions.

[0028] In this embodiment, the handle is formed by enclosing the rising flow channel 2 and the falling flow channel 3, thus eliminating the need to design, manufacture and connect a separate handle component. The flow guiding function and the gripping function are integrated into the same physical structure, which greatly simplifies the product structure, improves space utilization and structural compactness.

[0029] Of course, in some embodiments, the area enclosed by the rising flow channel 2 and the falling flow channel 3 can also be a closed area (i.e., not a hollow cavity), which facilitates the appearance design of the enclosed area.

[0030] To ensure a smooth and clean outer surface of the filter cup, and for ease of carrying and storage, compared to embodiments where the flow channels are externally located, the rising flow channel 2 and the falling flow channel 3 can also be at least partially embedded within the inner wall. Please refer to [reference needed]. Figure 4 , Figure 4 This is a side view and cross-sectional view of another pour-over coffee filter cup disclosed in this embodiment. In an optional embodiment, the rising inlet 21 is disposed on the inner wall of the filter cup cavity 1, communicating with the inner cavity of the filter cup cavity 1. In this embodiment, the rising channel 2 is not attached to the outer wall of the cavity, but is formed inside the inner wall of the filter cup cavity 1. It can be understood that the wall thickness of the filter cup is thickened, and a hidden channel extending from the bottom upward is prefabricated or processed inside it as the rising channel.

[0031] Similarly, the descending flow channel 3 is also at least partially disposed within the inner wall of the filter cup cavity 1 and extends through the outer wall of the filter cup cavity 1, so that the descending outlet 31 is located outside the filter cup cavity 1. Specifically, the descending flow channel 3 is also at least partially disposed within the inner wall of the filter cup cavity 1, and after flowing through an internal path, it extends through the outer wall of the filter cup cavity 1, thereby allowing the final descending outlet 31 to be located outside the filter cup cavity 1 and at a position lower than the rising inlet 21. Specifically, as Figure 4 The dotted lines indicate the path of the flow channels (upward flow channel 2, downward flow channel 3) inside the inner wall of the filter cup cavity 1. Specifically, the upward flow channel 2 and the downward flow channel 3 can be arranged around the permeation flow channel 11 (see description below).

[0032] In this embodiment, the rising channel 2 and the falling channel 3 are at least partially embedded in the inner wall, making the outer surface of the filter cup smooth and clean. Because the channels are built-in, the entire filter cup has a smaller footprint, making it easier to carry and store. In addition, the channels are wrapped inside the filter cup wall material, so when the coffee liquid flows in the channels, its heat will be dissipated into the environment more slowly, which helps to maintain a more stable temperature during the extraction process and has a positive impact on improving the extraction quality.

[0033] It should be noted that although the flow channel in this embodiment is not visible, its working principle is the same as that of the above embodiments: relying on the liquid level height to trigger the siphon to achieve automatic start and stop.

[0034] In order to further optimize the extraction quality and achieve fine separation of liquid, in an optional embodiment, a liquid storage chamber 10 is provided at the bottom of the filter cup cavity 1. The liquid storage chamber 10 is connected to the inner cavity of the filter cup cavity 1 and is lower than the rising inlet 21.

[0035] Please refer to Figure 3In this embodiment, the liquid storage chamber 10 is a relatively low-lying recess or chamber structure located at the bottom of the filter cup cavity 1. The liquid storage chamber 10 is directly connected to the inner cavity of the filter cup cavity 1 through its top opening, and the bottom of the liquid storage chamber 10 is lower than the rising inlet 21 of the rising flow channel 2. This crucial height difference design, combined with the siphon principle, enables active screening of the coffee liquid. Specifically, during the extraction process, all the permeated coffee liquid first gathers in the lowest-lying liquid storage chamber 10. As the liquid level in the liquid storage chamber 10 rises, when its height exceeds the rising inlet 21, the coffee liquid begins to enter the rising flow channel 2, eventually triggering the siphon effect. Once the main, high-quality coffee liquid in the filter cup has been completely drawn out by the siphon effect, the liquid level in the filter cup begins to drop. Once the liquid level drops to the bottom of the liquid storage chamber 10, i.e., below the height of the rising inlet 21, the siphon effect immediately stops. Due to the cessation of the siphon effect, this unwanted liquid is effectively isolated within the liquid storage chamber 10 and is not discharged into the final coffee cup. Therefore, the lowest quality coffee liquid at the very end was diverted.

[0036] In this embodiment, the process of selecting the best coffee liquid and discarding the worst liquid can be achieved using only a liquid storage chamber with a height difference, without any additional complex parts, thus simplifying the operation of high-quality hand-drip coffee.

[0037] To prevent coffee from splashing out of the cup, in an optional embodiment, the descending flow channel 3 is a V-shaped tube, and the descending outlet 31 is located below the liquid storage chamber 10. For details, please refer to... Figure 3 The V-shaped tube forms the inlet section of the descending flow channel 3, with its opening top connected to the ascending channel 2 to receive the coffee liquid in the filter cup. Subsequently, the tube rapidly descends and converges towards the center of the filter cup, forming a V-shaped or approximately conical inflection point. Finally, the tube extends upwards again, ultimately forming the descending outlet 31. In this embodiment, the V-shaped tube design acts as a buffer. The coffee liquid initially flows downwards along one side of the V-shaped tube. At the inflection point of the V-shape, the flow direction of the fluid undergoes a sharp change at a large angle, thereby consuming the vertical kinetic energy of the liquid flow and effectively preventing splashing and turbulence, allowing the coffee liquid to smoothly dissolve into the cup.

[0038] To overcome the potential problem of coffee liquid stagnation at the bottom of the filter cup and to ensure that all coffee liquid is efficiently and orderly guided to the reservoir 10, in an optional embodiment, please refer to... Figure 3The filter cup cavity 1 has several permeation channels 11 on its inner wall, which connect to the liquid storage chamber 10. Specifically, the permeation channels 11 are grooves or channels extending longitudinally (from a higher position to the bottom) along the inner wall of the filter cup cavity 1. The upper ends of these permeation channels 11 open into the inner wall of the filter cup cavity, and the lower ends all connect to the liquid storage chamber 10. In this embodiment, by providing several permeation channels 11, a preferred flow path with less resistance is provided for the coffee liquid adhering to the inner wall of the filter cup. Once the liquid comes into contact with the channel, it will quickly flow downward along this path, thereby effectively avoiding the stagnation of liquid on the side wall.

[0039] To accelerate siphon formation, in an optional embodiment, the cross-sectional area of ​​the descending outlet 31 is smaller than that of the ascending channel 2. Specifically, when the fluid (coffee liquid) flows from the ascending channel 2 with a larger cross-sectional area into the descending outlet 31 with a smaller cross-sectional area, its flow velocity increases significantly. The higher flow velocity means that the liquid column in the descending channel 3 can build up more quickly, thereby forming a pressure difference (gravitational potential energy difference) sufficient to pull the liquid in the ascending channel 2 more rapidly. This shortens the transition time from "dripping" to "stable siphon," making the siphon effect start up faster and more reliably.

[0040] To prevent liquid overflow from the descending outlet 31, in an optional embodiment, the bottom wall of the filter cup cavity 1 is provided with an annular notch 12, which surrounds the descending outlet 31. Please refer to... Figure 3 and Figure 5 , Figure 5 This is a schematic diagram of the bottom structure of a pour-over coffee filter cup disclosed in this embodiment. The annular notch 12 is a ring-shaped groove or channel around the bottom of the filter cup, surrounding the descending outlet 31. Alternatively, it can form a gradient groove. In this embodiment, the arrangement of the annular notch 12 physically blocks the path of liquid flowing out of the descending outlet 31 outwards along the bottom plane. When liquid attempts to flow outwards, it first falls into the annular notch 12. Surface tension causes the liquid to accumulate within the notch, preventing it from flowing beyond the notch to the outer edge of the filter cup. This maintains the cleanliness of the filter cup's exterior, improving reliability and user experience.

[0041] In an optional implementation, the filter cup cavity 1, the rising flow channel 2, and the falling flow channel 3 are integrally molded. That is, the entire filter cup (including all the complex internal and external flow channels and cavities) is a single, complete component manufactured through a single injection molding (such as food-grade plastic), a single die casting (such as metal), or a single slip casting and sintering (such as ceramic) process, without any splicing or assembly interfaces. Therefore, no coffee residue remains, eliminating dead spots for bacterial growth and making cleaning very easy.

[0042] According to the hand-drip coffee filter cup disclosed in this embodiment, the outer wall of the filter cup cavity is used to place on a coffee cup, and the inner cavity of the filter cup cavity is used to contain coffee powder and water. The rising inlet of the rising channel is located at the bottom of the filter cup cavity. The top end of the falling channel is connected to the highest point of the rising channel, and the bottom end extends to the falling outlet. The highest point of the rising channel is at least 2 / 3 higher than the height of the filter cup cavity. The falling outlet is lower than the rising inlet, and when the filter cup cavity is placed on a coffee cup, the falling outlet is located inside the coffee cup.

[0043] When water is poured into the filter cup, coffee enters the rising channel from the inlet. When the liquid level is low, coffee cannot enter the falling channel, and the system remains closed. As water is poured in until the liquid level reaches the highest point of the rising channel, coffee begins to flow into the falling channel. The system switches to the open state, and a small amount of coffee drips from the outlet. With further water pouring, the falling channel fills with coffee, and the pressure difference between the rising and falling channels triggers a siphon effect. Coffee flows steadily and continuously from the outlet, and the system enters a highly efficient operating state. When the coffee level in the filter cup drops below the inlet position, the rising channel no longer draws in coffee, and all residual coffee in both the rising and falling channels is completely discharged from the outlet, at which point the system stops.

[0044] Therefore, this pour-over coffee filter cup eliminates moving parts (such as valves and levers), thus eliminating malfunctions caused by blockages in mechanical moving parts and improving reliability; the flow channel structure has no dead corners for cleaning, making maintenance and cleaning exceptionally simple; and the automatic siphon opening and closing effectively controls the water-coffee contact time, improving extraction uniformity, which means precise control of extraction quality. In summary, through the above structure, an automatic siphon extraction cycle is achieved without external intervention, significantly improving the uniformity and quality of coffee extraction. It will be understood by those skilled in the art that the above-described preferred solutions can be freely combined and superimposed without conflict. The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings; for example, two consecutively indicated blocks may actually be executed substantially in parallel, or sometimes in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions. The numbering of each step in this document is for ease of explanation and reference only and is not intended to limit the order of execution. The specific execution order is determined by the technology itself, and those skilled in the art can determine various permissible and reasonable orders based on the technology itself.

[0045] Those skilled in the art will understand that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0046] It should be understood that the above-described embodiments are merely exemplary and not restrictive. Without departing from the basic principles of this utility model, any obvious or equivalent modifications or substitutions made by those skilled in the art regarding the above details will be included within the scope of the claims of this utility model.

Claims

1. A pour-over coffee filter, characterized in that, include: A filter cup cavity (1) has an outer wall for placing on a coffee cup and an inner cavity for accommodating filter paper, wherein the filter paper is used to hold coffee powder and water. The rising flow channel (2) has its rising inlet (21) located at the bottom of the filter cup cavity (1); The descending channel (3) is connected at its top to the highest point of the ascending channel (2) and extends to the descending outlet (31) at its bottom. The highest point of the rising channel (2) is at least 2 / 3 higher than the height of the filter cup cavity (1); the descending outlet (31) is lower than the rising inlet (21), and when the filter cup cavity (1) is placed on the coffee cup, the descending outlet (31) is located inside the coffee cup.

2. The pour-over coffee filter cup as described in claim 1, characterized in that, The rising inlet (21) is located on the outer wall of the filter cup cavity (1); The rising channel (2) is formed along the outer wall of the filter cup cavity (1), and the falling channel (3) is away from the outer wall of the filter cup cavity (1) relative to the rising channel (2).

3. The pour-over coffee filter cup as described in claim 2, characterized in that, The rising channel (2) and the falling channel (3) enclose each other to form the filter cup handle.

4. The pour-over coffee filter cup as described in claim 1, characterized in that, The rising inlet (21) is located on the inner wall of the filter cup cavity (1); The rising channel (2) is formed inside the inner wall of the filter cup cavity (1); the falling channel (3) is at least partially disposed inside the inner wall of the filter cup cavity (1) and extends through the outer wall of the filter cup cavity (1) so that the falling outlet (31) is located outside the filter cup cavity (1).

5. The pour-over coffee filter cup as described in any one of claims 1-4, characterized in that, The bottom of the filter cup cavity (1) is provided with a liquid storage cavity (10), which is connected to the inner cavity of the filter cup cavity (1) and is lower than the rising inlet (21).

6. The pour-over coffee filter cup as described in claim 5, characterized in that, The descending channel (3) is a V-shaped tube, and the descending outlet (31) is located below the liquid storage chamber (10).

7. The pour-over coffee filter cup as described in claim 5, characterized in that, The filter cup cavity (1) has a plurality of permeation channels (11) on its inner wall, and the permeation channels (11) are connected to the liquid storage cavity (10) along the inner wall of the filter cup cavity (1).

8. The pour-over coffee filter cup as described in any one of claims 1-4, characterized in that, The cross-sectional area of ​​the descending outlet (31) is smaller than that of the ascending channel (2).

9. The pour-over coffee filter cup as described in any one of claims 1-4, characterized in that, The bottom wall of the filter cup cavity (1) is provided with an annular notch (12), which is arranged around the descending outlet (31).

10. The pour-over coffee filter cup as described in any one of claims 1-4, characterized in that, The filter cup cavity (1), the rising flow channel (2) and the falling flow channel (3) are integrally formed.

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