Beverage dispenser

Abstract

This invention provides a beverage extractor that eliminates the insufficient extraction effect of conventional extractors while simultaneously offering a unique pressure-holding structure for the brewing chamber. [Solution] The beverage dispenser includes a piston and a brewing cylinder 1 below the piston. The piston is airtightly inserted into the brewing cylinder to form a brewing chamber. The piston includes a main body member 3, an operating part 4, and a pressure holding assembly 5. The operating part is detachably fixed to the main body member. The operating part has a cylindrical body that is slidably fitted into the inner wall of the brewing cylinder and a sealing ring. The main body member is provided with a liquid discharge passage. The pressure holding assembly opens the communication between the brewing chamber and the liquid discharge passage when the pressure in the brewing chamber exceeds a set pressure, and closes the communication between the brewing chamber and the liquid discharge passage when the pressure falls below the set pressure.

Description

Technical Field

[0001] This utility model relates to the technical field of beverage manufacturing equipment, particularly to beverage extractors.

Background Art

[0002] Various beverage extractors are generally similar in principle, all using the relative displacement between the piston and the brewing cylinder to achieve compression and extraction, but their structures are significantly different. The main differences include the driving mode and the residue discharge mode, and the minor differences include the water intake structure and the liquid discharge structure.

[0003] Generally, warm water is introduced into the brewing cylinder of the extractor, and the extracted beverage flows out from the piston. Chinese Patent Publication No. 102083346 discloses a "beverage brewing device". Regarding the liquid discharge structure of the piston, the piston head has two positional relationships with respect to the piston body, namely, a protruding position and a retracted position. A three-way valve is provided on the piston body. The protrusion and retraction of the piston head operate the valve core of the three-way valve to open the communication between the brewing chamber and both the external atmosphere and the liquid discharge port, or to open only the communication between the brewing chamber and the liquid discharge port. The main purpose of providing such a complex structure is to communicate the liquid discharge passage with the atmosphere near the end of beverage discharge, thereby reducing the residual liquid in the passage. However, this structure also has significant drawbacks. First, since liquid outflow is opened as soon as the piston fits into the brewing cylinder, high pressure cannot be established in the brewing cylinder, high-pressure extraction of the pack cannot be achieved, and the extraction effect becomes insufficient. Second, both a movable head and a three-way valve are provided on the piston, complicating the piston structure and causing inconvenience in manufacturing, cleaning, and maintenance.

Prior Art Documents

Patent Documents

[0004] [Patent Document 1] China Patent Publication No. CN102083346A [Overview of the project] [Problems that the invention aims to solve]

[0005] The technical problem to be solved by this utility model is to provide a beverage extractor that eliminates the insufficient extraction effect of conventional extractors while simultaneously providing a unique pressure-holding structure for the brewing chamber. [Means for solving the problem]

[0006] The technical solutions adopted by this utility model to solve the technical problems are as follows: A beverage extractor comprising a piston and a brewing cylinder, wherein the piston is airtightly inserted into the brewing cylinder to form a brewing chamber within the brewing cylinder, and the piston is provided with a liquid dispensing structure for dispensing a beverage, wherein the piston comprises a main body member, an operating part, and a pressure holding assembly, the operating part being detachably fixed to the main body member, the operating part having a cylindrical body slidably fitted into the inner wall of the brewing cylinder and a seal ring fitted onto the cylindrical body, the main body member being provided with a liquid dispensing passage, the pressure holding assembly being attached to the operating part and / or the main body member, the pressure holding assembly opening communication between the brewing chamber and the liquid dispensing passage when the pressure in the brewing chamber exceeds a set pressure, and closing communication between the brewing chamber and the liquid dispensing passage when the pressure falls below the set pressure,

[0007] Specifically, the axis of the pressure-holding assembly is parallel to the axis of the cylindrical body of the operating part, and the pressure-holding assembly includes a coaxially arranged pressure-holding seat, a pressure-holding core, a spring, and a pressure-holding cover, the pressure-holding seat is attached to the operating part and exposed at the lower end surface of the cylindrical body, the pressure-holding seat is a cup-shaped body having a bottom with a first liquid discharge hole, the spring and pressure-holding core are arranged in the cavity of the pressure-holding seat, the pressure-holding cover is screwed into the upper opening of the pressure-holding seat, the spring pushes down and presses the pressure-holding core downward and seals the upper opening of the first liquid discharge hole, the set pressure is the pressing force applied to the pressure-holding core by the spring, the pressure-holding cover is provided with a second liquid discharge hole that communicates with the cavity of the pressure-holding seat, the second liquid discharge hole connects the cavity of the pressure-holding seat to the liquid discharge passage.

[0008] Specifically, in order to improve sealing performance, the surface of the pressure-holding core that contacts the upper opening of the first liquid discharge hole is a spherical arc surface, and guide grooves for directing the beverage upward are formed on the peripheral edge of the pressure-holding core.

[0009] Specifically, the operating parts are provided with mounting holes, and the pressure-retaining seats are fitted tightly into the mounting holes.

[0010] Specifically, the pressure-holding cover is airtightly inserted into the main body of the piston, connecting the lumen of the pressure-holding seat to the liquid discharge passage.

[0011] Specifically, a filter screen is provided below the first liquid intake port, covering the lower end surface of the working component. [Effects of the Invention]

[0012] The beverage dispenser of this utility model has the following beneficial effects. Firstly, by providing a pressure-holding assembly on the piston, the beverage can only flow out after overcoming the set pressure, and extraction under pressure can improve the extraction results. Secondly, the pressure-holding seat of the pressure-holding assembly is crimped onto a detachable operating part from the main body member, and as a result, adding the pressure-holding assembly does not cause additional leakage problems. Rotating the pressure-holding cover facilitates adjustment of the set pressure, and adding a pressure adjustment function does not cause additional leakage problems. Finally, the piston with the added pressure-holding assembly remains relatively simple and compact in structure, making manufacturing, cleaning, and maintenance convenient.

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings necessary for use in describing the embodiments or the prior art are briefly introduced below. Clearly, the drawings described below are only a few of the embodiments documented in this application. Those skilled in the art can obtain other drawings based on these without any creative effort. [Brief explanation of the drawing]

[0014] [Figure 1] This is an exploded view of the utility model. [Figure 2] This is an enlarged view of section A in Figure 1. [Figure 3] This is a cross-sectional view of a portion of the piston and brewing cylinder of this utility model, along the axis. [Modes for carrying out the invention]

[0015] To further clarify the purpose, technical solution, and advantages of the embodiments of this utility model, the technical solution in the embodiments of this utility model will be described below clearly and completely with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the embodiments described are not all but part of the embodiments of this utility model. All other embodiments that can be obtained by those skilled in the art without creative effort based on the embodiments of this utility model will fall within the scope of the protection of this utility model.

[0016] Figure 1 is an exploded view of a beverage dispenser. The beverage dispenser has many components. The improvement of this utility model lies in the liquid discharge structure on the piston, in particular in the provision of a pressure holding assembly 5 on the piston, so the composition and assembly structure of the pressure holding assembly 5 are shown in Figures 2 and 3. As shown in Figure 3 in conjunction with Figure 2, the beverage dispenser includes a piston and a brewing cylinder 1 located below the piston, wherein the piston is airtightly inserted into the brewing cylinder 1 to form a brewing chamber 2 within the brewing cylinder 1, and the piston is provided with a liquid discharge structure for discharging beverages, and the piston includes a main body member 3, an operating part 4, and a pressure holding assembly 5, wherein the operating part 4 is detachably fixed to the main body member 3, and the operating part 4 is attached to the brewing cylinder The brewing chamber 2 has a cylindrical body 4-1 that can be slidably fitted into the inner wall of the dent 1, and a seal ring 4-2 fitted onto the cylindrical body 4-1. The main body member 3 is provided with a liquid discharge passage 3-1, and a pressure holding assembly 5 is attached to the operating part 4 and the main body member 3 (the method of attachment will be described below). The pressure holding assembly 5 opens the communication between the brewing chamber 2 and the liquid discharge passage 3-1 when the pressure in the brewing chamber 2 exceeds the set pressure, and closes the communication between the brewing chamber 2 and the liquid discharge passage 3-1 when the pressure falls below the set pressure.

[0017] Referring further to FIGS. 2 and 3, the axis of the pressure holding assembly 5 is parallel to the axis of the cylindrical body 4-1 of the actuating part 4. The pressure holding assembly 5 includes a coaxially arranged pressure holding seat 5-1, a pressure holding core 5-2, a spring 5-3, and a pressure holding cover 5-4. The pressure holding seat 5-1 is attached to the actuating part 4 and is exposed at the lower end surface of the cylindrical body 4-1. The pressure holding seat 5-1 is a cup-shaped body having a bottom provided with a first liquid discharge hole 5-1-1. The spring 5-3 and the pressure holding core 5-2 are arranged in the inner cavity of the pressure holding seat 5-1. The spring 5-3 is a compression coil spring. The pressure holding cover 5-4 is screwed into the upper opening of the pressure holding seat 5-1, pressing down the spring 5-3 and pressing the pressure holding core 5-2 downward to seal the upper opening of the first liquid discharge hole 5-1-1. The pressure holding cover 5-4 is provided with an external thread, and the pressure holding seat 5-1 is provided with an internal thread. The set pressure is the pressing force applied to the pressure holding core 5-2 by the spring 5-3. The pressure holding cover 5-4 is provided with a second liquid discharge hole 5-4-1 communicating with the inner cavity of the pressure holding seat 5-1. The second liquid discharge hole 5-4-1 communicates the inner cavity of the pressure holding seat 5-1 with the liquid discharge passage 3-1.

[0018] The surface of the pressure holding core 5-2 that contacts the upper opening of the first liquid discharge hole 5-1-1 is a spherical arc surface. A diversion groove 5-2-1 for flowing the beverage upward is formed at the peripheral portion of the pressure holding core 5-2.

[0019] The attachment of the pressure holding assembly 5 to the actuating part 4 and the body member 3 is embodied as follows. First, an attachment hole is provided in the actuating part 4, and the pressure holding seat 5-1 is press-fitted into the attachment hole. Next, the pressure holding cover 5-4 is airtightly inserted into the body member 3 of the piston to communicate the inner cavity of the pressure holding seat 5-1 with the liquid discharge passage 3-1.

[0020] In another aspect, a filter screen 6 covering the lower end surface of the actuating part 4 is provided below the first liquid suction hole 5-1-1.

[0021] The set pressure of this utility model is adjustable. After removing the piston's moving part 4 from the main body member 3, by rotating the pressure holding cover 5-4, the compression amount of the spring 5-3 is changed, thereby adjusting the pressure applied to the pressure holding core 5-2 by the spring 5-3. When the pressure holding cover 5-4 is rotated upward, the set pressure decreases, while when the pressure holding cover 5-4 is rotated downward, the set pressure increases.

[0022] During the extraction and use of this utility model, after the beverage flows upward into the filter screen 6, when the pressure in the brewing chamber 2 rises to the set pressure, the beverage presses the pressure holding core 5-2 upward through the first liquid discharge hole 5-1-1. Then, the beverage enters the inner cavity of the pressure holding seat 5-1 and then flows out through the second liquid discharge hole 5-4-1 and the liquid discharge passage 3-1.

[0023] This utility model can be used for extracting coffee, tea, etc.

[0024] The above description is only a preferred specific embodiment of this utility model, and the protection scope of this utility model is not limited thereto. Based on the technical solution and utility model concept of this utility model, equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed by this utility model shall fall within the protection scope of this utility model.

Description of Reference Numerals

[0025] 1 Brewing cylinder 2 Brewing chamber 3 Main body member 3-1 Liquid discharge passage 4 Moving part 4-1 Cylindrical body 4-2 Seal ring 5 Pressure holding assembly 5-1 Pressure holding seat 5-1-1 First liquid discharge hole 5-2 Pressure holding core 5-2-1 Flow guiding groove 5-3 Spring 5-4 Pressure-retaining cover 5-4-1 Second liquid discharge port 6 Filter Screen

Claims

1. A beverage dispenser comprising a piston and a brewing cylinder (1) located below the piston, wherein the piston is airtightly inserted into the brewing cylinder (1) to form a brewing chamber (2) within the brewing cylinder (1), and the piston is provided with a liquid dispensing structure for dispensing a beverage, wherein the piston comprises a main body member (3), an operating part (4), and a pressure holding assembly (5), the operating part (4) being detachably fixed to the main body member (3), and the operating part (4) being slidable against the inner wall of the brewing cylinder (1). A beverage dispenser comprising a cylindrical body (4-1) that can be fitted into a chamber, and a seal ring (4-2) fitted onto the cylindrical body (4-1), wherein the main body member (3) is provided with a liquid discharge passage (3-1), the pressure holding assembly (5) is attached to the operating part (4) and / or the main body member (3), and the pressure holding assembly (5) opens the communication between the brewing chamber (2) and the liquid discharge passage (3-1) when the pressure in the brewing chamber (2) exceeds a set pressure, and closes the communication between the brewing chamber (2) and the liquid discharge passage (3-1) when the pressure falls below the set pressure.

2. The axis of the pressure-holding assembly (5) is parallel to the axis of the cylindrical body (4-1) of the operating part (4), and the pressure-holding assembly (5) comprises a coaxially arranged pressure-holding seat (5-1), a pressure-holding core (5-2), a spring (5-3), and a pressure-holding cover (5-4), the pressure-holding seat (5-1) is attached to the operating part (4) and is exposed at the lower end surface of the cylindrical body (4-1), the pressure-holding seat (5-1) is a cup-shaped body having a bottom with a first liquid discharge hole (5-1-1), the spring (5-3) and the pressure-holding core (5-2) are arranged in the cavity of the pressure-holding seat (5-1), and The beverage dispenser according to claim 1, characterized in that a pressure-holding cover (5-4) is screwed into the upper opening of the pressure-holding seat (5-1), the spring (5-3) is pushed down to press the pressure-holding core (5-2) downward, sealing the upper opening of the first liquid discharge hole (5-1-1), the set pressure is the pressing force applied to the pressure-holding core (5-2) by the spring (5-3), the pressure-holding cover (5-4) is provided with a second liquid discharge hole (5-4-1) that communicates with the lumen of the pressure-holding seat (5-1), and the second liquid discharge hole (5-4-1) connects the lumen of the pressure-holding seat (5-1) to the liquid discharge passage (3-1).

3. The beverage dispenser according to claim 2, characterized in that the surface of the pressure-holding core (5-2) that contacts the upper opening of the first liquid discharge hole (5-1-1) is a spherical arc surface, and a flow guide groove (5-2-1) for directing the beverage upward is formed in the peripheral portion of the pressure-holding core (5-2).

4. The beverage dispenser according to claim 2, characterized in that the operating part (4) is provided with a mounting hole, and the pressure-holding seat (5-1) is fitted tightly into the mounting hole.

5. The beverage dispenser according to claim 2, characterized in that the pressure-holding cover (5-4) is airtightly inserted into the main body member (3) of the piston, and the lumen of the pressure-holding seat (5-1) is connected to the liquid discharge passage (3-1).

6. The beverage dispenser according to claim 2, characterized in that a filter screen (6) covering the lower end surface of the operating part (4) is provided below the first liquid intake hole (5-1-1).

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