Coffee purifying and drinking system and coffee purifying and drinking machine

Abstract

The embodiment of the invention discloses a purified coffee drinking system and a purified coffee drinking machine. The purified coffee drinking system comprises a water inlet waterway, a pressure-bearing instant heating module, an extraction waterway, a normal-temperature extraction waterway and an extraction device. The water inlet waterway comprises a water inlet pipe and a water pump arranged on the water inlet pipe, the pressure-bearing instant-heating module is communicated with the water pump through the water inlet pipe, the extraction waterway comprises an extraction pipe, the water inlet end of the extraction pipe is connected with the pressure-bearing instant-heating module, the normal-temperature extraction waterway comprises a normal-temperature extraction pipe, and the water inlet end of the normal-temperature extraction pipe is connected with the water pump. And the extraction device is communicated with the extraction water path or the normal-temperature extraction water path. According to the embodiment of the invention, two flow paths can be selected for normal-temperature extraction, so that the waiting time of normal-temperature extraction of the coffee purifying and drinking machine is shortened.

Description

Technical Field

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

[0002] When a coffee machine integrates both room temperature extraction and hot extraction, the temperature required for room temperature extraction is lower than that required for hot extraction. However, because the water temperature in the heater is higher after hot extraction, the coffee machine cannot immediately achieve room temperature extraction of coffee. Users need to wait for the heater to cool down or cool it down by draining or replenishing water. This requires a long waiting time, resulting in a poor user experience. Summary of the Invention

[0003] This application provides a coffee purification system and a coffee purifier, which aims to reduce the waiting time for room temperature extraction in coffee purifiers and improve the user experience.

[0004] A first aspect of this application provides a coffee purification system for use in a coffee purifier, the coffee purification system comprising: The water inlet system includes an inlet pipe and a water pump installed on the inlet pipe; The pressurized instant heating module is connected to the water pump through the water inlet pipe and is used to heat the water flowing into the pressurized instant heating module instantly during operation. The extraction water path includes an extraction tube, the inlet end of which is connected to the pressurized instant heating module; A room-temperature extraction water circuit includes a room-temperature extraction tube, the inlet of which is connected to the water pump; and, The extraction device is connected to the extraction water circuit or to the room temperature extraction water circuit.

[0005] In some embodiments, 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 installed on the first water inlet pipe and an extraction water pump installed on the second water inlet pipe. The water pressure of the extraction water pump is greater than that of the water supply pump. The ambient temperature extraction tube is connected to the outlet of the extraction water pump and the extraction device.

[0006] In some embodiments, the ambient temperature extraction water path further includes: The first coffee valve is installed on the ambient temperature extraction tube and is located between the extraction water pump and the extraction device.

[0007] In some embodiments, the extraction water path further includes: A second coffee valve is disposed on the extraction tube and located between the pressurized instant heating module and the extraction device; and, The third coffee valve is disposed on the extraction tube and located between the second coffee valve and the extraction device; When the second coffee valve and the third coffee valve are connected to the extraction device, the first coffee valve is in the closed state; When the first coffee valve is connected to the extraction device, the second coffee valve and the third coffee valve are in the closed state.

[0008] In some embodiments, the second coffee valve is a first pressure relief component, which has a first inlet, a first outlet and a first pressure relief port. The first inlet is connected to the pressurized instant heating module and the first outlet is connected to the extraction device. When the second coffee valve is in the open state, the first inlet is connected to the first outlet but not to the first pressure relief port; When the second coffee valve is closed, the first pressure relief port is connected to the first water outlet, but not to the first water inlet, in order to relieve pressure on the extraction device.

[0009] In some embodiments, the coffee purification system further includes: Water receiving device; and, A first pressure relief pipe is connected to the water receiving device and the first pressure relief port, so that the fluid flowing out of the first pressure relief port is collected in the water receiving device through the first pressure relief pipe.

[0010] In some embodiments, the water inlet path further includes: The second pressure relief component is located downstream of the extraction water pump along the water flow direction of the inlet pipe. The second pressure relief component is used to relieve pressure on the pipeline downstream of the extraction water pump. The inlet end of the ambient temperature extraction tube is connected to the outlet end of the second pressure relief component.

[0011] In some embodiments, the second pressure relief component includes: The mechanical pressure relief valve has both its inlet and outlet ends connected to the inlet pipe, and its outlet end is also connected to the ambient temperature extraction pipe. The mechanical pressure relief valve has a second pressure relief port. When the pipeline pressure between the extraction water pump and the extraction device is greater than the preset pressure, the mechanical pressure relief valve opens the second pressure relief port to release pressure.

[0012] In some embodiments, the mechanical pressure relief valve is provided with a check valve structure to prevent water from flowing back from the outlet end to the inlet end; and / or, The second pressure relief port is also used to discharge air from the water inlet path when the extraction water pump is pumping water.

[0013] In some embodiments, the coffee purification system further includes: A pure water tank is connected to both the first water inlet pipe and the second water inlet pipe; and, A flow meter is installed on the second inlet pipe.

[0014] In some embodiments, the water inlet pipe further includes a common water inlet pipe, and the coffee purification system further includes: A pure water tank is connected to the inlet end of the shared inlet pipe, and the outlet end of the shared inlet pipe is connected to both the first and second inlet pipes; and, A flow meter is installed on the shared inlet pipe.

[0015] In some embodiments, the water inlet path further includes: A pressure sensor is installed on the second water inlet pipe and located between the extraction water pump and the pressurized instant heating module.

[0016] In some embodiments, the water inlet path further 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.

[0017] In some embodiments, the check valve includes one of a mechanical check valve and a solenoid valve.

[0018] In some embodiments, the coffee purification system further includes: In some embodiments, the outlet water path is connected to the pressurized instant heating module, and either the outlet water path or the extraction water path is connected to the pressurized instant heating module. The water supply pump connects to the outlet water circuit via the pressurized instant heating module to deliver water.

[0019] 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; 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.

[0020] In some embodiments, the water outlet path further includes: A reversing valve is installed on the outlet pipe and along the water flow direction of the outlet pipe. The reversing valve is located downstream of the outlet valve and has a second inlet, a second outlet and a third outlet. The second inlet is connected to the outlet valve. The coffee purification system also includes a return pipe and a water outlet. The return pipe is connected to the second water outlet, and the third water outlet is connected to the water outlet. The second inlet is connected to either the second outlet or the third outlet.

[0021] In some embodiments, the coffee purification system further includes: Pure water system; and, 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 pipe.

[0022] In some embodiments, 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.

[0023] A second aspect of this application provides a coffee purifier, comprising: The housing has a mounting cavity; and, The coffee purification system described in any of the above items is installed within the mounting cavity.

[0024] This application embodiment offers two selectable flow paths for room temperature extraction. Thus, when the user needs to prepare room temperature coffee immediately after the coffee purifier system has finished preparing hot coffee, the system can control the extraction device to connect to the room temperature extraction water path. In this case, pure water does not need to flow through the pressurized instant heating module, preventing the room temperature extraction water temperature from being too high and affecting the quality of the coffee. Furthermore, the user only needs to wait for the water in the pressurized instant heating module to cool down before the system can prepare room temperature coffee, reducing the waiting time and improving the user experience. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the water circuit of the coffee purification system provided in the first embodiment of this application; Figure 2 This is a schematic diagram of the water circuit of the coffee purification system provided in the second embodiment of this application; Figure 3 This is a schematic diagram of the water circuit of the coffee purification system provided in the third embodiment of this application; Figure 4 This is a schematic diagram of the water circuit of the coffee purification system provided in the fourth embodiment of this application; Figure 5 This is a schematic diagram of the water circuit of the coffee purification system provided in the fifth embodiment of this application; Figure 6 This is a schematic diagram of the water circuit of the coffee purification system provided in the sixth embodiment of this application; Figure 7 This is a schematic diagram of the water circuit of the coffee purification system provided in the seventh embodiment of this application; Figure 8 This is a schematic diagram of the water circuit of the coffee purification system provided in the eighth embodiment of this application; Figure 9 A schematic diagram of the water circuit of a coffee purification system provided in the ninth embodiment of this application.

[0027] Reference numerals in the attached diagram: 1. Water inlet circuit; 11. Water inlet pipe; 111. First water inlet pipe; 112. Second water inlet pipe; 12. Water pump; 121. Water supply pump; 122. Extraction water pump; 13. Second pressure relief component; 131. Mechanical pressure relief valve; 132. Second pressure relief pipe; 133. Check valve; 14. Non-return valve; 15. Flow meter; 16. Buffer and noise reduction component; 2. Extraction circuit; 21. Extraction pipe; 22. First pressure relief component; 221. Second coffee valve; 222. First pressure relief pipe; 223. Third 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 device; 5. Pressurized instant heating module; 6. Water outlet path; 61. Water outlet pipe; 62. Water outlet valve; 63. Water outlet nozzle; 64. Reversing valve; 65. Return pipe; 7. Water tank; 8. Filter assembly; 81. First-stage filter assembly; 82. Second-stage filter assembly; 9. Room temperature extraction water path; 91. Room temperature extraction pipe; 92. First coffee valve. Detailed Implementation

[0028] 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.

[0029] This application provides a coffee purifier that can reduce the risk of coffee machine pipe rupture and improve the safety of coffee machine use.

[0030] Specifically, the coffee purifier in this embodiment includes a housing and a coffee purification system installed inside the housing.

[0031] The outer casing, serving as the external structure of the coffee purifier, is used to install and protect the internal coffee purification system. For example, the casing has an internal mounting cavity that provides space for the coffee purification system and other internal components. The casing can be manufactured using injection molding, employing engineering plastics such as ABS and PC, resulting in a lightweight and low-cost structure. Alternatively, the casing can be made of metal (such as stainless steel or aluminum alloy), manufactured through processes like stamping and welding. Metal casings offer a more robust structure, enhancing the product's durability and stability.

[0032] Please see Figures 1-3 The coffee purification system is the core of the coffee purifier, which includes water inlet path 1, extraction water path 2, and room temperature extraction water path 9.

[0033] The water inlet circuit 1 includes an inlet pipe 11 and a water pump 12 mounted on the inlet pipe 11. The inlet pipe 11 serves as a channel guiding water flow into the water inlet circuit 1 and the extraction circuit 2, used to deliver source water or filtered and purified water (mentioned below) 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 arrangement; the inlet pipe 11 can also be a PPR (polypropylene random) pipe, which offers various connection methods (such as heat fusion connection) and good sealing to prevent leakage.

[0034] Furthermore, since the inlet pipe 11 connected to the outlet of the water pump 12 needs to be pressurized, the inlet pipe 11 after the outlet of the water pump 12 can be made of Teflon pipe, PE pipe, etc., which can withstand high pressure. However, the inlet pipe 11 before the inlet 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 of the water pump 12 can be made of silicone pipe or plastic pipe with lower strength.

[0035] The water pump 12 serves as the power source for the water inlet channel 1, propelling the water flow within the channel. In this embodiment, the water pump 12 can be an electromagnetic pump, a plunger pump, or a positive displacement pump (AC or DC). All of these different types of water pumps 12 can provide sufficient power to the water inlet channel 1, enabling the water to enter the extraction channel 2 and complete the coffee preparation.

[0036] In addition to high water pressure, coffee extraction usually requires high water temperature. For example, the extraction temperature of espresso is usually 88-96℃. Therefore, the coffee purification system of this application also includes a pressurized instant heating module 5 for instantly heating the water flowing into the pressurized instant heating module 5.

[0037] Please continue reading. Figures 1-3 In the coffee purification system of this embodiment, the pressurized instant heating module 5 is connected to the water pump 12 through the water inlet pipe 11. When working, it is used to heat the water flowing into the pressurized instant heating module 5 instantly. That is, the water inlet of the pressurized instant heating module 5 is connected to the water pump 12 through the water inlet pipe 11, and the water pump 12 pumps the water into the pressurized instant heating module 5.

[0038] In this embodiment, the extraction water path 2 includes an extraction tube 21, and the coffee purification system also includes an extraction device 23.

[0039] The extraction tube 21 is a channel connecting the water inlet pipe 11 and the extraction device 23. It is used to transport the pressurized water from the water inlet pipe 1 to the extraction device 23 to extract coffee. The extraction tube 21 can be made of high-pressure resistant Teflon tubing or PE tubing, etc.

[0040] The extraction device 23 in this embodiment is the core component of the coffee purifier for coffee extraction. The extraction device 23 can be a capsule extraction device or a powder extraction device. A capsule extraction device uses a puncture needle to puncture a coffee capsule, allowing high-pressure water to pass through the coffee grounds layer to extract the coffee liquid. A powder extraction device, on the other hand, places coffee grounds in a portafilter and attaches it to the extraction device 23 via a handle or other structural support; high-pressure water then passes through the coffee grounds layer for extraction. After extraction, re-extraction requires disassembling the capsule holder, portafilter handle, or portafilter tray. However, during extraction, the extraction nozzle 24 of the extraction device 23 may become clogged, leading to high internal pressure and making disassembly difficult.

[0041] The inlet of the extraction tube 21 is connected to the pressurized instant heating module 5; that is, the outlet of the pressurized instant heating module 5 is connected to the extraction tube 21 to supply hot water to the extraction device 23. The pressurized instant heating module 5 in this embodiment adopts instant heating technology, which can heat the water to a preset temperature during the rapid flow of water, avoiding the problem of water quality degradation caused by repeated heating in traditional water storage heating.

[0042] The pressurized instant heating module 5 in this embodiment also has pressure-bearing capacity, and the water pressure it can withstand is no less than the water pressure when extracting coffee in the extraction water channel 2. Normally, the water pressure is high during coffee extraction, and the pressurized instant heating module 5 can still operate stably under high pressure, ensuring that the heating function is not affected and preventing leaks, bursts, or other problems. At the same time, the pressurized instant heating module 5 also has a heat resistance of no less than 100℃, ensuring the reliability and safety of the pressurized instant heating module 5 in high-temperature operating environments.

[0043] 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, it can maintain stable operation. 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 can protect the pipeline.

[0044] In this embodiment, the thick-film heating element can quickly convert electrical energy into heat energy, enabling instant heating of the water flow. 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.

[0045] 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.

[0046] 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.

[0047] In some embodiments, the pressurized instant heating module 5 further includes an inlet water temperature sensor and an outlet water temperature sensor. The inlet water temperature sensor is located at the water inlet of the module and can monitor the initial temperature of the water flowing into the pressurized instant heating module 5 in real time, collecting data for adjusting the heating power of the pressurized instant heating 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 water outlet of the module and is used to provide real-time feedback on the water temperature after heating. 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 during coffee extraction and thus improving coffee quality.

[0048] 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.

[0049] When local temperatures become too high, the pipe surface temperature sensor 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 safety and reliability of the pressurized instant heating module 5 and ensures the stable operation of the coffee purification system.

[0050] Please continue reading. Figures 1-3 Furthermore, this embodiment of the application also includes a room temperature extraction water path 9, which includes a room temperature extraction tube 91, wherein the water inlet end of the room temperature extraction tube 91 is connected to the water pump 12. The extraction device 23 can be connected to the extraction water path 2, or the extraction device 23 can be connected to the room temperature extraction water path 91.

[0051] Understandably, when a user needs hot coffee, pure water flows into the pressurized instant heating module 5 from the inlet pipe 11. The pressurized instant heating module 5 operates to heat the water in it, and the hot water flows into the extraction water path. At this time, the extraction device is connected to the extraction water path to prepare hot coffee using hot water. When a user needs room temperature coffee, pure water flows into the pressurized instant heating module 5 from the inlet pipe 11, and the pressurized instant heating module 5 is turned off. At this time, the pressurized instant heating module 5 does not heat the water, allowing room temperature water to flow into the extraction water path. At this time, the extraction device is connected to the extraction water path to prepare hot coffee using room temperature water. Alternatively, when a user needs room temperature coffee, pure water flows into the room temperature extraction water path 9 from the inlet pipe 11. At this time, the extraction device is connected to the room temperature extraction water path 9 to prepare hot coffee using room temperature water.

[0052] In other words, this embodiment offers two selectable flow paths for room temperature extraction. Thus, when the user needs to prepare room temperature coffee immediately after the coffee purifier system has finished preparing hot coffee, the system can control the extraction device 23 to connect with the room temperature extraction water path 9. At this time, pure water does not need to flow through the pressurized instant heating module 5, preventing the water temperature from being too high and affecting the quality of the room temperature coffee extraction. Furthermore, the user only needs to wait for the water in the pressurized instant heating module 5 to cool down before the system can prepare room temperature coffee, reducing the waiting time and improving the user experience.

[0053] It should be noted that the extraction device 23 may have a single water inlet extraction port, which can be connected to both the ambient temperature extraction tube 91 and the extraction tube 21. In this case, an additional solenoid valve is required to control the connection between the water inlet extraction port and either the ambient temperature extraction tube 91 or the extraction tube 21. Alternatively, the extraction device may have two water inlets extraction ports, one connected to the extraction tube 21 and the other connected to the ambient temperature extraction tube 91. In this case, no additional solenoid valve is needed, thus saving costs. This application does not specifically limit the embodiments in this regard.

[0054] Please continue reading. Figures 1-3 In some embodiments, the water inlet pipe 11 includes a first water inlet pipe 111 and a second water inlet pipe 112, which are respectively connected to the pressurized instant heating module 5. The water pump 12 includes a water supply pump 121 installed on the first water inlet pipe 111 and an extraction water pump 122 installed 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 of the system.

[0055] The extraction pump 122 can be an electromagnetic pump, a plunger pump, a positive displacement pump (AC or DC), etc. During the initial operation of the extraction pump 122, there will be a gradual pressure increase. This process requires precise control of the extraction pressure within a preset extraction pressure value, such as 9 bar for a gold cup extraction, and simultaneously, the extraction pressure needs to be stabilized within the preset extraction pressure value. Therefore, in this embodiment, an external one-way valve can be installed at the inlet of the extraction device 23. The one-way valve will only open the water inlet channel when the extraction pressure reaches the preset extraction pressure value; or, a one-way valve can be embedded at the inlet of the extraction device 23, so that the one-way valve only opens the water inlet channel when the extraction pressure reaches the preset extraction pressure value.

[0056] 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. For example, the diaphragm of the water supply pump 121 forms a sealing structure with a valve plate, possessing a backflow pressure of not less than 2.0 MPa to prevent high-pressure water from 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 ≥100 ml / min, thereby meeting daily hot water supply needs.

[0057] The water supply pump 121 pumps water through the first inlet pipe 111 to the pressurized instant heating module 5. After heating, hot water is output through the outlet water path 6, which can be used for daily drinking water, tea brewing, and other needs. The relatively low water pressure is sufficient to meet the water pressure requirements of such usage scenarios. The extraction water pump 122 pressurizes water through the second inlet pipe 112 and delivers it to the pressurized instant heating module 5. Then, it is used in conjunction with the extraction device 23 through the extraction water path 2 to prepare coffee. Since coffee extraction requires higher pressure to fully extract the effective components in the coffee powder, the higher pumping pressure of the extraction water pump 122 ensures the efficient operation of the coffee extraction process.

[0058] The extraction water pump 122 has two control methods. The first is for simple electronic control hardware configurations, such as those without the thyristor required for precise chopper control of the 220V extraction water pump 122. In this case, the extraction water pump 122 only needs to perform on / off functions. The second is for electronic control hardware devices that provide precise control of the 220V extraction water pump 122. In this case, chopper adjustment is used to change the operating frequency and duty cycle of the extraction water pump 122 to further achieve precise output of extraction pressure and output water flow.

[0059] When the extraction pump 122 is working, a large suction negative pressure is generated at the inlet of the extraction pump 122 when it starts pumping water. At this time, the suction negative pressure may be higher than 0.35 bar, and this suction negative pressure will act on the inlet of the supply pump 121. However, when the negative pressure at the inlet of the supply pump 121 is greater than 0.15 bar, cavitation of the diaphragm of the supply pump 121 is easily caused, which will affect the service life of the supply pump 121. Therefore, in some embodiments, the inlet of the first inlet pipe 111 is directly connected to the pure water tank 3, and the inlet of the second inlet pipe 112 is directly connected to the pure water tank 3 to solve the problem of cavitation of the diaphragm of the supply pump 121.

[0060] The aforementioned room temperature extraction tube 91 is connected to the outlet of the extraction water pump 122 and the extraction device 23. Specifically, the inlet of the room temperature extraction tube 91 is connected to the outlet of the extraction water pump 122, and the outlet of the room temperature extraction tube 91 is connected to the extraction device 23. Thus, when the user needs room temperature coffee, the extraction water pump 122 operates to pump pure water from the second inlet pipe 112 to the room temperature extraction tube 91. At this time, the room temperature water flows into the extraction device 23, and the extraction device 23 uses the room temperature water to extract coffee.

[0061] Please continue reading. Figures 1-3In some embodiments, the ambient temperature extraction water path 9 further includes a first coffee valve 92, which is disposed on the ambient temperature extraction tube 91 and located between the extraction water pump 122 and the extraction device 23. It is understood that the first coffee valve 92 can be an electrically operated coffee valve, normally in a closed state. When the user needs to prepare ambient temperature coffee, the system's control module can control the first coffee valve 92 to open, allowing ambient temperature water to flow into the extraction device 23 along the ambient temperature extraction water path 9. The first coffee valve 92 has a pressure-bearing capacity of not less than 2.0 MPa and a heat resistance temperature of not less than 140°C to meet the pressure-bearing capacity and temperature requirements for ambient temperature extraction.

[0062] Please continue reading. Figures 1-3 In some embodiments, the extraction water path 2 further includes a second coffee valve 221 and a third coffee valve 223. The second coffee valve 221 is disposed on the extraction tube 21 and is located between the pressurized instant heating module 5 and the extraction device 2. It is understood that the second coffee valve 221 can be an electrically operated three-way valve, which can both allow water to flow from the pressurized instant heating module 5 to the extraction device 2 and depressurize the extraction device 23 and the pipeline between the second coffee valve 221 and the extraction device 23 to ensure stable extraction pressure.

[0063] The third coffee valve 223 is disposed on the extraction tube 21 and located between the second coffee valve 221 and the extraction device 23. The third coffee valve 223 can be an electric coffee valve, normally in the closed state. When the user needs to prepare room temperature coffee, the system control module can control the third coffee valve 223 to open, allowing water to flow along the extraction tube 21 into the extraction device 23. The third coffee valve 223 has a pressure-bearing capacity of not less than 2.0 MPa and a heat resistance temperature of not less than 140°C to meet the pressure and temperature requirements for extraction. In this embodiment, by setting the second coffee valve 221 and the third coffee valve 223, the conduction control between the extraction device 23 and the pressure-bearing instant heating module 5 is made more precise.

[0064] It should be noted that when the second coffee valve 221 and the third coffee valve 223 are connected to the extraction device 23, the first coffee valve 92 is in the closed state; when the first coffee valve 221 is connected to the extraction device 23, the second coffee valve 221 and the third coffee valve 223 are in the closed state. That is, when the user needs to prepare hot coffee, the second coffee valve 221 and the third coffee valve 223 are connected to the extraction device 23 so that the hot water flowing from the pressurized instant heating module 5 flows through the extraction tube 21 and into the extraction device 23. When the user needs to prepare room temperature coffee, the second coffee valve 221 and the third coffee valve 223 are connected to the extraction device 23 so that the room temperature water flowing from the pressurized instant heating module 5 flows through the extraction tube 21 and into the extraction device 23; or, the first coffee valve 221 is connected to the extraction device 23 so that the room temperature water flows through the second water inlet pipe 112 and the room temperature extraction tube 91 and into the extraction device 23.

[0065] In some other embodiments, the extraction water path 2 may include a second coffee valve 221, which is an electric three-way valve that can both allow water to flow from the pressurized instant heating module 5 to the extraction device 2 and depressurize the extraction device 23 and the pipeline between the second coffee valve 221 and the extraction device 23 to ensure stable extraction pressure.

[0066] This embodiment incorporates a first pressure relief component 22 at the water inlet of the extraction device 23. Specifically, the first pressure relief component 22 is installed on the extraction pipe 21 to relieve pressure in the extraction water path 2, particularly in the pipeline between the first pressure relief component 22 and the extraction device 23, as well as inside the extraction device 23. When the extraction nozzle 24 of the extraction device 23 becomes clogged, the internal pressure of the extraction device 23 will rise rapidly. If the pressure is not relieved in time, it will be difficult for the user to disassemble the capsule holder, the portafilter handle, or the portafilter, and may even damage the extraction device 23. This embodiment relieves pressure using the first pressure relief component 22. For example, the first pressure relief component 22 includes an electric three-way valve. One of the ports of this three-way valve is the first pressure relief port. When extraction is complete, the first pressure relief port is connected to the inside of the extraction device 23, thereby opening the pressure relief channel and reducing the internal pressure of the extraction device 23. The first pressure relief component 22 in this embodiment not only facilitates the user's maintenance and cleaning of the extraction device 23 but also protects the extraction device 23 from damage caused by excessive pressure, improving the convenience and reliability of the coffee purifier.

[0067] Please continue reading. Figures 1-3 The coffee purification system in this embodiment also includes a water receiving device 4, which is connected to the first pressure relief component 22 and is used to collect fluids (such as water flow, gas, etc.) generated by the pressure relief of the first pressure relief component 22. The water receiving device 4 can be an independent water storage box, a water receiving tray, or a pure water tank or raw water tank integrated into the machine body.

[0068] When the first pressure relief component 22 is activated, the fluid flows into the water collection device 4, preventing water from being directly discharged into or outside the coffee machine, thus keeping the coffee machine clean. In this embodiment, the water collection device 4 centrally collects the pressure relief fluid, preventing water leakage inside the coffee machine and improving user maintenance convenience.

[0069] This application provides a first pressure relief component 22 at the water inlet of the extraction device 23. After extraction is completed, the first pressure relief component 22 opens the interior of the extraction device 23, thereby reducing the internal pressure of the extraction device 23. This not only facilitates the maintenance and cleaning of the extraction device 23 by the user, but also protects the extraction device 23 from damage caused by excessive pressure, thus improving the convenience and reliability of the coffee purifier.

[0070] In some embodiments, the second coffee valve 221 is a first pressure relief component 22. The first pressure relief component 22 has three interfaces: a first water inlet, a first water outlet, and a first pressure relief port. The first water inlet is connected to the water inlet pipe 11 and is used to receive the water flow after being pressurized by the water pump 12 and heated by the pressurized instant heating module 5. The first water outlet is connected to the extraction device 23 and delivers hot water to the extraction device 23.

[0071] The second coffee valve 221 has two operating states: When it is open, the internal valve core connects the first inlet and the first outlet, allowing water to flow from the inlet to the outlet, providing hot water to the extraction device 23. The first pressure relief port is closed, not connected to other interfaces, ensuring normal water supply. When the second coffee valve 221 is closed, the valve core position changes, connecting the first pressure relief port to the first outlet. This isolates the first inlet from other interfaces, allowing residual high-pressure water in the extraction device 23 to be discharged through the first outlet and the first 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.

[0072] Please see Figures 3-4 In some embodiments, the coffee purification system also includes a first pressure relief pipe 222 and a water receiving device 4.

[0073] In the coffee purification system of this embodiment, the water receiving device 4 and the first pressure relief pipe 222 constitute a pressure relief and recovery module. The water receiving device 4 is used to collect the water discharged from the first pressure relief component 22. The first pressure relief pipe 222 connects the pressure relief port of the second coffee valve 221 with the water receiving device 4, and is used to guide the pressure relief water flow to the water receiving device 4.

[0074] In this embodiment, whether it is the pressure relief after the extraction nozzle 24 of the extraction device 23 is blocked, or the normal pressure relief after daily coffee extraction, the first pressure relief component 22 can ensure that the water flow is smooth and orderly during the pressure relief, avoid water splashing everywhere, keep the inside of the coffee machine clean, and also improve the safety of user operation.

[0075] Regarding the connection method, the first pressure relief port of the second coffee valve 221 can be connected to the water receiving device 4 in multiple ways. For example, a flexible hose can be used, which has good flexibility, is easy to arrange inside the coffee machine, and can effectively buffer the impact of water flow; a rigid pipe can also be used, which has better stability and durability; in addition, the second coffee valve 221 can be connected to the plastic + rubber combination structure on the product structure body by fitting together. This connection method does not require additional fittings, simplifies the structure, and the rubber part can provide good sealing to prevent water leakage during pressure relief.

[0076] In some embodiments, the second coffee valve 221 needs to withstand high pressure and high temperature environments in the coffee purification system. To improve the reliability and service life of the second coffee valve 221, in terms of pressure resistance, the second coffee valve 221 can withstand a water pressure of not less than 2.0 MPa, ensuring that the second coffee valve 221 can avoid structural damage and maintain its sealing performance under normal operating pressure of the extraction water circuit 2 and under possible pressure fluctuations. For example, when the water pump 12 starts up due to water hammer or when the pressure rises due to a brief blockage of the extraction device 23, the second coffee valve 221 can withstand high pressure impacts to prevent problems such as rupture and leakage, thereby ensuring the safe operation of the entire extraction water circuit 2.

[0077] In terms of heat resistance, the second coffee valve 221 can withstand water temperatures no lower than 100℃. During coffee extraction, the hot water temperature is typically high, and some coffee extraction processes (such as espresso extraction) even require water temperatures close to boiling point. The second coffee valve 221 in this embodiment possesses high heat resistance, maintaining structural stability and mechanical properties under high-temperature environments. This prevents deformation, aging, or sealing failure caused by high temperatures, ensuring that the second coffee valve 221 maintains good working condition throughout use, thereby guaranteeing the stability of the coffee purification system.

[0078] In some embodiments, the first pressure relief pipe 222 is a heat-resistant hose. For example, the first pressure relief pipe 222 can withstand water temperatures of not less than 100°C. The heat-resistant hose can be made of materials such as silicone or rubber, which can maintain good flexibility and physical stability in high-temperature environments. During the coffee extraction process, the water temperature after being heated by the pressurized instant heating module 5 may approach or reach 100°C. When the extraction device 23 performs a pressure relief operation, the high-temperature water flows through the first pressure relief pipe 222 to the water receiving device 4. The heat-resistant hose can effectively withstand the impact of the high-temperature water flow, preventing the hose from deforming, hardening, or releasing harmful substances due to excessive temperature, ensuring a safe and reliable pressure relief process. Furthermore, the hose's flexibility makes it easy to install and arrange in the confined space inside the coffee machine, improving the compactness and reliability of the coffee purification system.

[0079] Because the extraction pump 122 usually needs to provide high pressure during the coffee preparation process, the pipes in the water circuit, especially the pipes downstream of the extraction pump 122, may be at risk of rupture.

[0080] Therefore, please refer to Figures 4-6 In some embodiments, the water inlet path 1 further includes a second pressure relief component 13. Along the water flow direction of the water inlet pipe 11, the second pressure relief component 13 is located downstream of the extraction water pump 122. The second pressure relief component 13 is used to relieve pressure on the pipeline downstream of the extraction water pump 122. That is, when the pressure of the water inlet path 1 reaches the preset pressure, the water inlet path 1 automatically relieves pressure through the second pressure relief component 13, thereby maintaining the pressure of the pipeline downstream of the extraction water pump 122 below the preset pressure, thus preventing the pipeline downstream of the extraction water pump 122 from rupturing due to excessive pressure, and protecting the pipeline in the water inlet path 1 and the extraction water path 2 (extraction pipe 21, extraction device 23, etc.) located downstream of the extraction water pump 122.

[0081] The inlet end of the ambient temperature extraction tube 91 is connected to the outlet end of the second pressure relief component 13. When the pressure of the inlet water circuit 1 reaches the preset pressure, the inlet water circuit 1 automatically releases pressure through the second pressure relief component 13, which can also protect the ambient temperature extraction tube 91.

[0082] In some embodiments, the second pressure relief component includes a mechanical pressure relief valve 131. The inlet and outlet of the mechanical pressure relief valve 131 are both connected to the inlet pipe 11, and the outlet is also connected to the ambient temperature extraction pipe 91. The mechanical pressure relief valve 131 has a second pressure relief port. When the pipeline pressure between the extraction water pump 122 and the extraction device 23 exceeds a preset pressure, the mechanical pressure relief valve 131 opens the second pressure relief port to release pressure.

[0083] The mechanical pressure relief valve 131 has an internal elastic element (such as a spring) and a valve core assembly. When the pressure in the inlet water passage 1 exceeds the threshold set by the spring preload, the valve core is pushed open, the second pressure relief port opens, and excess water is discharged through the second pressure relief port. In this embodiment, the pressure relief valve adopts a purely mechanical structure, requiring no external energy drive, and responds automatically based on pressure difference, resulting in low cost and simple maintenance.

[0084] In some embodiments, the preset pressure is not less than 0.9 MPa. For example, the preset pressure is set between 1.2 and 2.0 MPa. During coffee extraction, a brewing pressure of approximately 0.9 to 1.2 MPa is typically required to dissolve the active ingredients in the coffee powder and achieve optimal extraction results. At this pressure, the pipeline downstream of the extraction pump 122 must withstand pressure surges from the extraction pump 122. If the preset pressure is too low (e.g., below 1.0 to 0.9 MPa), the second pressure relief component 13 will open frequently, affecting coffee preparation efficiency. Setting the preset pressure to above 2.0 MPa within the range of 1.2 to 2.0 MPa ensures stable operation of the water system under normal working pressure and allows for timely pressure relief in abnormal situations (such as pipe blockage). For example, when the preset pressure is 2.0 MPa, if the extraction nozzle 24 of the extraction device 23 is blocked by coffee grounds, the pressure in the water inlet 1 may rise rapidly to above 3.0 MPa. At this time, the mechanical pressure relief valve 131 will automatically open to release the pressure to below 2.0 MPa, thereby protecting the pipeline from high pressure damage.

[0085] In some embodiments, the mechanical pressure relief valve 131 is provided with a check valve. Exemplarily, the check valve is implemented by a built-in one-way valve plate that only allows water to flow from the inlet to the outlet, and automatically closes when the pressure at the outlet is higher than that at the inlet to prevent backflow. In particular, when the coffee machine is making hot coffee, after the hot brewing is finished, it can prevent the hot water in the pressurized instant heating module 5 (mentioned below) from flowing back and causing the extraction pump 122 to fail due to heat, thereby extending the service life of the extraction pump 122.

[0086] In some embodiments, the second pressure relief port also has an air venting function during the initial startup of the extraction water pump 122. When the water inlet 1 is filled with water for the first time or restarted after a long period of shutdown, or when the pure water tank 3 is abnormally short of water, causing the extraction water pump 122 to run dry, air may accumulate in the pipes, resulting in the extraction water pump 122 not pumping water or having insufficient flow. At this time, the air carried by the water flow is discharged through the second pressure relief port until the pipes are filled with liquid. In this way, the startup time of the extraction water pump 122 is shortened, allowing the coffee machine to enter the working state more quickly. The mechanical pressure relief valve 131 of this embodiment can integrate the check valve and the air venting function into the same pressure relief valve, which simplifies the water system structure and achieves multiple safety guarantees and performance optimization.

[0087] Please see Figure 1In some embodiments, the coffee purification system also includes a pure water tank 3. The pure water tank 3 is a pure water storage component of the coffee purification system, directly connected to the water inlet of the water inlet channel 1, supplying water to the water inlet pipe 11 to ensure the water supply needs of the coffee preparation process. In this embodiment, pure water is used to prepare the coffee, improving the taste and purity of the coffee.

[0088] In some embodiments, the pure water tank 3 is also connected to the second pressure relief port, and the water flow after being depressurized by the second pressure relief component 13 flows back to the pure water tank 3 from the second pressure relief port. When the pipeline downstream of the water pump 12 exceeds the preset pressure, the mechanical pressure relief valve 131 opens the second pressure relief port to release pressure, and the depressurized water flow can flow directly back to the pure water tank 3, realizing the reuse of water resources, which not only saves water resources, but also reduces the operation of frequent water filling and improves the convenience of use. At the same time, the backflow design also makes the pressure relief process more stable and controllable, and the water flow does not need to be discharged to the outside of the coffee machine through an additional drainage channel, which improves the compactness of the internal structure of the coffee purifier.

[0089] In some embodiments, the pure water tank 3 has a return port, and the second pressure relief component 13 further includes a second pressure relief pipe 132. The second pressure relief pipe 132 connects the second pressure relief port and the return port. The water flow after being depressurized by the second pressure relief component 13 flows back to the pure water tank 3 from the second pressure relief port through the second pressure relief pipe 132 and the return port. The return port in this embodiment has two configuration methods.

[0090] Please see Figure 4 In one configuration, the return port level is higher than the maximum water level of the pure water tank 3. When the return port level is higher than the maximum water level of the pure water tank 3, due to the higher position of the return port, when the second pressure relief port opens to release pressure, the water flows through the second pressure relief pipe 132 to the return port and eventually returns to the pure water tank 3. Thus, during the water return process, even if the pure water tank 3 is full, it ensures that the water will not flow back from the pure water tank 3 to the second pressure relief port, avoiding damage to the mechanical pressure relief valve 131, thereby ensuring the reliability and stability of the pressure relief system.

[0091] Please see Figure 6In another configuration, the return port level is lower than the maximum water level in the pure water tank 3. In this case, the second pressure relief component 13 also includes a check valve 133, which can be either a mechanical check valve or a solenoid valve. The check valve 133 is located on the second pressure relief pipe 132. When the inlet water circuit 1 is depressurized, the water flows through the second pressure relief port and the second pressure relief pipe 132 to the return port, smoothly returning to the pure water tank 3. However, when the water level in the pure water tank 3 rises to the return port level, without the check valve 133, the water in the pure water tank 3 may flow backwards through the second pressure relief pipe 132 into the second pressure relief port under pressure, thus interfering with the normal pressure control of the inlet water circuit 1 and potentially damaging the mechanical pressure relief valve 131. The check valve 133 in this embodiment prevents water from flowing back from the return port to the second pressure relief port, further improving the safety and stability of the coffee purification system.

[0092] In some embodiments, during the extraction process of the coffee machine, the extraction water pump 122 may generate significant noise due to the high pumping pressure. To reduce the noise generated by the water system and improve the user experience, this application also provides a buffer noise reduction component 16.

[0093] Specifically, such as Figure 7 As shown, the water inlet path 1 also includes a buffer noise reduction component 16 installed on the water inlet pipe 11. Along the water flow direction of the water inlet pipe 11, the buffer noise reduction component 16 is located downstream of the extraction water pump 122. The buffer noise reduction component 16 is used to buffer the water flow passing through the buffer noise reduction component 16.

[0094] In the first configuration, 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 has a buffer cavity communicating with the water inlet pipe 11. The elastic diaphragm is disposed in the buffer cavity to buffer the liquid flowing through the buffer noise reduction device 16.

[0095] The elastic diaphragm can be a silicone sheet or a rubber sheet. It buffers the water flow by absorbing energy through elastic deformation. When the water pressure changes abruptly (such as the water hammer effect caused by the start-stop of the extraction pump 122), 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.

[0096] In the second configuration, the buffer noise reduction component 16 has a buffer flow channel connected to the water inlet pipe 11, and the buffer flow channel is arranged in a spiral shape.

[0097] 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.

[0098] In the third configuration, 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.

[0099] This embodiment designs a buffer pipe section with varying 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.

[0100] In the fourth configuration, the outer surface of the extraction water pump 122 and / or the buffer noise reduction component 16 is provided with an elastic layer.

[0101] The elastic layer can be a damping sheet, which reduces noise propagation through damping and vibration reduction. When the extraction pump 122 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.

[0102] In some embodiments, the buffer noise reduction element 16 is located in the water inlet channel 1 between the extraction water pump 122 and the second pressure relief element 13.

[0103] The noise reduction buffer 16 and the second pressure relief component 13 work together to form a modular structure for noise suppression and pressure control. When the high-pressure water flow output by the extraction water pump 122 enters the noise reduction buffer 16, the pressure fluctuations of the water flow are first buffered by the noise reduction buffer 16, and then the water flows through the second pressure relief component 13 for pressure regulation. In this way, frequent impacts of pressure changes on the second pressure relief component 13 are effectively avoided, extending the service life of the second pressure relief component 13.

[0104] Regarding the connection method, the connection between the buffer noise reduction component 16 and the extraction water pump 122 and the second pressure relief component 13 (mechanical pressure relief valve 131) can be selected according to the interface form, such as internal and external thread connection, Teflon assembly, and combination connection of snap ring and sealing ring. The connection between the buffer noise reduction component 16 and the second pressure relief component 13 can also adopt a quick-connect structure to achieve quick disassembly and facilitate maintenance.

[0105] Please see Figure 1 In some embodiments, the coffee purification system also includes a pure water production line, the outlet of which is connected to the pure water tank 3 to provide pure water to the pure water tank 3.

[0106] For example, the pure water production circuit includes a filtration assembly 8, which has multi-stage filtration functions. For instance, the first-stage filtration assembly 81 uses a composite filter element, which may include PP cotton filter elements, activated carbon filter elements, PAC filter elements (a pre-filter element with a composite structure of polypropylene cotton + carbon fiber + non-woven fabric), etc. The second-stage filtration assembly 82 uses an RO (reverse osmosis) filter element, and the third-stage filtration assembly uses an activated carbon filter element or a mineral filter element. The first-stage filtration assembly 81, as a pre-filtration stage, can aggregate suspended particles, colloids, and other impurities in tap water into larger flocs, facilitating subsequent filtration removal. The first-stage filtration assembly 81 can effectively intercept large particles such as sediment and rust in the water, reducing the burden on subsequent RO filtration and extending the service life of the RO membrane.

[0107] The second-stage filtration component 82, specifically the 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, as well as the water quality requirements for coffee extraction, further enhancing the coffee's flavor. It also reduces the risk of scaling in the downstream drinking water pipeline (the pipeline after the purified water tank 3), extending the product's lifespan.

[0108] 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.

[0109] Of course, in some other embodiments, the filter component 8 may include only the first-stage filter component 81 and the second-stage filter component 82.

[0110] Please see Figure 5 In some embodiments, the water receiving device 4 of the coffee purification system replaces the pure water tank 3 as the water storage container for the pure water production circuit. The water receiving device 4 has an inlet end, an outlet end, and a receiving end. The inlet end of the water receiving device 4 is connected to the pure water production circuit, and the outlet end of the water receiving device 4 is connected to the inlet end of the inlet pipe 11. The receiving end of the water receiving device 4 is connected to the second pressure relief component 13 and the first pressure relief component 22, respectively. The water flow after depressurization by the first pressure relief component 22 and the first pressure relief component 22 flows back to the water receiving device 4, realizing the reuse of water resources and saving water resources.

[0111] Please continue reading. Figure 5 In some embodiments, the coffee purification system also includes a water tank 7, which includes a concentrate tank and a raw water tank. The raw water tank and the concentrate tank are separated by a partition in one water tank. The raw water tank is used to hold unpurified raw water, and the concentrate tank is used to hold water containing a high concentration of impurities generated during the filtration process, so that the pure water is not affected by this part of the water, thus ensuring the quality of the pure water.

[0112] The outlet of the raw water tank is connected to the inlet of the filter assembly 8 to filter the water in the raw water tank 3, thereby removing impurities and obtaining pure water. Furthermore, in this embodiment, the water tank 7 is divided into a raw water tank and a concentrated water tank by a partition. This prevents concentrated water in the concentrated water tank from flowing into the raw water tank, ensuring the normal operation of the filter assembly 8 and extending its service life. It should be noted that this embodiment does not specifically limit the volume of the water tank 7; it can be set according to the actual application scenario.

[0113] The second-stage filter element 82 is also connected to the concentrate tank. In this way, boiling water containing impurities that the second-stage filter element fails to filter can flow into the concentrate tank to avoid affecting the subsequent filtration of the post-filter section.

[0114] Please continue reading. Figure 5 In some embodiments, the coffee purification system further 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 may be a water level sensing needle or a mechanical float.

[0115] 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 in the tank. 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 coffee brewing, 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 purification circuit. The high water level detector 32 is located 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 purification circuit, stopping water production and adding water to the pure water tank 3. Therefore, the above dual water level detection mechanism not only ensures the safety of the coffee machine's operation but also avoids water waste by detecting the water level, improving the reliability of the coffee purifier and the user experience.

[0116] Please see Figures 3-4 In some embodiments, the coffee purification system also includes a water outlet path 6.

[0117] In the coffee purification system, the water outlet 6 is connected to the pressurized instant heating module 5. The water outlet 6 and the extraction water channel 2 are controlled by the system to selectively connect to the pressurized instant heating module 5, enabling the coffee purifier of this application to have multiple beverage preparation functions. When the user needs hot water, the system controls the pressurized instant heating module 5 to work and connect it to the water outlet 6, directly outputting hot water. When the user needs to brew hot coffee, the system controls the pressurized instant heating module 5 to work and connect it to the extraction water channel 2, and the hot water enters the extraction device 23 along the extraction water channel 2 for coffee extraction. In the room temperature extraction scenario, the system controls the pressurized instant heating module 5 to stop working, and the water flowing through the pressurized instant heating module 5 is not heated and directly enters the extraction device 23, using room temperature water to soak the coffee powder to achieve room temperature coffee brewing.

[0118] In this embodiment, by switching between the water outlet path 6 and the extraction water path 2 and controlling the system, multiple functions such as hot water supply, hot coffee extraction, and room temperature coffee extraction are achieved on the same coffee machine, thereby enhancing the multifunctionality of the coffee machine.

[0119] Please see Figure 1 In some embodiments, the water outlet path 6 includes an outlet pipe 61 connected to the pressurized instant heating module 5 and an outlet valve 62 installed on the outlet pipe 61. Different functions can be switched by selectively connecting the coffee valve and the outlet valve 62. When the user needs hot water, the system controls the outlet valve 62 to connect to the pressurized instant heating module 5. The water 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 spout 63 of the outlet pipe 61. When preparing coffee, the system controls the coffee valve to connect, the extraction water pump 122 pressurizes the water and sends it to the pressurized instant heating module 5, and then the water enters the extraction device 23 through the connected coffee valve to complete the coffee making process. It should be noted that the coffee valve here can be understood as the second coffee valve 221 mentioned above.

[0120] The switching and coordination mechanism between the water outlet valve 62 and the coffee valve ensures that the hot water supply and coffee extraction functions are 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.

[0121] In some embodiments, such as Figure 8 As shown, the water inlet circuit 1 also includes a check valve 14, which is installed on the first water inlet pipe 111 and located between the water supply pump 121 and the pressurized instant heating module 5.

[0122] The check valve 14 is used to prevent water from flowing back from the pressurized instant heating module 5 to 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 generates 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, thus preventing hot water leakage that could damage the equipment or cause safety hazards. Simultaneously, the check valve 14 also isolates the water supply pump 121 from the high-pressure environment, preventing damage to components caused by reverse high-pressure impacts, effectively extending the service life of the pump 12, and ensuring the stable operation of the hot water supply function.

[0123] In some embodiments, the check valve 14 includes either a mechanical check valve or a solenoid valve. A mechanical check valve relies on the fluid's own pressure to control the valve's opening and closing; it is simple in structure, highly reliable, requires no additional power supply, and is low in cost. A solenoid valve, on the other hand, controls the valve's opening and closing through electromagnetic force, offering advantages such as fast response and precise control. In a coffee purification system, the type of check valve 14 can be selected based on actual needs and cost considerations to meet different functional requirements.

[0124] In some embodiments, coffee grounds can be pre-infused to enhance the flavor of the extracted coffee. That is, the coffee purification system has a pre-infusion mode, which wets the coffee grounds with low-pressure water before the actual extraction, causing the coffee grounds to expand evenly and release carbon dioxide, thereby improving the uniformity of the subsequent extraction. Pre-infusion modes can include room temperature pre-infusion and hot pre-infusion modes.

[0125] In some embodiments, the water inlet path 1 further includes a pressure sensor, which is disposed on the second water inlet pipe 112 and located between the extraction water pump 122 and the pressurized instant heating module 5. For example, the pressure sensor can be disposed at the first outlet of the coffee valve 221, so that the pressure sensor can simultaneously monitor the real-time extraction pressure of hot extraction or room temperature extraction. In this way, the system can further adjust algorithms such as the time and pressure distribution of coffee powder pre-soaking, the preset extraction pressure value, and the preset descaling cycle based on the monitored extraction pressure. Of course, in other embodiments, when the system does not have a flow meter 15 and a pressure sensor, an experimental big data model can be implanted into the system's control module to monitor the system's output water volume and pressure.

[0126] Please see Figure 3In some embodiments, the water inlet path 1 further includes a pure water tank 3 and a flow meter 15. Specifically, the first water inlet pipe 111 and the second water inlet pipe 112 are respectively connected to the pure water tank, and the flow meter 15 is installed on the second water inlet pipe 112; in this case, the flow meter 15 is installed on the second water inlet pipe 112 to monitor the water consumption during the coffee extraction process independently. During the coffee extraction process, the water consumption is very important to the taste and quality of the coffee. By monitoring and controlling the water consumption in real time through the flow meter 15, it can be ensured that the best results are achieved in each extraction.

[0127] Please see Figure 4 In some embodiments, the water inlet pipe 11 also includes a common water inlet pipe 113, and the coffee purification system also includes a pure water tank 3 and a flow meter 15. The pure water tank 3 is connected to the inlet end of the common water inlet pipe 113, and the outlet end of the common water inlet pipe 113 is connected to the first water inlet pipe 111 and the second water inlet pipe 112. The flow meter 15 is installed on the common water inlet pipe 113, and in this case, the flow meter 15 is used to monitor the amount of water used for coffee extraction or the amount of water output for hot water. The system can obtain data on the amount of water used for coffee extraction, the amount of water output for hot water, and the total amount of water used through the flow meter 15, which facilitates precise control and management of water used for different functions.

[0128] Please see Figure 3 as well as Figure 9 In some embodiments, the water outlet path 6 further includes a reversing valve 64, which is disposed on the water outlet pipe 61 and is located downstream of the water outlet valve 62 along the water flow direction of the water outlet pipe 61. The reversing valve 64 has a second inlet, a second outlet, and a third outlet. The second inlet is connected to the water outlet valve 62. The coffee purification system also includes a return pipe 65 and a water outlet 63. The return pipe 65 is connected to the second outlet, and the third outlet is connected to the water outlet 63. The second inlet is connected to either the second outlet or the third outlet.

[0129] Understandably, the reversing valve 64 can be an electric three-way valve, which, when the second inlet and the second outlet are connected, closes the second inlet and the third outlet to achieve backflow sterilization of the residual water at the end of the pressurized instant heating module 5; or, when the second inlet and the third outlet are connected, close the second inlet and the second outlet to achieve hot water or room temperature water flowing out of the outlet 63.

[0130] For example, taking the second inlet and the second outlet as connected and the second inlet and the third outlet as closed, in order to ensure stable water temperature during extraction, the pipeline needs to be preheated. Therefore, when the system executes the preheating mode, after the pipeline preheating is completed, there is residual preheated water at the end of the pressurized instant heating module 5 and on the pipeline. This residual water can be returned to the pure water tank 3 through the return pipe 65 to increase the cleanliness of drinking water and coffee extraction water, and to ensure stable temperature required for coffee extraction. At the same time, it can also reduce the amount of preheated water discharged directly through the extraction water circuit 2. Specifically, when the system executes the preheating mode, the outlet valve 62 is opened, and the water supply pump 121 works to discharge the residual water at the end of the pressurized instant heating module 5 into the pure water tank 3.

[0131] After completing the preheating process described above, the system can supply hot water or hot coffee according to user needs. When the system dispenses hot water, the outlet valve 62 opens, and the second inlet and third outlet of the reversing valve 64 open to allow hot water to flow to the outlet 63. When the system prepares hot coffee, the outlet valve 62 closes, and the reversing valve 64 closes entirely.

[0132] It should be noted that after the first water inlet pipe 111 is preheated, the pressure inside the first water inlet pipe 111 must be released to 0 before the water outlet valve 62 can be closed, in order to prevent the water supply pump 121 from detaching due to excessive residual pressure in the first water inlet pipe 111.

[0133] 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.

[0134] 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 purification system, characterized in that, The coffee purification system is applied to coffee purifiers and includes: The water inlet system includes an inlet pipe and a water pump installed on the inlet pipe; The pressurized instant heating module is connected to the water pump through the water inlet pipe and is used to heat the water flowing into the pressurized instant heating module instantly during operation. The extraction water circuit includes an extraction tube, the inlet end of which is connected to the pressurized instant heating module; A room-temperature extraction water circuit includes a room-temperature extraction tube, the inlet of which is connected to the water pump; and, The extraction device is connected to the extraction water circuit or to the room temperature extraction water circuit.

2. 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 installed on the first water inlet pipe and an extraction water pump installed on the second water inlet pipe. The water pressure of the extraction water pump is greater than that of the water supply pump. The ambient temperature extraction tube is connected to the outlet of the extraction water pump and the extraction device.

3. The coffee purification system as described in claim 2, characterized in that, The ambient temperature extraction water circuit also includes: The first coffee valve is installed on the ambient temperature extraction tube and is located between the extraction water pump and the extraction device.

4. The coffee purification system as described in claim 3, characterized in that, The extraction water path also includes: A second coffee valve is disposed on the extraction tube and located between the pressurized instant heating module and the extraction device; and, The third coffee valve is disposed on the extraction tube and located between the second coffee valve and the extraction device; When the second coffee valve and the third coffee valve are connected to the extraction device, the first coffee valve is in the closed state; When the first coffee valve is connected to the extraction device, the second coffee valve and the third coffee valve are in the closed state.

5. The coffee purification system as described in claim 4, characterized in that, The second coffee valve is a first pressure relief component, which has a first water inlet, a first water outlet and a first pressure relief port. The first water inlet is connected to the pressurized instant heating module and the first water outlet is connected to the extraction device. When the second coffee valve is in the open state, the first inlet is connected to the first outlet but not to the first pressure relief port; When the second coffee valve is closed, the first pressure relief port is connected to the first water outlet, but not to the first water inlet, in order to relieve pressure on the extraction device.

6. The coffee purification system as described in claim 5, characterized in that, The coffee purification system also includes: Water receiving device; and, A first pressure relief pipe is connected to the water receiving device and the first pressure relief port, so that the fluid flowing out of the first pressure relief port is collected in the water receiving device through the first pressure relief pipe.

7. The coffee purification system as described in claim 2, characterized in that, The water inlet channel also includes: The second pressure relief component is located downstream of the extraction water pump along the water flow direction of the inlet pipe. The second pressure relief component is used to relieve pressure on the pipeline downstream of the extraction water pump. The inlet end of the ambient temperature extraction tube is connected to the outlet end of the second pressure relief component.

8. The coffee purification system as described in claim 7, characterized in that, The second pressure relief component includes: The mechanical pressure relief valve has both its inlet and outlet ends connected to the inlet pipe, and its outlet end is also connected to the ambient temperature extraction pipe. The mechanical pressure relief valve has a second pressure relief port. When the pipeline pressure between the extraction water pump and the extraction device is greater than the preset pressure, the mechanical pressure relief valve opens the second pressure relief port to release pressure.

9. The coffee purification system as described in claim 8, characterized in that, The mechanical pressure relief valve is equipped with a check valve, which prevents water from flowing backward from the outlet to the inlet; and / or, The second pressure relief port is also used to discharge air from the water inlet path when the extraction water pump is pumping water.

10. The coffee purification system as described in claim 2, characterized in that, The coffee purification system also includes: A pure water tank is connected to both the first water inlet pipe and the second water inlet pipe; and, A flow meter is installed on the second inlet pipe.

11. The coffee purification system as described in claim 2, characterized in that, The water inlet pipe also includes a shared water inlet pipe, and the coffee purification system also includes: A pure water tank is connected to the inlet end of the shared inlet pipe, and the outlet end of the shared inlet pipe is connected to both the first and second inlet pipes; and, A flow meter is installed on the shared inlet pipe.

12. The coffee purification system as described in claim 2, characterized in that, The water inlet channel also includes: A pressure sensor is installed on the second water inlet pipe and located between the extraction water pump and the pressurized instant heating module.

13. The coffee purification system as described in claim 2, characterized in that, The water inlet channel 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.

14. The coffee purification system as described in claim 13, characterized in that, The check valve includes either a mechanical check valve or a solenoid valve.

15. The coffee purification system as described in claim 2, characterized in that, The coffee purification system also includes: The water outlet path is connected to the pressurized instant heating module, and either the water outlet path or the extraction water path is connected to the pressurized instant heating module. The water supply pump outputs water through the pressurized instant heating module and the water outlet circuit.

16. The coffee purification system as described in claim 15, 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; 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.

17. The coffee purification system as described in claim 16, characterized in that, The water outlet path also includes: A reversing valve is installed on the outlet pipe and along the water flow direction of the outlet pipe. The reversing valve is located downstream of the outlet valve and has a second inlet, a second outlet and a third outlet. The second inlet is connected to the outlet valve. The coffee purification system also includes a return pipe and a water outlet. The return pipe is connected to the second water outlet, and the third water outlet is connected to the water outlet. The second inlet is connected to either the second outlet or the third outlet.

18. The coffee purification system according to any one of claims 1-17, characterized in that, The coffee purification system also includes: Pure water system; and, 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 pipe.

19. The coffee purification system as described in claim 18, 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.

20. 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 1-19 is installed within the mounting cavity.

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