Coffee machine powder and water integrated device and automatic pressure coffee machine

Abstract

The utility model discloses a coffee machine powder feeding and water feeding integrated device and automatic pressure coffee machine. Powder feeding and water feeding integrated device includes the gland body of fixed connection with coffee machine body component, the powder sleeve of being sealed and can axial movement of being covered in the gland body, the hot water inlet, the cold water inlet and the discharge port are connected on the gland body, the hot water flow channel, the cold water flow channel of being axially through are established to the gland body, the hot water passage is established in the powder sleeve, and the water distribution plate is established in the bottom of powder sleeve, when working, the high pressure cold water enters the cold water flow channel and the powder sleeve inner chamber from the cold water inlet, and the powder sleeve moves down, and the bottom is pressed against the coffee powder compaction in the extraction handle component of coffee machine, then the hot water enters the hot water flow channel from the hot water inlet, and is delivered to the extraction handle component from the water distribution plate through the hot water passage, after the water supply is completed, the high pressure cold water in the powder sleeve inner chamber is discharged through the cold water flow channel and the discharge port reversely, and the powder sleeve is pressed reset by the reset spring of outer sleeve.

Description

Technical Field

[0001] This utility model relates to coffee brewing accessories, specifically to an integrated coffee machine tamping and water supply device. Additionally, this utility model also relates to coffee brewing electrical appliances, specifically to an automatic pressure coffee machine. Background Technology

[0002] Coffee is one of the world's three major beverages. In current technology, coffee brewing appliances are mainly used on desktops in homes or offices. They are connected to mains electricity via a power cord and use water and coffee powder, coffee packets, coffee capsules, etc. to brew coffee.

[0003] Traditional pressure coffee machines use a pump to pump cold water into a boiler and heat it to the desired coffee-making temperature for extraction. These machines require a separate coffee grinder to prepare the coffee grounds, resulting in numerous components, a large footprint, and inconvenience. Furthermore, the separate grinder requires manual tamping of the grounds into the portafilter assembly, followed by manually moving the portafilter under the water outlet for extraction – all cumbersome. Currently, there is no fully automated integrated system that combines tamping and hot water supply into a single unit, preventing existing pressure coffee machines from achieving full automation. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an integrated coffee machine tamping and water supply device. This integrated coffee machine tamping and water supply device can integrate the automatic tamping and water supply process after coffee powder is ground into one, without the need for manual operation. It is easy to use and facilitates the linkage between the tamping and extraction processes after coffee grinding to achieve automatic coffee production. It also has a high degree of integration, saves space, reduces parts, and saves costs.

[0005] This utility model also provides an automatic pressure coffee machine that integrates coffee powder tamping and pressure extraction into one unit, with the two working together to achieve automatic coffee production, making it convenient to use and operate.

[0006] The technical solution adopted by the integrated coffee maker tamping and water supply device of this utility model is as follows: The coffee machine includes a body assembly and an extraction handle assembly. The integrated tamping and water supply device is located above the extraction handle assembly and includes a pressure cap body fixedly connected to the body assembly and a tamping sleeve sleeved on the outside of the pressure cap body. The tamping sleeve can move axially and always maintains a sealed fit with the pressure cap body. A return spring is sleeved on the outer periphery of the tamping sleeve. The pressure cap body is connected to a hot water inlet for coffee extraction, a high-pressure cold water inlet, and a high-pressure cold water outlet. The pressure cap body has an axially penetrating hot water channel at its center and an eccentrically axially penetrating high-pressure cold water channel. The tamping sleeve has an axially penetrating hot water channel isolated from the inner cavity at its center. The bottom of the tamping sleeve has a distribution channel for the extracted coffee. A water distribution plate with several nozzles is used to dispense hot water. During operation, the solenoid valve on the high-pressure cold water drain side is closed, and high-pressure cold water enters the high-pressure cold water channel from the high-pressure cold water inlet and flows into the inner cavity of the tamping sleeve. Under water pressure, the tamping sleeve moves downward until its bottom presses against and compacts the coffee powder in the extraction handle assembly. Then, a measured amount of hot water enters the hot water channel from the hot water inlet and is delivered from the water distribution plate through the hot water channel to the coffee powder in the extraction handle assembly for extraction. After the hot water supply is completed, the solenoid valve on the high-pressure cold water drain side is opened, and the high-pressure cold water in the inner cavity of the tamping sleeve is discharged in reverse through the high-pressure cold water channel and the high-pressure cold water drain. Under the action of the return spring, the tamping sleeve is pushed upward and reset.

[0007] The body assembly includes a base plate, and a first side plate, a second side plate, an outer end plate, an inner end plate, and a middle end plate that are connected to each other to form a frame structure and are integrally connected to the base plate. The cover body is provided with two opposing outward support arms, and the two support arms are respectively fixedly connected to the first side plate and the second side plate.

[0008] The upper part of the powder pressing sleeve is provided with two opposing outwardly protruding limiting arms. The outer end plate and the middle end plate are respectively provided with a first guide groove and a second guide groove. The two limiting arms are respectively located in the first guide groove and the second guide groove and can move up and down. When the limiting arms are located at the top and bottom of the first guide groove and the second guide groove, they respectively limit the highest point of the powder pressing sleeve to reset upward and the lowest point of the powder pressing downward.

[0009] The upper and lower ends of the reset spring press against the two limiting arms and the base plate respectively to be limited.

[0010] A position sensor is provided on the limiting arm located in the second guide groove, and a position switch is provided on the outer side of the middle end plate at the lowest point of the second guide groove. When the tamping sleeve moves down to the bottom to compact the coffee powder, the position sensor causes the position switch to close, and the high-pressure cold water stops entering the high-pressure cold water channel from the high-pressure cold water inlet and maintains pressure.

[0011] The position switch is a push-button micro switch, and the position sensor is a pressure block; or, the position switch is a reed switch, and the position sensor is a magnetic block; or, the position switch is a photoelectric switch, and the position sensor is a light-shielding / reflective element.

[0012] After the powder pressing sleeve is connected to the pressure cap body, the outer wall of the hot water channel extends into the hot water flow channel. The hot water flow channel has an embedding groove in the middle, and an embedded ring is embedded in the embedding groove. The embedded ring has a first sealing ring, so that when the powder pressing sleeve moves axially relative to the pressure cap body, the outer wall of the hot water channel remains sealed with the first sealing ring, thereby isolating the hot water flow channel and the inner cavity of the powder pressing sleeve.

[0013] The top of the pressure cap is connected to an inlet / outlet connector. The hot water inlet, the high-pressure cold water inlet, and the high-pressure cold water drain are all located on the upper part of the inlet / outlet connector. The lower part of the inlet / outlet connector leads out a hot water conduit communicating with the hot water inlet and a cold water conduit communicating with the high-pressure cold water inlet and the high-pressure cold water drain. The connection between the hot water conduit, the cold water conduit and the pressure cap is sealed by a second sealing ring and a third sealing ring, respectively.

[0014] A valve core is provided at the top of the hot water channel. The valve core is located inside the hot water flow channel. The valve core includes a circular plate in the middle, an upper shaft and a lower shaft located on the upper and lower parts of the circular plate, respectively, and a conical sealing part located between the circular plate and the lower shaft. The outer edge of the circular plate has a water passage groove. The outer diameter of the circular plate is adapted to the inner diameter of the hot water flow channel so that the valve core can slide up and down along the hot water flow channel. The lower shaft is inserted into the hot water channel. A first conical spring is also provided inside the hot water flow channel. The bottom of the first conical spring is sleeved on the upper shaft. The top of the spring is positioned inside the hot water conduit. In the reset state of the powder pressing sleeve, the first conical spring presses the valve core downwards, causing the conical sealing part to match the inner chamfer at the top of the hot water channel for sealing, thus preventing hot water from entering the hot water channel. When the powder pressing sleeve moves downwards to the bottom and is in the hot water supply state, the first conical spring no longer presses the valve core, and hot water enters the hot water flow channel below the circular plate through the water passage, causing the valve core to float up and no longer seal the top of the hot water channel, allowing hot water to flow into the hot water channel.

[0015] The bottom of the capping body is provided with an annular groove for fitting a piston ring, so that when the powder pressing sleeve moves axially relative to the capping body, the bottom of the capping body is kept sealed to the side wall of the inner cavity of the powder pressing sleeve by the piston ring.

[0016] The lower part of the hot water channel has an enlarged lower cavity with internal threads. The top of the lower cavity has a constriction. A water outlet is connected to the lower cavity through external threads. The top of the water outlet has a water outlet cavity. The water outlet cavity has a central column and a water outlet hole at the bottom. The water outlet cavity also has a second conical spring. The root of the second conical spring is sleeved on the central column. The top of the second conical spring is connected to a plug cap. When hot water is not supplied, the second conical spring pushes the plug cap upward to close the constriction, preventing the hot water remaining in the hot water channel from flowing out. When hot water is supplied, the water pressure pushes the plug cap downward, and the hot water in the hot water channel flows from the constriction through the water outlet cavity and then flows out from the water distribution plate through the water outlet hole.

[0017] The bottom of the central column is provided with a blind hole that communicates with the outside, which is used to connect and fix the water distribution plate to the blind hole by self-tapping screws.

[0018] The lower part of the tamping sleeve is provided with an annular groove for fitting a sealing ring, so that the tamping sleeve moves downward until the bottom is compacted to tamp the coffee powder and deliver hot water to the coffee powder in the extraction port assembly. The lower part of the sleeve is kept sealed to the powder compartment of the extraction port assembly by the sealing ring.

[0019] The technical solution adopted by this utility model of an automatic pressure coffee machine is as follows: The automatic pressure coffee machine of this utility model includes a body assembly, a water tank, a bean hopper for holding coffee beans, a control panel, an extraction handle assembly, a boiler assembly for electrically heating hot water, a pumping and piping valve assembly for pumping hot water to brew coffee and pumping cold water to provide high-pressure water for tamping coffee powder, a grinding device for grinding coffee beans into coffee powder, and an integrated tamping and water supply device. The integrated tamping and water supply device is located above the extraction handle assembly and includes a pressure cap body fixedly connected to the body assembly, and a tamping sleeve sleeved around the outside of the pressure cap body. The tamping sleeve is axially movable and always maintains a sealed fit with the pressure cap body. A return spring is fitted around the outer periphery of the tamping sleeve. The pressure cap body is connected to a hot water inlet for coffee extraction, a high-pressure cold water inlet, and a high-pressure cold water outlet. The pressure cap body has an axially penetrating hot water channel at its center and an eccentrically positioned axially penetrating... The high-pressure cold water channel includes a hot water channel that runs axially through the center of the inner cavity of the tamping sleeve and is isolated from the inner cavity. The bottom of the tamping sleeve has a water distribution plate with several nozzles for distributing the extraction hot water. During operation, the solenoid valve on the high-pressure cold water drain side is closed, and high-pressure cold water enters the high-pressure cold water channel from the high-pressure cold water inlet and flows into the inner cavity of the tamping sleeve. Under water pressure, the tamping sleeve moves downwards until its bottom presses against and compacts the coffee grounds in the extraction handle assembly. Then, a measured amount of hot water enters the hot water channel from the hot water inlet and is delivered through the hot water channel to the coffee grounds in the extraction handle assembly via the water distribution plate for extraction. After the hot water supply is complete, the solenoid valve on the high-pressure cold water drain side opens, releasing the high-pressure cold water in the inner cavity of the tamping sleeve in the reverse direction through the high-pressure cold water channel and the high-pressure cold water drain. Under the action of the return spring, the tamping sleeve is pushed upwards and reset.

[0020] The body assembly includes a base plate, and a first side plate, a second side plate, an outer end plate, an inner end plate, and a middle end plate that are connected to each other to form a frame structure and are integrally connected to the base plate. The cover body is provided with two opposing outward support arms, and the two support arms are respectively fixedly connected to the first side plate and the second side plate.

[0021] The upper part of the powder pressing sleeve is provided with two opposing outwardly protruding limiting arms. The outer end plate and the middle end plate are respectively provided with a first guide groove and a second guide groove. The two limiting arms are respectively located in the first guide groove and the second guide groove and can move up and down. When the limiting arms are located at the top and bottom of the first guide groove and the second guide groove, they respectively limit the highest point of the powder pressing sleeve to reset upward and the lowest point of the powder pressing downward.

[0022] The upper and lower ends of the reset spring press against the two limiting arms and the base plate respectively to be limited.

[0023] A position sensor is provided on the limiting arm located in the second guide groove, and a position switch is provided on the outer side of the middle end plate at the lowest point of the second guide groove. When the tamping sleeve moves down to the bottom to compact the coffee powder, the position sensor causes the position switch to close, and the high-pressure cold water stops entering the high-pressure cold water channel from the high-pressure cold water inlet and maintains pressure.

[0024] The position switch is a push-button micro switch, and the position sensor is a pressure block; or, the position switch is a reed switch, and the position sensor is a magnetic block; or, the position switch is a photoelectric switch, and the position sensor is a light-shielding / reflective element.

[0025] After the powder pressing sleeve is connected to the pressure cap body, the outer wall of the hot water channel extends into the hot water flow channel. The hot water flow channel has an embedding groove in the middle, and an embedded ring is embedded in the embedding groove. The embedded ring has a first sealing ring, so that when the powder pressing sleeve moves axially relative to the pressure cap body, the outer wall of the hot water channel remains sealed with the first sealing ring, thereby isolating the hot water flow channel and the inner cavity of the powder pressing sleeve.

[0026] The top of the pressure cap is connected to an inlet / outlet connector. The hot water inlet, the high-pressure cold water inlet, and the high-pressure cold water drain are all located on the upper part of the inlet / outlet connector. The lower part of the inlet / outlet connector leads out a hot water conduit communicating with the hot water inlet and a cold water conduit communicating with the high-pressure cold water inlet and the high-pressure cold water drain. The connection between the hot water conduit, the cold water conduit and the pressure cap is sealed by a second sealing ring and a third sealing ring, respectively.

[0027] A valve core is provided at the top of the hot water channel. The valve core is located inside the hot water flow channel. The valve core includes a circular plate in the middle, an upper shaft and a lower shaft located on the upper and lower parts of the circular plate, respectively, and a conical sealing part located between the circular plate and the lower shaft. The outer edge of the circular plate has a water passage groove. The outer diameter of the circular plate is adapted to the inner diameter of the hot water flow channel so that the valve core can slide up and down along the hot water flow channel. The lower shaft is inserted into the hot water channel. A first conical spring is also provided inside the hot water flow channel. The bottom of the first conical spring is sleeved on the upper shaft. The top of the spring is positioned inside the hot water conduit. In the reset state of the powder pressing sleeve, the first conical spring presses the valve core downwards, causing the conical sealing part to match the inner chamfer at the top of the hot water channel for sealing, thus preventing hot water from entering the hot water channel. When the powder pressing sleeve moves downwards to the bottom and is in the hot water supply state, the first conical spring no longer presses the valve core, and hot water enters the hot water flow channel below the circular plate through the water passage, causing the valve core to float up and no longer seal the top of the hot water channel, allowing hot water to flow into the hot water channel.

[0028] The bottom of the capping body is provided with an annular groove for fitting a piston ring, so that when the powder pressing sleeve moves axially relative to the capping body, the bottom of the capping body is kept sealed to the side wall of the inner cavity of the powder pressing sleeve by the piston ring.

[0029] The lower part of the hot water channel has an enlarged lower cavity with internal threads. The top of the lower cavity has a constriction. A water outlet is connected to the lower cavity through external threads. The top of the water outlet has a water outlet cavity. The water outlet cavity has a central column and a water outlet hole at the bottom. The water outlet cavity also has a second conical spring. The root of the second conical spring is sleeved on the central column. The top of the second conical spring is connected to a plug cap. When hot water is not supplied, the second conical spring pushes the plug cap upward to close the constriction, preventing the hot water remaining in the hot water channel from flowing out. When hot water is supplied, the water pressure pushes the plug cap downward, and the hot water in the hot water channel flows from the constriction through the water outlet cavity and then flows out from the water distribution plate through the water outlet hole.

[0030] The bottom of the central column is provided with a blind hole that communicates with the outside, which is used to connect and fix the water distribution plate to the blind hole by self-tapping screws.

[0031] The lower part of the tamping sleeve is provided with an annular groove for fitting a sealing ring, so that the tamping sleeve moves downward until the bottom is compacted to tamp the coffee powder and deliver hot water to the coffee powder in the extraction port assembly. The lower part of the sleeve is kept sealed to the powder compartment of the extraction port assembly by the sealing ring.

[0032] The beneficial effects of this utility model are as follows: The integrated coffee maker and water supply device of this utility model is located above the extraction handle assembly, including a pressure cap body fixedly connected to the main body assembly, and a coffee maker sleeve fitted around the outside of the pressure cap body. The coffee maker sleeve can move axially and always maintains a sealed fit with the pressure cap body. A return spring is fitted around the outer periphery of the coffee maker sleeve. The pressure cap body is connected to a hot water inlet for coffee extraction, a high-pressure cold water inlet, and a high-pressure cold water outlet. The pressure cap body has an axially penetrating hot water channel at its center and an eccentrically axially penetrating high-pressure cold water channel. The inner... The cavity has a centrally located, axially connected hot water channel isolated from the inner cavity. The bottom of the tamping sleeve has a water distribution plate with several nozzles for distributing the extraction hot water. During operation, the solenoid valve on the high-pressure cold water drain side is closed, and high-pressure cold water enters the high-pressure cold water channel from the high-pressure cold water inlet and flows into the inner cavity of the tamping sleeve. Under water pressure, the tamping sleeve moves downwards until its bottom presses against and compacts the coffee grounds inside the extraction handle assembly. Then, a measured amount of hot water enters the hot water channel from the hot water inlet and is delivered to the extraction handle via the water distribution plate through the hot water channel. The coffee powder is extracted within the tamping assembly. After hot water is supplied, the solenoid valve on the high-pressure cold water drain side opens, allowing the high-pressure cold water in the inner cavity of the tamping sleeve to flow backward through the high-pressure cold water channel and the high-pressure cold water drain. Under the action of the return spring, the tamping sleeve is pushed upward and reset. This utility model's integrated tamping and water supply device for coffee machines overcomes the defects and shortcomings of the prior art. Through the ingenious design of the cap body and the tamping sleeve, hot and cold water are separated. Utilizing the water tank and pumping device of existing pressure coffee machines, high-pressure cold water is used as the power source for tamping the coffee powder. After the coffee powder is ground, the tamping and extraction / water supply processes are integrated into one unit. After automatic tamping, the coffee powder is automatically brewed and extracted, making the coffee grinding, tamping, and extraction processes work together to achieve automatic coffee production without any manual operation, making it convenient to use. Therefore, this integrated tamping and water supply device for coffee machines can integrate the automatic tamping and water supply processes after coffee grinding into one unit, eliminating the need for manual operation, making it convenient to use, facilitating the linkage between the tamping and extraction processes after coffee grinding to achieve automatic coffee production, and has a high degree of integration, saving space, reducing parts, and saving costs.

[0033] The automatic pressure coffee machine of this invention includes a body assembly, a water tank, a bean hopper for holding coffee beans, a control panel, an extraction handle assembly, a boiler assembly for electrically heating hot water, a pumping and piping valve assembly for pumping hot water to brew coffee and pumping cold water to provide high-pressure water for tamping coffee beans, a grinding device for grinding coffee beans into coffee powder, and an integrated tamping and water supply device. The integrated tamping and water supply device is located above the extraction handle assembly and includes a pressure cap fixedly connected to the body assembly and a tamping sleeve fitted around the pressure cap. The tamping sleeve is axially movable and always maintains a sealed fit with the pressure cap. A return spring is fitted around the outer circumference of the sleeve. The cap body is connected to a hot water inlet for coffee extraction, a high-pressure cold water inlet, and a high-pressure cold water outlet. The cap body has an axially continuous hot water channel at its center and an eccentrically located axially continuous high-pressure cold water channel. The inner cavity of the tamping sleeve has an axially continuous hot water channel isolated from the inner cavity. The bottom of the tamping sleeve has a water distribution plate with several nozzles for distributing the extraction hot water. During operation, the solenoid valve on the high-pressure cold water outlet side is closed, and high-pressure cold water enters from the high-pressure cold water inlet into the high-pressure cold water channel and then flows into the inner cavity of the tamping sleeve. Under water pressure, the tamping sleeve... The machine moves downwards until the bottom presses against and compacts the coffee grounds inside the extraction handle assembly. Then, a measured amount of hot water enters the hot water channel from the hot water inlet and is delivered through the hot water channel from the water distribution plate to the coffee grounds inside the extraction handle assembly for extraction. After the hot water supply is complete, the solenoid valve on the high-pressure cold water drain side opens, releasing the high-pressure cold water in the inner cavity of the tamping sleeve through the high-pressure cold water channel and the high-pressure cold water drain. Under the action of the return spring, the tamping sleeve is pushed upwards to return to its original position. This automatic pressure coffee machine overcomes the defects and shortcomings of the prior art and overcomes the biases of the prior art in this field, allowing the bean hopper to... The coffee grinder, tamping unit, extraction portafilter assembly, boiler assembly, pumping assembly, and extraction hot water supply assembly are not only integrated into one unit, but also achieve interconnection between the coffee powder grinding, tamping, and pressure extraction processes to automatically make coffee. It is easy to use and operate. When making coffee, simply put the coffee beans into the bean hopper and connect the extraction portafilter assembly, and the entire coffee making process can be completed automatically on one appliance. There is no need to transfer equipment, reducing waiting time for manual intervention. It is easy to use and operate, and at the same time, it has a high degree of integration and occupies little space, improving the neatness and uniformity of the coffee machine's use and storage. It is a multi-functional, integrated, fully automatic pressure coffee machine that is convenient to store and use. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the automatic pressure coffee machine according to an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the overall internal structure of the automatic pressure coffee machine according to an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the overall structure of the coffee machine tamping and water supply integrated device in the tamping sleeve reset state according to an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the overall structure of the coffee machine tamping and water supply device in the tamping sleeve reset state from another perspective according to an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the overall structure of the coffee machine tamping and water supply integrated device according to an embodiment of the present invention when the tamping sleeve is in the bottom position;

[0039] Figure 6 This is a schematic diagram of the overall structure of the coffee machine tamping and water supply device according to another perspective when the tamping sleeve is in the bottom position, according to another embodiment of the present utility model.

[0040] Figure 7 This is a schematic diagram of the independent structure of the main components of the coffee machine tamping and water supply integrated device in the reset state according to an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the independent structure of the main components of the coffee machine tamping and water supply integrated device in an embodiment of the present invention when the tamping sleeve is in the bottom position.

[0042] Figure 9 This is an exploded structural diagram of the main components of the integrated coffee machine tamping and water supply device according to an embodiment of the present invention;

[0043] Figure 10 This is a cross-sectional view of the main components of the coffee machine tamping and water supply integrated device in the reset state according to an embodiment of the present invention.

[0044] Figure 11 This is a cross-sectional view of the main components of the coffee machine tamping and water supply integrated device according to an embodiment of the present invention, when the tamping sleeve is at the bottom and hot water is supplied.

[0045] Figure 12 This is a schematic diagram of the overall structure of the cover body according to an embodiment of the present utility model;

[0046] Figure 13 This is a cross-sectional structural schematic diagram of the cover body according to an embodiment of the present utility model;

[0047] Figure 14 This is a schematic diagram of the overall structure of the powder pressing sleeve and its connecting parts according to an embodiment of the present utility model;

[0048] Figure 15 This is a schematic diagram of the overall structure of the powder pressing sleeve and its connecting parts from another perspective of an embodiment of this utility model;

[0049] Figure 16 This is an exploded structural diagram of the powder pressing sleeve and its connecting parts according to an embodiment of the present utility model;

[0050] Figure 17 This is a cross-sectional view of the powder pressing sleeve according to an embodiment of the present utility model;

[0051] Figure 18 This is a cross-sectional view of the water outlet of an embodiment of the present invention.

[0052] Figure 19 This is a three-dimensional structural diagram of the water outlet of an embodiment of the present utility model;

[0053] Figure 20 This is a three-dimensional structural schematic diagram of the water outlet from another perspective of an embodiment of this utility model;

[0054] Figure 21 This is another overall structural diagram of the coffee machine tamping and water supply integrated device in the tamping sleeve reset state according to an embodiment of this utility model. Detailed Implementation

[0055] like Figures 1 to 21 As shown, the automatic pressure coffee machine of this embodiment includes a body assembly 1, a water tank 2, a bean hopper 3 for holding coffee beans, a control panel 4, a brewing port assembly 5, a boiler assembly 200 for producing hot water by electric heating, a pumping and piping valve assembly for pumping hot water to brew coffee and pumping cold water to provide high-pressure water for tamping coffee, a grinding device 300 for grinding coffee beans into coffee powder, and an integrated coffee tamping and water supply device.

[0056] The integrated tamping and water supply device is located above the extraction handle assembly 5 and includes a cap body 6 fixedly connected to the body assembly 1 and a tamping sleeve 7 sleeved on the outside of the cap body 6. The tamping sleeve 7 is axially movable and always maintains a sealed fit with the cap body 6. A return spring 9 is sleeved on the outer periphery of the tamping sleeve 7. The cap body 6 is connected to a hot water inlet 20 for coffee extraction, a high-pressure cold water inlet 30, and a high-pressure cold water outlet 40. The cap body 6 has an axially penetrating hot water channel 60 at its center and an eccentrically axially penetrating high-pressure cold water channel 62. The tamping sleeve 7 has an axially penetrating hot water channel 710 at its center of its inner cavity 711, which is isolated from the inner cavity 711. The bottom of the tamping sleeve 7 has a water distribution plate 78 with several nozzles for distributing the extraction hot water. During operation, the... The solenoid valve on the high-pressure cold water drain port 40 side is closed, and high-pressure cold water enters the high-pressure cold water channel 62 from the high-pressure cold water inlet 30 and flows into the inner cavity 711 of the tamping sleeve 7. Under the action of water pressure, the tamping sleeve 7 moves downward until its bottom abuts against the coffee powder in the extraction handle assembly 5 and compacts it. Then, a measured amount of hot water enters the hot water channel 60 from the hot water inlet 20 and is transported from the water distribution plate 78 through the hot water channel 710 to the coffee powder in the extraction handle assembly 5 for extraction. After the hot water supply is completed, the solenoid valve on the high-pressure cold water drain port 40 side is opened, and the high-pressure cold water in the inner cavity 711 of the tamping sleeve 7 is discharged in reverse through the high-pressure cold water channel 62 and the high-pressure cold water drain port 40. Under the action of the return spring 9, the tamping sleeve 7 is pushed upward and reset.

[0057] Specifically, in this embodiment, the body assembly 1 includes a base plate 10, and a first side plate 11, a second side plate 12, an outer end plate 13, an inner end plate 14, and a middle end plate 15 that are connected to each other to form a frame structure and are integrally connected to the base plate 10. The cover body 6 is provided with two opposing outward support arms 61, and the two support arms 61 are fixedly connected to the first side plate 11 and the second side plate 12 respectively.

[0058] Furthermore, the upper part of the powder pressing sleeve 7 is provided with two opposing outwardly protruding limiting arms 72. The outer end plate 13 and the middle end plate 15 are respectively provided with a first guide groove 130 and a second guide groove 150. The two limiting arms 72 are respectively located in the first guide groove 130 and the second guide groove 150 and can move up and down. When the limiting arms 72 are located at the top and bottom of the first guide groove 130 and the second guide groove 150, they respectively limit the highest point of the powder pressing sleeve 7 when it is reset upward and the lowest point of the powder pressing downward.

[0059] Furthermore, the upper and lower ends of the reset spring 9 press against the two limiting arms 72 and the base plate 10 respectively to be limited.

[0060] Furthermore, a position sensor 81 is provided on the limiting arm 72 located in the second guide groove 150, and a position switch 82 is provided on the outer side of the intermediate end plate 15 at the lowest point of the second guide groove 150. When the tamping sleeve 7 moves downward to the bottom to compact the coffee powder, the position sensor 81 causes the position switch 82 to close, and the high-pressure cold water stops entering the high-pressure cold water channel 62 from the high-pressure cold water inlet 30 and maintains pressure.

[0061] Specifically, in this embodiment, the position switch 82 is a push-button microswitch, and the position sensor 81 is a pressure block. Of course, the position switch and the position sensor that cooperates with it can also be in other forms, for example: the position switch 82 is a reed switch, and the position sensor 81 is a magnetic block; or, the position switch 82 is a photoelectric switch, and the position sensor 81 is a light-shielding / reflective element.

[0062] Furthermore, after the powder pressing sleeve 7 is connected to the capping body 6, the outer wall of the hot water channel 710 extends into the hot water flow channel 60. The hot water flow channel 60 has an embedding groove 64 in the middle, and an insert ring 68 is embedded in the embedding groove 64. The insert ring 68 has a first sealing ring 680, so that when the powder pressing sleeve 7 moves axially relative to the capping body 6, the outer wall of the hot water channel 710 remains sealed with the first sealing ring 680, thereby isolating the hot water flow channel 60, the hot water channel 710 and the inner cavity 711 of the powder pressing sleeve 7.

[0063] Furthermore, the top of the pressure cap 6 is connected to an inlet / outlet connector 65. The hot water inlet 20, the high-pressure cold water inlet 30, and the high-pressure cold water outlet 40 are all located on the upper part of the inlet / outlet connector 65. The lower part of the inlet / outlet connector 65 leads out a hot water conduit 650 communicating with the hot water inlet 20 and a cold water conduit 340 communicating with the high-pressure cold water inlet 30 and the high-pressure cold water outlet 40, respectively. The connection between the hot water conduit 650, the cold water conduit 340 and the pressure cap 6 is sealed by a second sealing ring 651 and a third sealing ring 341, respectively.

[0064] Furthermore, a valve core 74 is provided at the top of the hot water channel 710. The valve core 74 is located inside the hot water flow channel 60. The valve core 74 includes a circular plate 740 located in the middle, an upper shaft 743 and a lower shaft 742 located above and below the circular plate 740, respectively, and a conical sealing part 741 located between the circular plate 740 and the lower shaft 742. A water passage groove 744 is provided on the outer edge of the circular plate 740. The outer diameter of the circular plate 740 is adapted to the inner diameter of the hot water flow channel 60 so that the valve core 74 can slide up and down along the hot water flow channel 60. The lower shaft 742 is inserted into the hot water channel 710. A first conical spring 66 is also provided inside the hot water flow channel 60. The bottom of the first conical spring 66 is sleeved on the... On the upper shaft 743, the top of the first conical spring 66 is positioned within the hot water conduit 650. In the reset state of the powder pressing sleeve 7, the first conical spring 66 presses the valve core 74 downwards, causing the conical sealing part 741 to match and seal with the inner chamfer at the top of the hot water channel 710, preventing hot water from entering the hot water channel 710. When the powder pressing sleeve 7 moves downwards to the bottom and is in the hot water supply state, the first conical spring 66 no longer presses the valve core 74, and hot water enters the hot water flow channel 60 below the circular plate 740 through the water passage 744, causing the valve core 74 to float up and no longer seal the top of the hot water channel 710, allowing hot water to flow into the hot water channel 710.

[0065] Furthermore, the bottom of the capping body 6 is provided with an annular groove 63 for fitting a piston ring 630, so that when the powder pressing sleeve 7 moves axially relative to the capping body 6, the bottom of the capping body 6 is kept sealed to the side wall of the inner cavity 711 of the powder pressing sleeve 7 by the piston ring 630.

[0066] Furthermore, the lower part of the hot water channel 710 is provided with an enlarged lower cavity 712 with internal threads. The top of the lower cavity 712 is provided with a constriction 714. A water outlet 77 is connected to the lower cavity 712 via external threads. The top of the water outlet 77 is provided with a water outlet cavity 770. The water outlet cavity 770 is provided with a central column 771 and a water outlet hole 773 at the bottom. The water outlet cavity 770 is also provided with a second conical spring 76, the root of which is sleeved on the central column 771. The top of the second conical spring 76 is connected to a stopper cap 75. When hot water is not supplied, the second conical spring 76 pushes the stopper cap 75 upward, so that the stopper cap 75 closes the constriction 714, preventing the hot water remaining in the hot water channel 60 from flowing out. When hot water is supplied, the water pressure pushes the stopper cap 75 downward, and the hot water in the hot water channel 60 flows from the constriction 714 through the water outlet cavity 770, and then flows out from the water distribution plate 78 through the water outlet hole 773.

[0067] Furthermore, the bottom of the central column 771 is provided with a blind hole 772 communicating with the outside, for connecting and fixing the water distribution plate 78 to the blind hole 772 by self-tapping screws.

[0068] Furthermore, the lower part of the cylinder 71 of the tamping sleeve 7 is provided with an annular groove 713 for fitting a sealing ring 73, so that the tamping sleeve 7 moves downward until the bottom to compact the coffee powder and deliver hot water to the coffee powder in the extraction handle assembly 5. The lower part of the cylinder 71 is kept sealed to the powder compartment of the extraction handle assembly 5 by the sealing ring 73.

[0069] It should be noted that the control panel 4 and its electrical control device, the pump and pipeline valve assembly, and other necessary electrical and structural components are not the key features of this utility model. Those skilled in the art can directly adopt existing components or make slight modifications based on existing technology, and will not be elaborated here.

[0070] This utility model's integrated coffee maker tamping and water supply device overcomes the defects and shortcomings of existing technologies. Through the ingenious design of the pressure cap and the tamping sleeve, hot and cold water are separated. Utilizing the water tank and pumping device of existing pressure coffee machines, high-pressure cold water is used as the power source for tamping. After the coffee powder is obtained by the extraction handle assembly, the tamping and extraction processes are integrated into one. After automatic tamping, the coffee powder is automatically brewed and extracted, making the coffee grinding, tamping, and extraction processes work together to achieve automatic coffee production without manual operation, making it convenient to use. Therefore, this integrated coffee maker tamping and water supply device integrates the automatic tamping and water supply processes after coffee grinding into one unit, eliminating the need for manual operation, facilitating the linkage between the tamping and extraction processes after coffee grinding to achieve automatic coffee production. It also boasts high integration, saves space, reduces parts, and saves costs. Furthermore, this utility model of an automatic pressure coffee machine overcomes the defects and shortcomings of existing technologies and the biases of existing technologies in this field. It not only integrates the bean hopper, grinding device, tamping device, extraction portafilter assembly, boiler assembly, pumping assembly, and extraction hot water supply assembly into one unit, but also realizes the interconnection of coffee powder grinding, tamping, and pressure extraction processes to achieve automatic coffee production. It is easy to use and operate. When making coffee, you only need to put the coffee beans into the bean hopper and connect the extraction portafilter assembly to realize the entire coffee production process fully automatically completed on one appliance. There is no need to transfer equipment, reducing the waiting time for manual intervention. It is easy to use and operate, and at the same time, it has a high degree of integration, occupies little space, and improves the neatness and uniformity of coffee machine use and storage. It is a multi-functional integrated fully automatic pressure coffee machine.

[0071] This invention can be widely applied in the field of coffee brewing equipment.

Claims

1. A coffee machine tamping and water supply integrated device, the coffee machine comprising a body assembly (1) and an extraction port assembly (5), characterized in that: The integrated tamping and water supply device is located above the extraction handle assembly (5), and includes a cap body (6) fixedly connected to the body assembly (1) and a tamping sleeve (7) sleeved on the outside of the cap body (6). The tamping sleeve (7) is axially movable and always maintains a sealed fit with the cap body (6). A return spring (9) is sleeved on the outer periphery of the tamping sleeve (7). The cap body (6) is connected to a hot water inlet (20) for coffee extraction and a high-pressure cold water inlet. The pressure cap body (6) has an inlet (30) and a high-pressure cold water outlet (40). The center of the pressure cap body (6) has an axially penetrating hot water channel (60), and an eccentrically axially penetrating high-pressure cold water channel (62). The center of the inner cavity (711) of the powder pressing sleeve (7) has an axially penetrating hot water channel (710) isolated from the inner cavity (711). The bottom of the powder pressing sleeve (7) has a water distribution plate (78) with several nozzles for distributing the extracted hot water. During operation, the… The solenoid valve on the high-pressure cold water drain port (40) side is closed, and high-pressure cold water enters the high-pressure cold water channel (62) from the high-pressure cold water inlet (30) and flows into the inner cavity (711) of the tamping sleeve (7). Under the action of water pressure, the tamping sleeve (7) moves downward until the bottom abuts against the coffee powder in the extraction handle assembly (5) and compacts it. Then, a measured amount of hot water enters the hot water channel (60) from the hot water inlet (20) and flows through the... Hot water channel (710) delivers water from the water distribution plate (78) to the coffee powder in the extraction handle assembly (5) for extraction; after the hot water supply is completed, the solenoid valve on the side of the high-pressure cold water drain port (40) opens, and the high-pressure cold water in the inner cavity (711) of the tamping sleeve (7) is discharged in reverse through the high-pressure cold water flow channel (62) and the high-pressure cold water drain port (40). Under the action of the reset spring (9), the tamping sleeve (7) is pushed upward and reset.

2. The integrated coffee machine tamping and water supply device according to claim 1, characterized in that: The fuselage assembly (1) includes a base plate (10), and a first side plate (11), a second side plate (12), an outer end plate (13), an inner end plate (14), and a middle end plate (15) that are connected to each other to form a frame structure and are integrated with the base plate (10). The cover body (6) is provided with two opposing outward support arms (61), and the two support arms (61) are fixedly connected to the first side plate (11) and the second side plate (12) respectively.

3. The integrated coffee machine tamping and water supply device according to claim 2, characterized in that: The upper part of the powder pressing sleeve (7) is provided with two opposing outwardly protruding limiting arms (72). The outer end plate (13) and the middle end plate (15) are respectively provided with a first guide groove (130) and a second guide groove (150). The two limiting arms (72) are respectively located in the first guide groove (130) and the second guide groove (150) and can move up and down. When the limiting arms (72) are located at the top and bottom of the first guide groove (130) and the second guide groove (150), they respectively limit the highest point of the powder pressing sleeve (7) when it is reset upward and the lowest point of the powder pressing downward.

4. The integrated coffee machine tamping and water supply device according to claim 3, characterized in that: The upper and lower ends of the return spring (9) press against the two limiting arms (72) and the base plate (10) respectively to be limited.

5. The integrated coffee machine tamping and water supply device according to claim 3, characterized in that: A position sensor (81) is provided on the limiting arm (72) located in the second guide groove (150). A position switch (82) is provided on the outer side of the middle end plate (15) at the lowest point of the second guide groove (150). When the tamping sleeve (7) moves down to the bottom to tamp the coffee powder, the position sensor (81) closes the position switch (82), and the high-pressure cold water stops entering the high-pressure cold water channel (62) from the high-pressure cold water inlet (30) and maintains pressure.

6. The integrated coffee machine tamping and water supply device according to claim 5, characterized in that: The position switch (82) is a push-button micro switch, and the position sensor (81) is a top pressure block; or, the position switch (82) is a reed switch, and the position sensor (81) is a magnetic block; or, the position switch (82) is a photoelectric switch, and the position sensor (81) is a light-shielding / reflecting element.

7. The integrated coffee machine tamping and water supply device according to claim 1, characterized in that: After the powder pressing sleeve (7) is connected to the capping body (6), the outer wall of the hot water channel (710) extends into the hot water flow channel (60). The hot water flow channel (60) is provided with an embedding groove (64) in the middle. An embedded ring (68) is embedded in the embedding groove (64). A first sealing ring (680) is provided in the embedded ring (68) so that when the powder pressing sleeve (7) moves axially relative to the capping body (6), the outer wall of the hot water channel (710) remains sealed with the first sealing ring (680), so that the hot water flow channel (60), the hot water channel (710) and the inner cavity (711) of the powder pressing sleeve (7) are isolated.

8. The integrated coffee machine tamping and water supply device according to claim 1, characterized in that: The top of the cap body (6) is connected to the inlet and outlet water connector (65). The hot water inlet (20), the high-pressure cold water inlet (30), and the high-pressure cold water outlet (40) are all located on the upper part of the inlet and outlet water connector (65). The lower part of the inlet and outlet water connector (65) leads out a hot water conduit (650) that communicates with the hot water inlet (20) and a cold water conduit (340) that communicates with the high-pressure cold water inlet (30) and the high-pressure cold water outlet (40). The connection between the hot water conduit (650), the cold water conduit (340) and the cap body (6) is sealed by the second sealing ring (651) and the third sealing ring (341), respectively.

9. The integrated coffee machine tamping and water supply device according to claim 8, characterized in that: A valve core (74) is provided at the top of the hot water channel (710). The valve core (74) is located inside the hot water flow channel (60). The valve core (74) includes a circular plate (740) located in the middle, an upper shaft (743) and a lower shaft (742) located above and below the circular plate (740) respectively, and a conical sealing part (741) located between the circular plate (740) and the lower shaft (742). A water passage groove (744) is provided on the outer edge of the circular plate (740). The outer diameter of the circular plate (740) is adapted to the inner diameter of the hot water flow channel (60) so that the valve core (74) can slide up and down along the hot water flow channel (60). The lower shaft (742) is inserted into the hot water channel (710). A first conical spring (66) is also provided inside the hot water flow channel (60). The bottom of the first conical spring (66) is sleeved on... On the upper shaft (743), the top of the first conical spring (66) is limited to the hot water conduit (650). In the reset state of the powder pressing sleeve (7), the first conical spring (66) presses the valve core (74) downward, so that the conical sealing part (741) matches and seals the inner chamfer at the top of the hot water channel (710), preventing hot water from entering the hot water channel (710). When the powder pressing sleeve (7) moves downward to the bottom and is in the state of supplying hot water, the first conical spring (66) no longer presses the valve core (74), and the hot water enters the hot water flow channel (60) below the circular plate (740) through the water channel (744), causing the valve core (74) to float up and no longer seal the top of the hot water channel (710), and the hot water flows into the hot water channel (710).

10. The integrated coffee machine tamping and water supply device according to claim 1, characterized in that: The bottom of the capping body (6) is provided with an annular groove (63) for fitting a piston ring (630) so that when the powder pressing sleeve (7) moves axially relative to the capping body (6), the bottom of the capping body (6) is sealed to the side wall of the inner cavity (711) of the powder pressing sleeve (7) by the piston ring (630).

11. The integrated coffee machine tamping and water supply device according to claim 1, characterized in that: The lower part of the hot water channel (710) is provided with an enlarged lower cavity (712) with internal threads. The top of the lower cavity (712) is provided with a constriction (714). A water outlet (77) is connected to the lower cavity (712) through external threads. The top of the water outlet (77) is provided with a water outlet cavity (770). The water outlet cavity (770) is provided with a central column (771) and a water outlet hole (773) at the bottom. The water outlet cavity (770) is also provided with a second conical spring (76). The root of the second conical spring (76) is sleeved on the central column (771). The top of the second conical spring (76) is connected to a stopper cap (75), which is used to press the stopper cap (75) upward by the second conical spring (76) when hot water is not supplied, so that the stopper cap (75) seals the constriction (714) to prevent the hot water remaining in the hot water flow channel (60) from flowing out. When hot water is supplied, the stopper cap (75) is pressed down by water pressure, and the hot water in the hot water flow channel (60) flows from the constriction (714) through the water outlet cavity (770), and then flows out from the water distribution plate (78) through the water outlet hole (773).

12. The integrated coffee machine tamping and water supply device according to claim 11, characterized in that: The bottom of the central column (771) is provided with a blind hole (772) that communicates with the outside, and is used to connect and fix the water distribution plate (78) to the blind hole (772) by means of self-tapping screws.

13. The integrated coffee machine tamping and water supply device according to claim 1, characterized in that: The lower part of the cylinder (71) of the tamping sleeve (7) is provided with an annular groove (713) for fitting a sealing ring (73) so that the tamping sleeve (7) moves downward until the bottom is compacted with coffee powder and hot water is delivered to the coffee powder in the extraction handle assembly (5). The lower part of the cylinder (71) is sealed to the powder compartment of the extraction handle assembly (5) by the sealing ring (73).

14. An automatic pressure coffee machine, characterized in that: The device includes a water tank (2), a bean hopper (3) for holding coffee beans, a control panel (4), a boiler assembly (200) for generating hot water by electric heating, a pumping and piping valve assembly for pumping hot water to brew coffee and pumping cold water to provide high-pressure water for tamping coffee, a grinding device (300) for grinding coffee beans into coffee powder, and the integrated coffee tamping and water supply device for coffee machines as described in any one of claims 1 to 13.

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