Electric pneumatic coffee machine

Abstract

The utility model discloses an electric pressure coffee machine, including the main body with water storage cavity, the filter screen subassembly of detachable installation in the main body lower mouth part and the upper cover of detachable installation in the main body upper mouth part, be equipped with the pressure generating device in the upper cover, and the pressure generating device includes control circuit board, air pump, gas nozzle and power supply, and the air inlet of air pump is linked together with outside atmosphere, and the air outlet of air pump is linked together with water storage cavity top end through gas nozzle, and air pump is based on the control of control circuit board and carries out physical pressurization to water storage cavity to accelerate coffee extraction speed. The whole machine volume of coffee machine is small, and the weight is light, and the carrying is convenient, and the pressure is not big, and the reliability is high, and still compatible and applicable american coffee capsule. When using, air pump can send the outside air into the main body and pressurize, and let the hot water in water storage cavity and the coffee powder set up in filter screen subassembly carry out extraction under pressure, thereby the coffee of high concentration, good taste is made in large quantities rapidly.

Description

Technical Field

[0001] This utility model relates to the field of coffee brewing equipment, and more particularly to an electric pneumatic coffee machine. Background Technology

[0002] Coffee machines commonly found on the market are divided into two types: American and Italian. Italian coffee machines pressurize hot water to about 9-15 atmospheres before it flows into the ground coffee in the metal filter. They extract coffee powder through high pressure to obtain a strong-tasting "espresso" and are usually used in commercial settings such as coffee shops and hotels. American coffee machines have a relatively simple structure and are generally divided into two layers. Hot water in the upper layer flows through the coffee powder into the coffee cup below. The extracted coffee has a weaker taste and is suitable for home use to quickly make coffee.

[0003] Chinese patent CN213721443U discloses a hand-drip rotary American coffee maker. It features a casing fixed above a lid-type base, a water cup fixed above the casing, and a filter assembly positioned above the hollow center of the lid-type base. The filter assembly connects to the water cup and is linked to a rotating mechanism below the cup. The rotating mechanism includes a motor and a gear set, which is connected to the filter assembly. The rotating mechanism drives the filter to rotate, ensuring even contact between the coffee grounds and water. While this technical solution improves the extraction effect to some extent by adding a rotating mechanism to increase the contact between coffee grounds and water, the rotating mechanism is not only structurally complex but also fails to improve coffee extraction efficiency and cannot meet the practical needs of rapid, large-volume coffee production.

[0004] In addition, Chinese patent CN202121841591.7 discloses a pressure coffee filter device, including a coffee pot and a hand-operated air pump connected to the coffee pot. When making coffee, the hand-operated air pump is used to pressurize the coffee pot to accelerate the extraction speed. However, the operation of the hand-operated air pump is cumbersome and the degree of automation is not high, which is not conducive to the actual needs of rapid mass production of coffee. Utility Model Content

[0005] This invention aims to at least address the practical need for rapid, large-volume coffee production that existing coffee machines cannot meet. It proposes an electric pneumatic coffee machine that uses a pneumatic generator to physically pressurize the coffee during extraction, thereby increasing the extraction speed. The machine is easy to operate and use, and can quickly produce large quantities of rich-flavored Americano coffee.

[0006] This utility model proposes an electric pneumatic coffee machine, including a main body 1 with a water storage chamber 10, a filter assembly 2 detachably installed at the lower opening of the main body 1, and a top cover 4 detachably installed at the upper opening of the main body 1; a pressure generating device 5 is provided inside the top cover 4, the pressure generating device 5 includes a control circuit board 51, an air pump 52, an air nozzle 53, and a power supply 54. The air inlet of the air pump 52 is connected to the outside atmosphere, and the air outlet of the air pump 52 is connected to the top of the water storage chamber 10 through the air nozzle 53. The air pump 52 applies physical pressure to the water storage chamber 10 based on the control of the control circuit board 51 to accelerate the coffee extraction speed.

[0007] In some embodiments, the filter assembly 2 includes a lower box 21, a filter box 22, and a partition mesh 23; the filter box 22 is fixed to the lower opening of the main body 1 by the lower box 21, and the filter box 22 is provided with a plurality of uniform and fine first filter holes for filtering coffee at least at the bottom; a first sealing ring 3 is provided between the lower box 21 and the lower opening of the main body 1, and the first sealing ring 3 is wrapped around the outer periphery of the partition mesh 23.

[0008] In some embodiments, the inner wall of the bottom of the water storage cavity 10 is provided with an inner step 11, and the upper edge of the filter box 22 has a skirt portion 221 extending outward, which overlaps the upper end face of the lower box body 21; the first sealing ring 3 abuts between the inner step 11 and the skirt portion 221 of the filter box 22.

[0009] In some embodiments, the filter cartridge 22 is designed as a capsule filter cartridge 22' that can be adapted to the shape of an Americano coffee capsule 9. A lower needle 24 is provided at the bottom of the capsule filter cartridge 22'. A capsule cover 25 is also provided at the top of the capsule filter cartridge 22'. The capsule cover 25 covers the top of the capsule filter cartridge 22', and an upper needle 26 is provided on the bottom side of the capsule cover 25.

[0010] In some embodiments, the top cover 4 includes a cover body 41 having a receiving cavity 411 and a face cover 42 that can be sealed and closed on the top of the cover body 41; the air pressure generating device 5 is fixed in the receiving cavity 411, and the air nozzle 53 is fixed in the bottom of the receiving cavity 411.

[0011] In some embodiments, the cover 42 is made of soft rubber, and the peripheral side of the cover 42 extends downward to form a protective sleeve 429. When the cover 42 is assembled on the cover body 41, the cover 42 and the cover body 41 are tightly fitted and sealed around the periphery, and the protective sleeve 429 wraps around the outer periphery of the bracket 55.

[0012] In some embodiments, the upper cover 4 may also be provided with an air intake channel 43 that connects the receiving cavity 411 to the outside air, and the air inlet of the air pump 52 is connected to the air intake channel 43.

[0013] In some embodiments, a bracket 55 is provided in the receiving cavity 411, and a control circuit board 51 is locked to the lower side of the bracket 55; the bracket 55 has a plurality of studs 551 with screw holes, and a first screw 56 passes through the screw hole of the stud 551 and is screwed and fixed to the bottom of the receiving cavity 411.

[0014] In some embodiments, the upper surface of the control circuit board 51 is provided with a switch 511, a charging socket 512, a power indicator light 513, and a working indicator light 514. The bracket 55 is provided with clearance grooves corresponding to the switch 511, the charging socket 512, the power indicator light 513, and the working indicator light 514. The cover 42 is provided with a button 421, a slot 423, and a groove pattern 422 corresponding to the positions of the switch 511, the charging socket 512, and the power indicator light 513. The button 421 abuts against the switch 511, the end of the charging socket 512 is located in the slot 423, and the groove pattern 422 is set opposite to the power indicator light 513.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This electric pneumatic coffee maker is simple and convenient to operate. The pneumatic generator 5 pressurizes the water storage chamber 10, causing hot water to flow quickly down into the filter box 22, thus quickly producing coffee with good taste and high concentration, meeting the actual needs of making large quantities of coffee quickly. In addition, the pressure generated by the pneumatic generator 5 can also cause water to quickly separate from the coffee grounds 8 in the filter box 22, so that the coffee grounds left in the filter box 22 are dry and intact, making it convenient to quickly pour out the coffee grounds from the filter box 22 and replace them with unbrewed coffee grounds 8.

[0016] 2. The air pressure generating device 5 is located inside the upper cover 4 and above the water storage chamber 10 of the main body 1, which helps to protect the air pressure generating device 5 from the influence of water in the water storage chamber 10, and ensures stable and reliable operation.

[0017] 3. Since the air pressure generating device 5 is built into the upper cover 4 and does not occupy the space of the main body 1, the water storage chamber 10 of the main body 1 can be designed with a larger volume.

[0018] 4. The coffee machine is small in size and light in weight, making it easy to carry. It has low pressure, high reliability, and is compatible with American coffee capsules, thus having a wider range of applications and making it more convenient for users. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of one embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the internal structure of one embodiment of the present invention, with arrows indicating the airflow direction.

[0021] Figure 3 This is an exploded structural diagram of one embodiment of the present invention.

[0022] Figure 4 This is an exploded structural diagram of the top cover.

[0023] Figure 5 This is a schematic diagram of the internal structure of another embodiment of the present invention.

[0024] Figure 6 Is the filter box in? Figure 5 A schematic diagram of the exploded structure in the illustrated embodiment.

[0025] The meanings of the labels in the diagram are as follows: 1-Main body, 10-Water storage cavity, 11-Inner step, 12-Insulation sleeve, 13-Viewing window; 2-Filter assembly, 21-Lower box, 22-Filter box, 221-Skirt, 22'-Capsule filter box 23-Groove, 24-Lower needle, 25-Capsule cap, 26-Upper needle; 3-First sealing ring; 4-Top cover, 41-Cover body, 411-Receiving cavity, 42-Face cover, 421-Button, 422-Groove pattern, 423-Slot, 429-Protective cover, 43-Air intake channel; 5-Air pressure generator, 51-Control circuit board, 511-Switch, 512-Charging socket, 513-Power indicator light, 514-Work indicator light, 515-Control chip, 516-First through hole, 517-Second through hole, 52-Air pump, 53-Air nozzle, 54-Power supply, 55-Bracket, 551-Stud, 56-First screw, 57-Second screw; 6-Second sealing ring; 7-Coffee cup; 8-Coffee powder; 9-Americano coffee capsules. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by this application to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0027] Combination Figures 1-4As shown, this utility model discloses an electric pneumatic coffee maker (hereinafter referred to as "coffee maker"), including a main body 1 with a water storage chamber 10, a filter assembly 2 detachably installed at the lower opening of the main body 1, and a top cover 4 detachably installed at the upper opening of the main body 1. The top cover 4 is screwed onto the upper opening of the main body 1, and a second sealing ring 6 is provided between the top cover 4 and the upper opening of the main body 1 for sealing, so that the top cover 4 and the upper opening of the main body 1 are sealed together by the second sealing ring 6. The filter assembly 2 is screwed onto the lower opening of the main body 1, and a first sealing ring 3 is provided between the filter assembly 2 and the lower opening of the main body 1 for sealing connection.

[0028] The filter assembly 2 includes a lower housing 21, a filter cartridge 22, and a separator 23. Coffee powder 8 is placed inside the filter cartridge 22, which has a plurality of uniformly small first filter holes at least at the bottom for filtering coffee. The filter cartridge 22 is fixed to the lower opening of the main body 1 by the lower housing 21, while the separator 23 is located above the filter cartridge 22 to prevent the coffee powder 8 placed inside the filter cartridge 22 from rising into the water storage chamber 10 of the main body 1.

[0029] The lower box 21 is generally cylindrical and is screwed onto the lower opening of the main body 1. The lower box 21 and the filter box 22 can be an integral structure or separate structures. In order to accommodate filter boxes 22 of different shapes, the lower box 21 and the filter box 22 are usually designed as separate structures.

[0030] The filter cartridge 22 is fitted inside the lower housing 21. The upper edge of the filter cartridge 22 has an outwardly extending skirt 221 that overlaps the upper surface of the lower housing 21. In addition, the inner wall of the main body 1 at the bottom of the water storage chamber 10 has an inner step 11. When the lower housing 21 is screwed onto the lower part of the main body 1, the first sealing ring 3 abuts against the inner step 11 and the skirt 221 of the filter cartridge 22, so that the connection between the lower housing 21 and the lower opening of the main body 1 is sealed, so that water leakage or pressure leakage will not occur, ensuring that the water in the water storage chamber 10 can only flow downward through the filter cartridge 22 to extract the coffee powder 8 inside the filter cartridge 22.

[0031] To facilitate the assembly of the mesh 23, in some embodiments, an installation groove is provided on the inner side wall of the first sealing ring 3. The mesh 23 is positioned within the installation groove of the first sealing ring 3, allowing the first sealing ring 3 to wrap around the outer periphery of the mesh 23. The limiting relationship between the installation groove and the periphery of the mesh 23 makes it difficult for the two to separate. This allows the user to simultaneously install the mesh 23 and the first sealing ring 3 during the process of disassembling and assembling the filter assembly 2 relative to the main body 1 to replace the coffee powder 8 in the filter box 22, simplifying the operation and making it more convenient for the user.

[0032] The screen 23 is provided with several uniform and fine second filter holes. The screen 23 is pressed onto the filter box 22 by the first sealing ring 3, so that the water in the water storage chamber 10 flows down into the filter box 22 through the second filter holes and is extracted with the coffee powder 8 in the filter box 22. At the same time, the coffee powder 8 in the filter box 22 cannot pass through the second filter holes and enter the water storage chamber 10 of the main body 1.

[0033] Similarly, the first filter hole of the filter cartridge 22 is small enough to prevent coffee powder 8 from passing through, while allowing coffee liquid to flow down through the first filter hole.

[0034] In addition, the pore size of the first and second filter holes affects the flow rate of water or coffee liquid, thus affecting the coffee extraction efficiency. Typically, the pore size of the first and second filter holes is set to no more than 0.3 mm.

[0035] The coffee machine also includes a coffee cup 7 located below the filter assembly 2. The coffee cup 7 is used to collect the coffee liquid that flows out after being filtered and extracted by the filter assembly 2. The coffee cup 7 can be detachably connected to the main body 1 or the lower box 21 by means of plugging, screwing, or other methods.

[0036] To improve the extraction efficiency of the coffee machine and meet the actual need for rapid and large-volume coffee production, the coffee machine of this application has an air pressure generating device 5 inside the top cover 4. The air pressure generating device 5 includes a control circuit board 51, an air pump 52, an air nozzle 53, and a power supply 54. The power supply 54 is used to provide working power to the control circuit board 51 and the air pump 52. The power supply 54 is a rechargeable battery or an external power source. The air inlet of the air pump 52 is connected to the outside atmosphere, and the air outlet of the air pump 52 is connected to the top of the water storage chamber 10 through the air nozzle 53. The air pump 52 increases the air pressure in the water storage chamber 10 based on the control of the control circuit board 51 to accelerate the coffee extraction speed.

[0037] During the coffee extraction process, the control circuit board 51 controls the air pump 52 to work. After the air pump 52 draws air from the outside through the air inlet, it sends the air into the top space of the water storage chamber 10 through the air nozzle 53 from the air outlet of the air pump 52. This increases the air pressure in the water storage chamber 10, which causes the water in the water storage chamber 10 to flow down through the filter assembly 2, thereby increasing the coffee extraction speed and meeting the actual needs of making coffee quickly and in large quantities.

[0038] Because the air pressure generating device 5 is located inside the upper cover 4, above the top of the water storage chamber 10, water in the water storage chamber 10 cannot easily enter upwards through the air nozzle 53 during use. At the same time, since the air pump 52 itself is a device that can block water from entering, water in the water storage chamber 10 will not enter the upper cover 4 and damage the control circuit board 51.

[0039] In some embodiments, the top cover 4 includes a cover body 41 having a receiving cavity 411 and a face cover 42 that can be sealed to the top of the cover body 41. The air pressure generating device 5 is fixed inside the receiving cavity 411, and the air nozzle 53 is fixed to the bottom of the receiving cavity 411, ensuring that the air nozzle 53 passes through the bottom of the receiving cavity 411 and communicates with the top of the water storage cavity 10 of the main body 1, and also simplifies the assembly between the air nozzle 53 and the air pump 52.

[0040] Furthermore, the upper cover 4 can also be provided with an air intake channel 43. The air intake port of the air pump 52 is connected to the outside air through the air intake channel 43. Thus, after the air pump 52 draws in air from the outside through the air intake channel 43, it can send the air into the water storage chamber 10 of the main body 1 through the air nozzle 53, thereby increasing the pressure of the water storage chamber 10 and improving the extraction efficiency of coffee making by the coffee machine. Among them, the air pressure generating device 5 is fixed in the receiving cavity 411. In the embodiment shown in the figure, the air pressure generating device 5 also includes a bracket 55, which has multiple studs 551 with screw holes. The control circuit board 51 is provided with multiple first through holes 516 and second through holes 517. After the studs 551 of the bracket 55 pass through the first through holes 516 of the control circuit board 51, the control circuit board 51 is locked to the lower side of the bracket 55 by the second screws 57 passing through the second through holes 517. The bracket 55 is screwed into the bottom of the receiving cavity 411 by the first screws 56 passing through the screw holes of the studs 551, thereby locking it in the receiving cavity 411.

[0041] The air pump 52 and the power supply 54 are located between multiple studs 551 of the bracket 55. When the bracket 55 is locked to the bottom of the receiving cavity 411 by the first screw 56, the air pump 52 and the power supply 54 are pressed and fixed, thus simplifying the assembly.

[0042] The upper surface of the control circuit board 51 is provided with a switch 511, a charging socket 512, a power indicator light 513, a working indicator light 514, and a control chip 515. The switch 511 is electrically connected between the power supply 54 and the air pump 52; the charging socket 512 is used to charge the power supply 54; the power indicator light 513 is used to indicate the power level of the power supply 54; the working indicator light 514 is used to indicate whether the coffee machine is powered on and is working, and the working indicator light 514 is located near the switch 511; the control chip 515 is generally implemented using a microcontroller and is mainly used to control the operation of the air pump 52.

[0043] The bracket 55 has clearance slots corresponding to the switch 511, charging socket 512, power indicator 513, and working indicator 514, so that when the control circuit board 51 is locked to the lower side of the bracket by the second screw 57, the switch 511, charging socket 512, power indicator 513, and working indicator 514 pass upward through the clearance slots of the bracket 55.

[0044] The cover 42 is usually made of soft rubber. The peripheral side of the cover 42 extends downward to form a protective sleeve 429. When the cover 42 is assembled with the cover body 41, the cover 42 and the cover body 41 are tightly sealed around the periphery. The protective sleeve 429 wraps around the outer periphery of the bracket 55 to achieve positioning and assembly, ensuring that even if the seal between the cover 42 and the cover body 41 is reliable, water will not enter, thereby protecting the control circuit board 51 and improving the working reliability of the coffee machine.

[0045] The faceplate 42 has a button 421, a slot 423, and a recessed pattern 422 corresponding to the positions of the switch 511, charging port 512, and power indicator light 513, respectively. The button 421 abuts against the switch 511, allowing the user to turn the coffee machine on or off by pressing the button 421. The end of the charging port 512 is located within the slot 423 of the faceplate 42, facilitating on-demand charging of the power supply 54. The recessed pattern 422 is thin and faces the power indicator light 513, allowing light to pass through clearly for easy and clear display.

[0046] In this embodiment, the power supply 54 uses a rechargeable polymer lithium battery with a capacity of 500~1000mAh and a voltage of 3.7V, and has a small size; the air pump 52 uses a commercially available DC miniature air pump with a rated operating voltage of 3~5V, a maximum air pressure of 0.7bar, and a maximum power of only 2W, which is small in size, consumes little energy, and can be used many times on a single charge; the charging port 512 adopts the widely used Type-C interface for convenient charging operation.

[0047] Furthermore, those skilled in the art will understand that the control chip 515 on the control circuit board 51 can be set with a timer to automatically shut down the power at a set time. Typically, the set working time is 1 minute and 30 seconds. In this embodiment, the control chip 515 can also display the amount of power used by the power supply 54 via the power indicator light 513, and can also control the charging process, automatically stopping charging when fully charged, ensuring safety, reliability, and a high degree of automation.

[0048] The main body 1 is preferably made of PCTG transparent plastic, which is safe and environmentally friendly. Alternatively, a heat insulation sleeve 12 can be placed around the main body 1. The heat insulation sleeve 12 has a viewing window 13, allowing the user to easily observe the water level in the water storage chamber 10 during coffee machine use. Furthermore, it is preferable that the heat insulation sleeve 12 be made of silicone rubber, as it also serves to prevent scalding, maintain heat, and enhance aesthetics.

[0049] In use, first place a certain amount of coffee powder 8 into the filter box 22, level it, and then screw it together with the lower box body 21 to secure it to the lower opening of the main body 1. Then, pour hot water into the water storage chamber 10 of the main body 1, and tighten the top cover 4 to form a sealed space inside the water storage chamber 10 of the main body 1. Press the switch 511, and the power supply 54 supplies power to the air pump 52. The control circuit board 51 controls the air pump 52 to work. The air pump 52 draws in external air and injects air into the water storage chamber 10 through the air nozzle 53, which increases the pressure inside the water storage chamber 10 of the main body 1. Under pressure, the hot water flows down faster into the coffee powder 8 in the filter box 22. The hot water and coffee powder 8 are extracted, and the coffee liquid flows out after being filtered by the filter box 22 and flows down into the coffee cup 7.

[0050] When the coffee machine is in operation, the indicator light 514 near the switch 511 flashes, and the light is displayed through the cover 42. The power indicator light 513 is also displayed through the recessed pattern 422 on the cover 42, making it intuitive, clear, and easy to operate.

[0051] Therefore, the coffee machine of this application uses the air pressure generating device 5 to physically pressurize the hot water in the water storage chamber 10, which can quickly and efficiently extract soluble substances from the coffee in a short time, resulting in a beverage with a concentration far higher than that of hand-drip coffee. The extraction time for making a cup of coffee using the coffee machine of this application is only 30-60 seconds, making it an extremely efficient way to prepare coffee for cafes that need to serve quickly or for busy office workers in the morning.

[0052] Compared with the prior art, this application has the following beneficial effects: 1. This electric pneumatic coffee maker is simple and convenient to operate. The pneumatic generator 5 pressurizes the water storage chamber 10, causing hot water to flow quickly down into the filter box 22, thus quickly producing coffee with good taste and high concentration, meeting the actual needs of making large quantities of coffee quickly. In addition, the pressure generated by the pneumatic generator 5 can also cause water to quickly separate from the coffee grounds 8 in the filter box 22, so that the coffee grounds left in the filter box 22 are dry and intact, making it convenient to quickly pour out the coffee grounds from the filter box 22 and replace them with unbrewed coffee grounds 8.

[0053] 2. The air pressure generating device 5 is built inside the upper cover 4 and located above the water storage chamber 10 of the main body 1, which helps to protect the air pressure generating device 5 from the influence of water in the water storage chamber 10, and ensures stable and reliable operation.

[0054] 3. Since the air pressure generating device 5 is built into the upper cover 4 and does not occupy the space of the main body 1, the water storage chamber 10 of the main body 1 can be designed with a larger volume.

[0055] The main body (1) is relatively large, allowing it to hold a significant amount of water; however, its overall size is compact, lightweight, and easy to carry. This coffee machine operates on low pressure, requiring only 0.7 bar to quickly filter coffee, is leak-proof, and highly reliable.

[0056] Combination Figure 5 and Figure 6 As shown, in another preferred embodiment, the filter cartridge 22 is designed as a capsule filter cartridge 22' that can be adapted to the shape of an Americano coffee capsule 9. Specifically, a lower needle 24 is provided at the bottom of the capsule filter cartridge 22'; a capsule cap 25 is also provided at the top of the capsule filter cartridge 22', and the capsule cap 25 closes to the top of the capsule filter cartridge 22'. The capsule cap 25 is usually made of soft silicone rubber, and the capsule cap 25 has several water passage holes, and an upper needle 26 is provided on the bottom side of the capsule cap 25.

[0057] An Americano coffee capsule 9 is placed into the capsule filter cartridge 22'. The downward-pointing needle 24 at the bottom of the capsule filter cartridge 22' pierces the bottom of the Americano coffee capsule 9 upwards. Then, the capsule cap 25 is placed on top of the capsule filter cartridge 22', and the downward-pointing needle 24 pierces the top of the Americano coffee capsule 9 downwards. Then, the capsule filter cartridge 22' is screwed onto the lower opening of the main body 1 using the lower housing 21, so that the capsule cap 25 abuts against the first sealing ring 3 to achieve a sealed connection with the main body 1.

[0058] When the air pressure generating device 5 injects air into the water storage chamber 10 to increase the air pressure, the hot water added to the water storage chamber 10 will accelerate through the water passage of the capsule cover 25 and enter the capsule filter box 22'. It will then extract the coffee powder in the Americano coffee capsule 9 in the capsule filter box 22', and the coffee liquid will flow out through the capsule filter box 22' into the coffee cup 7 below. In this way, coffee can be made quickly using the coffee machine. It is simple to operate and convenient to use.

[0059] After the coffee is made, remove the lower box 21 from the main body 1, remove the capsule cap 25, and you can easily take out the used Americano coffee capsule 9 from the capsule filter box 22'. Replace the unused Americano coffee capsule 9 in the capsule filter box 22' to prepare for the next coffee making.

[0060] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electric pneumatic coffee maker, comprising a main body (1) having a water storage chamber (10), a filter assembly (2) detachably mounted on the lower opening of the main body (1), and a top cover (4) detachably mounted on the upper opening of the main body (1); characterized in that, An air pressure generating device (5) is provided inside the top cover (4). The air pressure generating device (5) includes a control circuit board (51), an air pump (52), an air nozzle (53), and a power supply (54). The air inlet of the air pump (52) is connected to the outside atmosphere, and the air outlet of the air pump (52) is connected to the top of the water storage chamber (10) through the air nozzle (53). The air pump (52) applies physical pressure to the water storage chamber (10) based on the control of the control circuit board (51) to accelerate the coffee extraction speed.

2. The electric pneumatic coffee machine according to claim 1, characterized in that: The upper surface of the control circuit board (51) is provided with a switch (511), a charging socket (512), a power indicator (513), and a working indicator (514); the air pressure generating device (5) also includes a bracket (55), on which a clearance groove is provided corresponding to the switch (511), the charging socket (512), the power indicator (513), and the working indicator (514); the upper cover (4) is provided with a button (421), a slot (423), and a groove pattern (422) corresponding to the positions of the switch (511), the charging socket (512), and the power indicator (513), respectively. The button (421) abuts against the switch (511), the end of the charging socket (512) is located in the slot (423), and the groove pattern (422) is set opposite to the power indicator (513).

3. The electric pneumatic coffee machine according to claim 1, characterized in that: The upper cover (4) is screwed onto the upper opening of the main body (1) and a second sealing ring (6) is provided between the upper cover (4) and the upper opening of the main body (1) for sealing.

4. The electric pneumatic coffee machine according to claim 1, characterized in that: The top cover (4) includes a cover body (41) having a receiving cavity (411) and a face cover (42) that can be sealed to the top of the cover body (41).

5. The electric pneumatic coffee machine according to claim 4, characterized in that: A bracket (55) is provided inside the receiving cavity (411), and a control circuit board (51) is locked to the lower side of the bracket (55). The bracket (55) has multiple studs (551) with screw holes. The first screw (56) passes through the screw hole of the stud (551) and is screwed to the bottom of the receiving cavity (411) for fixation.

6. The electric pneumatic coffee machine according to claim 1, characterized in that: The filter assembly (2) includes a lower box (21), a filter box (22) and a separator (23); the filter box (22) is fixed to the lower opening of the main body (1) through the lower box (21), and the filter box (22) has at least a number of uniform and small first filter holes for filtering coffee at the bottom; a first sealing ring (3) is provided between the lower box (21) and the lower opening of the main body (1), and the first sealing ring (3) is wrapped around the outer periphery of the separator (23).

7. The electric pneumatic coffee machine according to claim 6, characterized in that: The inner wall of the bottom of the water storage chamber (10) is provided with an inner step (11), and the upper edge of the filter box (22) has a skirt (221) extending outward, which overlaps the upper end face of the lower box body (21); the first sealing ring (3) abuts between the inner step (11) and the skirt (221) of the filter box (22).

8. The electric pneumatic coffee machine according to claim 6, characterized in that: The filter cartridge (22) is designed to fit the shape of an Americano coffee capsule (9). A lower needle (24) is provided at the bottom of the capsule filter cartridge (22). A capsule cap (25) is also provided at the top of the capsule filter cartridge (22). The capsule cap (25) is closed with the top of the capsule filter cartridge (22), and an upper needle (26) is provided on the bottom side of the capsule cap (25).

9. The electric pneumatic coffee machine according to claim 1, characterized in that: A heat insulation sleeve (12) is provided around the main body (1), and the heat insulation sleeve (12) has a viewing window (13).

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