CN213216530U - Beverage brewing device - Google Patents

Abstract

The utility model relates to a beverage brewing device, beverage brewing device includes first piston, second piston and dashes the bubble jar, first piston and second piston can close and dash the bubble jar in order to form and dash the bubble chamber, scrape the sediment piece and be used for beverage brewing device to accomplish to make the process back discharge by the ejecting beverage residue in the bubble jar of second piston, wherein, scrape the sediment piece and include the scum board, be equipped with the flexible piece on the scum board, the flexible piece is used for striking off the beverage residue. The flexible piece can compress and extend along the whole end surface of the scum board towards the side of the brewing cylinder, so that the defect that the clearance among the scum board, the brewing cylinder and the end surface of the second piston causes the unclean removal of the beverage residues such as coffee residues can be overcome.

Description

Beverage brewing device

Technical Field

The utility model relates to a beverage preparation field especially relates to a beverage brewing device.

Background

Modern beverage production includes tea beverage extraction and coffee extraction, and in the case of coffee extraction or brewing, the existing coffee brewing apparatus generally comprises an upper piston, a lower piston, and a brewing cylinder, which are axially movable relative to each other to form a closed brewing chamber. When the coffee powder pressing device is located at the filling position of the coffee brewing device, the coffee powder is filled into a cavity formed by the lower piston and the brewing cylinder, and after the coffee powder is filled, the upper end of the cavity formed by the lower piston and the brewing cylinder is sealed by the upper piston to finish the powder pressing step. Thereafter, a brew step is initiated, hot water is delivered under pressure through the coffee grounds in the brew chamber to form a coffee beverage, and the brewed coffee is injected through the outlet into a provided receptacle. The coffee powder cake or the coffee residues remained in the brewing cylinder are ejected out of the brewing cylinder by the lower piston and are conveyed to the end surface of the brewing cylinder, and the residues are scraped by manual slag discharging and blowing or a slag scraping piece on the coffee brewing device, so that the influence of the coffee residues on the next coffee brewing process is avoided.

In the prior art, there is a residue scraping member applied to the above coffee brewing apparatus, the residue scraping member is pivoted on a pivot shaft on the outer surface of a brewing cylinder, the brewing cylinder is mounted on a driving spindle of the coffee brewing apparatus through a bracket, and an initial position of the residue scraping member is located at the bracket of the brewing cylinder. During the movement of the brewing cylinder, the residue scraping element is actuated by a residue scraping element actuating element on the coffee brewing device to rotate around the brewing cylinder to discharge the coffee powder cake ejected from the brewing cylinder by the lower piston to a collecting container. The scraper is then pivoted back to the initial position with the movement of the brewing cylinder. Because a gap exists between the residue scraping piece and the surface of the lower piston and the upper edge of the brewing cylinder, the coffee powder residues are not scraped at one time when the residue scraping piece scrapes the residues outwards, and a small part of coffee residues still remain on the surface of the filter screen. When the scraping element is pivoted back again, i.e. reset, these coffee grounds residues can be carried to the bracket portion behind the brewing cylinder. Since coffee powder residues can be trapped between the rear wall of the receptacle and the rear surface of the scraping element, too much coffee powder can accumulate in this region, so that the scraping element can no longer return to its rest position, which in turn causes the scraping element to collide with the upper piston when the brewing chamber is closed, leading to a malfunction or even a damaged condition of the brewing device.

How to ensure that the residue scraping part scrapes the residue cleanly, and the residue scraping part can still stably return to the initial position after the coffee is brewed for a long time is a technical problem which needs to be solved in the field urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a beverage brewing device can effectually clear away the beverage residue such as the ground coffee residue of piston and brewing jar top surface, further can avoid when scraping the sediment piece and pivot back once more and reset promptly, and these ground coffee residues are taken to the back bracket part of brewing jar, gather too many ground coffee in this region, and what bring scrapes the sediment piece and can no longer get back to its quiescent position and initial position influences the beverage brewing process.

In order to realize the above-mentioned part or whole purpose, the utility model discloses a technical scheme is: the beverage brewing device comprises a first piston, a second piston and a brewing cylinder, wherein the first piston and the second piston can close two ends of the brewing cylinder to form a brewing chamber, the residue scraping piece is used for discharging beverage residues in the brewing cylinder after the beverage brewing device completes a brewing process, the residue scraping piece comprises a residue scraping plate, and the end, facing the brewing cylinder, of the residue scraping plate is provided with a flexible piece which is used for scraping the beverage residues. The flexible part can be compressed to make up for the defect that the clearance between the end surface of the scum board facing the brewing cylinder side and the end surface of the brewing cylinder or the second piston causes the unclean removal of the beverage residues such as coffee powder residues. Specifically, the second piston can be arranged in the brewing cylinder and can move relative to the brewing cylinder, and after the beverage brewing of the beverage brewing device is completed, the second piston ejects the beverage residues in the brewing cylinder to the end surface or above the end surface of the brewing cylinder; and the slag scraping plate and the flexible piece slide along the end surface of the second piston together to scrape slag. Of course, in other embodiments, the second piston may not be mounted within the brewing cylinder, but may be axially movable relative to the brewing cylinder independently of the brewing cylinder.

The flexible member may be a brush or a silicone member, but is not limited thereto, and may be other compressible elastic members.

In a preferred embodiment, the scraper plate may be provided with a flexible member mounting groove, and the flexible member is mounted in the flexible member mounting groove. The flexible piece can be arranged in the flexible piece mounting groove or clamped in the flexible piece mounting groove through elastic interference extrusion of the flexible piece. Of course, the flexible member may be integrally formed with the scraper bar.

In a preferred embodiment, the scraping element is pivotally mounted on a pivot axis on the outer surface of the brewing cylinder of the beverage brewing apparatus, and is pivotable about the pivot axis. Of course, in other coffee brewing devices, the scraping element is not limited to the above-described form, i.e. it is rotatably connected to the brewing cylinder, but may also be a separately arranged pivotable scraping element. The scum scraping piece comprises two pivoting rods extending towards the first piston along the side surface of the brewing cylinder, one ends of the two pivoting rods are respectively pivoted on pivoting shafts on the outer surface of the brewing cylinder, the other ends of the two pivoting rods are connected with each other through a scum scraping plate, the scum scraping plate is positioned above the end surface of the brewing cylinder facing towards the direction of the first piston, and a flexible piece on the scum scraping plate is used for discharging beverage residues on the end surface of the second piston when the scum scraping piece swings. The beverage brewing apparatus comprises means for rotating the scraper about a pivot axis at right angles to the axis of the brewing cylinder, i.e. a scraper actuating member.

In a preferred embodiment, the flexible member is distributed over the end surface of the scraper plate facing the brewing cylinder, which arrangement enables effective removal of beverage residues.

In order to achieve a reliable mounting of the flexible member, the flexible member may comprise a connecting portion and a slag scraping portion; the connecting part is clamped in the flexible piece mounting groove; the end surface of the residue scraping part extending out of the residue scraping plate and facing the brewing cylinder side is used for scraping beverage residues. The clamping connection can effectively position the flexible piece in the flexible piece mounting groove, and reliable mounting of the flexible piece is achieved.

In order to facilitate the installation and reliable connection of the flexible parts, the connection part of the flexible parts is preferably a plurality of buckle-shaped bulges, the slag scraping plate is provided with flexible part installation grooves corresponding to the bulges, and the bulges are embedded into the flexible part installation grooves corresponding to the bulges to enable the flexible parts to be clamped on the slag scraping plate.

The two pivoting rods are vertically arranged at two ends of the slag scraping plate, the end part of the slag scraping plate, facing the brewing cylinder side, is arc-shaped, and the flexible piece is arc-shaped and matched with the slag scraping plate. So as to effectively and reliably complete slag scraping.

Wherein the swing path of the end surface of the scum board facing the brewing cylinder side and the end surface of the second piston or the brewing cylinder on the side close to the scum board have matched curvatures. The end surface of the slag scraping plate facing the brewing cylinder side is a curved surface matched with the end surface of the second piston or the brewing cylinder close to the slag scraping plate side, and the flexible piece is provided with a curvature matched with the end surface of the slag scraping plate facing the brewing cylinder side. This setting can make the terminal surface and the flexible piece of scum board basically laminate and slide the second piston surface, cleanly strike off the beverage sediment.

Wherein for actuating the scraping element to swing the scraping element during the displacement of the brewing cylinder, at least one of said pivoting levers is provided with a right-angled leg near the pivoting axis, which right-angled leg can be actuated such that the scraping element rotates around the brewing cylinder and which right-angled leg can be locked to prevent the scraping element from swinging out of the desired area. In particular, the right-angled leg of the scraper may have a first leg arranged at right angles to the pivot rod and a second leg arranged perpendicular to the first leg at the end of the first leg remote from the pivot rod.

In a preferred embodiment, the beverage brewing device comprises means for axially moving the second piston relative to the brewing cylinder and means for rotating the scraping element about the axis of a pivot axis at right angles to the axis of the brewing cylinder. Preferably, the scraping element is adapted to discharge beverage residues when the second piston end surface is flush with the brewing cylinder end surface. Wherein the axis of the pivot shaft is arranged to intersect the axis of the brewing cylinder at right angles.

The beneficial effects of the utility model reside in that: the flexible piece arranged on the residue scraping plate can be compressed to make up the defect that the coffee residues cannot be cleaned completely due to the gaps among the residue scraping plate, the brewing cylinder and the end surface of the second piston, and the problem that when the residue scraping plate is pivoted back again, namely reset, the residue of coffee powder is brought to a bracket part behind the brewing cylinder, too much coffee powder is accumulated in the area, and the brought residue scraping plate can not return to the rest position, namely the initial position any more is avoided.

Drawings

Fig. 1 is a schematic view of a filling position of a coffee brewing apparatus according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the powder pressing and brewing position of the coffee brewing apparatus according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a coffee brewing apparatus according to an embodiment of the present invention, in which a lower piston is flush with an upper end surface of a brewing cylinder.

Fig. 4 is a schematic structural diagram illustrating a residue scraping process of the residue scraping member of the coffee brewing apparatus according to an embodiment of the present invention.

FIG. 5 is an isometric view of the brewing apparatus with the coffee brewing apparatus of one embodiment of the present invention in a position prior to the start of scraping the grounds by the grounds scraping device.

FIG. 6 is an isometric view of the brewing apparatus with the coffee pad of the coffee brewing apparatus of an embodiment of the present invention completely removed by the scraping member.

Fig. 7-8 are schematic views of the residue scraping member of the coffee brewing apparatus according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of a flexible member on a residue scraping member of a coffee brewing apparatus according to an embodiment of the present invention.

Fig. 10-11 are schematic views of the brewing cylinder and the residue scraping member in the residue scraping process of the coffee brewing apparatus according to the embodiment of the present invention.

Fig. 12 is a partial schematic structural view of the residue scraping member and the flexible member cooperating with the brewing cylinder and the lower piston of the coffee brewing apparatus according to the embodiment of the present invention.

Reference numerals: a frame 1, a vertical sliding surface 1a, a bottom 1 b; a drive spindle 2; the brewing cylinder 3, the brewing cylinder end surface 3a, the pivot shaft 30 and the bracket 31; an upper piston 4; a lower piston 5, a lower piston end face 5 a; the slag scraping piece 6: a pivoting lever 60, 61, a scraper plate 62, an end surface 62a of the scraper plate facing the brewing cylinder side, a flexible member mounting groove 62b, a first leg 63, a second leg 64, an actuating surface 63a, a locking surface 64a, a guide rib 65, a guide slope 65 a; the flexible member 7: a connecting portion 7a, a slag scraping portion 7 b; a coffee powder cake 8; a protrusion 9; a stopper 10; a limiting member 11; a ground coffee passage 12.

Detailed Description

The details of the invention, in particular the preferred embodiments of the invention, are further illustrated by the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are referred to only in the directions of the appended drawings. A coffee brewing apparatus is described here as an example.

Fig. 1-6 show a coffee brewing apparatus according to an embodiment of the present invention, which includes a frame 1, a driving spindle 2, a brewing cylinder 3 having a cylindrical hole, a first or upper piston 4, and a second or lower piston 5, wherein the upper and lower pistons 4 and 5 can close both ends of the brewing cylinder 3 to form a brewing chamber. In this embodiment, the upper piston 4 is mounted on the frame 1 and the lower piston 5 is axially movably mounted in the brewing cylinder 3. The frame 1 is essentially formed by a first frame and a second frame, which are spaced apart from each other by suitable spacing means, an upper and a lower bushing of a longitudinally extending drive spindle 2 serving as spacing means, the drive spindle 2 being rotatably supported on the frame 1. The brewing cylinder 3 is mounted on the driving spindle 2, the driving spindle 2 drives the brewing cylinder 3 to move relative to the upper piston 4, and the bracket 31 of the brewing cylinder 3 is provided with a threaded part which cooperates with the threads on the driving spindle 2, so that the brewing cylinder 3 carries the lower piston 5 to move along the driving spindle 2.

In this embodiment, the brewing cylinder 3 is pivotally connected to a residue scraping member 6, after brewing by the coffee brewing apparatus is completed, the lower piston 5 ejects the coffee powder residue in the brewing cylinder 3, for example, the coffee powder cake 8 in this embodiment, to the end surface or above the end surface of the brewing cylinder 3, and the residue scraping member 6 slides along the end surface of the lower piston 5 to scrape the residue. The scraping element 6 is here used for discharging the coffee cake 8 when the upper end face of the lower piston 5 is flush with the upper end face of the brewing cylinder 3, but the scraping element 6 can also be used for discharging the coffee cake 8 when the upper end face of the lower piston 5 extends a certain distance beyond the upper end face of the brewing cylinder 3. Of course, in other coffee brewing apparatuses, the scraping element is not limited to the above-described form, i.e. it is rotatably connected to the brewing cylinder, but may also be a horizontal scraping element arranged separately.

As shown in fig. 7-12, the end of the slag scraping plate 62 of the slag scraping element 6 facing the brewing cylinder 3 is provided with a flexible element 7, and together with the slag scraping plate 62 and the flexible element 7, the flexible element is used for sliding and scraping coffee powder residues from the end surface of the brewing cylinder 3 and the end surface of the lower piston 5 when the slag scraping element 6 swings. The flexible part 7 can be compressed to make up for the defect caused by the unclean removal of the coffee residues caused by the clearance between the end surface of the slag scraping plate 62 facing the brewing cylinder 3 and the end surfaces of the brewing cylinder 3 and the lower piston 5.

Referring to fig. 2 and 5, the scraping element 6 is oriented towards the first and second frame in an initial position, the scraping element 6 sliding substantially against the vertical sliding surfaces 1a of the first and second frame during the movement of the brewing cylinder. The coffee brewing apparatus comprises means for causing the second piston, the lower piston 5, to move axially relative to the brewing cylinder 3 and means for actuating the scraping means in rotation about a pivot axis at right angles to the axis of said brewing cylinder. The specific description is as follows:

the lower piston 5 and the brewing cylinder 3 are provided with upper and lower limit positions, the inner cavity of the lower piston 5 is fixedly provided with a stopper 10, the stopper 10 is matched with a limiting piece 11 on the frame 1 to realize the relative motion of the lower piston 5 and the brewing cylinder 3, and the ejection of coffee residues from the brewing chamber and the resetting of the lower piston 5 and the brewing cylinder 3 to the position for adding coffee powder by the lower piston 5 are completed.

As shown in fig. 5, 7 and 8, the residue scraping member 6 includes two pivoting rods 60 and 61 extending along the side surface or the outer surface of the brewing cylinder 3, one end of each of the two pivoting rods 60 and 61 is connected to the pivoting shaft 30 at the bottom of the brewing cylinder 3, and the pivoting shafts 30 are disposed at two sides of the bottom of the brewing cylinder. The two pivoting levers 60, 61 extend in the direction of the upper piston 4 to the upper end of the brewing cylinder 3, and the other ends of the pivoting levers 60, 61, i.e. the ends facing away from the pivoting shaft 30, are connected to each other by a scraper plate 62. The axis of the pivot shaft and the axis of the brewing cylinder are arranged in a right-angle intersection mode. Two pivoting levers are vertically disposed at both ends of the scraper plate 62, and the scraper plate 62 extends for a length corresponding to the diameter of the brew cylinder bore. The end part of the scum board, which faces the brewing cylinder 3 side, is arc-shaped, the radius of the arc-shaped is larger than that of the end surface of the lower piston 5, and the flexible part 7 is arc-shaped and matched with the end part of the scum board 62. So as to effectively and reliably complete slag scraping.

As shown in fig. 3 in combination with fig. 8 to 12, the oscillating path of the end surface 62a of the scraper bar 62 towards the brewing cylinder 3 has a matching curvature, in this embodiment substantially the same curvature, with the end surfaces 5a, 3a of the lower piston 5 and the brewing cylinder 3 on the side close to the scraper bar; further, the end surface 62a of the scraper plate 62 facing the brewing cylinder side is an arc-shaped curved surface matched with the end surfaces 5a and 3a of the lower piston 5 and the brewing cylinder 3 close to the scraper plate side, and the flexible piece 7 has a curvature matched with the end surface 62a of the scraper plate 62 facing the brewing cylinder 3 side.

The flexible piece 7 can be arranged in or clamped in the flexible piece mounting groove of the slag scraping plate 62 in an interference manner through elastic extrusion, and the flexible piece can be a flexible brush or a silica gel piece and is densely distributed between the end surface 62a of the slag scraping plate 62 facing the brewing cylinder side and the end surfaces of the brewing cylinder 3 and the lower piston 5. Of course, the flexible member 7 may be formed integrally with the scraper bar 62.

In the present embodiment, as shown in fig. 7 to 12, the scraper blade 62 is provided with a flexible member mounting groove 62 b. The flexible piece 7 comprises a connecting part 7a and a slag scraping part 7b which are integrally arranged; the connecting part 7a is clamped in the flexible piece mounting groove 62 b; the end of the residue scraping portion 7b extending out of the residue scraping plate 62 toward the brewing cylinder side is used for scraping off coffee residues. The respective flexible pieces 7 have a curvature matching the end of the scraper plate 62 toward the brewing cylinder side, and the flexible pieces 7 are mounted on the scraper plate 62. Connecting portion 7a of flexible piece can be the arch of a plurality of buckles forms, be equipped with the flexible piece mounting groove 62b that corresponds with a plurality of archs on the scum board 62, protruding embedding corresponds with it in the flexible piece mounting groove 62b for flexible piece 7 joint can be effectively fixed a position the flexible piece in the flexible piece mounting groove on scum board 62, realizes the reliable installation of flexible piece. The scraping portion 7b extends over the entire end surface 62a of the scraping plate 62 facing the brewing cylinder side, and removes the coffee powder residue remaining in the gap between the scraping plate 62 and the end surface 3a of the brewing cylinder 3 and the end surface 5a of the lower piston 5 during the swinging of the scraping element 6.

At least one pivoting lever of the scraper 6 has a right-angled leg which, together with a projection 9 on the frame 1, serves to actuate the outward swinging out of the scraper 6, pivoting the scraper. Both pivot rods in this embodiment are provided with a right-angled leg, as shown in connection with fig. 8, on the pivot rod 60 adjacent to the pivot axis, the right-angled leg having a first leg 63 and a second leg 64, the first leg 63 extending substantially at right angles to the pivot rod 60. The second leg 64 is disposed perpendicular to the first leg 63 at an end of the first leg 63 remote from the pivot rod 60. The downwardly facing surface of the first leg is an actuating surface 63 a. The actuating surface is intended to cooperate with the protrusion 9, i.e. the actuating member, for actuating the scraper member to rotate around the pivot shaft 30 when the end surface 5a of the second, lower piston 5 is flush with the end surface 3a of the brewing cylinder 3. The side of the second leg 64 remote from the pivot rod 60 is a locking surface 64a, which locking surface 64a cooperates with a locking portion, i.e. a locking member, on the frame, comprising a vertical sliding surface 1a arranged on the frame extending along the frame and parallel to the axis of the brewing cylinder and a bottom portion 1b located on the vertical sliding surface, for preventing swinging of the scraper beyond the desired area and retracting of said scraper 6. When the scraper 6 is in the initial position, i.e. the position shown in fig. 1, the locking surface 64a slides substantially snugly along the vertical sliding surface 1a, the vertical sliding surface 1a being able to prevent the swinging of the scraper 6. The slag scraping member 62 can be ejected only when the locking surface 64a extends at least partially downward beyond the bottom portion 1b of the vertical sliding surface 1 a.

The upper end surfaces of the brewing cylinder 3 and the lower piston 5, namely the end surfaces 3a and 5a are curved and matched with each other, and the curvature of the upper end surfaces of the brewing cylinder and the lower piston is matched with the slag scraping rotation path of the slag scraping plate 62.

As shown in fig. 4 and 6, during the up-and-down movement of the brewing cylinder 3, the residue scraping element 6 slides along a vertical sliding surface 1a on the frame 1 parallel to the axis of the brewing cylinder to prevent the residue scraping element 6 from swinging; during retraction of the scraper 6, the bottom 1b of the vertical sliding surface 1a of the frame 1 presses against the locking surface 64a of the leg of the scraper 6 which actuates said retraction, the locking surface 64 of the leg of the scraper again being close to the vertical sliding surface 1a of the frame 1.

A guiding rib 65 is arranged on the slag scraping part 6, and a guiding inclined surface 65a is arranged on the guiding rib and faces the upper piston 4. The guide inclined plane guides the brewing cylinder and the upper piston to the coaxial position, and the brewing cylinder, the residue scraping element and the upper piston are prevented from colliding.

The basic components are described above and the specific operation is described below.

Fig. 1 shows the filling position of the brewing apparatus, in which the brewing cylinder 3 is in the filling position, the lower piston 5 is in the lowest position of the brewing cylinder 3, i.e. the lower piston 5 is in the limit position at the lower end of the brewing cylinder 3, coffee powder is filled into the chamber formed by the lower piston 5 and the brewing cylinder 3 through the coffee powder channel 12, after the coffee powder is filled, the lower piston 5 and the brewing cylinder 3 are simultaneously driven by the driving spindle 2 to move towards the upper piston 4, the stop member 10 passes through the limit member 11 and moves upwards until the upper end of the brewing cylinder 3 is closed by the upper piston 4, and during the upward movement of the brewing cylinder 3, the residue scraping member guiding inclined surface 65a guides the brewing cylinder 3 and the upper piston 4 to the coaxial position, so as to avoid collision between the brewing cylinder 3 and the residue scraping member 6 and the upper piston 4. Fig. 2 shows the powder pressing and brewing positions of the brewing device, when the upper end of the chamber formed by the lower piston 5 and the brewing cylinder 3 is sealed by the upper piston 4, the coffee powder is pressed by the upper piston 4, namely the upper piston 4, the lower piston 5 and the brewing cylinder 3 form a sealed brewing chamber to finish the powder pressing step. Thereafter, a step of brewing coffee is initiated, hot water is delivered under pressure through the ground coffee in the brewing chamber to form a coffee beverage, and the brewed coffee is injected through the outlet into the provided capsule.

As shown in fig. 3, the lower piston 5 is then carried by the brewing cylinder 3 and pushed downwards by the driving spindle 2 to be far away from the upper piston 4, the movement of the lower piston 5 is stopped to be static when the stop piece 10 of the lower piston 5 contacts the stop piece 11 on the frame 1, the brewing cylinder 3 and the lower piston 5 move relatively, the driving spindle 2 pushes the brewing cylinder 3 downwards, the coffee cake 8 is pushed out of the brewing cylinder 3 by the lower piston 5 which is static, when the upper end face of the lower piston 5 reaches the upper edge of the brewing cylinder 3, namely the lower piston 5 is at the limit position of the upper end of the brewing cylinder 3, the lower piston 5 and the brewing cylinder 3 are driven downwards together, and the stop piece 10 passes through the stop piece 11.

During this displacement, as shown in figure 4, the scraping element 6, which is located between the brewing cylinder 3 and the bracket 31 and is rotationally connected to the brewing cylinder 3, is activated by the projection 9 on the frame 1, i.e. the actuating surface 63a of the first leg 63 comes into contact with the top of the projection 9, while the locking surface 64a of the second leg 64 extends at least partially downwards beyond the bottom 1b of the vertical sliding surface below the bottom 1b of the vertical sliding surface, the scraping element 6 is swung over the upper surface of the brewing cylinder 3 and the upper surface of the lower piston 5, thereby peeling off the cake of coffee 8 located there into the collection container, and the locking surface 64a of the second leg 64 of the scraping element 6 extends to the bottom 1b below the vertical sliding surface 1a on the frame 1 and is locked until the brewing cylinder 3 has run to the lowermost end of the brewing device, whereupon the action of scraping against the grounds is completed. During the scraping process, the scraping plate 62 slides over the upper surfaces of the brewing cylinder 3 and the lower piston 5, as shown in fig. 10-11, during which the scraping portion of the flexible member 7 on the scraping plate 62 can fill the gap between the sliding surface 62a of the scraping plate and the upper surfaces of the brewing cylinder 3 and the lower piston 5 together with the scraping plate for discharging the coffee powder residue, effectively removing the coffee powder residue.

Then, when the brewing cylinder 3 is driven by the main driving shaft 2 to move upwards, the residue scraping piece 6 swings back to the initial position, namely, is parallel to the vertical sliding surface 1a of the frame, in the process, the locking surface 64a of the second leg 64 is pressed by the bottom 1b of the vertical sliding surface 1a on the frame 1 to be actuated and return to the original rest position, and the flexible piece 7 assists the residue scraping plate 62 to scrape the coffee powder remained on the upper end surfaces of the lower piston 5 and the brewing cylinder 3 back to the rear wall of the bracket part in the process that the residue scraping piece 6 pivots back again, namely, returns, preferably, the coffee powder residues remained on the upper end surfaces of the lower piston 5 and the brewing cylinder 3 are sent to the hollowed-out channel of the bracket 31 by the residue scraping plate 62 and the flexible piece 7. The brewing device is returned to the filling position and the locking surface 64a finally stops again substantially close to the vertical sliding surface 1 a. The projections 9 and the vertical sliding surfaces 1a are staggered parallel to each other in the longitudinal direction of the brewing device. Then, the top of the projecting portion 9 does not overlap with the bottom portion 1b of the vertical sliding face 1 a.

So far, the whole set of actions of filling, powder pressing, coffee making, residue pushing, residue scraping and piston lower resetting of the brewing device are completed.

The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions, transformations or combinations to some technical features without creative labor, and these substitutions, transformations or combinations are all within the protection scope of the present invention.

Claims (12)

1. A beverage brewing apparatus comprising a first piston, a second piston, a brewing cylinder and a slag scraping element, wherein the first piston and the second piston can close two ends of the brewing cylinder to form a brewing chamber, and the slag scraping element is used for discharging beverage residues in the brewing cylinder after the beverage brewing apparatus completes a brewing process, and the beverage brewing apparatus is characterized in that: the residue scraping piece comprises a residue scraping plate, a flexible piece is arranged at the end part of the residue scraping plate facing the brewing cylinder side, and the flexible piece is used for scraping beverage residues.

2. The beverage brewing apparatus of claim 1, wherein: the second piston is arranged in the brewing cylinder and can move relative to the brewing cylinder, and after the brewing of the beverage brewing device is completed, the second piston ejects the beverage residues in the brewing cylinder to the end surface or above the end surface of the brewing cylinder; and the slag scraping plate and the flexible piece slide along the end surface of the second piston together to scrape slag.

3. The beverage brewing apparatus of claim 1 or 2, wherein: the flexible part is a hairbrush or a silica gel part.

4. The beverage brewing apparatus of claim 1 or 2, wherein: and a flexible piece mounting groove is formed in the slag scraping plate, and the flexible piece is mounted in the flexible piece mounting groove.

5. The beverage brewing apparatus of claim 4, wherein: the residue scraping piece is pivoted on a pivot shaft on the outer surface of the brewing cylinder and can swing around the pivot shaft; the slag scraping piece comprises two pivoting rods extending towards the first piston direction along the outer surface of the brewing cylinder, one ends of the two pivoting rods are respectively pivoted on pivoting shafts on the outer surface of the brewing cylinder, the other ends of the two pivoting rods are mutually connected through a slag scraping plate, the slag scraping plate is positioned above the end surface of the brewing cylinder facing towards the first piston direction, and the flexible piece on the slag scraping plate is used for discharging beverage residues on the end surface of the second piston when the slag scraping piece swings.

6. The beverage brewing apparatus of claim 5, wherein: the flexible piece comprises a connecting part and a slag scraping part; the connecting part is clamped in the flexible piece mounting groove; the end of the residue scraping part extending out of the residue scraping plate and facing the brewing cylinder side is used for scraping away beverage residues.

7. The beverage brewing apparatus of claim 6, wherein: the connecting portion of flexible piece are the arch of a plurality of buckle forms, be equipped with the flexible piece mounting groove that corresponds with a plurality of archs on the scum board, protruding embedding makes the flexible piece joint on the scum board in the flexible piece mounting groove that corresponds with it.

8. The beverage brewing apparatus of claim 5, wherein: the two pivoting rods are vertically arranged at two ends of the slag scraping plate, the end part of the slag scraping plate, facing the brewing cylinder side, is arc-shaped, and the flexible piece is arc-shaped and matched with the end part of the slag scraping plate.

9. The beverage brewing apparatus of claim 8, wherein: the swing path of the end surface of the scum board facing the brewing cylinder side and the end surface of the second piston or the brewing cylinder on the side close to the scum board have matched curvatures.

10. The beverage brewing apparatus of claim 9, wherein: at least one of said pivoting levers has a right-angled leg extending adjacent the pivot axis, the right-angled leg being actuatable to cause the scraper to swing about the brewing cylinder and the right-angled leg being lockable to prevent the scraper from swinging out of a desired area, the right-angled leg having a first leg at a right angle to the pivoting lever and a second leg disposed perpendicular to the first leg at an end of the first leg remote from the pivoting lever.

11. The beverage brewing apparatus of claim 5, wherein: the beverage brewing device comprises means for causing an axial relative movement of the second piston with respect to the brewing cylinder and means for rotating the scraping element about the axis of a pivot axis at right angles to the axis of the brewing cylinder.

12. The beverage brewing apparatus of claim 11, wherein: the axis of the pivot shaft and the axis of the brewing cylinder are arranged in a right-angle intersection mode.

Images