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, an extraction waterway and a water receiving device, the water inlet waterway comprises a water inlet pipe and a water pump arranged on the water inlet pipe, and the extraction waterway comprises an extraction pipe; the pressure relief piece and the extraction device are sequentially arranged on the extraction pipe in the water flow direction of the extraction pipe, the extraction pipe communicates with the water inlet pipe, the water pump is used for preparing coffee in cooperation with the extraction waterway, and the water receiving device is connected with the pressure relief piece. The pressure relief piece is arranged at the water inlet end of the extraction device, so that the pipeline breakage risk of the coffee purifying and drinking machine is reduced, and the use safety of the coffee purifying and drinking system is improved.

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] In related technologies, coffee machines typically use a water pump as a power source to achieve the coffee extraction function.

[0003] However, during the extraction process, the continuous pressurization by the water pump creates significant pressure within the pipeline, posing a risk of pipeline rupture and potentially causing safety hazards. Summary of the Invention

[0004] This application provides a coffee purification system and a coffee purifier, aiming to reduce the risk of pipe rupture in the coffee purifier and improve the safety of using the coffee purification system.

[0005] The first aspect of this application provides a coffee purification system applied to a coffee purifier. The system includes a water inlet path, an extraction path, and a water receiving device. The water inlet path includes an inlet pipe and a water pump mounted on the inlet pipe. The extraction path includes an extraction pipe, with a pressure relief component and an extraction device sequentially arranged along the water flow direction of the extraction pipe. The extraction pipe is connected to the water inlet pipe. The water pump is used to cooperate with the extraction path to prepare coffee. The pressure relief component is used to relieve pressure in the extraction path. The water receiving device is connected to the pressure relief component and is used to collect the fluid generated by the pressure relief component.

[0006] In some embodiments, the pressure relief component includes a coffee valve disposed on the extraction tube. The coffee valve has a first inlet, a first outlet, and a pressure relief port. The first inlet is connected to the inlet pipe, and the first outlet is connected to the extraction device. When the coffee valve is in the open state, the first inlet is connected to the first outlet but not to the pressure relief port. When the coffee valve is in the closed state, the pressure relief port is connected to the first outlet but not to the first inlet, for the purpose of relieving pressure on the extraction device.

[0007] In some embodiments, the pressure relief component further includes a pressure relief pipe that connects the pressure relief port and the water receiving device.

[0008] In some embodiments, the pressure relief pipe is a heat-resistant flexible hose; and / or, The pressure relief pipe can withstand water temperatures no lower than 100℃.

[0009] In some embodiments, the coffee purification system further includes a pressurized instant heating module. The inlet of the pressurized instant heating module is connected to the water pump through the inlet pipe, and the outlet is connected to the extraction pipe. During operation, it is used to heat the water flowing into the pressurized instant heating module instantly, and the water pressure that the pressurized instant heating module can withstand is not less than the water pressure when the extraction water circuit extracts coffee.

[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 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.

[0012] In some embodiments, the coffee purification system further includes a water outlet path connected to the pressurized instant heating module, and the water outlet path and the extraction water path are optionally connected to the pressurized instant heating module.

[0013] 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 installed on the first water inlet pipe and an extraction water pump respectively installed on the second water inlet pipe, wherein the pumping water pressure of the extraction water pump is greater than the pumping water pressure of the supply water pump; 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.

[0014] In some embodiments, the water inlet circuit 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.

[0015] In some embodiments, the check valve includes one of a mechanical check valve and a solenoid valve.

[0016] In some embodiments, the coffee purification system further includes a pure water tank and a flow meter, with the first water inlet pipe and the second water inlet pipe respectively connected to the pure water tank; the flow meter is disposed on the second water inlet pipe.

[0017] 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 and a flow meter. The pure water tank is connected to the inlet end of the common water inlet pipe, and the outlet end of the common water inlet pipe is connected to the first water inlet pipe and the second water inlet pipe. The flow meter is installed on the common water inlet pipe.

[0018] In some embodiments, the water inlet circuit further includes a pressure sensor, which is disposed on the second water inlet pipe and located between the extraction water pump and the pressurized instant heating module.

[0019] 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; 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.

[0020] In some embodiments, the water outlet path further includes a reversing valve, which is disposed on the water outlet pipe and along the water flow direction of the water outlet pipe. The reversing valve is located downstream of the water outlet valve and has a second inlet, a second outlet, and a third outlet. The second inlet is connected to the water outlet valve. The coffee purification system further includes a return pipe and a spout. The return pipe is connected to the second outlet, and the third outlet is connected to the spout. 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, A pure water tank, with its inlet connected to the pure water production circuit and its outlet connected to the inlet of the inlet pipe; or, The coffee purification system also includes a pure water production line. The water receiving device has an inlet end, an outlet end, and a receiving end. The inlet end of the water receiving device is connected to the pure water production line, the outlet end of the water receiving device is connected to the inlet end of the inlet pipe, and the receiving end of the water receiving device is connected to the pressure relief component.

[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 embodiments is installed within the mounting cavity.

[0024] This application provides a pressure relief component at the water inlet of the extraction device. After extraction is completed, the pressure relief component opens the interior of the extraction device, thereby reducing the internal pressure. This not only facilitates the maintenance and cleaning of the extraction device for users, but also protects the extraction device from damage caused by excessive pressure, thus improving the convenience and reliability of the coffee purifier. 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 a coffee purification system provided in the seventh embodiment of this application.

[0027] Reference numerals: 1. Inlet water path; 11. Inlet pipe; 111. First inlet pipe; 112. Second inlet pipe; 113. Common inlet pipe; 12. Water pump; 121. Supply water pump; 122. Extraction water pump; 14. Check valve; 15. Flow meter; 2. Extraction water path; 21. Extraction pipe; 22. Pressure relief device; 221. Coffee valve; 222. Pressure relief pipe; 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. Outlet water path; 61. Outlet pipe; 62. Outlet valve; 63. Outlet nozzle; 64. Reversing valve; 65. Return pipe; 7. Water tank; 8. Filter assembly; 81. First-stage filter assembly; 82. Second-stage filter assembly. 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 and extraction path 2.

[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] Please continue reading. Figures 1-3 The extraction water path 2 in this embodiment includes an extraction pipe 21, a pressure relief component 22 arranged sequentially along the water flow direction of the extraction pipe 21, and an extraction device 23.

[0037] 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.

[0038] 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.

[0039] This embodiment solves the aforementioned problem by installing a pressure relief component 22 at the water inlet of the extraction device 23. Specifically, the pressure relief component 22 is installed on the extraction pipe 21 to relieve pressure in the extraction water path 2, especially in the pipeline between the 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 is blocked, 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 port handle, or the port holder, and may even damage the extraction device 23. This embodiment relieves pressure through the pressure relief component 22. For example, the pressure relief component 22 includes an electric three-way valve. One of the ports of this three-way valve is a pressure relief port. When extraction is complete, the 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 pressure relief component 22 provided 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.

[0040] Please continue reading. Figures 1-3 The coffee purification system in this embodiment also includes a water receiving device 4, which is connected to a pressure relief component 22 and is used to collect fluids (such as water flow, gas, etc.) generated by the 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.

[0041] When the 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.

[0042] This application provides a pressure relief component 22 at the water inlet of the extraction device 23. After extraction is completed, the 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.

[0043] Please see Figure 1 In 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.

[0044] Please continue reading. 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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 first pressure relief component 13 and the pressure relief component 22 respectively. The water after being depressurized by the first pressure relief component 13 and the pressure relief component 22 flows back to the water receiving device 4, realizing the reuse of water resources and saving water resources.

[0050] Please continue reading. Figure 1 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.

[0051] 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.

[0052] 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.

[0053] Please continue reading. Figure 1 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.

[0054] 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.

[0055] In some embodiments, coffee extraction typically requires not only high water pressure but also high water temperature. For example, the extraction temperature for espresso is usually 88-96°C. 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.

[0056] In the coffee purification 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 the extraction pipe 21 to supply hot water to the extraction device 23. The pressurized instant heating module 5 of this embodiment adopts instant heating technology, which can heat the water to the preset temperature during the rapid flow of water, avoiding the problem of water quality degradation caused by repeated heating in traditional water storage heating.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] In some embodiments, the pressure relief component 22 includes a coffee valve 221, which may be an electric three-way valve. The coffee valve 221 has three interfaces: a first inlet, a first outlet, and a pressure relief port. The first 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 first outlet is connected to the extraction device 23 and delivers hot water to the extraction device 23.

[0066] The 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 pressure relief port is closed, not connected to other interfaces, ensuring a normal water supply. When the coffee valve 221 is closed, the valve core changes position, connecting the 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 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.

[0067] Regarding the connection method, the pressure relief port of the 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 coffee valve 221 can be connected to the plastic + rubber combination structure on the product body. 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.

[0068] Please see Figures 3-4 In some embodiments, the pressure relief component 22 further includes a pressure relief pipe 222.

[0069] In the coffee purification system of this embodiment, the water receiving device 4 and the 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 pressure relief component 22. The pressure relief pipe 222 connects the pressure relief port of the coffee valve 221 and the water receiving device 4, and is used to guide the pressure relief water flow to the water receiving device 4.

[0070] 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 pressure relief component 22 can ensure that the water flows smoothly 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.

[0071] In some embodiments, the 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 coffee valve 221, in terms of pressure resistance, the coffee valve 221 can withstand a water pressure of not less than 2.0 MPa, ensuring that the 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 and the pressure rises due to a brief blockage of the extraction device 23, the 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.

[0072] In terms of heat resistance, the 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 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 coffee valve 221 maintains optimal working condition during use, thereby guaranteeing the stability of the coffee purification system.

[0073] In some embodiments, the pressure relief pipe 222 is a heat-resistant hose. For example, the 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 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.

[0074] Please continue reading. Figures 3-4 In some embodiments, the coffee purification system also includes a water outlet path 6.

[0075] 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.

[0076] 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.

[0077] Please see Figure 1 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.

[0078] 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.

[0079] 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.

[0080] 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 to prepare coffee through the extraction water path 2. 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. In addition, the extraction water pump 122 and the first pressure relief component 13 are arranged sequentially along the water flow direction on the second inlet pipe 112. When the extraction water pump 122 causes the water pressure to be too high, the first pressure relief component 13 can be activated in time to relieve pressure, ensuring the safety of the water system and making the entire water supply and extraction process stable and reliable.

[0081] 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.

[0082] 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.

[0083] 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 installed on the water outlet pipe 61. Different functions can be switched by selectively connecting the coffee valve 221 and the water outlet valve 62. When the user needs hot water, the system controls the water outlet valve 62 to connect with 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 water outlet pipe 61. When making coffee, the system controls the coffee valve 221 to connect, and the extraction water pump 122 pressurizes the water and sends it into the pressurized instant heating module 5. The water then enters the extraction device 23 through the connected coffee valve 221 to complete the coffee making process.

[0084] 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.

[0085] In some embodiments, such as Figure 5 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] Please see Figure 4 In 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.

[0091] Please see Figure 2 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.

[0092] Please see Figures 6-7In 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.

[0093] 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.

[0094] 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.

[0095] 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 is completely closed.

[0096] 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 outlet valve 62 can be closed, in order to prevent the outlet hose of the water supply pump 121 from falling off due to excessive residual pressure in the first water inlet pipe 111.

[0097] 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.

[0098] 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; An extraction water path includes an extraction tube, a pressure relief component and an extraction device sequentially arranged along the water flow direction of the extraction tube, the extraction tube being connected to the water inlet pipe, a water pump used in conjunction with the extraction water path to prepare coffee, and the pressure relief component used to release pressure in the extraction water path; and... A water collection device, connected to the pressure relief component, is used to collect the fluid generated by the pressure relief component during pressure relief.

2. The coffee purification system as described in claim 1, characterized in that, The pressure relief component includes: A coffee valve is provided on the extraction tube. The coffee valve has a first water inlet, a first water outlet and a pressure relief port. The first water inlet is connected to the water inlet tube and the first water outlet is connected to the extraction device. When the coffee valve is in the open state, the first inlet is connected to the first outlet but not to the pressure relief port. When the coffee valve is closed, the 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.

3. The coffee purification system as described in claim 2, characterized in that, The pressure relief component also includes: A pressure relief pipe connects the pressure relief port and the water receiving device.

4. The coffee purification system as described in claim 3, characterized in that, The pressure relief pipe is a heat-resistant flexible hose; and / or, The pressure relief pipe can withstand water temperatures no lower than 100℃.

5. The coffee purification system as described in claim 2, characterized in that, The coffee purification system also includes: The pressurized instant heating module has an inlet end connected to the water pump via the inlet pipe and an outlet end connected to the extraction pipe. During operation, it is used to heat the water flowing into the pressurized instant heating module instantly, and the water pressure that the pressurized instant heating module can withstand is not less than the water pressure when the extraction water circuit extracts coffee.

6. The coffee purification system as described in claim 5, 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 5, 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.

8. The coffee purification system as described in claim 5, 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.

9. The coffee purification system as described in claim 8, 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 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.

10. The coffee purification system as described in claim 9, 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.

11. The coffee purification system as described in claim 10, characterized in that, The check valve includes either a mechanical check valve or a solenoid valve.

12. The coffee purification system as described in claim 9, characterized in that, The coffee purification system also includes: A pure water tank, wherein the first inlet pipe and the second inlet pipe are respectively connected to the pure water tank; and, A flow meter is installed on the second inlet pipe.

13. The coffee purification system as described in claim 9, 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.

14. The coffee purification system as described in claim 9, 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.

15. The coffee purification system as described in claim 9, 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.

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

17. The coffee purification system as described in claim 1, characterized in that, The coffee purification system also includes: Pure water system; and, A pure water tank, with its inlet connected to the pure water production circuit and its outlet connected to the inlet of the inlet pipe; or, The coffee purification system also includes a pure water production line. The water receiving device has an inlet end, an outlet end, and a receiving end. The inlet end of the water receiving device is connected to the pure water production line, the outlet end of the water receiving device is connected to the inlet end of the inlet pipe, and the receiving end of the water receiving device is connected to the pressure relief component.

18. The coffee purification system as described in claim 17, 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.

19. 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 1-18 is installed within the mounting cavity.

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