Structure of small high-pressure coffee machine

Abstract

The utility model discloses a structure of a small-sized high-pressure coffee machine, which is characterized in that a water tank is arranged at the upper part in a cylindrical machine body, the upper opening part of the water tank is provided with a step which is lapped on the upper opening part of a positioning ring, an upper cover is screwed on the positioning ring through threads, a bracket is arranged in the machine body to fix a water pump, a battery and a circuit board, and the machine body is sleeved on the periphery of a lower shell. 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 Italian espresso coffee maker can make high-pressure Italian espresso coffee and is small and portable in appearance, simple and reliable in structure and low in manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of coffee brewing equipment, and more particularly to the structure of a small high-pressure coffee machine. Background Technology

[0002] Currently, small high-pressure coffee machines have various features and are flourishing, but they generally suffer from defects such as poor coffee quality, insufficient pressure, high failure rate, water leakage, complex structure, and high cost. Summary of the Invention

[0003] This invention aims to address the technical deficiencies in the existing technology by proposing a structure for a small high-pressure coffee machine that can produce high-pressure espresso. It is compact and portable, with a simple and reliable structure, low manufacturing cost, and easy to use.

[0004] The technical solution adopted by this utility model is as follows: This utility model proposes a structure for a small high-pressure coffee machine. A water tank is installed in the upper 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 onto the positioning ring. A bracket inside the body secures the water pump, battery, and circuit board. The body is fitted around the lower housing, and the lower end face of the body abuts against the outer step of the lower housing. The switch button is located in the middle area of ​​the body. The water pump outlet is directly connected to the water inlet of the lower housing. The bottom surface of the water inlet has a small water trough that leads to the upper space of the water distribution mesh. The lower housing is screwed onto the filter cartridge body, which contains a coffee filter bowl filled with coffee powder.

[0005] As an improvement to the above solution, the inner end face of the top cover has a sealing ring integrated with a one-way valve. The edge of the sealing ring is pressed tightly against the edge of the water tank for a seal. The one-way valve is duckbill-shaped and faces inward, allowing air to enter the water tank through the one-way valve while preventing water from flowing out of the one-way valve. No matter how much the tank is shaken, it will not leak. The water is separated by the sealing ring and does not contact the top cover, preventing heat from being quickly transferred to the top cover. This prevents the top cover from becoming too hot to touch and also prevents the water temperature from dropping.

[0006] Screws are welded to the bottom of the water tank, and nuts are tightened to secure the bracket. The bracket has slots for securing the water pump, battery, and circuit board. Positioning grooves around the bracket mate with the ribs on the inner wall of the casing to fix their positions. The bracket has screw holes for connecting to the lower housing via screws. The lower housing has grooves around its periphery that mate with the ribs on the inner wall of the casing to prevent rotation.

[0007] The bracket has reinforcing ribs that press against the back of the water pump, ensuring that the water pump outlet and the water inlet of the lower housing are firmly and reliably connected.

[0008] The button is made of soft rubber material and can be directly inserted from the button hole on the body, making assembly convenient and the structure simple.

[0009] The body is made of aluminum alloy, which strengthens the structure and enhances the product's quality.

[0010] The inner end face of the lower housing has a sealing groove, which is tightly fitted and sealed with the water distribution support pad. Water will not come into contact with the inner end face of the lower housing, which can prevent heat from being transferred to the inside of the machine body, protect the water pump, the battery and other components, and also prevent heat loss, increase the coffee temperature, and play a role in heat insulation.

[0011] The sealing groove has a chamfer, which allows water to diffuse through the gaps in the chamfer into the upper space of the water-dividing mesh.

[0012] The surface of the water distribution support pad has multiple protrusions, which can support the space above the water distribution mesh, prevent the upper space from being deformed by pressure, and ensure uniform and smooth water distribution.

[0013] The bottom step of the filter box body is fitted with the dust cover, and the inner opening of the dust cover has a flange that matches the groove at the root of the lower step of the filter box body.

[0014] The following are the beneficial effects of implementing this utility model:

[0015] It can make high-quality espresso, is compact and portable, has a simple and reliable structure, and has low manufacturing costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0017] Figure 2 This is an exploded structural diagram of the present invention.

[0018] Figure 3 This is a schematic diagram showing the assembly positions of some parts of this utility model. Detailed Implementation

[0019] like Figure 1 , Figure 2 , Figure 3As shown, a small high-pressure coffee machine is characterized by the following features: a water tank (3) is installed in the upper part of a cylindrical body (9), the upper opening of the water tank (3) has a step that rests on the upper opening of a positioning ring (7), and the upper cover (1) is screwed onto the positioning ring (7). Inside the body (9), a bracket (12) is provided to fix a water pump (19), a battery (18), and a circuit board (13). The body (9) is fitted around the lower housing (22), and the lower end face of the body (9) is flush with the lower housing (22). 22) The outer step abuts, the switch button (11) is located in the middle area of ​​the body (9), the outlet (100) of the water pump (19) is directly connected to the water inlet (105) of the lower housing (22), the bottom surface of the water inlet (105) has a small water tank (103), the water tank (103) is connected to the upper space of the water divider (27), the lower housing (22) is screwed into the filter box body (29), the filter box body (29) has a filter powder bowl (28) inside, which contains coffee powder.

[0020] The inner end face of the top cover (1) has a sealing ring (2) integrated with the one-way valve (101). The edge of the sealing ring (2) is pressed tightly against the edge of the water tank (3) for sealing. The one-way valve (101) is duckbill shaped and faces inward, allowing air to enter the water tank (3) through the one-way valve (101). The water in the water tank (3) will not flow out from the one-way valve (101), and the water tank (3) will not leak no matter how it is shaken. The hot water is separated by the sealing ring (2) and does not come into contact with the top cover (1), so the heat will not be quickly transferred to the top cover (1), which can prevent the top cover (1) from getting too hot to the touch and also prevent the water temperature from dropping.

[0021] The positioning ring (7) has a step on its edge, which rests on the upper surface of the body (9). The positioning ring (7) has a rubber ring (8) at the step inside, which fits tightly and seals against the upper part of the body (9).

[0022] Two screws (4) are welded to the bottom of the water tank (3), and nuts (15) are used to fix the bracket (12). The bracket (12) has slots for fixing the water pump (19), the battery (18), and the circuit board (13). The bracket (12) has two positioning slots (111) around its perimeter. The positioning slots (111) match the ribs (104) on the inner wall of the body (9) to fix their positions. The bracket (12) has three screw holes, which are connected to the lower housing (22) by three screws. The lower housing (22) has two grooves (106) around its perimeter. The grooves (106) match the ribs (104) on the inner wall of the body (9) to fix them and prevent rotation.

[0023] The bracket (12) has reinforcing ribs (107), the end face of which abuts against the back of the water pump (19), ensuring that the outlet (100) of the water pump (19) and the inlet (105) of the lower housing (22) are firmly and reliably connected. The outlet (100) is fitted with a small rubber ring (20), which fits tightly with the inlet (105). This is the only high-pressure connection point, ensuring high reliability in preventing water leakage.

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

[0025] The charging base (16) covers the charging port (14) and blocks the internal circuit board.

[0026] This utility model specifically uses a 6V, 10W high-pressure diaphragm water pump (19), with a maximum blockage pressure of 20 bar and a normal operating pressure of 12 bar. The battery (18) uses two 18650 batteries connected in series, with a voltage of 7.2V. The circuit board (13) automatically controls the coffee-making program. Simply press the switch button (11) twice to start the machine. It takes 50 seconds to make a cup of coffee. If there is a blockage or overpressure, the circuit board (13) can automatically detect the overload current and automatically shut down for protection. The circuit board (13) is also equipped with charging and protection circuits. The charging port (14) is a universal Type-C interface with a charging voltage of 5V, which is the same as that of a regular mobile phone charger, making it convenient to use. After charging, close the charging cover (10) tightly, and the whole machine is waterproof.

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

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

[0029] The inner end face of the lower housing (22) has a sealing groove (108), which is tightly fitted and sealed with the water distribution support pad (25). Water will not come into contact with the inner end face of the lower housing (22), which can prevent heat from being transferred to the inside of the machine body (9) and protect the water pump (19), the battery (18) and other components. It also prevents heat loss, increases the coffee temperature, and plays a role in heat insulation. It can also prevent water from flowing through the screw hole and entering the machine body. The screw hole is filled with a screw cap (24) made of silicone material to further enhance the sealing effect.

[0030] The opening of the sealing groove (108) has a chamfer (109), which allows water to diffuse through the gap of the chamfer (109) into the upper space of the water-dividing mesh (27).

[0031] The surface of the water-dividing support pad (25) has multiple protrusions (110) that can support the space above the water-dividing mesh (27), prevent the upper space from being deformed by pressure, and ensure that the water is divided evenly and smoothly.

[0032] The lower housing (22) is screwed onto the filter box body (29). The lower housing (22) has a mesh rubber ring (26) around its inner bottom surface, which is tightly pressed and sealed with the filter box body (29). The inner ring of the mesh rubber ring (26) has a groove, in which the water-distributing mesh (27) is built. The surface of the water-distributing mesh (27) has multiple small holes evenly distributed, which can make water flow evenly to the surface of the coffee powder.

[0033] When making coffee, first place the coffee powder into the filter bowl (28), distribute it evenly, and press it down. Then place the filter bowl (28) into the filter cartridge body (29) and screw it onto the lower housing (22). Next, fill the water tank (3) with hot water, tighten the top cover (1), and press the switch button (11) twice in quick succession. The coffee machine will start working. The hot water will enter the water pump (19) through the water nozzle (5) and the hose (17) at the bottom of the water tank (3). After being pressurized, the hot water will flow out of the outlet (100) of the water pump (19) and directly into the inner cavity of the lower housing (22). It will then pass through the water separator (27) onto the coffee powder, be extracted into espresso, and flow out through the filter bowl (28). The process of making coffee is simple and convenient.

[0034] The bottom step of the filter box body (29) is fitted with a dust cover (30). 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) to prevent it from falling off easily and to facilitate storage and carrying.

[0035] Although the embodiments of this utility model are described with reference to actual solutions, they do not constitute a limitation on the meaning of this utility model. For those skilled in the art, modifications to the implementation schemes and combinations with other schemes based on this specification are obvious without departing from the principle of this utility model, and these improvements and refinements are also considered to be within the protection scope of this utility model.

Claims

1. A structure of a small high-pressure coffee machine, characterized by, It is in the cylindrical body (9) in the upper part of the water tank (3), the water tank (3) upper step on the upper part of the positioning ring (7), the upper cover (1) is screwed on the positioning ring (7), the body (9) has a support (12) fixed water pump (19), battery (18), circuit board (13), the body (9) is sleeved on the outer periphery of the lower shell (22), the lower end surface of the body (9) and the outer step of the lower shell (22) abuts, the switch button (11) is arranged in the middle region of the body (9), the water outlet (100) of the water pump (19) is directly connected with the water inlet (105) of the lower shell (22), the inner bottom surface of the water inlet (105) has a small water tank (103), the water tank (103) is connected to the upper space of the water distribution screen (27), the lower shell (22) is screwed with the filter box body (29).

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) has a sealing ring (2) and a one-way valve (101) connected integrally, the edge of the sealing ring (2) is pressed tightly with 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) matched with the positioning groove (111) around the support (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) has a sealing groove (108) matched with the water distribution support pad (25), and the mouth of the sealing groove (108) has a chamfer (109).

5. The structure of a small high-pressure coffee machine according to claim 4, characterized in that, The surface of the water distribution support pad (25) has a plurality of convex points (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 sleeved with a dust cover (30), the inner mouth of the dust cover (30) has a flange (102) matched with the groove at the root of the lower end 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 body (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 support (12) has a reinforcing rib (107) on the upper surface, which abuts against the back surface of the water pump (19).

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