Beverage machine brewing device

Abstract

The utility model relates to the technical field of beverage dispensers, in particular to a beverage dispenser brewing device which solves the problems that a water inlet structure of an existing brewing device is inconvenient to install, prone to damage and high in cost. The problems of poor quality of drinks on the liquid outlet structure and inconvenience in maintenance are solved; a lower opening of a water inlet channel on the lower hammer head is communicated with a hot water pipe; a detachable filter screen is arranged on the hammer face of the upper hammer head, the lower section of the water inlet channel is provided with internal threads and a quick-inserting pipe connector comprising an upper connector and a lower connector, the upper connector is screwed on the lower hammer head to enable an inner cavity of the quick-inserting pipe connector to be communicated with the water inlet channel, and a hot water pipe is sleeved on the lower connector and inserted on the upper connector along with the lower connector. External threads are arranged on the periphery of the lower section of the upper hammer head, the filter cover assembly comprises a threaded ring and a filter screen, the upper section of the threaded ring is an internal thread part screwed with the external threads of the upper hammer head, the lower section of the threaded ring is a filter screen fixing part for fixing the filter screen, the filter screen fixing part is provided with a sinking table inwards from the outer end face, and the filter screen outer ring is pressed on a step of the sinking table of the filter screen fixing part and is connected with the threaded ring in a welded mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of beverage machine, especially a beverage machine brewing device. BACKGROUND

[0002] The residue beverage brewing device, such as the brewing device using coffee powder and tea powder, is relatively complex in structure because it needs to realize the actions of powder feeding, water feeding, liquid discharging, residue pressing and residue discharging. The main working parts of the brewing device include an upper hammer head, a brewing cylinder and a lower hammer head, etc. The upper and lower hammer heads can also be referred to as upper and lower pistons. The brewing cylinder can be sleeved on the upper hammer head and the lower hammer head at the same time. Hot water enters the brewing cylinder from the lower hammer head in one direction. At the same time when the upper and lower hammer heads are close to each other, the brewed beverage is squeezed to flow out from the upper hammer head. Generally, the upper hammer head slides in the brewing cylinder in the form of a piston. The lower hammer head can also slide in the brewing cylinder in the form of a piston to push out the residue cake. Alternatively, the lower hammer head can be stationary, and the residue cake is pushed out by a residue pushing rod which is slidably arranged at the position of the axis of the lower hammer head.

[0003] An existing structure is shown in the piston structure of a coffee machine brewing unit disclosed in Chinese Patent Publication No. CN212368800U. The water feeding structure of the lower hammer head is shown in the accompanying drawing of the document. Figure 1 The liquid discharging structure of the upper hammer head is shown in the accompanying drawing of the document. Figure 2 .

[0004] I. In terms of the water feeding structure of the lower hammer head, the upper end of the hot water pipe is wrapped by a copper sleeve with a protruding ring. A sealing ring is sleeved on the copper sleeve. The lower hammer head is provided with a counterbore. The large hole of the counterbore is at the lower part, and the small hole is at the upper part. The copper sleeve carries the hot water pipe to extend into the small hole from the large hole. The sealing ring is placed on the step of the counterbore. The fixing of the copper sleeve is realized by a pressing block. The pressing block is fixed in the inner cavity of the lower hammer head by a self-tapping screw. The disadvantages of this structure are as follows: 1. High cost: the pressing block needs to be separately molded; 2. Installation is troublesome: due to the influence of the hot water pipe, it is difficult to align the counterbore of the lower hammer head when the pressing block presses the copper sleeve. The installation process is time-consuming; 3. Easy to damage: the pressing block is fixed by a self-tapping screw. Since the extraction pressure can block the water inlet with residue, the hot water pipe needs to be cleaned or replaced. Therefore, after being disassembled for several times, the self-tapping screw hole is prone to slipping.

[0005] II. In terms of the liquid discharging structure of the upper hammer head, the filter screen is detachably fixed to the end of the piston body by a fixing ring. A first annular groove is formed on the outer peripheral surface of the end of the piston body. A protrusion is formed on the inner peripheral surface of the fixing ring and is clamped into the first annular groove. The disadvantages of this structure are as follows: 1. Affecting the quality of the beverage: a right-angle step can be formed between the pressing ring of the fixing ring and the filter screen. The existence of the step can cause coffee residue or tea residue to be left after the coffee or tea extraction is completed, which can breed bacteria and affect the flavor of the next cup of beverage; 2. Inconvenient to repair: when the filter screen is blocked, the filter screen cannot be quickly disassembled for cleaning or replacement. The fixing ring is also prone to damage. Utility model content

[0006] The utility model solves the technical problem that: provide a beverage machine brewing ware, overcome the problem of inconvenient installation, easy to damage and high cost of the existing brewing ware water inlet structure, and overcome the problem of poor beverage quality and inconvenient product maintenance of the liquid outlet structure.

[0007] The utility model discloses a beverage machine brewing ware, with lower hammer head, upper hammer head and brewing jar, when the brewing jar is simultaneously sleeved on lower hammer head and upper hammer head, forms brewing cavity between lower hammer head and upper hammer head, is equipped with the vertical water inlet channel on lower hammer head, and the upper mouth of water inlet channel is connected with brewing cavity, and the lower mouth is connected with hot water pipe, is equipped with detachable filter screen on the upper hammer head surface of upper hammer head, and upper hammer head has liquid outlet channel,

[0008] The structure that water inlet channel communicates with hot water pipe is that the lower segment of water inlet channel on lower hammer head has internal thread, has quick plug pipe joint including upper joint and lower joint, the upper joint has outer thread connection portion, the upper joint is screwed on lower hammer head to make the inner chamber of quick plug pipe joint communicate with water inlet channel, and the hot water pipe is sleeved on lower joint and is inserted on upper joint with lower joint,

[0009] The detachable structure of filter screen and upper hammer head is that the outer periphery of lower segment of upper hammer head is equipped with external thread, has filter cover assembly, the filter cover assembly includes thread ring and filter screen, the thread ring is circular, the upper segment of thread ring is the internal thread portion that is rotated with the external thread of upper hammer head, and the lower segment is filter screen fixed part that fixes filter screen, the filter screen fixed part has sunken platform from the outer end face to the inside, the filter screen is circular, and the outer ring of filter screen is pressed on the step of filter screen fixed part sunken platform and is welded with thread ring.

[0010] Specifically, because the internal thread of water inlet channel is located on the cavity end wall of lower hammer head, in order to process conveniently, and in order to facilitate the strength of internal thread, the internal thread of water inlet channel is the internal thread of embedded nut that is integrated with lower hammer head injection.

[0011] Specifically, in order to improve the airtightness between quick plug pipe joint and water inlet channel, the end face similar to embedded nut of lower joint is equipped with sealing gasket.

[0012] Specifically, in order to facilitate the installation of sleeve, the screwing-in portion of upper joint is hexagonal prism in shape.

[0013] Specifically, in order to not form residual accumulation, the distance between the outer end face of filter screen and the outer end face of filter screen fixed part is 0-0.2 millimeters.

[0014] Specifically, in order to make the filter screen and the threaded ring firmly welded, the filter screen has a non-hole welding area in the form of an outer ring and a hole filtering area inside the outer ring.

[0015] Specifically, the threaded ring is a metal threaded ring, and the filter screen is a metal filter screen, which is laser-welded to the threaded ring on the stepped surface of the sink and / or the inner circumferential surface of the sink of the filter screen fixing part.

[0016] Specifically, also in order to avoid residue accumulation, the outer diameter of the filter screen is 0.01-0.2 mm smaller than the sink hole diameter of the filter screen fixing part.

[0017] Specifically, the filter screen has a double-layer structure, including an inner filter screen with larger filter holes and a thicker thickness and an outer filter screen with smaller filter holes and a thinner thickness.

[0018] The utility model discloses an improved structure of the water inlet and liquid outlet of the existing brewing device, which has the following effects:

[0019] I. The brewing device has a lower cost and fewer required machining parts in the water inlet structure, and the fast plug connector can be purchased externally. The brewing device is easy to install, and only needs to screw the threaded upper connector of the sleeve into the lower hammer head water inlet channel and plug the lower connector. The threaded fast plug connector has higher strength, and the threaded fast plug connector is screwed into the nut instead of being screwed into the self-tapping screw, so that the threaded fast plug connector does not damage the lower hammer head when being disassembled.

[0020] II. The brewing device has a simple process in the liquid outlet structure, and only needs to screw the machined filter cover assembly and the upper hammer head. The brewing device reduces the influence of residue on the quality of the beverage, because the filter screen and the threaded ring are combined into the filter cover assembly on the end surface of the threaded ring, which reduces the influence of the accumulation of residue on the step and does not breed bacteria and has more stable cup quality. If the filter screen is blocked, only needs to unscrew the filter cover assembly for cleaning, so that the brewing device is easy to maintain. DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0022] Figure 1 It is the perspective view of the utility model;

[0023] Figure 2 It is the sectional view of the utility model;

[0024] Figure 3 It is the sectional view of the lower hammer head water inlet structure;

[0025] Figure 4 is a cross-sectional view of the upper hammer head liquid outlet structure;

[0026] Figure 5 is Figure 4 an enlarged view of A of

[0027] In the figure: 1, lower hammer head, 1-1, water inlet channel, 2, upper hammer head, 2-1, liquid outlet channel, 3, brewing cylinder, 4, hot water pipe, 5, filter screen, 5-1, inner filter screen, 5-2, outer filter screen, 6, upper connector, 7, lower connector, 8, threaded ring, 8-1, inner threaded part, 8-2, filter screen fixing part, 9, embedded nut, 10, sealing gasket, 11, powder falling hopper, 12, slag stirring rod. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0029] The drawings Figure 1 is a perspective view of the brewing device, the upper hammer head 2 fixed between the two side plates is blocked by the powder falling hopper 11, the drawings Figure 2 is a cross-sectional view of the brewing device, the upper hammer head 2 fixed on the bracket is static, the powder falling hopper 11 makes swinging movement, the lower hammer head 1 is located in the brewing cylinder 3, the brewing cylinder 3 makes lifting movement, the lower hammer head 1 has a process of keeping static when the brewing cylinder 3 lifts and also has a process of lifting together with the brewing cylinder 3, hot water is injected into the brewing cylinder 3 from the lower hammer head 1, the brewed beverage is pressed out from the upper hammer head 2, when the brewing cylinder 3 drops to the lowest point, the slag cake is stirred and dropped by the slag stirring rod 12.

[0030] When the brewing cylinder 3 is simultaneously sleeved on the lower hammer head 1 and the upper hammer head 2, a brewing cavity is formed between the lower hammer head 1 and the upper hammer head 2, the structure at the lower hammer head 1 is shown in Figure 3, the lower hammer head 1 is provided with a vertical water inlet channel 1-1, the upper opening of the water inlet channel 1-1 is communicated with the brewing cavity, and the lower opening is communicated with the hot water pipe 4; the structure that the water inlet channel 1-1 is communicated with the hot water pipe 4 is that the lower section of the water inlet channel 1-1 has an internal thread, the quick plug pipe joint comprising an upper joint 6 and a lower joint 7, the upper joint 6 has an external thread connection part, the upper joint 6 is screwed on the lower hammer head 1, so that the inner cavity of the quick plug pipe joint is communicated with the water inlet channel 1-1, the hot water pipe 4 is sleeved on the lower joint 7 and is inserted on the upper joint 6 with the lower joint 7; the internal thread of the water inlet channel 1-1 is the internal thread of the embedded nut 9 which is integrally molded with the lower hammer head 1, the end face close to the embedded nut 9 of the lower joint 7 is provided with a sealing gasket, the screwed-in part of the upper joint 6 is hexagonal in shape, and the insertion structure between the upper joint 6 and the lower joint 7 of the quick plug pipe joint is prior art.

[0031] The structure at the upper hammer head 2 is shown in Figure 4 The upper hammer head 2 is provided with a detachable filter screen 5 on the hammer face, the upper hammer head 2 has a liquid outlet channel 2-1, and the hammer face of the upper hammer head 2 is integrally distributed with support protrusions for supporting the detachable filter screen 5, the gaps between adjacent support protrusions are communicated with the mesh holes of the filter screen 5 and the liquid outlet channel 2-1, and the detachable structure of the filter screen 5 and the upper hammer head 2 is combined with Figure 5 The outer periphery of the lower section of the upper hammer head 2 is provided with an external thread, and the upper hammer head 2 has a filter cover assembly, the filter cover assembly comprises a threaded ring 8 and the filter screen 5, the threaded ring 8 is a circular ring, the upper section of the threaded ring 8 is an internal thread part 8-1 which is screwed with the external thread of the upper hammer head 2, and the lower section is a filter screen fixing part 8-2 for fixing the filter screen 5, the filter screen fixing part 8-2 has a sunken platform from the outer end face, the filter screen 5 is a circular sheet, the outer ring of the filter screen 5 is pressed on the step of the sunken platform of the filter screen fixing part 8-2 and is welded with the threaded ring 8, the distance between the outer end face of the filter screen 5 and the outer end face of the filter screen fixing part 8-2 is 0-0.2 mm, the outer end face of the filter screen 5 should be flush with the outer end face of the filter screen fixing part 8-2, but due to manufacturing errors, the height error is allowed to be not more than 0.2 mm, the filter screen 5 has a non-porous welding area of the outer ring and a porous filtering area in the outer ring, the threaded ring 8 is a metal threaded ring, the filter screen 5 is a metal filter screen, the threaded ring 8 and the filter screen 5 can be made of stainless steel, the filter screen 5 is laser welded with the threaded ring 8 on the step surface and / or the inner periphery surface of the sunken platform of the filter screen fixing part 8-2, the outer surface after welding can be polished, the outer diameter of the filter screen 5 is 0.01-0.2 mm smaller than the hole diameter of the sunken platform of the filter screen fixing part 8-2, and the filter screen 5 has a double-layer structure, comprising an inner filter screen 5-1 with larger filter holes and greater thickness and an outer filter screen 5-2 with smaller filter holes and thinner thickness.

[0032] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A beverage machine brewing device, comprising a lower hammer head (1), an upper hammer head (2) and a brewing cylinder (3), the brewing cylinder (3) forming a brewing cavity between the lower hammer head (1) and the upper hammer head (2) when it is sleeved on the lower hammer head (1) and the upper hammer head (2) simultaneously, the lower hammer head (1) being provided with a vertical water inlet channel (1-1), the upper opening of the water inlet channel (1-1) being communicated with the brewing cavity and the lower opening being communicated with a hot water pipe (4), the upper hammer head (2) being provided with a detachable filter screen (5) on the hammer surface, and the upper hammer head (2) being provided with a liquid outlet channel (2-1), characterized in that: the structure for the water inlet channel (1-1) to communicate with the hot water pipe (4) is that the lower section of the water inlet channel (1-1) is provided with an internal thread, a quick plug pipe joint comprising an upper joint (6) and a lower joint (7) is provided, the upper joint (6) is provided with an external thread connection part, the upper joint (6) is screwed on the lower hammer head (1) to make the internal cavity of the quick plug pipe joint communicated with the water inlet channel (1-1), and the hot water pipe (4) is sleeved on the lower joint (7) and is inserted on the upper joint (6) with the lower joint (7); the detachable structure of the filter screen (5) and the upper hammer head (2) is that the outer periphery of the lower section of the upper hammer head (2) is provided with an external thread, a filter cover assembly is provided, the filter cover assembly comprises a threaded ring (8) and the filter screen (5), the threaded ring (8) is a circular ring, the upper section of the threaded ring (8) is an internal thread part (8-1) which is screwed with the external thread of the upper hammer head (2), and the lower section is a filter screen fixing part (8-2) which fixes the filter screen (5), the filter screen fixing part (8-2) is provided with a sunken platform from the outer end surface to the inner end surface, the filter screen (5) is a circular sheet, and the outer ring of the filter screen (5) is pressed on the step of the sunken platform of the filter screen fixing part (8-2) and is welded with the threaded ring (8). The internal thread of the water inlet channel (1-1) is the internal thread of an embedded nut (9) which is integrated with the lower hammer head (1) by injection molding. The lower joint (7) is provided with a sealing gasket on the end surface close to the embedded nut (9).

2. A beverage maker brewer according to claim 1, characterized in that: The screwed-in part of the upper joint (6) is hexagonal in shape.

3. A beverage maker brewer according to claim 2, wherein: The distance between the outer end surface of the filter screen (5) and the outer end surface of the filter screen fixing part (8-2) is 0-0.2 mm.

4. A beverage maker brewer according to claim 1, wherein: The filter screen (5) is provided with a non-porous welded area in the outer ring and a porous filtering area in the inner ring.

5. A beverage maker brewer according to claim 1, wherein: The threaded ring (8) is a metal threaded ring, the filter screen (5) is a metal filter screen, and the filter screen (5) is laser welded with the threaded ring (8) on the step surface and / or the inner peripheral surface of the sunken platform of the filter screen fixing part (8-2).

6. A beverage maker brewer according to claim 1, wherein: The outer diameter of the filter screen (5) is 0.01-0.2 mm smaller than the aperture of the sunken platform of the filter screen fixing part (8-2).

7. A beverage maker brewer according to claim 1, wherein: The filter screen (5) is double-layered, comprising an inner filter screen (5-1) with larger filter holes and greater thickness and an outer filter screen (5-2) with smaller filter holes and smaller thickness.

8. A beverage maker brewer according to claim 1, wherein: ​ 9. A beverage maker brewer according to claim 1, wherein: ​

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