Brewing device and coffee machine

Abstract

The brewing device comprises a frame, a driving main shaft, an upper piston, a brewing cylinder and a lower piston, the driving main shaft is installed on the frame in a rotating mode, the upper piston is directly or indirectly fixed to the frame, the brewing cylinder is installed on the driving main shaft, the lower piston is installed in the brewing cylinder, and the driving main shaft is installed on the frame in a rotating mode. The upper piston and the lower piston close the brewing cylinder to form a brewing chamber under the driving of the driving main shaft, the brewing device comprises a limiting mechanism, the limiting mechanism is installed on the brewing cylinder, the first end of the limiting mechanism is connected with the brewing cylinder, and the second end of the limiting mechanism is connected with the lower piston. The lower piston is limited by arranging the limiting mechanism, so that the lifting speed of the lower piston is slower than that of the brewing cylinder, the structure is simple, the practicability is high, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee machines, in particular to a brewing device and a coffee machine. Background Art

[0002] A coffee machine is a machine used to make coffee. It can make coffee by grinding coffee beans, pressurizing steam or using a water pump, etc. Coffee machines usually have various functions, such as adjusting the coffee concentration, making different types of coffee, etc.; they are widely used in places such as homes, offices, coffee shops, etc.

[0003] In current coffee machines, after pouring coffee powder into the brewing cylinder and squeezing it for brewing, the brewed coffee solution is pumped into the coffee cup through a brewing head. In the prior art, the brewing chamber is composed of an upper piston, a brewing cylinder and a lower piston. The lower piston is slidably installed in the brewing cylinder. When the driving mechanism drives the brewing cylinder and the lower piston to rise, the rising speed of the lower piston is slower than that of the brewing cylinder through a blocking mechanism, so that the lower piston gradually descends relative to the brewing cylinder. After adding coffee powder, the driving mechanism continues to drive the brewing cylinder and the lower piston to rise until the upper piston extends into the brewing cylinder, forming a brewing chamber between the upper piston, the brewing cylinder and the lower piston. After the coffee brewing is completed, the driving mechanism drives the brewing cylinder and the lower piston to descend. Through the setting of the blocking mechanism, the descending speed of the lower piston is slower than that of the brewing cylinder, so that the lower piston gradually rises relative to the brewing cylinder until the top of the lower piston is parallel to the top of the brewing cylinder, and then the slag scraping mechanism clears the coffee residue on the brewing cylinder.

[0004] In the prior art, such as the US invention patent with the patent number: US5316781A, a blocking mechanism is provided at the lower end of the extractor. When the lower piston moves downward and touches the blocking mechanism, the blocking mechanism provides a limiting force to the lower piston, making the moving speed of the lower piston slower.

[0005] In the prior art, such as the Chinese utility model patent with the patent number: CN202020705567.X, an elastic combination is arranged inside the lower piston, and a limiting device is arranged at the lower end of the extractor. When the lower piston moves downward and touches the limiting device, the limiting device provides a limiting force to the elastic combination inside the lower piston, making the moving speed of the lower piston slower.

[0006] Although the above two technical solutions can both increase the resistance to the lifting and lowering of the lower piston, the structures are complex and the production costs are relatively high.

[0007] In view of this, a new technical solution is needed to solve the above technical problems. Summary of the Utility Model

[0008] In view of the deficiencies of the prior art, the purpose of the present utility model is to provide a brewing device and a coffee machine to solve the problems raised in the background art.

[0009] To achieve the above purpose, the present utility model provides a brewing device in a first aspect, including: a frame, a driving main shaft, an upper piston, a brewing cylinder and a lower piston. The driving main shaft is rotatably installed on the frame. The upper piston is directly or indirectly fixed to the frame. The brewing cylinder is installed on the driving main shaft. The lower piston is installed in the brewing cylinder. Driven by the driving main shaft, the upper piston and the lower piston close the brewing cylinder to form a brewing chamber, including a limiting mechanism. The limiting mechanism is installed on the brewing cylinder. The first end of the limiting mechanism is connected to the brewing cylinder, and the second end of the limiting mechanism is connected to the lower piston.

[0010] In a further technical solution, the limiting mechanism is selected as an elastic element.

[0011] In a further technical solution, the elastic element is a spring.

[0012] In a further technical solution, the first end of the spring is connected to the inner wall of the brewing cylinder, and the second end of the spring is connected to the lower end of the lower piston.

[0013] In a further technical solution, the spring is sleeved on the lower piston.

[0014] In a further technical solution, an installation cavity for installing the limiting mechanism is provided between the lower piston and the brewing cylinder.

[0015] In a further technical solution, the frame is provided with a mounting seat for restricting the position of the lower piston, and the mounting seat is located below the lower piston.

[0016] In a further technical solution, a liquid distribution seat is provided on the top of the lower piston, and the top of the liquid distribution seat is a plane.

[0017] In a further technical solution, a slag scraping mechanism is provided on the brewing cylinder.

[0018] In a second aspect, the present utility model also provides a coffee machine, including the brewing device.

[0019] Compared with the prior art, the present utility model brings the following technical effects:

[0020] In the brewing device of the present utility model, the lower piston is limited by the setting of the limiting mechanism, so that the lifting speed of the lower piston is slower than that of the brewing cylinder. The structure is simple, the practicability is strong, and the production cost is reduced.

[0021] The coffee machine of the present utility model includes all the technical features and beneficial effects of the brewing device, and thus will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural view of the brewing device of the present utility model.

[0024] Figure 2 It is another schematic structural view of the brewing device of the present utility model.

[0025] Figure 3 It is an exploded schematic view of the brewing cylinder, lower piston, limiting mechanism and slag scraping mechanism of the present utility model.

[0026] Figure 4 It is a schematic structural view after the brewing cylinder and the lower piston descend.

[0027] MAIN ELEMENT SYMBOL DESCRIPTION:

[0028] 1. Frame; 11. Mounting seat;

[0029] 2. Driving main shaft;

[0030] 3. Upper piston;

[0031] 4. Brewing cylinder;

[0032] 5. Lower piston; 51. Liquid distribution seat;

[0033] 6. Brewing chamber;

[0034] 7. Limiting mechanism;

[0035] 8. Slag scraping mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and should not be construed as limiting the present utility model.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0039] In the present utility model, unless otherwise clearly defined and limited, the terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0041] Embodiment 1

[0042] See Figures 1-3As shown in the figure, the brewing device includes: a frame 1, a driving main shaft 2, an upper piston 3, a brewing cylinder 4, and a lower piston 5. The driving main shaft 2 is rotatably installed on the frame 1. The upper piston 3 is directly or indirectly fixed to the frame 1. The brewing cylinder 4 is installed on the driving main shaft 2. The lower piston 5 is installed in the brewing cylinder 4. Driven by the driving main shaft 2, the upper piston 3 and the lower piston 5 close the brewing cylinder 4 to form a brewing chamber 6. It includes a limiting mechanism 7. The limiting mechanism 7 is installed on the brewing cylinder 4. The first end of the limiting mechanism 7 is connected to the brewing cylinder 4, and the second end of the limiting mechanism 7 is connected to the lower piston 5. By setting the limiting mechanism 7, the lower piston 5 is limited, so that the lifting speed of the lower piston 5 is slower than that of the brewing cylinder 4. The structure is simple, the practicability is strong, and the production cost is reduced.

[0043] In a further specific embodiment, the limiting mechanism 7 is an elastic element. The elastic element is a spring. The frame 1 is provided with a mounting seat 11 for limiting the position of the lower piston 5. The mounting seat 11 is located below the lower piston 5. By setting the mounting seat 11, the descending position of the lower piston 5 is limited, that is, the mounting seat 11 is the limit position for the lower piston 5 to descend. By setting the elastic element, the lower piston 5 is always subjected to a downward thrust. Therefore, when the brewing cylinder 4 rises, the lower piston 5 descends relative to the brewing cylinder 4. When the lower piston 5 descends to abut against the mounting seat 11, the lower piston 5 rises relative to the brewing cylinder 4.

[0044] In a further specific embodiment, the first end of the spring is connected to the inner wall of the brewing cylinder 4, and the second end of the spring is connected to the lower end of the lower piston 5. The spring is sleeved on the lower piston 5. An installation cavity for installing the limiting mechanism 7 is provided between the lower piston 5 and the brewing cylinder 4.

[0045] By setting the installation cavity, the spring can be located between the lower piston 5 and the brewing cylinder 4. It can be understood that the cooperation of the lower piston 5 and the brewing cylinder 4 restricts the spring between the lower piston 5 and the brewing cylinder 4, so as to realize that the spring always exerts a downward thrust on the lower piston 5.

[0046] In a further specific embodiment, a liquid distribution seat 51 is provided on the top of the lower piston 5. The top of the liquid distribution seat 51 is a plane. With the flat liquid distribution seat 51, the volume in the brewing chamber 6 is larger, and more coffee powder can be placed. The structure is simple.

[0047] In a further specific embodiment, a slag scraping mechanism 8 is provided on the brewing cylinder 4. By setting the slag scraping mechanism 8, the coffee slag after brewing is cleaned.

[0048] In addition, it should be noted that the feeding mechanism for feeding coffee powder is hidden in the drawings. This structure is a prior art and will not be described in detail herein.

[0049] Embodiment 2

[0050] The coffee machine includes a brewing device. The coffee machine of this embodiment includes all the technical features and technical effects of Embodiment 1 and will not be described in detail herein.

[0051] Descriptions such as "specific examples" or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0052] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments, as long as they meet the purpose of the present utility model, they should be within the scope of protection required by the present utility model. For example: different combinations of the specific embodiments, different combinations of the different distinguishing technical features.

Claims

1. Brewing device, comprising: A frame (1), a driving main shaft (2), an upper piston (3), a brewing cylinder (4) and a lower piston (5). The driving main shaft (2) is rotatably mounted on the frame (1). The upper piston (3) is directly or indirectly fixed to the frame (1). The brewing cylinder (4) is mounted on the driving main shaft (2). The lower piston (5) is mounted in the brewing cylinder (4). Driven by the driving main shaft (2), the upper piston (3) and the lower piston (5) close the brewing cylinder (4) to form a brewing chamber (6). It is characterized in that: it includes a limiting mechanism (7). The limiting mechanism (7) is mounted on the brewing cylinder (4). The first end of the limiting mechanism (7) is connected to the brewing cylinder (4), and the second end of the limiting mechanism (7) is connected to the lower piston (5).

2. The brewing device according to claim 1, characterized in that: The limiting mechanism (7) is selected as an elastic element.

3. The brewing device according to claim 2, characterized in that: The elastic element is a spring.

4. The brewing device according to claim 3, characterized in that: The first end of the spring is connected to the inner wall of the brewing cylinder (4), and the second end of the spring is connected to the lower end of the lower piston (5).

5. The brewing device according to claim 3, characterized in that: The spring is sleeved on the lower piston (5).

6. The brewing device according to claim 1, characterized in that: An installation cavity for installing the limiting mechanism (7) is provided between the lower piston (5) and the brewing cylinder (4).

7. The brewing device according to claim 1, wherein: The frame (1) is provided with a mounting seat (11) for limiting the position of the lower piston (5). The mounting seat (11) is located below the lower piston (5).

8. The brewing device according to claim 1, characterized in that: The top of the lower piston (5) is provided with a liquid distribution seat (51), and the top of the liquid distribution seat (51) is a plane.

9. The brewing device according to claim 1, characterized in that: A slag scraping mechanism (8) is provided on the brewing cylinder (4).

10. Coffee machine, characterized in that: It includes the brewing device according to any one of claims 1-9.

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