Full-automatic coffee machine

Abstract

The invention relates to the field of coffee machines, in particular to a full-automatic coffee machine. The brewing device comprises a pipeline assembly, a grinding assembly and a brewing unit, the brewing unit comprises a residue scraping mechanism, a brewing head, a brewing cup assembly, a supporting plate and a driving assembly, the residue scraping mechanism is arranged at a cup opening, and the driving assembly drives the brewing cup assembly to move. When the brewing cup assembly moves along the axis of the driving assembly, the brewing cup assembly is guided by the guide rail on the bearing plate and changes the position and the direction along with the track change of the guide rail, the brewing head serves as an ejector block, and the driving assembly drives the brewing cup assembly to abut against the brewing head to enable the piston to reset. And the brewing cup assembly and the abutting plate abut against each other to eject the waste residue cake out, multiple functions are achieved through cooperation of different parts, the overall structure is simplified, and the product failure rate is reduced. According to the coffee machine, the stroke of the brewing cup assembly during other brewing actions is reused, the brewing cup assembly does not need to be made to scrape residues downwards by adding the extra stroke length, and the size of the machine body of the coffee machine is optimized.

Description

Technical Field

[0001] The present invention relates to the field of coffee machines, in particular to a fully automatic coffee machine. Background Art

[0002] Existing technologies, such as patent document CN117017065A, disclose using a motor-driven gear mechanism to move a piston, creating a space that varies with the travel of the brewing cup to achieve slag discharge and powder filling. CN115568759A discloses using a motor-driven screw assembly to rotate and move a piston, creating a space that varies with the travel of the brewing cup to achieve slag discharge and powder filling. Patent document CN117137325A discloses using an elastic member to extend and retract to move a piston, creating a space that varies with the travel of the brewing cup to achieve slag discharge and powder filling. Some coffee machines utilize a latch on the bottom of the brewing cup piston and a mechanism on a support plate that mates with the latch. These latches engage with a drive mechanism to reset the piston. These solutions require complex piston reset mechanisms and require a large number of parts, which increases product failure rates. These structures also increase the size of the finished product, contradicting the concept of miniaturization. Summary of the Invention

[0003] The present invention provides a fully automatic coffee machine.

[0004] The above purpose is achieved in this way.

[0005] A fully automatic coffee machine comprises a pipeline assembly, a grinding assembly, and a brewing unit. The brewing unit comprises a scraping mechanism, a brewing head, a brewing cup assembly, a support plate, and a drive assembly. The brewing cup assembly comprises a brewing cup and a piston. The piston reciprocates in the brewing cup. The scraping mechanism is arranged at the cup mouth of the brewing cup assembly. The drive assembly drives the brewing cup assembly to move. A guide rail is provided on the support plate. While the brewing cup assembly moves along the axis of the drive assembly, it is guided by the guide rail and changes its position and direction as the guide rail track changes, so that the brewing cup assembly switches between a piston reset section, a powder loading position, a brewing position, a residue top section, and a residue scraping section. The brewing position is within the piston reset section.

[0006] When the brewing cup assembly moves to the piston reset section under the drive of the driving assembly, the brewing cup assembly engages with the brewing head, the top surface of the piston contacts the brewing head, and the driving assembly drives the brewing cup assembly to continue moving toward the brewing head until the piston is pushed to the bottom of the brewing cup by the brewing head; When the brewing cup assembly moves from the piston reset section to the powder loading position, the brewing cup assembly is driven downward by the driving assembly and, guided by the guide rail, the brewing cup assembly is turned from an inclined state aligned with the brewing head to a vertical state with the cup opening of the brewing cup assembly facing upward. In this state, the grinding assembly grinds the coffee beans into coffee powder and releases it into the brewing cup assembly. After the brewing cup assembly is loaded with coffee powder, the driving assembly drives the brewing cup assembly to move upward to the brewing position. At the same time, under the guidance of the guide rail, the brewing cup assembly changes from a vertical state to an inclined state consistent with the axial direction of the brewing head. The brewing cup assembly moves up to the brewing head position and engages with the brewing head. The hot water generated in the pipe assembly enters the cavity surrounded by the brewing head and the brewing cup to extract coffee. The invention also includes a stop plate, which is arranged on the support plate. When the brewing cup assembly moves from top to bottom in the residue ejecting section, the bottom surface of the piston keeps in contact with the stop plate. At the residue ejecting starting position, the top surface of the piston is at the bottom of the brewing cup. At the residue ejecting ending position, the top surface of the piston rises to the brewing cup opening, at which time the coffee grounds are ejected. After the brewing cup assembly completes the top residue, the driving assembly drives the brewing cup assembly to move upward to the residue scraping section. During the upward movement, the scraping mechanism is triggered to perform the scraping action, and the waste residue cake is scraped off.

[0007] Preferably, the brewing unit also includes a touch device, which is arranged on the supporting plate. The touch device and the scraping device cooperate to trigger the scraping action. The scraping mechanism includes a scraping plate, and the scraping plate includes a scraping plate shaft and a driven part. The scraping plate is arranged at the cup mouth of the brewing cup assembly, and the scraping plate rotates or moves relative to the cup mouth. The touch device includes a touch block and a touch block shaft, and the touch block rotates around the touch block shaft.

[0008] Preferably, when the driving assembly drives the brewing cup assembly to ascend to scrape the residue, the touch block contacts the driven part. As the driving assembly continues to drive the brewing cup assembly to ascend, the touch block presses the driven part, causing the driven part to drive the scraping plate to rotate around the scraping plate rotation axis toward the brewing cup opening. When the driving assembly drives the brewing cup assembly to descend, the driven part contacts the touch block. As the driving assembly continues to drive the brewing cup assembly to descend, the driven part presses the touch block, causing the touch block to rotate around the touch block rotation axis until the touch block is offset from the driven part.

[0009] Preferably, the grinding assembly includes a grinding wheel, a grinding chamber, a powder discharge chamber, a plasma generator and a plasma generating chamber, the plasma generator includes a plasma generator electrode, the powder discharge chamber inlet is connected to the grinding chamber outlet, the powder discharge chamber includes a powder discharge channel, the powder discharge channel extends downward from the powder discharge chamber inlet, the plasma generating chamber is located above the powder discharge channel and is connected to the powder discharge channel, the plasma generator electrode at least partially extends into the plasma generating chamber, and the coffee powder processed in the grinding chamber enters the powder discharge chamber from the grinding chamber outlet and is released.

[0010] Preferably, the pipeline assembly includes a water tank, a flow meter, a water pump, a pressure relief valve and a heating element which are connected in sequence.

[0011] Preferably, the pipeline assembly also includes a first solenoid valve, a second solenoid valve, a waste water box, and a steam outlet. The outlet 1-2 of the first solenoid valve is connected to the heating element, the outlet 1-1 of the first solenoid valve is connected to the brewing head and the outlet 2-3 of the second solenoid valve, the outlet 1-3 of the first solenoid valve is connected to the waste water box, the outlet 2-1 of the second solenoid valve is connected to the steam outlet, and the outlet 2-2 of the second solenoid valve is connected to the waste water box.

[0012] Preferably, when making coffee, the cold water in the water tank is heated to hot water by the heating element, the first solenoid valve is energized, the outlet 1-1 and the outlet 1-2 are connected, the second solenoid valve is not energized, and the outlet 2-1 and the outlet 2-3 are not connected.

[0013] Preferably, when making foamed milk, the cold water in the water tank is heated to steam by the heating element, the first solenoid valve and the second solenoid valve are energized, the outlet 1-1 of the first solenoid valve is connected to the outlet 1-2, and the outlet 2-3 of the second solenoid valve is connected to the outlet 2-2.

[0014] After adopting the above technical solution, the present invention: 1. By using the brewing head as a push block, the driving assembly drives the brewing cup assembly and the brewing head to touch each other to reset the piston, and the brewing cup assembly and the abutment plate are used to touch each other to eject the waste cake. By coordinating different components to achieve multiple functions, unnecessary parts are reduced, the overall structure is simplified, and the product failure rate is reduced.

[0015] 2. The driving assembly drives the brewing cup assembly to move upward so that the relevant scraping devices cooperate with each other to trigger the scraping action. By reusing the stroke of the brewing cup assembly when performing other brewing actions, there is no need to add additional stroke length to make the brewing cup assembly scrape the residue downward, thereby optimizing the body volume of the coffee machine.

[0016] 3. A plasma generating chamber is set above the powder outlet channel to fully generate plasma. The plasma generator electrode extends into the generating chamber. The plasma generator electrode is staggered with the channel through which the coffee powder passes, thereby avoiding contamination and covering of the electrode by the coffee powder. The plasma generated by the plasma generating chamber located above the coffee powder channel can be fully mixed with the coffee powder passing through the coffee powder channel, eliminating static electricity and preventing the coffee powder from adhering to the inner wall of the powder outlet chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of a fully automatic coffee machine.

[0018] Figure 2A three-dimensional diagram of a coffee grinding device.

[0019] Figure 3 for Figure 2 Cross-sectional view of AA in the figure.

[0020] Figure 4 Schematic diagram of the plasma generator electrode and powder outlet channel.

[0021] Figure 5 Schematic diagram of the piston reset.

[0022] Figure 6 This is a diagram of the brewing cup component receiving powder.

[0023] Figure 7 This is a schematic diagram of the waste cake being pushed out by the piston.

[0024] Figure 8 It is a schematic diagram of the waste cake being scraped away by the scraping mechanism.

[0025] Figure 9 Schematic diagram of the scraping mechanism and the touch device when scraping the brewing cup assembly.

[0026] Figure 10 Schematic diagram of the scraping mechanism and the contact device after the brewing cup assembly is scraped.

[0027] Figure 11 This is a schematic diagram of the scraping mechanism and the touch device when the brewing cup assembly descends and passes through the touch device.

[0028] Figure 12 This is another schematic diagram of the scraping mechanism and the touch device when the brewing cup assembly descends and passes through the touch device.

[0029] Figure 13 This is a schematic diagram of the parts connection of a fully automatic coffee machine. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] Combine Figure 1A fully automatic coffee machine includes a pipeline assembly, a grinding assembly 1, a scraping mechanism 25, a brewing head 22, a brewing cup assembly 23, a support plate 21 and a drive assembly. The brewing cup assembly 23 includes a brewing cup and a piston 230. The piston 230 reciprocates in the brewing cup. The scraping mechanism 25 is arranged at the cup mouth of the brewing cup assembly 23. The drive assembly drives the brewing cup assembly 23 to move. The support plate 21 is provided with a guide rail 212 and a grinding assembly 1. While the brewing cup assembly 23 moves along the axis of the drive assembly, it is guided by the guide rail 212 and changes its position and direction as the track of the guide rail 212 changes, so that the brewing cup assembly 23 switches between the piston 230 reset section, the powder loading position, the brewing position, the residue top section, and the scraping section.

[0032] The brewing head 22 is provided with a water inlet pipe 213 , which is in communication with the brewing head 22 . The brewing cup assembly 23 is provided with a water outlet pipe 214 , which is in communication with the inner cavity of the brewing cup.

[0033] Combine Figure 5 When the brewing cup assembly 23 is driven by the driving assembly to move to the piston 230 reset section, the brewing cup assembly 23 engages with the brewing head 22, and the driving assembly drives the brewing cup assembly 23 to continue moving toward the brewing head 22 until the piston 230 is pushed to the bottom of the brewing cup. When the brewing cup assembly 23 enters the piston 230 reset section, the driving assembly drives the brewing cup assembly 23 to rise to the brewing head 22 position so that the brewing cup assembly 23 engages with the brewing head 22, and the driving assembly drives the brewing cup assembly 23 to continue moving toward the brewing head 22, and the piston 230 moves downward relative to the brewing cup assembly 23 until it is pushed to the bottom of the brewing cup by the brewing head 22. The length L of the brewing head 22 is greater than or equal to the depth S of the brewing cup cavity so that the brewing head 22 can completely push the piston 230 to the bottom of the brewing cup cavity.

[0034] Combine Figure 6 When the brewing cup assembly 23 moves from the reset section of the piston 230 to the powder loading position, the brewing cup assembly 23 is driven downward by the driving assembly and, at the same time, guided by the guide rail 212, the brewing cup assembly 23 is turned from an inclined state consistent with the direction of the brewing head to a vertical state with the cup opening of the brewing cup assembly 23 facing upward. In this state, the grinding assembly 1 grinds the coffee beans into coffee powder and releases it into the brewing cup assembly 23.

[0035] After the brewing cup assembly 23 is loaded with coffee powder, the driving assembly drives the brewing cup assembly 23 to move upward toward the brewing position. At the same time, guided by the guide rail 212, the brewing cup assembly 23 is transformed from a vertical state to an inclined state consistent with the axial direction of the brewing head 22. The brewing cup assembly 23 moves upward to the position of the brewing head 22 and engages with the brewing head 22. Hot water enters the cavity surrounded by the brewing head 22 and the brewing cup to extract coffee.

[0036] Combine Figure 7 , and also includes a push plate 211, which is set on the support plate 21. When the brewing cup assembly 23 moves from top to bottom in the residue top section, the bottom surface of the piston 230 keeps in contact with the push plate 211. At the starting position of residue top, the top surface of the piston 230 is at the bottom of the brewing cup. At the ending position of residue top, the top surface of the piston 230 rises to the brewing cup mouth, and the coffee grounds cake is ejected at this time.

[0037] Combine Figure 8 、 Figure 9 、 Figure 11 After the brewing cup assembly 23 completes the top residue, the driving assembly drives the brewing cup assembly 23 to move up to the residue scraping section, and also includes a touch device 24, which is arranged on the support plate 21. The touch device 24 and the scraping device cooperate to trigger the scraping action. The scraping mechanism 25 includes a scraping plate, and the scraping plate includes a scraping plate rotating shaft 252 and a driven part 253. The scraping plate is arranged at the cup mouth of the brewing cup assembly 23, and the scraping plate rotates or moves relative to the cup mouth. The touching device 24 includes a touch block 241 and a touch block rotating shaft 242. The touch block 241 rotates around the touch block rotating shaft 242. When the driving assembly drives the brewing cup assembly to rise to scrape the residue, the touch block 241 contacts the driven part 253. As the driving assembly continues to drive the brewing cup assembly 23 to rise, the touch block 241 presses the driven part 253 so that the driven part 253 drives the scraping plate to rotate around the scraping plate rotating shaft 252 toward the brewing cup mouth.

[0038] When the driving assembly drives the brewing cup assembly 23 to move downward and pass through the touch device 24, the driven part 253 contacts the touch block 241. As the driving assembly continues to drive the brewing cup assembly 23 downward, the driven part 253 presses the touch block 241 to make the touch block 241 rotate around the touch block rotating shaft 242 until the touch block 241 is offset from the driven part 253. When the touch device 24 moves downward, it will not trigger the scraping action of the scraping mechanism 25.

[0039] The grinding assembly 1 includes a grinding wheel 111, a grinding chamber 11, a powder discharge chamber 12, a plasma generator 13 and a plasma generating chamber 131. The plasma generator 13 includes a plasma generator 13 electrode. The inlet of the powder discharge chamber 12 is connected to the outlet of the grinding chamber 11. The powder discharge chamber 12 includes a powder discharge channel 121. The powder discharge channel 121 extends downward from the inlet of the powder discharge chamber 12. The plasma generating chamber 131 is located above the powder discharge channel 121 and is connected to the powder discharge channel 121. The plasma generator 13 electrode at least partially extends into the plasma generating chamber 131. The coffee powder processed in the grinding chamber 11 enters the powder discharge chamber 12 from the outlet of the grinding chamber 11 and is released. The vertical distance L1 between the plasma generator electrode 13 and the powder discharge channel 121 is greater than or equal to 0.5 mm, and the narrowest width S1 of the plasma generating chamber 31 is greater than or equal to 0.5 mm. When the plasma generator is working, the air in the powder discharge chamber 12 is ionized through the plasma generator electrode 13 .

[0040] The pipeline assembly includes a water tank 31, a flow meter 32, a water pump 33, a pressure relief valve 34 and a heating element 35 connected in sequence. The pipeline assembly also includes a first solenoid valve 36, a second solenoid valve 37, a waste water box 39 and a steam outlet 38, wherein the outlet 1-2 of the first solenoid valve 36 is connected to the heating element 35, the outlet 1-1 of the first solenoid valve 36 is connected to the brewing head and the outlet 2-3 of the second solenoid valve 37, the outlet 1-3 of the first solenoid valve 36 is connected to the waste water box 39, the outlet 2-1 of the second solenoid valve 37 is connected to the steam outlet 38, and the outlet 2-2 of the second solenoid valve 37 is connected to the waste water box 39.

[0041] When brewing coffee, the heating element 35 begins heating under the control of the control circuit board. After the heating element 35 reaches the set temperature, the water pump 33 starts pumping water. Cold water passes through the filter, the flow meter 32, and the pressure relief valve 34, and is heated to hot water by the heating element 35. The first solenoid valve 26 is energized, connecting outlets 1-1 and 1-2. Hot water flows from outlet 1-2 of the first solenoid valve 36 to outlet 1-1. At this time, the second solenoid valve 37 is deenergized, disconnecting outlets 2-1 and 2-3. Hot water flows from outlet 1-1 through the brewing head 22 into the brewing chamber to brew coffee. The brewed coffee flows out of the water outlet pipe 214. After the coffee is brewed, the first solenoid valve 36 is energized, connecting outlets 1-1 and 1-3, and the remaining water in the brewing chamber is discharged into the waste water box 39.

[0042] When making frothed milk, heating element 35 begins heating under the control of the control circuit board. Once heated to the set temperature, water pump 33 begins pumping water. Cold water passes through heating element 35 and is heated to steam. The first and second solenoid valves 36 and 37 are energized, connecting outlets 1-1 and 1-2 of the first solenoid valve 36 and 2-3 and 2-2 of the second solenoid valve 37. Steam is ejected from steam outlet 38 to froth the milk.

[0043] The specific implementation process is as follows: when making coffee, under the control of the control circuit board, the heating element 35 starts to heat, and at the same time, the brewing cup assembly 23 is driven by the driving mechanism to move up from the initial position until the piston 230 resets the section, pushing the piston 230 to the bottom of the brewing cup. Thereafter, the driving mechanism drives the brewing cup assembly 23 to move downward to the powder receiving position. At the same time, under the action of the guide rail 212, the direction of the brewing cup is changed from the inclined position in the piston 230 reset section to the vertical position. After the heating element 35 is heated to the set temperature, the grinding assembly 1 starts to grind the beans, and the ground coffee powder falls into the coffee cup through the powder outlet channel 121. After the set amount of coffee powder is loaded, the control circuit board controls the driving mechanism to drive the brewing cup assembly 23 to move and rotate toward the brewing position, engage with the brewing head 22, and compact the coffee powder. Then, the water pump 33 is started, and the cold water is heated to hot water through the heating element 35. The hot water passes through the brewing head 22 and enters the brewing chamber formed by the brewing head 22 and the brewing cup to brew coffee, and the coffee flows out through the coffee outlet. After coffee brewing is complete, the brewing cup assembly 23, driven by the drive system, moves downward to the top-of-slag section. The piston 230 is held against the stop plate 211, and the brewing cup assembly 23 continues to move downward until the waste cake is pushed out of the brewing cup opening. At this point, the drive system drives the brewing cup assembly 23 upward to the scraping section. In the scraping section, the scraper follower on the brewing cup assembly 23 contacts the contact block 241, forcing the scraper to rotate, scraping the waste cake from the brewing cup opening into the waste bin. The brewing cup assembly 23 then moves to its initial position. This completes the coffee making process. If milk frothing is desired, the heater 35 begins heating under the control of the control circuit board. After reaching the set temperature, the water pump 33 begins pumping water. The cold water passes through the heater 35 and is heated to steam. The first and second solenoid valves 36 and 37 are energized, connecting the outlet 1-1 of the first solenoid valve 36 to the outlet 1-2, and the outlet 2-3 of the second solenoid valve 37 to the outlet 2-2. The steam passes through outlet 1-2, outlet 1-1, outlet 2-3, outlet 2-2 in sequence, and finally is ejected from steam outlet 38 to foam the milk.

Claims

1. A fully automatic coffee machine, comprising a piping assembly, a grinding assembly, and a brewing unit, the brewing unit comprising a scraping mechanism, a brewing head, a brewing cup assembly, a support plate, and a drive assembly, the brewing cup assembly comprising a brewing cup and a piston, the piston reciprocating in the brewing cup, the scraping mechanism being disposed at the cup opening of the brewing cup assembly, the drive assembly driving the brewing cup assembly to move, a guide rail being provided on the support plate, the brewing cup assembly being guided by the guide rail while moving along the axis of the drive assembly and changing position and direction as the guide rail track changes, so that the brewing cup assembly switches between a piston reset section, a powder loading position, a brewing position, a residue ejecting section, and a residue scraping section, characterized in that: The brewing position is within the piston reset section; When the brewing cup assembly moves to the piston reset section under the drive of the driving assembly, the brewing cup assembly engages with the brewing head, the top surface of the piston contacts the brewing head, and the driving assembly drives the brewing cup assembly to continue moving toward the brewing head until the piston is pushed to the bottom of the brewing cup by the brewing head; When the brewing cup assembly moves from the piston reset section to the powder loading position, the brewing cup assembly is driven downward by the driving assembly and, guided by the guide rail, the brewing cup assembly is turned from an inclined state aligned with the brewing head to a vertical state with the cup opening of the brewing cup assembly facing upward. In this state, the grinding assembly grinds the coffee beans into coffee powder and releases it into the brewing cup assembly. After the brewing cup assembly is loaded with coffee powder, the driving assembly drives the brewing cup assembly to move upward to the brewing position. At the same time, under the guidance of the guide rail, the brewing cup assembly changes from a vertical state to an inclined state consistent with the axial direction of the brewing head. The brewing cup assembly moves up to the brewing head position and engages with the brewing head. The hot water generated in the pipe assembly enters the cavity surrounded by the brewing head and the brewing cup to extract coffee. The brewing unit further includes a stop plate, which is arranged on the support plate. When the brewing cup assembly moves downward from top to bottom in the residue ejection section, the bottom surface of the piston maintains contact with the stop plate. At the residue ejection starting position, the top surface of the piston is at the bottom of the brewing cup. At the residue ejection ending position, the top surface of the piston rises to the brewing cup opening, at which time the coffee grounds are ejected. After the brewing cup assembly completes the top residue, the driving assembly drives the brewing cup assembly to move upward to the residue scraping section. During the upward movement, the scraping mechanism is triggered to perform the scraping action, and the waste residue cake is scraped off.

2. The fully automatic coffee machine according to claim 1, characterized in that: The brewing unit also includes a touch device, which is arranged on the support plate. The touch device and the scraping device cooperate to trigger the scraping action. The scraping mechanism includes a scraping plate, and the scraping plate includes a scraping plate rotating shaft and a driven part. The scraping plate is arranged at the cup mouth of the brewing cup assembly, and the scraping plate rotates or moves relative to the cup mouth. The touch device includes a touch block and a touch block rotating shaft. The touch block rotates around the touch block rotating shaft.

3. The fully automatic coffee machine according to claim 2, characterized in that: When the driving assembly drives the brewing cup assembly to rise to scrape the residue, the touch block contacts the driven part. As the driving assembly continues to drive the brewing cup assembly to rise, the touch block presses the driven part so that the driven part drives the scraping plate to rotate around the scraping plate rotation axis toward the brewing cup opening. When the driving assembly drives the brewing cup assembly to move downward, the driven part contacts the touch block. As the driving assembly continues to drive the brewing cup assembly downward, the driven part presses the touch block to rotate around the touch block rotation axis until the touch block is offset from the driven part.

4. The fully automatic coffee machine according to claim 1, characterized in that: The grinding assembly includes a grinding wheel, a grinding chamber, a powder discharge chamber, a plasma generator and a plasma generating chamber. The plasma generator includes a plasma generator electrode. The powder discharge chamber inlet is connected to the grinding chamber outlet. The powder discharge chamber includes a powder discharge channel. The powder discharge channel extends downward from the powder discharge chamber inlet. The plasma generating chamber is located above the powder discharge channel and is connected to the powder discharge channel. The plasma generator electrode at least partially extends into the plasma generating chamber. The ground coffee powder flows out of the grinding chamber and falls into the brewing cup through the powder discharge channel of the powder discharge chamber.

5. The fully automatic coffee machine according to claim 1, characterized in that: The pipeline assembly includes a water tank, a flow meter, a water pump, a pressure relief valve and a heating element which are connected in sequence.

6. The fully automatic coffee machine according to claim 5, characterized in that: The pipeline assembly also includes a first solenoid valve, a second solenoid valve, a waste water box, and a steam outlet. The outlet 1-2 of the first solenoid valve is connected to the heating element, the outlet 1-1 of the first solenoid valve is connected to the brewing head and the outlet 2-3 of the second solenoid valve, the outlet 1-3 of the first solenoid valve is connected to the waste water box, the outlet 2-1 of the second solenoid valve is connected to the steam outlet, and the outlet 2-2 of the second solenoid valve is connected to the waste water box.

7. The fully automatic coffee machine according to claim 6, characterized in that: When making coffee, the cold water in the water tank is heated to hot water by the heating element, the first solenoid valve is energized, outlet 1-1 and outlet 1-2 are connected, the second solenoid valve is not energized, outlet 2-1 and outlet 2-3 are not connected.

8. The fully automatic coffee machine according to claim 6, characterized in that: When making foamed milk, the cold water in the water tank is heated to steam by the heating element, the first solenoid valve and the second solenoid valve are energized, the outlet 1-1 of the first solenoid valve is connected to the outlet 1-2, and the outlet 2-3 of the second solenoid valve is connected to the outlet 2-2.

Images