A high pressure coffee extraction device

Abstract

The utility model discloses a high pressure type coffee extraction device, and it improves the coffee quality through two-stage dynamic extraction mechanism: the first stage utilizes the steam generated by steam generating device to flow into the upper shell of extraction device through pipeline, and the steam flows to steam buffer area through the first steam perforation of upper shell, and the steam flows to coffee powder through the second steam perforation of tabletting, and the coffee powder is wetted, and after the upper part or all of coffee powder in coffee powder containing area is wetted, the second stage is entered: the tabletting falls and compacts coffee powder through pressure under the pressure trigger of extraction device, and the contact density of steam and coffee powder is greatly increased, and the penetration efficiency bottleneck of traditional pure steam extraction is broken. The design realizes the synergistic effect of "wetting first and compacting later" without external mechanical intervention, not only improves the extraction uniformity and soluble matter extraction rate, but also endows the coffee liquid with more abundant oil and mellow taste, and the structure is simple and reliable, and the operation degree of automation is high.

Description

Technical Field

[0001] This utility model relates to the field of coffee extraction technology, and in particular to a high-pressure coffee extraction device. Background Technology

[0002] Traditional steam-based coffee extraction devices rely on high-pressure steam to directly penetrate a static layer of coffee grounds for extraction. This method has significant drawbacks: during the initial penetration, the steam tends to cause localized over-extraction of the surface layer of the coffee grounds while the deeper layers are insufficiently moistened, creating an extraction channel effect; at the same time, the lack of physical compaction of the coffee grounds results in insufficient effective contact area between the steam and the coffee grounds, leading to low extraction rates of soluble substances, uneven extraction, and ultimately affecting the body and flavor profile of the coffee. Utility Model Content

[0003] The main purpose of this invention is to provide a high-pressure coffee extraction device, which aims to improve the extraction efficiency and effect of coffee powder.

[0004] To achieve the above objectives, this utility model proposes a high-pressure coffee extraction device, comprising:

[0005] Steam generating equipment;

[0006] An extraction device, wherein the steam generator is connected to the extraction device via a pipeline;

[0007] The extraction apparatus includes:

[0008] The upper shell has a steam inlet at the top, and the bottom of the upper shell has several first steam perforations;

[0009] A coffee container with perforations at the bottom is detachably located at the bottom of the upper shell, and its inner cavity forms a steam buffer zone and a coffee powder holding zone from top to bottom;

[0010] The cup body is detachably connected to the bottom of the container.

[0011] The pressure plate with a second steam perforation has a diameter that matches the inner diameter of the coffee powder receiving area and is smaller than the maximum inner diameter of the steam buffer zone.

[0012] An elastic support is provided in the steam buffer, which supports the pressing plate in the initial state to form a gap between the pressing plate and the coffee powder;

[0013] High-pressure steam flows into the upper shell through the pipe and pre-wets the coffee powder through the first steam perforation and the second steam perforation. When the pressure in the steam buffer exceeds the threshold of the elastic support, the press moves down and falls onto the coffee powder. Steam penetrates the powder layer to extract the coffee, and the coffee liquid falls into the collection cup through the second coffee liquid perforation.

[0014] Preferably, the upper shell or material box is provided with a pressure relief valve, the opening pressure threshold of which is higher than the compression threshold of the elastic support and lower than the maximum pressure bearing value of the extraction device.

[0015] Preferably, the cross-section of the steam buffer zone is an inverted trapezoid, wider at the top and narrower at the bottom.

[0016] Preferably, the steam buffer zone is provided with a plurality of elastic supports spaced circumferentially.

[0017] Preferably, the elastic support is made of stainless steel.

[0018] Preferably, the cross-section of the first steam perforation is an inverted trapezoid, which is larger at the top and smaller at the bottom.

[0019] Preferably, the cross-section of the coffee liquid perforation is a trapezoid with a smaller top and a larger bottom.

[0020] Preferably, the upper shell and the material box are detachably connected by a threaded connection or by a first snap-fit ​​structure.

[0021] Preferably, the cup body and the container are detachably connected by a threaded connection or by a second snap-fit ​​structure.

[0022] Preferably, a first sealing ring is provided at the mating position between the upper shell and the material box, and a second sealing ring is provided at the mating position between the cup body and the material box.

[0023] The beneficial effects of this utility model are:

[0024] In operation, the present invention places coffee powder into the coffee powder receiving area, with the upper surface of the coffee powder below the steam buffer. The press plate is placed in the steam buffer through an elastic support, so that the press plate and the upper surface of the coffee powder are arranged with an upper and lower gap. The coffee quality is significantly improved through a two-stage dynamic extraction mechanism: In the first stage, the steam generated by the steam generator flows into the upper shell of the extraction device through a pipe, flows to the steam buffer through the first steam perforation of the upper shell, and flows to the coffee powder through the second steam perforation of the press plate, thus wetting the coffee powder. After wetting the upper part or all of the coffee powder in the coffee powder receiving area, the second stage begins: The internal pressure of the extraction device gradually increases until it automatically triggers the press plate to break through the support threshold of the elastic support. The press plate falls and compacts the coffee powder through the internal pressure of the extraction device, greatly increasing the contact density between the steam and the coffee powder, and breaking through the penetration efficiency bottleneck of traditional pure steam extraction. This design achieves a synergistic effect of "wetting before compaction" without the need for external mechanical intervention. It not only improves the uniformity of extraction and the extraction rate of soluble substances, but also gives the coffee liquid a richer oil and a fuller taste. At the same time, the structure is simple and reliable and the operation is highly automated. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present utility model;

[0026] Figure 2 This is a cross-sectional view of the extraction apparatus;

[0027] Figure 3 This is an exploded view of the extraction apparatus. Detailed Implementation

[0028] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0029] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of the components in a certain specific posture (such as the relative positional relationship and movement of the components in Figure 1). If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such 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, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, 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, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0031] This invention proposes a high-pressure coffee extraction device.

[0032] In this embodiment of the utility model, such as Figures 1 to 3 As shown, the high-pressure coffee extraction device includes:

[0033] Steam generator 1;

[0034] An extraction device, wherein the steam generator 1 is connected to the extraction device via a pipe 100;

[0035] The extraction apparatus includes:

[0036] The upper shell 2 is provided with a steam inlet at the top, and the bottom of the upper shell 2 is provided with a plurality of first steam perforations 21;

[0037] The container 3, which has a coffee liquid perforation 31 at the bottom, is detachably located at the bottom of the upper shell 2. Its inner cavity forms a steam buffer zone 32 and a coffee powder holding area 33 from top to bottom.

[0038] The cup body 4 is detachably connected to the bottom of the material box 3;

[0039] The pressure plate 5 with the second steam perforation 51 has a diameter that matches the inner diameter of the coffee powder receiving area 33 and is smaller than the maximum inner diameter of the steam buffer zone 32.

[0040] An elastic support 6 is provided in the steam buffer 32. In the initial state, the elastic support 6 supports the pressing plate 5 to form a gap space between the pressing plate 5 and the coffee powder.

[0041] After high-pressure steam flows into the interior of the upper shell 2 through the pipe 100, it pre-wets the coffee powder by passing through the first steam perforation 21 and the second steam perforation 51 in sequence. When the pressure of the steam buffer 32 exceeds the threshold of the elastic support 6, the pressing plate 5 moves down and falls onto the coffee powder. The steam penetrates the powder layer for extraction, and the coffee liquid falls into the collection cup 4 through the second coffee liquid perforation 31.

[0042] Specifically, the upper shell 2 or the material box 3 is equipped with a pressure relief valve 7. The opening pressure threshold of the pressure relief valve 7 is higher than the compression threshold of the elastic support 6 and lower than the maximum pressure value of the extraction device.

[0043] Specifically, the cross-section of the steam buffer zone 32 is an inverted trapezoid with a larger top and a smaller bottom.

[0044] Specifically, the steam buffer zone 32 is provided with a plurality of elastic support members 6 at circumferential intervals.

[0045] Specifically, the elastic support 6 is made of stainless steel.

[0046] Specifically, the cross-section of the first steam perforation 21 is an inverted trapezoid with a larger top and a smaller bottom.

[0047] Specifically, the cross-section of the coffee liquid perforation 31 is a trapezoid with a smaller top and a larger bottom.

[0048] Specifically, the upper shell 2 and the material box 3 are detachably connected by a threaded connection or by a first snap-fit ​​structure.

[0049] Specifically, the cup body 4 and the material box 3 are detachably connected by a threaded connection or by a second snap-fit ​​structure.

[0050] Specifically, a first sealing ring is provided at the mating position of the upper shell 2 and the material box 3, and a second sealing ring is provided at the mating position of the cup body 4 and the material box 3.

[0051] It should be noted that the first snap-fit ​​structure, the second snap-fit ​​structure, the first sealing ring, the second sealing ring, the pressure relief valve 7, and the steam generator 1 are all existing technologies, and their specific structures will not be described in detail here.

[0052] Specifically, relevant sealing measures should be further installed at the connection positions at both ends of the pipe 100, depending on the actual usage.

[0053] The beneficial effects of this utility model are:

[0054] In operation, this utility model involves placing coffee powder in the coffee powder receiving area, ensuring the upper surface of the coffee powder is below the steam buffer zone. A compressor is positioned within the steam buffer zone via an elastic support, creating a vertically spaced relationship between the compressor and the upper surface of the coffee powder. This two-stage dynamic extraction mechanism significantly improves coffee quality: In the first stage, steam generated by a steam generator flows through a pipe into the upper shell of the extraction device. It then flows through the first steam perforation in the upper shell to the steam buffer zone, and through the second steam perforation of the compressor to the coffee powder, wetting it. After wetting the upper part or all of the coffee powder in the receiving area, the second stage begins: the moistened coffee powder is difficult for the steam to penetrate, causing the pressure above the coffee powder to gradually increase until the compressor is automatically triggered to break through the support threshold of the elastic support. The compressor then falls and is further compacted by the internal pressure of the extraction device, significantly increasing the contact density between the steam and the coffee powder, thus overcoming the penetration efficiency bottleneck of traditional pure steam extraction. This design achieves a synergistic effect of "wetting before compaction" without the need for external mechanical intervention. It not only improves the uniformity of extraction and the extraction rate of soluble substances, but also gives the coffee liquid a richer oil and a fuller taste. At the same time, the structure is simple and reliable and the operation is highly automated.

[0055] Understandably, the extracted coffee liquid falling into the cup and the pressure relief valve can alleviate the pressure in the space above the coffee powder holding area, preventing the pressure from simply increasing and avoiding any safety hazards.

[0056] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using 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 high-pressure coffee extraction device, characterized in that, include: Steam generator (1); An extraction device, wherein the steam generator (1) is connected to the extraction device via a pipe (100); The extraction apparatus includes: The upper shell (2) is provided with a steam inlet at the top, and the bottom of the upper shell (2) is provided with a number of first steam perforations (21). A container (3) with a coffee liquid perforation (31) at the bottom is detachably located at the bottom of the upper shell (2), and its inner cavity forms a steam buffer zone (32) and a coffee powder holding area (33) from top to bottom. The cup body (4) is detachably connected to the bottom of the material box (3); A pressure plate (5) with a second steam perforation (51) has a diameter that matches the inner diameter of the coffee powder receiving area (33) and is smaller than the maximum inner diameter of the steam buffer zone (32); An elastic support (6) is provided in the steam buffer (32), which supports the pressing plate (5) in the initial state to form a gap space between the pressing plate (5) and the coffee powder; After high-pressure steam flows into the interior of the upper shell (2) through the pipe (100), it pre-wets the coffee powder by passing through the first steam perforation (21) and the second steam perforation (51) in sequence. When the pressure of the steam buffer (32) exceeds the threshold of the elastic support (6), the pressing plate (5) moves down and falls on the coffee powder. The steam penetrates the powder layer for extraction, and the coffee liquid falls into the collection cup (4) through the second coffee liquid perforation (31).

2. The high-pressure coffee extraction device as described in claim 1, characterized in that: The upper shell (2) or the material box (3) is provided with a pressure relief valve (7). The opening pressure threshold of the pressure relief valve (7) is higher than the compression threshold of the elastic support (6) and lower than the maximum pressure value of the extraction device.

3. The high-pressure coffee extraction device as described in claim 1, characterized in that: The cross-section of the steam buffer zone (32) is an inverted trapezoid with a larger top and a smaller bottom.

4. The high-pressure coffee extraction device as described in claim 1, characterized in that: The steam buffer zone (32) is provided with a plurality of elastic supports (6) spaced circumferentially.

5. The high-pressure coffee extraction device as described in claim 1, characterized in that: The elastic support (6) is made of stainless steel.

6. The high-pressure coffee extraction device as described in claim 1, characterized in that: The cross-section of the first steam perforation (21) is an inverted trapezoid with a larger top and a smaller bottom.

7. The high-pressure coffee extraction device as described in claim 1, characterized in that: The cross-section of the coffee liquid perforation (31) is a trapezoid with a smaller top and a larger bottom.

8. The high-pressure coffee extraction device as described in claim 1, characterized in that: The upper shell (2) and the material box (3) are detachably connected by threaded connection or by a first snap-fit ​​structure.

9. The high-pressure coffee extraction device as described in claim 1, characterized in that: The cup body (4) and the material box (3) are detachably connected by a threaded connection or by a second snap-fit ​​structure.

10. The high-pressure coffee extraction device as described in claim 1, characterized in that: The upper shell (2) and the material box (3) are provided with a first sealing ring at the mating position, and the cup body (4) and the material box (3) are provided with a second sealing ring at the mating position.

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