Coffee pure drinking system, coffee pure drinking machine and control method thereof

Abstract

The embodiment of the application discloses a coffee brewing system, a coffee brewing machine and a control method thereof. The coffee brewing system comprises a water inlet channel, a pressure-bearing instant heating module, a water outlet channel and an extraction water channel. The water inlet channel comprises a water inlet pipe and a water pump arranged on the water inlet pipe to serve as a buffer and noise reduction component. In the water flow direction of the water inlet pipe, the buffer and noise reduction component is located downstream of the water pump. The pressure-bearing instant heating module is connected with the water pump through the water inlet pipe and is used for instant heating of water flowing into the pressure-bearing instant heating module during operation. The water outlet channel and the extraction water channel are both connected with the pressure-bearing instant heating module and are selectively connected with the pressure-bearing instant heating module. The buffer and noise reduction component is arranged downstream of the water pump to reduce the noise generated by the water inlet channel and improve the user experience.

Description

Technical Field

[0001] This application relates to the field of coffee machine technology, and more specifically, to a coffee purification system, a coffee purifier, and a control method thereof. Background Technology

[0002] A coffee purifier is a device that integrates water purification, heating, and coffee extraction functions.

[0003] In related technologies, coffee purifiers typically use a water pump as a power source to extract coffee. However, during the extraction process, the water pump may generate significant noise due to the high pumping pressure, which can negatively impact the user experience. Summary of the Invention

[0004] This application provides a coffee purification system designed to reduce noise generated by the water inlet circuit and improve the user experience.

[0005] The first aspect of this application provides a coffee purification system for use in a coffee purifier. The coffee purification system includes an inlet water path, a pressurized instant heating module, an outlet water path, and an extraction water path. The inlet water path includes an inlet pipe, a water pump, and a buffer noise reduction device, all mounted on the inlet pipe. Along the water flow direction of the inlet pipe, the buffer noise reduction device is located downstream of the water pump. The pressurized instant heating module is connected to the water pump through the inlet pipe and is used to instantly heat the water flowing into the pressurized instant heating module during operation. The outlet water path and the extraction water path are both connected to the pressurized instant heating module, and one of them is selectively connected to the pressurized instant heating module. The water pressure that the pressurized instant heating module can withstand is not less than the water pressure when the extraction water path extracts coffee.

[0006] In some embodiments, the buffer noise reduction device includes a buffer noise reduction shell and an elastic diaphragm. The buffer noise reduction shell is connected to the water inlet pipe and has a buffer cavity communicating with the water inlet pipe. The elastic diaphragm is disposed in the buffer cavity to buffer the water flow passing through the buffer noise reduction device.

[0007] In some embodiments, the buffer noise reduction element has a buffer flow channel communicating with the water inlet pipe, and the buffer flow channel is arranged in a spiral shape.

[0008] In some embodiments, the buffer noise reduction component includes a first pipe section, a buffer pipe section, and a second pipe section connected in sequence. The first pipe section is also connected to the outlet of the water pump through an inlet pipe, and the second pipe section is also connected to the pressurized instant heating module through the inlet pipe. The diameter of the buffer pipe section is larger than the diameter of the first pipe section and the second pipe section.

[0009] In some embodiments, the outer surface of the water pump and / or the buffer noise reduction component is provided with an elastic layer.

[0010] In some embodiments, the pressurized instant heating module includes a thick film heating tube, which can withstand a water pressure of not less than 0.9 MPa.

[0011] In some embodiments, the water inlet pipe includes a first water inlet pipe and a second water inlet pipe, both connected to the pressurized instant heating module; the water pump includes a supply water pump respectively disposed on the first water inlet pipe and an extraction water pump respectively disposed on the second water inlet pipe, the pumping water pressure of the extraction water pump being greater than the pumping water pressure of the supply water pump, and the buffer noise reduction component being located downstream of the extraction water pump along the water flow direction of the second water inlet pipe; the supply water pump outputs water through the pressurized instant heating module and the outlet water path, and the extraction water pump prepares coffee through the pressurized instant heating module and the extraction water path.

[0012] In some embodiments, the first water inlet pipe further includes a check valve, which is disposed on the first water inlet pipe and located between the water supply pump and the pressurized instant heating module.

[0013] In some embodiments, the check valve includes one of a mechanical check valve and a solenoid valve. In some embodiments, the coffee purification system further includes a flow meter disposed on the second inlet pipe; or, the flow meter is disposed on a common section of the first inlet pipe and the second inlet pipe.

[0014] In some embodiments, the water outlet path includes a water outlet pipe connected to the pressurized instant heating module, and a water outlet valve disposed on the water outlet pipe; the extraction water path includes an extraction pipe connected to the pressurized instant heating module, and a coffee valve and an extraction device disposed sequentially on the extraction pipe along the water flow direction; wherein, the water outlet valve and the coffee valve are selectively connected, the water supply pump outputs water through the pressurized instant heating module in cooperation with the connected water outlet valve, and the extraction water pump prepares coffee through the pressurized instant heating module in cooperation with the connected coffee valve and the extraction device.

[0015] In some embodiments, the water outlet valve and the coffee valve can be replaced by a three-way valve, the two outlets of which are respectively connected to the water outlet pipe and the extraction pipe.

[0016] In some embodiments, the pressurized instant heating module includes an inlet water temperature sensor and an outlet water temperature sensor, wherein the inlet water temperature sensor is disposed at the inlet end of the pressurized instant heating module and the outlet water temperature sensor is disposed at the outlet end of the pressurized instant heating module.

[0017] In some embodiments, the coffee purification system further includes a pure water production line and a pure water tank, wherein the inlet of the pure water tank is connected to the pure water production line, and the outlet of the pure water tank is connected to the inlet of the inlet pipe.

[0018] In some embodiments, the pure water tank includes a low water level detection device and a high water level detection device. The low water level detection device is disposed on the pure water tank and is used to detect the lowest water level in the pure water tank. The high water level detection device is disposed on the pure water tank and is used to detect the highest water level in the pure water tank.

[0019] A second aspect of this application provides a coffee purifier, which includes a housing and a coffee purification system as described in the preceding claims. The housing has a mounting cavity, and the coffee purification system is installed in the mounting cavity.

[0020] A third aspect of this application provides a control method for a coffee purifier, applicable to the coffee purifier described above. The control method includes, upon receiving a drinking water instruction, controlling both the inlet water path and the outlet water path to be connected to the pressurized instant heating module; and upon receiving an extraction instruction, controlling both the inlet water path and the extraction water path to be connected to the pressurized instant heating module.

[0021] This embodiment connects the outlet water path and the extraction water path to the pressurized instant heating module, and selectively connects them to the pressurized instant heating module to achieve functions such as supplying hot water, hot extraction, and room temperature extraction in a single coffee purifier, thus solving the problem of limited functionality in coffee purifiers. Furthermore, compared to existing water storage heating devices, the pressurized instant heating module in this embodiment has pressure-bearing capacity, and the water pressure it can withstand is no less than the water pressure during coffee extraction in the extraction water path, thereby improving the pressure-bearing capacity of the coffee purifier. This embodiment also incorporates a buffer noise reduction component on the inlet pipe to buffer the water flow passing through it, reducing noise generated by the inlet water path and improving the user experience. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is one of the water circuit diagrams of a coffee purification system provided in one embodiment of this application; Figure 2This is a second schematic diagram of the water circuit of a coffee purification system provided in one embodiment of this application; Figure 3 This is a flowchart illustrating a drinking water instruction in one embodiment of this application; Figure 4 This is a flowchart illustrating the extraction instructions in one embodiment of this application; Figure 5 This is a flowchart illustrating a drinking water instruction at room temperature in one embodiment of this application. Figure 6 This is a flowchart illustrating a drinking water instruction as a hot water instruction in one embodiment of this application; Figure 7 This is a flowchart illustrating a drinking water instruction as a boiling water instruction in one embodiment of this application. Figure 8 This is one of the flowcharts of a coffee purifier according to one embodiment of this application; Figure 9 This is a flowchart illustrating an embodiment of the present application where the extraction command is a room temperature extraction command. Figure 10 This is a flowchart illustrating a hot extraction command in one embodiment of this application. Figure 11 This is a second schematic diagram of the process of a coffee purifier in one embodiment of this application; Figure 12 This is a flowchart illustrating a cleaning instruction in one embodiment of this application; Figure 13 This is a flowchart illustrating the descaling instructions in one embodiment of this application.

[0024] Reference numerals: 1. Inlet water path; 11. Inlet pipe; 111. First inlet pipe; 112. Second inlet pipe; 12. Water pump; 121. Supply water pump; 122. Extraction water pump; 14. Check valve; 15. Flow meter; 16. Buffer and noise reduction component; 2. Extraction water path; 21. Extraction pipe; 221. Coffee valve; 23. Extraction device; 24. Extraction nozzle; 3. Pure water tank; 31. Low water level detection device; 32. High water level detection device; 4. Water receiving tray; 5. Pressurized instant heating module; 6. Outlet water path; 61. Outlet pipe; 62. Outlet valve; 63. Outlet nozzle. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] This application provides a coffee purifier, which is a comprehensive smart home appliance that combines water purification, hot water supply, and coffee extraction functions. It aims to meet users' needs for healthy water quality, convenient hot water, and diverse beverage preparation through an integrated design.

[0027] The coffee purifier includes a housing and a coffee purification system. The housing, as the external structure of the coffee purifier, is used to install and protect the internal coffee purification system. Exemplarily, a mounting cavity is formed inside the housing, providing installation space for the coffee purification system and other internal components. The housing can be manufactured using injection molding, selecting engineering plastics such as ABS and PC, resulting in a lightweight and low-cost structure. Alternatively, the housing can be made of metal (such as stainless steel or aluminum alloy), manufactured through processes such as stamping and welding. A metal housing provides a more robust structure, thereby improving the product's durability and stability.

[0028] The coffee purification system is the core of a coffee purifier, responsible for purifying water, heating it, and extracting coffee.

[0029] The coffee purification system will be described in detail below.

[0030] Please see Figure 1 The coffee purification system includes an inlet water path 1, a pressurized instant heating module 5, an outlet water path 6, and an extraction water path 2.

[0031] Specifically, the water inlet circuit 1 includes an inlet pipe 11, a water pump 12 mounted on the inlet pipe 11, and a buffer noise reduction component 16. The inlet pipe 11 is a channel for guiding water flow in, used to deliver water source or filtered and purified water to subsequent components. In this embodiment, the inlet pipe 11 can be a silicone tube to adapt to different installation environments and facilitate pipe bending and layout; the inlet pipe 11 can also be PPR (polypropylene random), which has various connection methods (such as heat fusion connection) and good sealing performance to prevent leakage. Furthermore, since the inlet pipe 11 connected to the outlet end of the water pump 12 needs to be pressurized, the inlet pipe 11 after the outlet end of the water pump 12 can be made of high-pressure-resistant Teflon tube, PE tube, etc., while the inlet pipe 11 before the inlet end of the water pump 12 has lower pressure or does not need to be pressurized. In this case, the inlet pipe 11 before the inlet end of the water pump 12 can be made of silicone tube or low-strength plastic tube.

[0032] The water pump 12 serves as the power source for the water inlet channel 1, and is used to drive the water flow in the water channel.

[0033] In related technologies, during the extraction process of a coffee purifier, the water pump 12 may generate significant noise due to its high pumping pressure, thus affecting the user experience. Therefore, this application also includes a buffer noise reduction component 16, which is located downstream of the water pump 12 along the water flow direction of the inlet pipe 11. The buffer noise reduction component 16 is used to buffer the water flow passing through it, thereby reducing the noise generated by the water inlet channel 1.

[0034] The pressurized instant heating module 5 is connected to the water pump 12 through the water inlet pipe 11; that is, when the water pump 12 is working, it can pump the water in the water inlet pipe 11 to the pressurized instant heating module 5. When the pressurized instant heating module 5 is working, it is used to heat the water flowing into the pressurized instant heating module 5 in real time, so that the water in the pressurized instant heating module 5 is heated to the preset temperature. The pressurized instant heating module 5 can adjust the water temperature to different levels to meet the needs of different scenarios, thereby improving the user experience.

[0035] Both the water outlet path 6 and the extraction water path 2 are connected to the pressurized instant heating module 5, and one of them can be connected to the pressurized instant heating module 5. It can be understood that in the coffee purifier system of this embodiment, the water inlet of the pressurized instant heating module 5 is connected to the water pump 12 via the water inlet pipe 11, and the water pump 12 pumps water into the pressurized instant heating module 5; the water outlet of the pressurized instant heating module 5 is connected to either the water outlet path 6 or the extraction water path 2 through system control, so that the coffee purifier of this application has multiple functions.

[0036] That is, when the user needs room temperature water, the system controls the pressurized instant heating module 5 to shut down, and the pressurized instant heating module 5 is connected to the water outlet 6 so that the water outlet 6 outputs room temperature water; when the user needs hot water, the system controls the pressurized instant heating module 5 to operate at the first power, and the pressurized instant heating module 5 is connected to the water outlet 6 so that the water outlet 6 outputs hot water; when the user needs boiling water, the system controls the pressurized instant heating module 5 to operate at the second power, and the pressurized instant heating module 5 is connected to the water outlet 6 so that the water outlet 6 outputs boiling water.

[0037] When a user needs hot coffee, the system controls the pressurized instant heating module 5 to operate at the third power level, and the pressurized instant heating module 5 is connected to the extraction water circuit 2. Hot water flows out along the extraction water circuit 2 to achieve hot coffee extraction. In the case of room temperature extraction, the system controls the pressurized instant heating module 5 to be turned off. The water flows through the pressurized instant heating module 5 without being heated and directly enters the extraction water circuit 2 to achieve coffee extraction using room temperature water. In other words, by switching between the water outlet circuit 6 and the extraction water circuit 2 and through system control, a single coffee purifier can supply room temperature water, hot water, boiling water, hot extraction, and room temperature extraction functions, thus enhancing the versatility of the coffee purifier.

[0038] Furthermore, the pressure-bearing instant heating module 5 in this embodiment of the application adopts instant heating technology, which can heat the water to a preset temperature during the rapid flow of water, avoiding the repeated heating problems of water storage heating devices in related technologies, which lead to water quality degradation and low pressure bearing capacity.

[0039] Therefore, the pressurized instant heating module 5 further possesses pressure-bearing capacity, and the water pressure it can withstand is no less than the water pressure during coffee extraction via the extraction water circuit 2. Understandably, the water pressure is typically high during coffee extraction, and the pressurized instant heating module 5 can still operate stably in high-temperature environments, ensuring that the heating function has a heat resistance of no less than 100℃, thus guaranteeing the reliability and safety of the pressurized instant heating module 5 in high-temperature operating environments.

[0040] This embodiment connects the outlet water path 6 and the extraction water path 2 to the pressurized instant heating module 5, and selectively connects them to the pressurized instant heating module 5 to achieve functions such as supplying hot water, hot extraction, and room temperature extraction in a single coffee purifier, thus solving the problem of limited functionality in coffee purifiers. Furthermore, compared to existing water storage heating devices, the pressurized instant heating module 5 in this embodiment has pressure-bearing capacity, and the water pressure it can withstand is not less than the water pressure during coffee extraction in the extraction water path 2, thereby improving the pressure-bearing capacity of the coffee purifier. This embodiment also includes a buffer noise reduction component 16 on the inlet pipe 11 to buffer the water flow passing through it, reducing noise generated by the inlet water path 1 and improving the user experience.

[0041] In some embodiments, the buffer noise reduction device 16 includes a buffer noise reduction shell and an elastic diaphragm. The buffer noise reduction shell is connected to the water inlet pipe 11, and the buffer noise reduction shell 16 has a buffer cavity communicating with the water inlet pipe 11. The elastic diaphragm is disposed in the buffer cavity to buffer the water flow passing through the buffer noise reduction device 16.

[0042] The elastic diaphragm can be a silicone sheet or a rubber sheet. It buffers water flow by absorbing energy through elastic deformation. When the water pressure changes abruptly (such as the water hammer effect caused by the start and stop of pump 12), the elastic diaphragm deforms under the pressure difference, converting kinetic energy into elastic potential energy stored inside the diaphragm. As the diaphragm returns to its original shape, it releases the energy back into the water flow, causing the water pressure to stabilize.

[0043] In other embodiments, the buffer noise reduction element 16 has a buffer flow channel communicating with the water inlet pipe 12, and the buffer flow channel is arranged in a spiral shape.

[0044] The spiral-shaped buffer channel reduces noise by extending the water flow path and altering the flow pattern. When water enters the spiral channel, it flows along the spiral, and this spiral flow pattern increases fluid damping, thereby reducing turbulence. Simultaneously, the centrifugal force of the spiral channel concentrates air bubbles at the center of the channel, preventing them from bursting near the channel walls and generating noise.

[0045] In some other embodiments, the buffer noise reduction component 16 includes a first pipe section, a buffer pipe section, and a second pipe section connected sequentially along the water flow direction, wherein the diameter of the buffer pipe section is larger than the diameter of the first pipe section and the second pipe section.

[0046] This embodiment designs a buffer pipe section with varying pipe diameter based on Bernoulli's principle. The sudden change in pipe diameter within the buffer section balances and regulates flow velocity and pressure. When water flows from the first pipe section into the larger-diameter buffer section, the flow velocity decreases, mitigating pressure fluctuations. Subsequently, as the water flows into the smaller-diameter second pipe section, the flow velocity recovers and the pressure stabilizes, thus achieving buffering and noise reduction of the water flow.

[0047] In some embodiments, an elastic layer is provided on the outer surface of one of the water pump 12 and the buffer noise reduction component 16. That is, an elastic layer is provided on the outer surface of the water pump 12, or an elastic layer is provided on the outer surface of the buffer noise reduction component 16, or both the outer surfaces of the water pump 12 and the buffer noise reduction component 16 are provided with elastic layers. This application does not specifically limit this.

[0048] The elastic layer can be a damping sheet, which reduces noise propagation through damping and vibration reduction. When the water pump 12 or the buffer noise reduction component 16 vibrates, the damping sheet (such as a rubber damping sheet) can convert the energy of the vibration into heat energy for dissipation. The elastic layer can also include a porous structure, which reduces noise propagation by absorbing sound waves. The porous structure of the elastic layer causes sound waves to be reflected and scattered multiple times within the elastic layer, thereby absorbing the energy of the sound waves.

[0049] In some embodiments, the pressurized instant heating module 5 includes a thick-film heating tube, which is the heating element of the pressurized instant heating module 5. The thick-film heating tube can withstand a water pressure of not less than 0.9 MPa, thus enabling it to withstand the pressure generated during the operation of the coffee purification system. Even under the water hammer pressure impact at the moment the water pump 12 starts, the pressurized instant heating module 5 can still operate stably. The optimal extraction pressure for espresso is 0.9 MPa to 1.2 MPa, so setting the thick-film heating tube to withstand a water pressure of not less than 0.9 MPa protects the pipeline.

[0050] In this embodiment, the thick-film heating element can quickly convert electrical energy into heat energy, enabling instant heating of the water circuit. Furthermore, the thick-film heating element possesses excellent corrosion and oxidation resistance, thereby extending the service life of the pressurized instant heating module 5 and ensuring the long-term stable operation of the coffee purification system.

[0051] Furthermore, the thick film heating tube may include a tube surface temperature sensor, which is used for dry burning protection, monitoring the uniformity of the thermal field, and aging assessment of the heating tube. The tube surface temperature sensor is attached to the surface of the outer layer of the thick film resistor, and when the tube surface temperature sensor is attached to the surface of the outer layer of the thick film resistor, thermally conductive silicone grease needs to be used to fill the surfaces of the tube surface temperature sensor and the outer layer of the thick film resistor.

[0052] The thick film heating element also includes a manual reset thermostat. When the temperature of the thick film heating element is high, the manual reset thermostat is disconnected and can only be reset manually, thus making the use of the thick film heating element safer.

[0053] In some embodiments, the pressurized instant heating module 5 includes an inlet water temperature sensor and an outlet water temperature sensor. The inlet water temperature sensor is located at the inlet end of the pressurized instant heating module 5 to monitor the initial temperature of the water entering the module 5 in real time, collecting data for adjusting the heating power of the module 5. For example, when the inlet water temperature is detected to be below the preset temperature, the system automatically increases the heating power to ensure that the outlet water temperature meets the requirements. The outlet water temperature sensor is located at the outlet end of the pressurized instant heating module 5 to provide real-time feedback on the water temperature at the outlet end of the module 5. By comparing it with the preset temperature value, the water temperature is precisely controlled within the preset range, ensuring the stability of the water temperature.

[0054] In other embodiments, the inlet water temperature sensor can be located on the pipeline between the inlet water pipe 11 and the inlet end of the pressurized instant heating module 5, or on the outlet water temperature sensor outlet water path 6 and extraction water path 2.

[0055] When local temperatures become too high, the temperature sensor on the pipe surface can detect the abnormality in time, thereby cutting off the heating power supply to prevent dangerous situations such as dry burning. This further improves the reliability and safety of the pressurized instant heating module 5 and ensures the stable operation of the coffee purification system.

[0056] Please continue reading. Figure 1 In some embodiments, the water inlet pipe 11 includes a first water inlet pipe 111 and a second water inlet pipe 112, both of which are connected to the pressurized instant heating module 5. The water pump 12 includes a water supply pump 121 mounted on the first water inlet pipe 111 and an extraction water pump 122 mounted on the second water inlet pipe 112. The water supply pump 121 and the extraction water pump 122 have different pumping pressures, with the extraction water pump 122 having a higher pumping pressure than the water supply pump 121, to meet the pressure requirements of different functions.

[0057] Furthermore, during the coffee extraction process of the coffee purifier, the extraction water pump 122 operates and requires high pumping pressure, which causes the water flow to impact the pipe wall of the second water inlet pipe 112 during the pumping process, resulting in significant noise. Therefore, along the water flow direction of the second water inlet pipe 112, the buffer noise reduction component 16 is located downstream of the extraction water pump 122 to buffer the water flow pumped by the extraction water pump 122 to the pressurized instant heating module 5, thereby reducing the impact of the water flow on the pipe wall of the second water inlet pipe 112 and reducing noise generation.

[0058] The water supply pump 121 works in conjunction with the pressurized instant heating module 5 and the outlet water passage 6 to deliver water. It can be understood that the water supply pump 121 is used to pump water through the first inlet pipe 111 to the pressurized instant heating module, and controls the pressurized instant heating module 5 to operate, so that the heated water is output as hot or boiling water through the outlet water passage 6, which can be used for daily drinking water, tea making, etc.; or, it controls the pressurized instant heating module 5 to shut off, so that the water in the pressurized instant heating module 5 is output as room temperature water through the outlet water passage 6, which can be used for daily drinking water. Furthermore, a relatively low water pressure is sufficient to meet the water flow pressure requirements of this type of application scenario.

[0059] The extraction water pump 122 works in conjunction with the pressurized instant heating module 5 and the extraction water circuit 2 to prepare coffee. It can be understood that the extraction water pump 122 pressurizes water through the second inlet pipe 112 and then delivers it to the pressurized instant heating module 5, from where it is used to prepare coffee via the extraction water circuit 2. Since coffee extraction requires high pressure to fully extract the effective components from the coffee powder, the higher pumping water pressure of the extraction water pump 122 ensures the efficient operation of the coffee extraction process.

[0060] It should be noted that the embodiments of this application do not specifically limit the types of the water supply pump 121 and the extraction pump 122. For example, the extraction pump 122 can be an electromagnetic pump, a plunger pump, a positive displacement pump (AC or DC), etc., and the water supply pump 121 can be a diaphragm pump, which achieves fluid transport through the reciprocating motion of an elastic diaphragm and has a backflow prevention function. That is, the diaphragm of the water supply pump 121 and the valve plate form a sealing structure with a backflow pressure of not less than 2.0 MPa, preventing the high-pressure water in the pressurized instant heating module 5 from flowing back and impacting the water supply pump 121, thus preventing damage to the pump body. Simultaneously, the diaphragm pump's outlet flow rate is greater than or equal to 100 ml / min, thereby meeting daily water supply needs.

[0061] Please continue reading. Figure 1In some embodiments, the water outlet path 6 includes a water outlet pipe 61 connected to the pressurized instant heating module 5, and a water outlet valve 62 disposed on the water outlet pipe 61; the extraction water path 2 includes an extraction pipe 21 connected to the pressurized instant heating module 5, and a coffee valve 221 and an extraction device 23 disposed sequentially on the extraction pipe 21 along the water flow direction; wherein, the water outlet valve 62 and the coffee valve 221 are selectively connected; that is, by selectively connecting the coffee valve 221 and the water outlet valve 62, the switching of different functions can be realized, and the water supply pump 121 cooperates with the pressurized instant heating module 5 and the connected water outlet valve 62 to output water, and the extraction water pump 122 cooperates with the pressurized instant heating module 5 and the connected coffee valve 221 and the extraction device 23 to prepare coffee. For example, when a user needs hot water, the system controls the outlet valve 62 to be connected to the pressurized instant heating module 5. The water supply pump 121 delivers water to the pressurized instant heating module 5 for heating, and then the water flows out through the outlet valve 62 and the outlet nozzle 63 of the outlet pipe 61. When making coffee, the system controls the coffee valve 221 to be connected, the extraction water pump 122 pressurizes the water and pumps it to the pressurized instant heating module 5. The water then enters the extraction device 23 through the coffee valve 221 to complete the coffee making process, and then flows out from the extraction nozzle 24 of the extraction pipe 21.

[0062] The switching and coordination mechanism of the water outlet valve 62 and coffee valve 221 makes the hot water supply and coffee extraction functions independent and do not affect each other. At the same time, it can quickly switch the working mode according to the user's needs, improve the convenience of operation, and further optimize the multi-functionality of the coffee purifier.

[0063] Furthermore, in some embodiments, the water outlet valve 62 and the coffee valve 221 can be replaced with a three-way valve. The inlet of the three-way valve is connected to the pressurized instant heating module 5, and the two outlets of the three-way valve are connected to the water outlet pipe 61 and the extraction pipe 21, respectively. In this way, when the coffee purifier needs to prepare coffee, the outlet of the three-way valve connected to the extraction pipe 21 is connected; when the coffee purifier supplies hot water, the outlet of the three-way valve connected to the water outlet pipe 61 is connected. This achieves separate control of water flow and uses a single three-way valve to improve the speed of control effect and reduce the number of valves, thereby reducing manufacturing costs.

[0064] In some embodiments, the coffee valve 221 can be an electric three-way valve. Specifically, the coffee valve 221 has three interfaces: an inlet, an outlet, and a pressure relief port. The inlet is connected to the inlet pipe 11 and is used to receive water that has been pressurized by the water pump 12 and heated by the pressurized instant heating module 5. The outlet is connected to the extraction device 23 and delivers hot water to the extraction device 23.

[0065] The coffee valve 221 has two operating states: When it is open, the internal valve core connects the inlet and outlet, allowing water to flow from the inlet to the outlet, providing hot water to the extraction device 23. The pressure relief port is closed, not connected to other interfaces, ensuring normal water supply. When the coffee valve 221 is closed, the valve core position changes, connecting the pressure relief port to the outlet. The inlet is then isolated from other interfaces, allowing residual high-pressure water in the extraction device 23 to be discharged through the outlet and pressure relief port, thus relieving pressure on the extraction device 23. This avoids operational difficulties caused by excessive internal pressure in the extraction device 23 when the extraction nozzle 24 is clogged or requires disassembly and maintenance.

[0066] Please refer to Figure 1 Water discharged from the pressure relief port can be drained to the receiving device 4. The connection between the pressure relief port of the coffee valve 221 and the water receiving device 4 can be achieved in several ways. For example, a flexible hose can be used, which offers good flexibility, facilitates layout within the coffee machine, and effectively buffers water flow impact. A rigid pipe can also be used, offering better stability and durability. Alternatively, the coffee valve 221 can be fitted with the plastic and rubber combination structure on the product body. This connection method eliminates the need for additional fittings, simplifying the structure, while the rubber part provides good sealing to prevent water leakage during pressure relief. Of course, water discharged from the pressure relief port can also be drained to the extraction device 23 to clean the removable parts within the extraction device 23.

[0067] Please see Figure 2 In some embodiments, the water inlet circuit 1 further includes a check valve 14, which is disposed on the first water inlet pipe 111 and located between the water supply pump 121 and the pressurized instant heating module 5. It is understood that the check valve 14 is used to prevent water from flowing back from the pressurized instant heating module 5 into the water supply pump 121. For example, the check valve 14 has a reverse pressure resistance capacity of not less than 2.0 MPa to adapt to the high-pressure working environment during the coffee extraction process. When the extraction pump 122 is working, the extraction water circuit 2 will generate high pressure, posing a risk of high-pressure water flowing back into the water supply pump 121 and related pipelines. In this embodiment, the check valve 14 can quickly block the water flow through its internal sealing structure when reverse pressure occurs, preventing the pipe at the outlet of the water supply pump 121 from detaching due to excessive pressure, and preventing hot water leakage that could cause equipment damage or safety hazards. At the same time, the check valve 14 can also isolate the water supply pump 121 from the high-pressure environment, prevent the water supply pump 121 from being damaged by reverse high pressure impact, effectively extend the service life of the water supply pump 121, and ensure the stable operation of the hot water supply function.

[0068] It should be noted that the check valve 14 may include a mechanical check valve or a solenoid valve. For example, when the check valve 14 is a mechanical check valve, the mechanical check valve relies on the fluid pressure itself to control the opening and closing of the valve. It has a simple structure, high reliability, requires no additional power supply, and has a low cost.

[0069] For example, when the check valve 14 is a solenoid valve, the solenoid valve controls the opening and closing of the valve through electromagnetic force, which has the advantages of fast response and precise control. Furthermore, this solenoid valve also has pressure resistance to prevent the water supply pump 121 outlet pipe from detaching due to excessive pressure. In a coffee purification system, the type of check valve 14 can be selected according to actual needs and cost considerations to meet different functional requirements.

[0070] Please see Figures 1-2 In some embodiments, the coffee purification system further includes a flow meter 15, meaning the water inlet path 1 also includes a flow meter 15. The flow meter 15 in this embodiment has two configuration options. In one configuration, the flow meter 15 is installed on the second water inlet pipe 112. In this case, the flow meter 15 is used to independently monitor the water usage during the coffee extraction process. During coffee extraction, the water usage is crucial to the taste and quality of the coffee. By monitoring and controlling the water usage in real time through the flow meter 15, optimal results can be achieved with each extraction.

[0071] In another configuration, the flow meter 15 is installed on the common section of the first inlet pipe 111 and the second inlet pipe 112 to monitor the water consumption for coffee extraction or the water output for hot water. The system can obtain data on the water consumption for coffee extraction, the water output for hot water, and the total water consumption through the flow meter 15, facilitating precise control and management of water usage for different functions.

[0072] Please continue reading. Figures 1-2 In some embodiments, the coffee purification system also includes a pure water production line and a pure water tank 3. The outlet of the pure water production line is connected to the inlet of the pure water tank 3 to provide pure water to the pure water tank 3.

[0073] For example, the pure water production circuit includes a filtration assembly with multi-stage filtration capabilities. For instance, the first-stage filtration assembly may use a composite filter element, which could include PP cotton, activated carbon, or PAC (polypropylene cotton + carbon fiber + non-woven fabric composite pre-filter). The second-stage filtration assembly may use an RO (reverse osmosis) filter element, and the third-stage filtration assembly may use an activated carbon or mineral filter element. As a pre-filtration stage, the first-stage filtration assembly helps to aggregate suspended particles, colloids, and other impurities in tap water into larger flocs, facilitating their removal by subsequent filtration. The first-stage filtration assembly effectively intercepts large particles such as sediment and rust in the water, reducing the burden on subsequent RO filtration and extending the lifespan of the RO membrane.

[0074] The second-stage filtration component, RO filtration, is the core of the entire filtration process. The RO reverse osmosis membrane has extremely small pores, allowing only water molecules to pass through under pressure while trapping most impurities such as bacteria, viruses, and heavy metal ions, resulting in highly pure water. Through the synergistic effect of these two filtration stages, the water flowing from the outlet of the purified water system to the purified water tank 3 achieves a very high purity, meeting users' requirements for healthy, high-quality drinking water and the water quality requirements for coffee extraction, further enhancing the coffee's flavor. It also reduces the risk of scale buildup in the downstream water supply lines (after the purified water tank 3), extending the lifespan of the coffee purifier.

[0075] The activated carbon filter in the third-stage filtration unit is used to further absorb odors and improve the taste of the water; at the same time, the mineral filter can improve the balance and body of coffee extraction.

[0076] Of course, in other embodiments, the filtering component may include only the first-stage filtering component and the second-stage filtering component.

[0077] The pure water tank 3 is the pure water storage component of the coffee purification system. It is directly connected to the water inlet of the water inlet pipe 11, supplying water to the water inlet pipe 11 to ensure the water source needs of the coffee preparation process. In this embodiment, pure water is used to prepare the coffee, which improves the taste of the coffee.

[0078] In some embodiments, the pure water tank 3 may also include a cold water tank for storing cold water. That is, the cold water tank has a refrigeration component inside. When pure water enters the cold water tank, the refrigeration component turns the pure water into cold water. Thus, the coffee purification system in this embodiment also has the function of providing cold water and preparing cold coffee.

[0079] In other embodiments, the pure water tank 3 is a cold water tank with a refrigeration system. In this case, when preparing cold coffee, the cold water in the tank is directly pumped to the extraction device 23 by the water pump 12 to prepare cold coffee using cold water. When preparing hot coffee, since the cold water tank only provides cold water, the water pump 12 pumps the cold water to the pressurized instant heating module 5. The pressurized instant heating module 5 needs to heat the incoming cold water. At this time, the heating power of the pressurized instant heating module 5 needs to be high to quickly meet the hot water temperature required for preparing hot coffee.

[0080] It should be noted that, in this embodiment, the water required for cold extraction, hot extraction, or room temperature extraction all needs to flow through the pressurized instant heating module 5. However, during cold extraction and room temperature extraction, the pressurized instant heating module 5 is turned off. At this time, the temperature of the cold water flowing into the pressurized instant heating module 5 is 0°C to 15°C, so as to simultaneously meet the extraction temperature required for cold extraction and room temperature extraction. However, during hot extraction, the pressurized instant heating module 6 needs to be powered on to heat the water flowing into the pressurized instant heating module 5.

[0081] Since the coffee purification system has a cold brew function, in some embodiments, because the system integrates cold brew, hot brew, and hot water dispensing functions, residual water will remain in the pipeline after hot brewing or hot water dispensing. If the system continues to execute the cold brew mode, the temperature of the cold water will not meet the required temperature for cold brewing, thus affecting the extraction quality. Therefore, in this embodiment, before the system executes the cold brew mode, the system controls the pre-cooling of the pipeline to lower the temperature of the residual water in the pipeline. Furthermore, during the cold brew mode, the pressurized instant heating module 5 is heated for a period of time before the cold brew extraction, and is not heated for a period of time after the cold brew extraction. The period of time before extraction must be less than or equal to 30 seconds, and the period of time after extraction must be less than 40 minutes and 30 seconds. In this way, the total cold brew time does not exceed 5 minutes, and the pressurized instant heating module 5 is not heated for a period of time after the cold brew extraction to ensure the required cold water temperature for cold brewing.

[0082] Please continue reading. Figures 1-2 In some embodiments, the pure water tank 3 includes a low water level detection element 31 and a high water level detection element 32, wherein the low water level detection element 31 and the high water level detection element 32 can be a water level sensing needle or a mechanical float.

[0083] A low water level detector 31 is installed on the pure water tank 3 to detect the lowest water level in the tank. A high water level detector 32 is installed on the pure water tank 3 to detect the highest water level. That is, the low water level detector 31 and the high water level detector 32 work together on the pure water tank 3 to detect the water level. For example, the low water level detector 31 is installed near the bottom of the pure water tank 3. When the water level drops to this position, it triggers the control system to cut off the power to the water pump 12 to prevent dry burning damage. For instance, during continuous beverage production in the coffee purifier, when the water level in the pure water tank 3 drops to a low level, the low water level detector 31 sends a signal, and the control system automatically stops working and prompts the user to add water or automatically adds water to the pure water tank 3 through the pure water production circuit. The high water level detector 32 is installed near the top of the pure water tank 3. When the water level reaches this position, it controls the shut-off of the pure water production circuit, stopping water production and adding water to the pure water tank 3. It is evident that the aforementioned dual water level detection mechanism not only ensures the safe operation of the coffee purifier but also prevents water waste by detecting water levels, thereby improving the reliability and user experience of the coffee purifier.

[0084] This application also provides a control method for a coffee purifier, the control method including: Step S10: Upon receiving a drinking water instruction, control both the inlet water path 1 and the outlet water path 6 to be connected to the pressurized instant heating module 5.

[0085] Understandably, when the coffee purifier's control system receives a water-drinking command, it can connect both the inlet water path 1 and the outlet water path 6 to the pressurized instant heating module 5. Water from the pressurized instant heating module 5 then flows out through the outlet spout 63 of the outlet water path 6 for the user's use. The water-drinking command can include room temperature water, hot water, and boiling water commands. By controlling the pressurized instant heating module 5 to operate or shut down, the system can ensure that the outlet spout 63 of the outlet water path 6 dispenses room temperature water, hot water, or boiling water, thus meeting different user needs and addressing the issue of limited functionality in coffee purifiers.

[0086] Step S20: Upon receiving the extraction command, control both the inlet water path 1 and the extraction water path 2 to be connected to the pressurized instant heating module 5.

[0087] Understandably, when the coffee purifier's control system receives an extraction command, it can connect both the inlet water path 1 and the extraction water path 2 to the pressurized instant heating module 5. This allows water from the pressurized instant heating module 5 to flow out through the extraction nozzle 24 of the extraction water path 2, enabling the user to extract coffee. The extraction command can include both room temperature and hot extraction commands, and by controlling the pressurized instant heating module 5 to operate or shut down, hot or room temperature extraction can be achieved to meet different user needs.

[0088] Please see Figure 1 In some embodiments, the water inlet path 1 includes a first water inlet pipe 111 connected to the pressurized instant heating module 5, a water supply pump 121 installed on the first water inlet pipe 111, a second water inlet pipe 112 connected to the pressurized instant heating module 5, and an extraction water pump 122 installed on the second water inlet pipe 112; the water outlet path 6 includes a water outlet pipe 61 connected to the pressurized instant heating module 5 and a water outlet valve 62 installed on the water outlet pipe 61; the extraction path 2 includes an extraction pipe 21 connected to the pressurized instant heating module 5, and a coffee valve 221 and an extraction device 23 sequentially installed on the extraction pipe 21 along the water flow direction.

[0089] Please see Figure 3 Step S10 may include: Step S101: Upon receiving a drinking water instruction, power on the water outlet valve 62.

[0090] Upon receiving a drinking water instruction, the system controls the water outlet valve 62 to be energized, thereby connecting the water outlet path 6 with the pressurized instant heating module 5. This indicates that the pressurized instant heating module 5 needs to hold water so that, after the water outlet valve 62 is energized, the water outlet 63 of the water outlet path 6 can flow out water corresponding to the drinking water instruction.

[0091] Step S102: Control the water supply pump 121 to start working after the water outlet valve 62 is powered on for a first preset time.

[0092] It is understandable that the water supply pump 121 is powered on only after the outlet valve 62 has been powered on for a first preset time. This allows the water in the first inlet pipe 111 to be pumped to the pressurized instant heating module 5, ensuring that both the first inlet pipe 111 and the pressurized instant heating module 5 are filled with water. This prevents water shortage in the pressurized instant heating module 5 and avoids dry burning. Furthermore, in this embodiment, the outlet valve 62 is powered on before the water supply pump 121. This solves the problem of back pressure at the outlet of the water supply pump 121 due to the delayed power-on of the outlet valve 62, which could cause the connection between the outlet of the water supply pump 121 and the inlet pipe 11 to detach due to pressure. It also avoids the problem of reduced lifespan of the outlet valve 62 under instantaneous pressure impact at the front end.

[0093] It should be noted that the first preset duration mentioned above can be 0.5 seconds, 1 second, 2 seconds, 3 seconds, ..., 10 seconds, ..., 100 seconds, ..., 200 seconds, etc.

[0094] Please see Figure 4 Step S20 includes: Step S201: Upon receiving the extraction command, power on the coffee valve 221; Upon receiving the extraction command, the coffee valve 221 is energized to connect the extraction water path 2 and the pressurized instant heating module 5, indicating that the pressurized instant heating module 5 needs to contain water so that the extraction nozzle 24 of the extraction water path 2 can flow out coffee extracted at different temperatures after the coffee valve 221 is energized.

[0095] Step S202: Control the extraction water pump 122 to start working after the coffee valve 221 is powered on for a second preset time; or control the extraction water pump 122 to be powered on synchronously with the coffee valve 221; or control the coffee valve 221 to start working after the extraction water pump 122 is powered on for a second preset time.

[0096] Understandably, after the coffee valve 221 is powered on for a second preset time, the extraction water pump 122 is then powered on to ensure that the water in the second water inlet pipe 112 is pumped to the pressurized instant heating module 5. In this way, both the second water inlet pipe 112 and the pressurized instant heating module 5 are filled with water to prevent water shortage in the pressurized instant heating module 5, thereby avoiding situations such as dry burning.

[0097] Furthermore, after coffee extraction is complete, the coffee valve 221 needs to be closed after a second preset time since the extraction pump 122 is shut off. It is understood that when the coffee purifier executes the extraction command, the second water inlet pipe 112 between the extraction pump 122 and the pressurized instant heating module 5 is under high pressure, ranging from 0 MPa to 2.0 MPa. Therefore, by controlling the coffee valve 221 to remain open for the second preset time after the extraction pump 122 is shut off, the coffee valve 221 can continue to open for the second preset time, thereby releasing pressure from the second water inlet pipe 112 between the extraction pump 122 and the pressurized instant heating module 5, reducing the risk of leakage due to pressure failure of the second water inlet pipe 112.

[0098] Alternatively, the extraction water pump 122 and the coffee valve 221 can be powered on synchronously, so that the second water inlet pipe 112 and the extraction water circuit 2 are simultaneously connected to the pressurized instant heating module 5.

[0099] It should be noted that the second preset duration mentioned above can be 0.5 seconds, 1 second, 2 seconds, 3 seconds, ..., 100 seconds, ..., 200 seconds, etc.

[0100] Of course, in other embodiments, in order to achieve the optimal extraction pressure required for espresso, which is 0.9MPa to 1.2MPa, i.e., the preset pressure value ranges from 0.9MPa to 1.2MPa, the coffee valve 221 can be energized after the extraction pump 122 has been energized for a second preset time. Thus, the second preset time can be calculated in two ways: firstly, a pressure sensor is installed on the first inlet pipe 112 connected to the outlet of the extraction pump 122, and the second preset time corresponds to the time when the pressure value reaches the preset pressure value after the extraction pump 122 has been energized; secondly, the second preset time is determined by the actual measured time when the pressure value reaches the preset pressure value after the extraction pump 122 has been energized.

[0101] Furthermore, in some embodiments, the drinking water instruction includes a room temperature water instruction, a hot water instruction, and a boiling water instruction.

[0102] Please see Figure 5 Therefore, after step 102, the following steps are included: Step 103: When the drinking water command is a room temperature water command, control the pressurized instant heating module 5 to shut down.

[0103] Understandably, at this time, the coffee dispenser needs to supply room temperature water, and the temperature range of room temperature water is usually between 5℃ and 35℃. Therefore, the pressurized instant heating module 5 is closed, and based on the operation of the water outlet valve 62 and the water supply pump 121, the water supply pump 121 can pump the water in the first water inlet pipe 111 to the pressurized instant heating module 5. Since the pressurized instant heating module 5 is closed, the water in the pressurized instant heating module 5 is not heated. And since the water outlet valve 62 is powered on at this time, the room temperature water in the pressurized instant heating module 5 flows to the water outlet path 6 and flows out from the water outlet 63 of the water outlet path 6, so as to realize the coffee purifier supplying room temperature water.

[0104] Please see Figure 6 Alternatively, after step S102, the following is included: Step S104: When the drinking water command is a hot water command, control the pressurized instant heating module 5 to operate at the first power.

[0105] Understandably, the coffee maker needs to supply hot water at this time, and the temperature range of hot water is usually between 88℃ and 96℃. Therefore, it is necessary to control the pressurized instant heating module 5 to work, that is, to control the pressurized instant heating module 5 to work at the first power. Based on the operation of the water outlet valve 62 and the water supply pump 121, the water supply pump 121 can pump the water in the first water inlet pipe 111 to the pressurized instant heating module 5 and control the water in the pressurized instant heating module 5 to heat it. Since the water outlet valve 62 is powered on at this time, the heated hot water in the pressurized instant heating module 5 flows to the water outlet path 6 and flows out from the water outlet 63 of the water outlet path 6, so as to realize the supply of hot water to the coffee maker.

[0106] In other embodiments, the drinking water instruction can also be a warm water instruction, with the warm water temperature ranging from 36°C to 87°C. In this case, the pressurized instant heating module 5 operates at a first power to heat the water within the pressurized instant heating module 5, thereby enabling the coffee purifier to supply warm water. Of course, the pressurized instant heating module 5 can also heat the water at other power levels.

[0107] Please see Figure 7 Alternatively, after step S102, the following is included: Step S105: When the drinking water command is a boiling water command, control the pressurized instant heating module 5 to work at the second power, which is greater than the first power.

[0108] Understandably, the coffee maker needs to supply boiling water at this time, and the temperature range of boiling water is usually between 97°C and 100°C. Therefore, it is necessary to control the pressurized instant heating module 5 to work, that is, to control the pressurized instant heating module 5 to work at the second power. Based on the operation of the water outlet valve 62 and the water supply pump 121, the water supply pump 121 can pump the water in the first water inlet pipe 111 to the pressurized instant heating module 5 and control the water in the pressurized instant heating module 5 to heat it. Since the water outlet valve 62 is powered on at this time, the heated boiling water in the pressurized instant heating module 5 flows to the water outlet path 6 and flows out from the water outlet 63 of the water outlet path 6, so as to realize the coffee maker supplying boiling water.

[0109] It should be noted that the second power is greater than the first power. That is, since the drinking water instruction is boiling water, the temperature range of boiling water is higher than that of hot water. By increasing the heating power of the pressurized instant heating module 5, i.e., setting the second power to be greater than the first power, the pressurized instant heating module 5 can heat to the preset temperature in a shorter time to meet the user's water needs and reduce the user's waiting time.

[0110] Please see Figure 8 In some embodiments, step 105 includes: Step 1051: When the preheating mode is activated, control the water supply pump 121 and the outlet valve 62 to close.

[0111] Understandably, since the coffee purifier needs to supply boiling water, which has a high temperature, the preheating mode of the pressurized instant heating module 5 can be activated to increase the heating speed of the pressurized instant heating module 5. That is, the water outlet valve 62 and the water supply pump 121 are powered on to fill the space between the first water inlet pipe 111 and the water outlet of the pressurized instant heating module 5. Then, the water supply pump 121 and the water outlet valve 62 are closed, and the pressurized instant heating module 5 is powered on to heat the water inside the pressurized instant heating module 5.

[0112] The start-up time t1 of the water supply pump 121 is determined by its unit flow rate C11 and the water capacity Q11 from the outlet of the water supply pump 121 to the outlet of the pressurized instant heating module 5, i.e., t1 = Q11 / C11 60. In this way, the water supply pump 121 can be precisely controlled to shut off after the water outlet of the water supply pump 121 and the water outlet of the pressurized instant heating module 5 are filled.

[0113] Step 1052: Control the pressurized instant heating module 5 to heat the water to the first preset temperature with the second power.

[0114] It is understandable that, based on the closure of the water supply pump 121 and the outlet valve 62, and the operation of the pressurized instant heating module 5, the pressurized instant heating module 5 can operate at the second power to heat the water to the first preset temperature, thereby preheating the water in the pressurized instant heating module 5.

[0115] Step 1053: Control the water supply pump 121 to start working after the first preset time after the outlet valve 62 is powered on.

[0116] Understandably, after the water in the pressurized instant heating module 5 is heated to the first preset temperature, the outlet valve 62 is powered on, and after the outlet valve 62 is powered on for a first preset time, the water supply pump 121 is powered on. At this time, both the first inlet pipe 111 and the outlet pipe 61 are connected to the pressurized instant heating module 5, so that the water in the first inlet pipe 111 still flows to the pressurized instant heating module 5.

[0117] Step 1054: Control the pressurized instant heating module 5 to heat the water to the second preset temperature using the second power.

[0118] Understandably, because the temperature of boiling water is high, the pressurized instant heating module 5 still needs to operate at the second power before water flows out of the spout 63 to heat the water to the second preset temperature. The second preset temperature is higher than the first preset temperature, that is, the second preset temperature can be 90℃, 91℃, 92℃, 93℃, etc., to meet the requirement of the coffee purifier to dispense boiling water. The pressurized instant heating module 5 first heats the water to the first preset temperature and then further heats it to the second preset temperature to reduce the user's waiting time.

[0119] Alternatively, step 105 includes: Step 1055: When the non-preheating mode is enabled, control the pressurized instant heating module 5 to heat the water to the second preset temperature with the second power.

[0120] Understandably, when the pressurized instant heating module 5 is in non-preheating mode, the control outlet valve 62 and the water supply pump 121 are powered on to fill the water inlet pipe 111 to the outlet of the pressurized instant heating module 5. Then, the control outlet valve 62 is powered on to heat the water to the second preset temperature, thereby meeting the requirement of the coffee purifier to dispense boiling water.

[0121] In some embodiments, since the pressurized instant heating module 5 can heat the water to a first preset temperature and a second preset temperature using the second power when operating at the second power, the power value of the second power is not fixed and can be adjusted according to different factors. Specifically, step 1054 or step 1055 includes: Step 1056: When water is first added and the preheating mode is activated, adjust the second power according to the unit flow rate of the water supply pump 121, the difference between the inlet and outlet water temperatures of the pressurized instant heating module 5, the heat loss of the first inlet pipe 111, the outlet pipe 61, the pressurized instant heating module 5 and the water supply pump 121, and the heat loss caused by changes in ambient temperature.

[0122] It is understandable that when the first inlet pipe 111 and the outlet pipe 61 are filled with water for the first time, there is no water remaining in the first inlet pipe 111 and the outlet pipe 61. At this time, when the pressurized instant heating module 5 is in preheating mode, its second power can be adjusted according to the unit flow rate of the water supply pump 121, the difference between the inlet and outlet water temperatures of the pressurized instant heating module 5, the heat loss of the first inlet pipe 111, the outlet pipe 61, the pressurized instant heating module 5 and the water supply pump 121, and the heat loss caused by changes in ambient temperature, so as to quickly heat the water to the second preset temperature.

[0123] Alternatively, in step 1057, when water is first added and the non-preheating mode is activated, the second power is adjusted based on the internal water capacity of the pressurized instant heating module 5, the unit flow rate of the water supply pump 121, the difference between the inlet and outlet water temperatures of the pressurized instant heating module 5, the heat loss of the first inlet pipe 111, the outlet pipe 61, the pressurized instant heating module 5 and the water supply pump 121, and the heat loss caused by changes in ambient temperature.

[0124] Understandably, when the first inlet pipe 111 and outlet pipe 61 are initially filled with water, there is no water remaining in the first inlet pipe 111 and outlet pipe 61. At this time, when the pressurized instant heating module 5 is in non-preheating mode, its second power can be adjusted according to the internal water capacity of the pressurized instant heating module 5, the unit flow rate of the water supply pump 121, the difference between the inlet and outlet water temperatures of the pressurized instant heating module 5, the heat loss of the first inlet pipe 111, outlet pipe 61, pressurized instant heating module 5 and water supply pump 121, and the heat loss caused by changes in ambient temperature. At this time, the internal water capacity of the pressurized instant heating module 5 is taken into account so that the second power can be accurately adjusted, thereby quickly heating the water temperature to the second preset temperature.

[0125] Alternatively, in step 1058, when water is not being supplied for the first time and the preheating mode is activated, the second power is adjusted based on the unit flow rate of the water supply pump 121, the difference between the inlet and outlet water temperatures of the pressurized instant heating module 5, the heat loss of the first inlet pipe 111, the outlet pipe 61, the pressurized instant heating module 5 and the water supply pump 121, the heat loss caused by changes in ambient temperature, and the residual water volume between the pressurized instant heating module 5 and the outlet valve 62.

[0126] It is understandable that when the first inlet pipe 111 and outlet pipe 61 are not initially filled with water, residual water remains between the outlet end of the pressurized instant heating module 5 and the outlet valve 62. This residual water will affect the boiling water temperature flowing from the outlet nozzle 63 of the outlet pipe 61, thus impacting the user experience. Therefore, when the pressurized instant heating module 5 starts its preheating mode, the second power of the pressurized instant heating module 5 can be adjusted according to the power of the water supply pump 121. The unit flow rate, the difference between the inlet and outlet water temperatures of the pressurized instant heating module 5, the heat loss of the first inlet pipe 111, outlet pipe 61, pressurized instant heating module 5 and water supply pump 121, the heat loss caused by changes in ambient temperature, and the residual water volume between the pressurized instant heating module 5 and the outlet valve 62 are adjusted to avoid the boiling water flowing out of the outlet 63 being affected by the residual water volume between the pressurized instant heating module 5 and the outlet valve 62, thus solving the problem of the first cup of boiling water having a low temperature.

[0127] Alternatively, in step 1059, when water is not being supplied for the first time and the non-preheating mode is enabled, the second power is adjusted based on the internal water capacity of the pressurized instant heating module 5, the unit flow rate of the water supply pump 121, the difference between the inlet and outlet water temperatures of the pressurized instant heating module 5, the heat loss of the first inlet pipe 111, the outlet pipe 61, the pressurized instant heating module 5 and the water supply pump 121, the heat loss caused by changes in ambient temperature, and the residual water volume between the pressurized instant heating module 5 and the outlet valve 62.

[0128] It is understandable that when the first inlet pipe 111 and outlet pipe 61 are not initially filled with water, residual water remains between the outlet end of the pressurized instant heating module 5 and the outlet valve 62. This residual water will affect the boiling water temperature flowing from the outlet nozzle 63 of the outlet pipe 61, thus impacting the user experience. Therefore, when the pressurized instant heating module 5 starts in non-preheating mode, its second operating power can be determined based on the internal water capacity of the pressurized instant heating module 5, the unit flow rate of the water supply pump 121, and the inlet water temperature of the pressurized instant heating module 5. The temperature difference between the water outlets, the heat loss of the first inlet pipe 111, the outlet pipe 61, the pressurized instant heating module 5 and the water supply pump 121, the heat loss caused by changes in ambient temperature, and the residual water volume between the pressurized instant heating module 5 and the outlet valve 62 are adjusted to avoid the boiling water flowing out of the outlet 63 being affected by the residual water volume between the pressurized instant heating module 5 and the outlet valve 62. At the same time, the internal water capacity of the pressurized instant heating module 5 is taken into account so that the second power can be accurately adjusted, thereby quickly heating the water temperature to the second preset temperature and solving the problem of the first cup of boiling water being too low.

[0129] In some embodiments, the extraction instructions include room temperature extraction instructions and hot extraction instructions.

[0130] Please see Figure 9 Therefore, after step 202, the following steps are included: Step 203: When the extraction command is a room temperature extraction command, control the pressure-bearing instant heating module 5 to shut down.

[0131] Understandably, the coffee dispenser needs to supply room temperature extraction at this time, so room temperature water is required. The temperature range of room temperature water is usually between 5°C and 35°C. Therefore, the pressurized instant heating module 5 is closed. Based on the operation of the coffee valve 221 and the extraction water pump 122, the extraction water pump 122 can pump the water in the second water inlet pipe 112 to the pressurized instant heating module 5. Since the pressurized instant heating module 5 is closed, the water in the pressurized instant heating module 5 is not heated. Since the coffee valve 221 is powered on at this time, the room temperature water in the pressurized instant heating module 5 flows to the extraction water path 2. After extraction by the extraction device 23, the coffee flows out from the extraction nozzle 24, so as to realize the coffee purifier supplying room temperature extraction.

[0132] Please see Figure 10 Or, after step 202, it includes: Step 204: When the extraction command is a hot extraction command, control the pressure-bearing instant heating module 5 to operate at the third power.

[0133] Understandably, the coffee dispenser needs to supply hot brew at this time. The normal temperature for hot brew is 88℃~96℃, and the optimal temperature for hot brew is 92℃~93℃. Therefore, it is necessary to control the operation of the pressurized instant heating module 5, that is, to control the pressurized instant heating module 5 to operate at the third power. Based on the operation of the coffee valve 221 and the extraction water pump 122, the extraction water pump 122 can pump the water in the second water inlet pipe 112 to the pressurized instant heating module 5 and control the water in the pressurized instant heating module 5 to heat up. Since the coffee valve 221 is powered on at this time, the heated hot water in the pressurized instant heating module 5 flows to the extraction water path 2, and after extraction by the extraction device 23, the coffee flows out from the extraction nozzle 24 to realize the supply of hot brew by the coffee dispenser.

[0134] Please see Figure 11 Furthermore, in some embodiments, step 204 includes: Step 2041: When the preheating mode is enabled, control the extraction water pump 122 to close after the coffee valve 221 has been closed for a second preset time; or control the extraction water pump 122 to close synchronously with the coffee valve 221; or control the coffee valve 221 to close after the extraction water pump 122 has been closed for a second preset time.

[0135] Understandably, since the coffee purifier needs to supply hot brew at a temperature of 88℃~96℃, and the hot water temperature is relatively high, in order to improve the heating speed of the pressurized instant heating module 5, the preheating mode of the pressurized instant heating module 5 can be activated; that is, the coffee valve 221 and the extraction water pump 122 are powered on to make the water in the second water inlet pipe 112 and the water outlet of the pressurized instant heating module 5 full, and then the coffee valve 221 and the extraction water pump 122 are closed, and the pressurized instant heating module 5 is operated to heat the water in the pressurized instant heating module 5.

[0136] The start-up time t2 of the extraction water pump 122 is determined by its unit flow rate C21 and the water capacity Q21 from the outlet of the water supply pump 121 to the outlet of the pressurized instant heating module 5, i.e., t2 = Q21 / C21. 60. In this way, the extraction water pump 122 can be precisely controlled to shut off after the water outlet of the extraction water pump 122 and the water outlet of the pressurized instant heating module 5 are filled.

[0137] It should be noted that when the coffee purifier does not execute the hot brewing command, both the extraction water pump 122 and the coffee valve 221 are closed. This differs from the above-mentioned activation of the preheating mode, where the extraction water pump 122 is controlled to close after the coffee valve 221 has been closed for a second preset time; or the extraction water pump 122 and the coffee valve 221 are controlled to close synchronously; or the coffee valve 221 is controlled to close after the extraction water pump 122 has been closed for a second preset time. In this case, the area between the second water inlet pipe 112 and the outlet of the pressurized instant heating module 5 is filled with water.

[0138] Step 2042: Control the pressurized instant heating module 5 to heat the water to the third preset temperature using the third power.

[0139] Understandably, based on the closure of the extraction water pump 122 and the coffee valve 221, and the operation of the pressurized instant heating module 5, the pressurized instant heating module 5 can operate at the third power to heat the water to the third preset temperature, thereby preheating the water in the pressurized instant heating module 5.

[0140] Step 2043: Control the extraction water pump 122 to start working after the coffee valve 221 is powered on for a second preset time; or control the coffee valve 221 to be powered on synchronously with the extraction water pump 122; or control the coffee valve 221 to start working after the extraction water pump 122 is powered on for a second preset time.

[0141] Understandably, after the water in the pressurized instant heating module 5 is heated to the third preset temperature, the coffee valve 221 is powered on, and after the coffee valve 221 is powered on for a first preset time, the extraction water pump 122 is powered on; or the coffee valve 221 and the extraction water pump 122 are powered on synchronously; or the coffee valve 221 is powered on after the extraction water pump 122 is powered on for a second preset time. At this time, both the second water inlet pipe 112 and the extraction pipe 21 are connected to the pressurized instant heating module 5, so that the water in the second water inlet pipe 112 still flows to the pressurized instant heating module 5.

[0142] Step 2044: Control the pressurized instant heating module 5 to heat the water to the fourth preset temperature using the third power.

[0143] Understandably, since the coffee purifier supplies water at a temperature of 88℃~96℃ during hot brewing, the hot water temperature is relatively high. Therefore, before the coffee flows out of the extraction nozzle 24, the pressurized instant heating module 5 still needs to operate at a third power to heat the water to a fourth preset temperature. This fourth preset temperature is higher than the third preset temperature; that is, the fourth preset temperature can be 90℃, 91℃, 92℃, 93℃, etc., to ensure that the coffee purifier dispenses hot water and extracts the hot brewed coffee when the hot water flows to the extraction device 23. Furthermore, the pressurized instant heating module 5 first heats the water to the third preset temperature and then further heats it to the fourth preset temperature to reduce the user's waiting time.

[0144] Furthermore, since there is pressure inside the extraction device 23 when the coffee purifier executes the hot extraction command, the pressure can be released through the extraction nozzle 24 to ensure the safety and reliability of the coffee purifier.

[0145] In this mode, the pipeline of extraction tube 21 between the water outlet of pressurized instant heating module 5 and coffee valve 221 can be shorter, thus shortening the heating time to the third preset temperature.

[0146] Alternatively, step 204 includes: Step 2045: When the non-preheating mode is enabled, control the pressurized instant heating module 5 to heat the water to the fourth preset temperature with the third power.

[0147] Understandably, when the pressurized instant heating module 5 is in non-preheating mode, the coffee valve 221 and the extraction water pump 122 are powered on to fill the space between the second water inlet pipe 112 and the water outlet of the pressurized instant heating module 5. Then, the pressurized instant heating module 5 is powered on to heat the water to the fourth preset temperature. The water can then flow through the extraction pipe 21 into the extraction device 23 to extract the coffee, thereby meeting the hot extraction requirements of the coffee purifier.

[0148] In some embodiments, since the pressurized instant heating module 5 can heat the water to a third preset temperature and a fourth preset temperature at the third power when operating at the third power, the power value of the third power is not fixed and can be adjusted according to different factors. Specifically, step 2044 or step 2045 includes: Step 2046: When water is added for the first time and the preheating mode is activated, adjust the third power according to the unit flow rate of the extraction water pump 122, the difference between the inlet and outlet water temperatures of the pressurized instant heating module 5, the heat loss of the second inlet pipe 112, the extraction pipe 21, the pressurized instant heating module 5 and the extraction water pump 122, and the heat loss caused by changes in ambient temperature.

[0149] It is understandable that when the second water inlet pipe 112 and the extraction pipe 21 are filled with water for the first time, there is no water remaining in the second water inlet pipe 112 and the extraction pipe 21. At this time, when the pressurized instant heating module 5 is in preheating mode, its third power can be adjusted according to the unit flow rate of the extraction water pump 122, the difference between the inlet water temperature and the outlet water temperature of the pressurized instant heating module 5, the heat loss of the second water inlet pipe 112, the extraction pipe 21, the pressurized instant heating module 5 and the extraction water pump 122, and the heat loss caused by changes in ambient temperature, so as to quickly heat the water temperature to the fourth preset temperature.

[0150] Alternatively, in step 2047, when water is initially added and the non-preheating mode is enabled, the third power is adjusted based on the internal water capacity of the pressurized instant heating module 5, the unit flow rate of the extraction water pump 122, the difference between the inlet and outlet water temperatures of the pressurized instant heating module 5, the heat loss of the second inlet pipe 112, the extraction pipe 21, the pressurized instant heating module 5 and the extraction water pump 122, and the heat loss caused by changes in ambient temperature.

[0151] It is understandable that when the second water inlet pipe 112 and the extraction pipe 21 are filled with water for the first time, there is no water remaining in the second water inlet pipe 112 and the extraction pipe 21. At this time, when the pressurized instant heating module 5 is in non-preheating mode, its third power can be adjusted according to the internal water capacity of the pressurized instant heating module 5, the unit flow rate of the extraction water pump 122, the difference between the inlet water temperature and the outlet water temperature of the pressurized instant heating module 5, the heat loss of the second water inlet pipe 112, the extraction pipe 21, the pressurized instant heating module 5 and the extraction water pump 122, and the heat loss caused by changes in ambient temperature. At this time, the internal water capacity of the pressurized instant heating module 5 is taken into consideration so that the third power can be accurately adjusted, thereby quickly heating the water temperature to the fourth preset temperature.

[0152] Alternatively, in step 2048, when water is not being added for the first time and the preheating mode is enabled, the third power is adjusted based on the unit flow rate of the extraction water pump 122, the difference between the inlet and outlet water temperatures of the pressurized instant heating module 5, the heat loss of the second inlet pipe 112, the extraction pipe 21, the pressurized instant heating module 5 and the extraction water pump 122, the heat loss caused by changes in ambient temperature, and the residual water volume between the pressurized instant heating module 5 and the coffee valve 221.

[0153] It is understandable that when the second water inlet pipe 112 and extraction pipe 21 are not filled with water for the first time, there will be residual water between the outlet of the pressurized instant heating module 5 and the coffee valve 221. The amount of residual water between the outlet of the pressurized instant heating module 5 and the coffee valve 221 will also affect the boiling water temperature when the water flows from the extraction pipe 21 to the extraction device 23, thus affecting the extraction quality. Therefore, when the pressurized instant heating module 5 starts the preheating mode, the third power of the pressurized instant heating module 5 can be determined based on the unit flow rate of the extraction water pump 122 and the pressurized instant heating module 221. The temperature difference between the inlet and outlet water of module 5, the heat loss of the second inlet pipe 112, extraction pipe 21, pressurized instant heating module 5 and extraction water pump 122, the heat loss caused by changes in ambient temperature, and the residual water volume between pressurized instant heating module 5 and coffee valve 221 are adjusted to avoid the boiling water flowing from extraction pipe 21 to extraction device 23 being affected by the residual water volume between pressurized instant heating module 5 and coffee valve 221, and to solve the problem of the first cup of hot brew being too low, resulting in poor hot brew quality.

[0154] Alternatively, in step 2049, when water is not being added for the first time and the non-preheating mode is enabled, the third power is adjusted based on the internal water capacity of the pressurized instant heating module 5, the unit flow rate of the extraction water pump 122, the difference between the inlet and outlet water temperatures of the pressurized instant heating module 5, the heat loss of the second inlet pipe 112, the extraction pipe 21, the pressurized instant heating module 5 and the extraction water pump 122, the heat loss caused by changes in ambient temperature, and the residual water volume between the pressurized instant heating module 5 and the coffee valve 221.

[0155] It is understandable that when the second water inlet pipe 112 and extraction pipe 21 are not filled with water for the first time, there will be residual water between the outlet of the pressurized instant heating module 5 and the coffee valve 221. The amount of residual water between the outlet of the pressurized instant heating module 5 and the coffee valve 221 will also affect the boiling water temperature when the water flows from the extraction pipe 21 to the extraction device 23, thus affecting the extraction quality. Therefore, when the pressurized instant heating module 5 is in non-preheating mode, the third power of the pressurized instant heating module 5 can be determined based on the internal water capacity of the pressurized instant heating module 5, the unit flow rate of the extraction water pump 122, and the difference between the inlet and outlet water temperatures of the pressurized instant heating module 5. The heat loss of the second water inlet pipe 112, extraction pipe 21, pressurized instant heating module 5 and extraction water pump 122, the heat loss caused by changes in ambient temperature, and the residual water volume between the pressurized instant heating module 5 and the coffee valve 221 are adjusted to avoid the boiling water flowing from the extraction pipe 21 to the extraction device 23 being affected by the residual water volume between the pressurized instant heating module 5 and the coffee valve 221. At the same time, the internal water capacity of the pressurized instant heating module 5 is taken into account so that the third power can be precisely adjusted, thereby quickly heating the water temperature to the fourth preset temperature and solving the problem of the first cup of hot brew being too low, resulting in poor hot brew quality.

[0156] Please see Figure 1 as well as Figure 12 In some embodiments, a flow meter 15 is also installed on the second inlet pipe 112, which is used to monitor the water flow rate through the second inlet pipe 112 in real time. The control method includes: Step 30: Upon receiving the cleaning command, control the flow meter 15 to read the water flow rate of the second inlet pipe 112 in real time.

[0157] It is understood that the cleaning instructions in this embodiment are mainly for cleaning the second water inlet pipe 112, the pressurized instant heating module 5, and the extraction tube 21. Specifically, upon receiving a cleaning instruction, the flow meter 15 is controlled to operate, enabling the flow meter 15 to read the water flow rate through the second water inlet pipe 112 in real time.

[0158] Step 31: Power on coffee valve 221.

[0159] In this way, the extraction tube 21 is connected to the pressurized instant heating module 5 to indicate that the pressurized instant heating module 5 needs to contain water, and to indicate that the extraction water pump 122 in the second water inlet pipe 112 needs to pump water to the pressurized instant heating module 5.

[0160] Step 32: Control the extraction water pump 122 to start working after the coffee valve 221 is powered on for a second preset time; or, control the extraction water pump 122 to be powered on synchronously with the coffee valve 221.

[0161] In this way, the second water inlet pipe 112 and the extraction pipe 21 are connected to the pressurized instant heating module 5, so that the water in the second water inlet pipe 112 flows to the pressurized instant heating module 5 and the extraction pipe 21, and flows through the coffee valve 221 and the extraction device 23, so as to flow out from the extraction nozzle 24.

[0162] It should be noted that no coffee grounds are placed in the extraction device 23 at this time; the extraction device 23 is only being cleaned. Furthermore, the user needs to place a water container under the extraction nozzle 24 to prevent water flowing from the extraction nozzle 24 from wetting the countertop where the coffee purifier is placed.

[0163] Step 33: When the water flow rate reaches the preset water flow rate, control the extraction water pump 122 to shut off.

[0164] It is understandable that since the flow meter 15 reads the water flow of the second inlet pipe 112 in real time, the flow meter 15 can accumulate the total water flow through the second inlet pipe 112. When the water flow reaches the preset water flow, the extraction water pump 122 is controlled to shut down, so that the second inlet pipe 112 and the pressurized instant heating module 5 are closed, thereby preventing water from continuing to flow to the pressurized instant heating module 5.

[0165] It should be noted that the embodiments of this application do not specifically limit the capacity of the preset water flow rate.

[0166] For example, during the first cleaning, the volume of the preset water flow rate must be greater than or equal to 60 ml to meet the cleaning requirements, and the pressurized instant heating module 5 can be turned off or operated.

[0167] For example, during non-first cleaning and before coffee extraction, since the coffee extraction device 23 may have residual coffee powder from the previous extraction, in order to meet the cleaning requirements, the volume of the preset water flow rate must be greater than or equal to 30 ml, and the pressurized instant heating module 5 must be working.

[0168] For example, in cases other than the initial cleaning and after coffee extraction, since coffee powder may remain in the coffee extraction device 23, the volume of the preset water flow rate needs to be greater than or equal to 30 ml to meet cleaning requirements. Furthermore, in this embodiment, before issuing the cleaning command, the user needs to clean the removable parts of the extraction device 23, then reinstall it and clean it again to further clean the extraction device 23, and the pressurized instant heating module 5 operates.

[0169] Step 34: Control the coffee valve 221 to close after a second preset time since the extraction pump 122 is turned off.

[0170] Understandably, after the extraction water pump 122 is turned off, the coffee valve 221 is closed after a second preset time, thus completing the cleaning and depressurization of the coffee purifier.

[0171] Please see Figure 1 as well as Figure 13 In some embodiments, the coffee purifier includes a pure water tank 3, which is connected to a second water inlet pipe 112, and a flow meter 15 is also installed on the second water inlet pipe 112. The control method includes: Step 40: Upon receiving the descaling command, control the flow meter 15 to read the water flow rate of the second inlet pipe 112 in real time.

[0172] It is understandable that coffee extraction requires high water quality, and water quality varies from region to region. Therefore, after prolonged use of the coffee purifier, scale can easily accumulate in the pipes through which the water flows, affecting the quality of the coffee extraction. Thus, the coffee purifier in this embodiment is equipped with a descaling mode; that is, the user can add an appropriate amount of food-grade citric acid or coffee-specific descaling agent to the pure water tank 3 and stir well. Afterwards, the flow meter 15 is activated to read the water flow rate through the second inlet pipe 112 in real time.

[0173] In this embodiment, the specific timing of the descaling instruction is not limited. For example, the user can be prompted to activate the descaling mode by counting the number of coffee extractions or by monitoring the cumulative water flow during coffee extraction using the flow meter 15. For example, the user can be prompted to activate the descaling mode when the flow meter 15 detects a decrease in coffee flow rate greater than 30%; or when the extraction time for a single cup of coffee increases from 25 seconds to 35 seconds; or when the cumulative usage time of the coffee purifier exceeds two months.

[0174] Step 41: Power on coffee valve 221.

[0175] In this way, the extraction tube 21 is connected to the pressurized instant heating module 5 to indicate that the pressurized instant heating module 5 needs to contain water, and to indicate that the extraction water pump 122 in the second water inlet pipe 112 needs to pump water to the pressurized instant heating module 5.

[0176] Step 42: Control the extraction water pump 122 to start working after the coffee valve 221 is powered on for a second preset time; or control the extraction water pump 122 to be powered on synchronously with the coffee valve 221.

[0177] In this way, the second water inlet pipe 112 and the extraction pipe 21 are connected to the pressurized instant heating module 5, so that the water in the second water inlet pipe 112 flows to the pressurized instant heating module 5 and the extraction pipe 21, and flows through the coffee valve 221 and the extraction device 23, so as to flow out from the extraction nozzle 24.

[0178] It should be noted that no coffee grounds are placed in the extraction device 23 at this time; the extraction device 23 is only being cleaned. Furthermore, the user needs to place a water container under the extraction nozzle 24 to prevent water flowing from the extraction nozzle 24 from wetting the countertop where the coffee purifier is placed.

[0179] Step 43: Control the operation of the pressure-bearing instant heating module 5.

[0180] In this way, the pressurized instant heating module 5 can heat the flowing water to further enhance the descaling effect.

[0181] Step 44: When the flow meter 15 detects that the water flow rate of the second water inlet pipe 112 is the preset water flow rate, control the extraction water pump 122 to shut down.

[0182] Understandably, since the flow meter 15 reads the water flow rate through the second inlet pipe 112 in real time, it can accumulate the total water flow rate through the second inlet pipe 112. When the water flow rate reaches the preset flow rate, it controls the extraction water pump 122 to shut down, thereby closing the connection between the second inlet pipe 112 and the pressurized instant heating module 5. It should be noted that the preset flow rate is to ensure that no water flows through the second inlet pipe 112, that is, the water in the pure water tank 3 is completely drained.

[0183] Step 45: Control the pressure-bearing instant heating module 5 to shut down.

[0184] Understandably, after the extraction pump 122 is turned off, the coffee valve 221 is still powered on. At this time, the water in the pressurized instant heating module 5 will continue to flow to the extraction tube 21. In order to prevent the pressurized instant heating module 5 from continuing to burn dry when there is no water, it is necessary to control the pressurized instant heating module 5 to be turned off.

[0185] Step 46: Control the coffee valve 221 to close after a second preset time after the extraction water pump 122 is turned off, or control the coffee valve 221 and the extraction water pump 122 to close simultaneously.

[0186] That is, after the extraction water pump 122 and the pressurized instant heating module 5 are both turned off, the coffee valve 221 will close after the extraction water pump 122 has been turned off for a second preset time, so as to prevent the extraction nozzle 24 of the extraction tube 21 from continuing to flow water.

[0187] Alternatively, the coffee valve 221 and the extraction pump 122 can be shut off simultaneously to reduce the problem of water still flowing from the outlet of the coffee valve 221 due to residual pressure in the extraction pump 122, thereby shortening the time when coffee liquid continuously flows from the extraction nozzle 24.

[0188] Step 47: Control the pure water tank 3 to refill with water to the highest water level.

[0189] Understandably, after the coffee valve 221 is closed, the pure water tank 3 is refilled with water to the highest level so that the pure water tank 3 is full of water, so that the pure water tank 3, the second water inlet pipe 112, the pressurized instant heating module 5, the extraction pipe 21, the coffee valve 221 and the extraction device 23 can be cleaned in the future.

[0190] It should be noted that users do not need to add food-grade citric acid or coffee-specific descaling agent to the pure water tank 3 at this time.

[0191] Step 48: Re-execute the step of energizing the coffee valve 221, and repeat the above cycle at least twice.

[0192] Understandably, given the uncertain nature of the dirt inside the coffee purifier and the difficulty in cleaning it, coupled with the presence of some descaling agent residue in the water system, it is necessary to re-energize the coffee valve 221 and repeat the aforementioned cycle at least twice to ensure that the water system is cleaned with pure water at least twice. This satisfies the descaling requirement of the coffee purifier while also ensuring its safety for reuse.

[0193] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0194] The above are merely preferred embodiments of this application and are 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. A coffee net drink system characterized by, The coffee purification system is applied to coffee purifiers and includes: The water inlet channel includes an inlet pipe, a water pump installed on the inlet pipe, and a buffer noise reduction device. Along the water flow direction of the inlet pipe, the buffer noise reduction device is located downstream of the water pump. The pressurized instant heating module, connected to the water pump via the inlet pipe, is used to instantly heat the water flowing into the pressurized instant heating module during operation; and... Both the outlet water path and the extraction water path are connected to the pressurized instant heating module, and one of them is connected to the pressurized instant heating module. The pressure that the pressurized instant heating module can withstand is not less than the water pressure when the extraction water circuit extracts coffee.

2. The coffee purification system as described in claim 1, characterized in that, The buffer noise reduction component includes: A buffer noise reduction shell, connected to the water inlet pipe, and having a buffer cavity communicating with the water inlet pipe; and, An elastic diaphragm is disposed within the buffer cavity to buffer the water flow passing through the buffer noise reduction element.

3. The coffee purification system as described in claim 1, characterized in that, The buffer noise reduction component has a buffer flow channel connected to the water inlet pipe, and the buffer flow channel is arranged in a spiral shape.

4. The coffee purification system as described in claim 1, characterized in that, The buffer noise reduction component includes a first pipe section, a buffer pipe section, and a second pipe section connected in sequence. The first pipe section is also connected to the outlet of the water pump through an inlet pipe, and the second pipe section is also connected to the pressurized instant heating module through the inlet pipe. The diameter of the buffer pipe section is larger than that of the first pipe section and the second pipe section.

5. The coffee purification system as described in claim 1, characterized in that, The outer surface of the water pump and / or the buffer noise reduction component is provided with an elastic layer.

6. The coffee purification system as described in claim 1, characterized in that, The pressurized instant heating module includes a thick film heating tube, which can withstand a water pressure of not less than 0.9 MPa.

7. The coffee purification system as described in claim 1, characterized in that, The water inlet pipe includes a first water inlet pipe and a second water inlet pipe, both of which are connected to the pressurized instant heating module; The water pump includes a water supply pump and an extraction water pump respectively installed on the first water inlet pipe and the second water inlet pipe. The pumping water pressure of the extraction water pump is greater than that of the water supply pump. Along the water flow direction of the second water inlet pipe, the buffer noise reduction device is located downstream of the extraction water pump. The water supply pump outputs water through the pressurized instant heating module and the water outlet circuit, and the extraction water pump prepares coffee through the pressurized instant heating module and the extraction water circuit.

8. The coffee purification system as described in claim 7, characterized in that, The first water inlet pipe also includes: A check valve is installed on the first water inlet pipe and located between the water supply pump and the pressurized instant heating module.

9. The coffee purification system as described in claim 8, characterized in that, The check valve includes either a mechanical check valve or a solenoid valve.

10. The coffee purification system as described in claim 7, characterized in that, Also includes: The flow meter is installed on the second inlet pipe; or, it is installed on the common section of the first inlet pipe and the second inlet pipe.

11. The coffee purification system as described in claim 7, characterized in that, The water outlet path includes a water outlet pipe connected to the pressurized instant heating module, and a water outlet valve installed on the water outlet pipe; The extraction water path includes an extraction pipe connected to the pressurized instant heating module, and a coffee valve and an extraction device arranged sequentially on the extraction pipe along the water flow direction. In this configuration, the water outlet valve and the coffee valve are selectively connected. The water supply pump, through the pressurized instant heating module, cooperates with the connected water outlet valve to supply water. The extraction water pump, through the pressurized instant heating module, cooperates with the connected coffee valve and the extraction device to prepare coffee.

12. The coffee purification system as described in claim 11, characterized in that, The water outlet valve and the coffee valve can be replaced by a three-way valve, with the two outlet ends of the three-way valve connected to the water outlet pipe and the extraction pipe, respectively.

13. The coffee purification system as described in claim 1, characterized in that, The pressurized instant heating module includes: An inlet water temperature sensor is installed at the inlet end of the pressurized instant heating module; and, A water temperature sensor is installed at the water outlet of the pressurized instant heating module.

14. The coffee purification system as described in claim 1, characterized in that, Also includes: Pure water system; as well as, The pure water tank has its inlet end connected to the pure water production circuit, and its outlet end connected to the inlet end of the inlet circuit.

15. The coffee purification system as described in claim 14, characterized in that, The pure water tank includes: A low water level detection device, installed on the pure water tank, is used to detect the lowest water level in the pure water tank; and, A high water level detection device is installed on the pure water tank to detect the highest water level in the pure water tank.

16. A coffee purifier, characterized in that, include: The outer casing has a mounting cavity; as well as, The coffee purification system as described in any one of claims 1-15 is installed within the mounting cavity.

17. A control method for a coffee purifier, characterized in that, The control method, applicable to the coffee purifier as described in claim 16, comprises: Upon receiving a drinking water instruction, the system controls both the inlet and outlet water paths to be connected to the pressurized instant heating module. Upon receiving an extraction command, the system controls both the inlet water path and the extraction water path to be connected to the pressurized instant heating module.

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