Structure of small high-pressure coffee machine

Abstract

A water tank is arranged on the upper portion in a cylindrical machine body, a step is arranged on an upper opening portion of the water tank and lapped on an upper opening portion of a positioning ring, an upper cover is screwed on the positioning ring in a threaded mode, a support is arranged in the machine body to fix a water pump, a battery and a circuit board, and the machine body is arranged on the periphery of a lower shell in a sleeved mode. The lower end face of the machine body abuts against an outer step of the lower shell, a switch button is arranged in the middle area of the machine body, a water outlet of the water pump is directly connected with a water receiving opening of the lower shell, a small water groove is formed in the inner bottom face of the water receiving opening and leads to the upper space of the water distribution partition net, and the lower shell is screwed with a coffee filtering device. The high-pressure espresso coffee maker can make high-pressure espresso coffee, and is small and portable in appearance, simple and reliable in structure and low in manufacturing cost.

Description

Technical Field

[0001] The invention relates to the field of coffee brewing appliances, and in particular to the structure of a small high-pressure coffee machine. Background Art

[0002] At present, small high-pressure coffee machines have their own characteristics and are flourishing, but they generally have defects such as poor coffee effect, insufficient pressure, high failure rate, water leakage, complex structure and high cost. Summary of the invention

[0003] The present invention aims to solve the technical defects existing in the prior art and proposes a small high-pressure coffee machine structure, which can produce high-pressure espresso coffee, has a small and portable appearance, a simple and reliable structure, a low manufacturing cost, and is easy to use.

[0004] The technical solution adopted by the present invention is: the present invention proposes a structure of a small high-pressure coffee machine, which is a water tank arranged at the upper inner part of a cylindrical body, the upper opening of the water tank has a step that rests on the upper opening of a positioning ring, the upper cover is screwed on the positioning ring, a bracket is arranged in the body to fix a water pump, a battery, and a circuit board, the body is sleeved on the outer periphery of a lower shell body, the lower end surface of the body is in contact with the outer step of the lower shell body, a switch button is arranged in the middle area of ​​the body, the water outlet of the water pump is directly connected to the water inlet of the lower shell body, the inner bottom surface of the water inlet is provided with a small water trough, the water trough leads to the upper space of the water dividing net, the lower shell body is screwed on the filter box body, the filter box body has a coffee filter powder bowl filled with coffee powder.

[0005] As an improvement of the above solution, the inner end surface of the upper cover has a sealing ring connected to the one-way valve, the edge of the sealing ring is pressed and sealed against the edge of the water tank, the one-way valve is in a duckbill shape facing inward, air can enter the water tank through the one-way valve, the water in the water tank will not flow out of the one-way valve, and the water tank will not leak no matter how it is shaken. The water is separated by the sealing ring and does not contact the upper cover, and the heat will not be quickly transferred to the upper cover, which can prevent the upper cover from being scalded and prevent the water temperature from dropping.

[0006] The bottom of the water tank is welded with screws, and nuts are screwed in to fix the bracket. The bracket has slots for fixing the water pump, battery, and circuit board respectively. The bracket has positioning grooves around it, which match the ribs on the inner wall of the fuselage to fix the position. The bracket has screw holes, which are connected to the lower shell by screws. The lower shell has grooves around it, which match and fix the ribs on the inner wall of the fuselage to prevent rotation.

[0007] The bracket is provided with reinforcing ribs, which support the back of the water pump to ensure that the water outlet of the water pump is firmly and reliably connected with the water inlet of the lower shell.

[0008] The button is made of soft rubber material and can be directly installed from the outside of the button hole of the body, so it is easy to assemble and has a simple structure.

[0009] The body is made of aluminum alloy material, which can strengthen the body structure and improve the product grade.

[0010] The inner end surface of the lower shell body is provided with a sealing groove, and the sealing groove is tightly matched and sealed with the water separation support pad, so that water will not contact the inner end surface of the lower shell body, thereby preventing heat from being transferred to the inside of the machine body, protecting the water pump, the battery and other components, and also preventing heat loss, increasing the temperature of the coffee, and playing a role of heat insulation.

[0011] The sealing notch has a chamfer, so that water can diffuse into the upper space of the water-dividing isolation net through the gap of the chamfer.

[0012] The surface of the water-dividing support pad has a plurality of convex points, which can support the space above the water-dividing partition net, prevent the upper space from being compressed and deformed, and ensure uniform and smooth water distribution.

[0013] The bottom step of the filter box body is covered with the dust cover, and the inner opening of the dust cover is provided with a flange which matches the groove at the root of the step at the lower end of the filter box body.

[0014] The implementation of the present invention has the following beneficial effects:

[0015] The invention can make high-quality espresso coffee, is compact and portable, has a simple and reliable structure and a low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the decomposition structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the assembly positions of some parts of the present invention. DETAILED DESCRIPTION

[0019] like Figure 1 , Figure 2 , Figure 3As shown, a structure of a small high-pressure coffee machine is provided, wherein a water tank (3) is arranged at the upper part of a cylindrical body (9), the upper opening of the water tank (3) has a step which rests on the upper opening of a positioning ring (7), the upper cover (1) is screwed onto the positioning ring (7), the body (9) has a bracket (12) which fixes a water pump (19), a battery (18), and a circuit board (13), the body (9) is sleeved on the outer periphery of a lower shell (22), and the lower end surface of the body (9) is in contact with the lower shell (22). The outer step is abutted, the switch button (11) is arranged in the middle area of ​​the machine body (9), the water outlet (100) of the water pump (19) is directly connected to the water inlet (105) of the lower shell (22), the inner bottom surface of the water inlet (105) is provided with a small water tank (103), the water tank (103) is connected to the upper space of the water separation net (27), the lower shell (22) is screwed with the filter box body (29), and the filter box body (29) has a filter powder bowl (28) inside, which contains coffee powder.

[0020] The inner end surface of the upper cover (1) is provided with a sealing ring (2) which is connected to a one-way valve (101) in an integral manner. The edge of the sealing ring (2) is pressed and sealed against the edge of the water tank (3). The one-way valve (101) is in a duckbill shape facing inward, and air can enter the water tank (3) through the one-way valve (101). The water in the water tank (3) will not flow out of the one-way valve (101). No matter how the water tank (3) is shaken, it will not leak. The hot water is separated by the sealing ring (2) and does not contact the upper cover (1). The heat will not be quickly transferred to the upper cover (1), which can prevent the upper cover (1) from being scalded and prevent the water temperature from dropping.

[0021] The edge of the positioning ring (7) has a step and rests on the upper end surface of the fuselage (9). The inner step of the positioning ring (7) has a rubber ring (8) which tightly matches and seals with the inner upper part of the fuselage (9).

[0022] Two screws (4) are welded to the bottom of the water tank (3), and nuts (15) are screwed in to fix the bracket (12). The bracket (12) has slots for fixing the water pump (19), the battery (18), and the circuit board (13), respectively. The bracket (12) has two positioning slots (111) around it, and the positioning slots (111) match the convex ribs (104) on the inner wall of the fuselage (9) to fix the position. The bracket (12) has three screw post holes, and is connected to the lower shell (22) through three screws. The lower shell (22) has two grooves (106) around it, and the grooves (106) match and fix the convex ribs (104) on the inner wall of the fuselage (9) to prevent rotation.

[0023] The bracket (12) is provided with a reinforcing rib (107), and the end surface of the reinforcing rib (107) bears against the back of the water pump (19), thereby ensuring that the water outlet (100) of the water pump (19) and the water inlet (105) of the lower shell (22) are firmly and reliably connected. The water outlet (100) is covered with a small rubber ring (20), which is tightly matched with the water inlet (105). The high-pressure joint is located at only one location, and the reliability of preventing water leakage is high.

[0024] The water tank (3) has a water nozzle (5) at the bottom thereof, which is connected to the inlet of the water pump (19) through a rubber hose (17).

[0025] The charging seat (16) covers the charging port (14) to shield the internal circuit board.

[0026] The present invention specifically uses a 6V, 10W high-pressure diaphragm water pump (19), the maximum blocking pressure can reach 20bar, and the normal working pressure is 12bar. The battery (18) uses two 18650 type batteries connected in series, with a voltage of 7.2V. The circuit board (13) automatically controls the coffee making process. It only takes two consecutive presses of the switch button (11) to start the machine, and a cup of coffee can be made in 50 seconds. If there is a blocking overpressure situation, the circuit board (13) can automatically detect that the overload current exceeds the standard and automatically shut down for protection. The circuit board (13) is also provided with a charging and protection circuit. The charging port (14) is a universal typ-c type interface with a charging voltage of 5V, which is consistent with an ordinary mobile phone charger and is convenient to use. After charging, the charging cover (10) is tightly closed, and the whole machine can be waterproof.

[0027] The switch button (11) is made of soft rubber material and can be directly installed from the outside of the button hole of the body (9), so it is easy to assemble and has a simple structure.

[0028] The body (9) is made of aluminum alloy material, which can strengthen the body structure and improve the product quality.

[0029] The inner end surface of the lower shell (22) is provided with a sealing groove (108), and the sealing groove (108) is tightly matched and sealed with the water separation support pad (25), so that water does not contact the inner end surface of the lower shell (22), thereby preventing heat from being transferred to the inside of the machine body (9), protecting the water pump (19), the battery (18) and other components, and also preventing heat from being lost, thereby increasing the temperature of the coffee, playing a role of heat insulation, and preventing water from flowing through the screw hole into the inside of the machine body. The screw hole is tightly plugged with a screw cover (24) made of silicone material to further enhance the sealing effect.

[0030] The mouth of the sealing groove (108) is provided with a chamfer (109), so that water can diffuse into the upper space of the water-dividing partition net (27) through the gap of the chamfer (109).

[0031] The surface of the water-dividing support pad (25) has a plurality of protrusions (110), which can support the space above the water-dividing partition net (27), prevent the space above from being compressed and deformed, and ensure uniform and smooth water diversion.

[0032] The lower shell (22) is threadedly screwed onto the filter box body (29), and a mesh rubber ring (26) is provided around the inner bottom surface of the lower shell (22) to tightly press and seal with the filter box body (29). The mesh rubber ring (26) has a slot in its inner ring, into which the water separation mesh (27) is built, and a plurality of small holes are evenly distributed on the surface of the water separation mesh (27), so that water can evenly flow to the surface of the coffee powder.

[0033] When making coffee, firstly, coffee powder is placed in the filter powder bowl (28), evenly distributed and pressed, and then the filter powder bowl (28) is placed in the filter box body (29) and screwed to the lower shell (22), and then hot water is added to the water tank (3), and the upper cover (1) is screwed, and the switch button (11) is pressed twice continuously and quickly, and the coffee machine starts to work, and the hot water enters the water pump (19) through the water nozzle (5) and the rubber hose (17) at the bottom of the water tank (3), and flows out of the water outlet (100) of the water pump (19) after being pressurized, directly enters the inner cavity of the lower shell (22), and then passes through the water separation net (27) to flow onto the coffee powder, penetrates the coffee powder, is extracted into concentrated coffee, and flows out through the filter powder bowl (28). The process of making coffee is simple and convenient.

[0034] The bottom step of the filter box body (29) is covered with a dust cover (30), and the inner opening of the dust cover (30) is provided with a flange (102) which matches the groove at the root of the lower step of the filter box body (29) to prevent it from falling off easily and facilitate storage and carrying.

[0035] Although the embodiments of the present invention are described in terms of practical solutions, they do not constitute limitations on the meaning of the present invention. For those skilled in the art, it is obvious to modify the implementation scheme according to this specification and combine it with other solutions without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A structure of a small high-pressure coffee machine, characterized in that: The invention comprises a water tank (3) arranged at the upper part of a cylindrical body (9), the upper part of the water tank (3) having a step placed on the upper part of a positioning ring (7), an upper cover (1) being screwed on the positioning ring (7), a bracket (12) being arranged in the body (9) for fixing a water pump (19), a battery (18) and a circuit board (13), the body (9) being sleeved on the outer periphery of a lower shell (22), the lower end surface of the body (9) being in contact with the outer step of the lower shell (22), a switch button (11) being arranged in the middle area of ​​the body (9), a water outlet (100) of the water pump (19) being directly connected to a water inlet (105) of the lower shell (22), a small water groove (103) being arranged on the inner bottom surface of the water inlet (105), the water groove (103) being connected to the upper space of a water separation net (27), and a filter box main body (29) being screwed on the lower shell (22).

2. The structure of a small high-pressure coffee machine according to claim 1, characterized in that: The inner end surface of the upper cover (1) is provided with a sealing ring (2) which is integrally connected with a one-way valve (101), and the edge of the sealing ring (2) is pressed and sealed against the edge of the water tank (3).

3. The structure of a small high-pressure coffee machine according to claim 1, characterized in that: The inner wall of the body (9) has a convex rib (104) that matches the positioning groove (111) around the bracket (12) and the groove (106) around the lower shell (22).

4. The structure of a small high-pressure coffee machine according to claim 1, characterized in that: The inner end surface of the lower shell (22) is provided with a sealing groove (108) which is tightly matched with the water separation support pad (25), and the mouth of the sealing groove (108) is chamfered (109).

5. The structure of a small high-pressure coffee machine according to claim 1, characterized in that: The surface of the water-dividing support pad (25) has a plurality of protrusions (110).

6. The structure of a small high-pressure coffee machine according to claim 1, characterized in that: The bottom step of the filter box body (29) is covered with a dust cover (30), and the inner opening of the dust cover (30) has a flange (102) that matches the groove at the root of the lower step of the filter box body (29).

7. The structure of a small high-pressure coffee machine according to claim 1, characterized in that: The fuselage (9) is made of aluminum alloy material.

8. The structure of a small high-pressure coffee machine according to claim 1, characterized in that: The button (11) is made of soft rubber material.

9. The structure of a small high-pressure coffee machine according to claim 1, characterized in that: The bracket (12) has a reinforcing rib (107), the end surface of which bears against the back of the water pump (19).

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