Coffee purifying and drinking equipment

Abstract

The invention provides coffee purifying and drinking equipment which comprises a hot water way and a cold water way at least partially independent of the hot water way, the cold water way comprises a water supply processing module, a low-temperature water preparation module and a backflow pipeline, and the water supply processing module comprises at least one filtering piece. Wherein one filtering piece comprises a shell as well as a front filtering structure and a rear filtering structure which are arranged in the shell, and the front filtering structure and the rear filtering structure have different water quality treatment functions; the low-temperature water preparation module is arranged on the downstream of the water supply treatment module in the water flow direction and comprises a cold water tank and a refrigeration assembly, and the cold water tank is provided with a cold water cavity communicating with the water outlet of the filtering part and at least used for storing cold water cooled by the refrigeration assembly; the backflow pipeline is communicated with the cold water cavity and the rear filtering structure and used for enabling cold water in the cold water cavity to flow back to the rear filtering structure, so that the cold water is at least treated by the rear filtering structure.

Description

Technical Field

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

[0002] Coffee purifiers are devices that combine water purification and coffee extraction functions, and cold brew coffee is increasingly favored by consumers due to its mild taste and low acidity and bitterness. Related technologies typically include a cold water chamber for storing cold water to continuously supply cold water for the cold brew process.

[0003] However, the water quality of cold water stored in the tank cannot be consistently guaranteed after a long period of stagnation. It is prone to secondary pollution and deterioration of taste, which affects the final quality of cold brew coffee and makes it difficult to meet users' core needs for the taste and hygiene of cold brew coffee. Summary of the Invention

[0004] This application provides a coffee purification device aimed at improving the quality of cold water in the cold water supply system of a coffee machine.

[0005] This application provides a coffee purification device, including a hot water circuit and a cold water circuit that is at least partially independent of the hot water circuit. The cold water circuit includes:

[0006] A water supply treatment module includes at least one filter element, wherein one of the filter elements includes a housing and a pre-filter structure and a post-filter structure both disposed within the housing, and the pre-filter structure and the post-filter structure have different water quality treatment functions. A low-temperature water preparation module is arranged downstream of the water supply treatment module along the water flow direction. The low-temperature water preparation module includes a cold water tank and a refrigeration assembly. The cold water tank has a cold water chamber connected to the outlet of the filter element, and is used at least to store cold water cooled by the refrigeration assembly. A return pipe is connected to the cold water chamber and the post-filter structure. The return pipe is used to return the cold water in the cold water chamber to the post-filter structure so that the cold water is treated by the post-filter structure at least once.

[0007] In some embodiments, the cold water path includes: A reflux pump is installed in the reflux pipeline. The inlet of the reflux pump is connected to the cold water chamber, and the outlet is connected to the post-filter structure.

[0008] In some of these embodiments, the reflux pump includes a micro centrifugal pump or a micro diaphragm pump.

[0009] In some embodiments, the cold water path includes: A check valve is installed in the return pipeline and arranged downstream of the return pump along the water flow direction. The check valve allows unidirectional flow from the cold water chamber to the post-filter structure.

[0010] In some embodiments, the cold water path includes: The first water quality sensor is installed on the conveying flow path between the outlet of the post-filter structure and the cold water tank, and is used to detect the water quality flowing through the conveying flow path.

[0011] In some of these embodiments, the first water quality sensor includes a total dissolved solids sensor.

[0012] In some embodiments, the cold water path includes: A cold water inlet valve is installed in the delivery path, located between the first water quality sensor and the cold water tank.

[0013] In some embodiments, the transport path includes: The diversion flow path is equipped with the first water quality sensor; A cold water branch, forming part of the cold water path, is connected to the outlet end of the branch flow path, and the cold water branch is equipped with the cold water inlet valve; and The hot water branch is part of the hot extraction water path and is connected to the outlet end of the branch flow path.

[0014] In some embodiments, the refrigeration assembly includes a connected compressor, a condenser, and an ice tray, the ice tray having a heat exchange channel for refrigerant flow and heat exchange with water, and the ice tray being connected to the cold water chamber.

[0015] In some embodiments, the low-temperature water preparation module includes: A water supply pipe is connected to the cold water chamber and extends from bottom to top. A circulating pump, installed on the water supply pipe, is used to transport water from the cold water chamber to the water supply pipe; and A diversion pipe is connected to and communicates with the upper end of the water supply pipe, located above the ice grid. The diversion pipe has multiple diversion ports, which are connected to the ice grid.

[0016] In some embodiments, the low-temperature water preparation module includes: An ice storage compartment is movably disposed within the cold water tank, having a storage location within the cold water tank and an ice-retrieving location exposed outside the cold water tank. The refrigeration component selectively cools the flowing water into ice water or freezes it into ice cubes by adjusting the operating frequency of the compressor. The cold water chamber is used to store the ice water, and the ice storage chamber is used to store the ice cubes.

[0017] In some embodiments, the low-temperature water preparation module includes: A water receiving component is arranged below the ice grid and has a water receiving groove, with a portion of the water receiving groove extending from top to bottom into the cold water cavity for receiving the cold water and guiding the cold water into the cold water cavity.

[0018] In some embodiments, a refrigerant branch pipe is provided between the compressor and the ice tray, and the refrigeration assembly further includes: A refrigerant valve is installed on the refrigerant branch pipe and is used to control the on / off state of the refrigerant branch pipe.

[0019] In some embodiments, the ice storage compartment has an upward-facing opening, the ice grid is located above the ice storage compartment and has multiple ice-making slots, the openings of the ice-making slots are arranged facing the side where the ice storage compartment is located, and the depth direction of the ice-making slots is set at an angle to the vertical direction so that the falling ice blocks fall into the ice storage compartment.

[0020] In some embodiments, the low-temperature water preparation module includes: A position sensor is disposed on the side of the cold water tank facing the ice storage compartment, and is used to generate a status signal indicating that the ice storage compartment is in place when the ice storage compartment is in the storage position.

[0021] In some embodiments, the low-temperature water preparation module further includes at least one component disposed within the cold water chamber: A water level detection device is used to detect the water level in the cold water chamber; A temperature sensor is used to detect the water temperature inside the cold water chamber; The sterilization module is used to sterilize the water in the cold water chamber.

[0022] In some embodiments, two filters are provided, the two filters comprising: The first filter element includes the housing, the pre-filter structure, and the post-filter structure; and The second filter element is arranged downstream of the pre-filter structure along the water flow direction, is connected to the pre-filter structure and the post-filter structure, and has a different water treatment function than the pre-filter structure.

[0023] In some embodiments, the pre-filter structure comprises at least wet-laid carbon fiber; and / or The post-filtration structure includes at least a carbon rod; and / or The second filter element includes at least a reverse osmosis membrane.

[0024] In some embodiments, the coffee purification device further includes: The raw water tank is located upstream of the water supply treatment module. The raw water tank has a raw water chamber for storing raw water and is connected to the pre-filter structure.

[0025] In some embodiments, the coffee purification device further includes: A self-priming pump is installed on the inlet pipe between the raw water tank and the first filter element. The inlet end of the self-priming pump is connected to the raw water chamber, and the outlet end of the self-priming pump is connected to the inlet of the pre-filter structure.

[0026] In some embodiments, the coffee purification device further includes: The second water quality sensor is installed on the water inlet pipe and located upstream of the self-priming pump along the water flow direction.

[0027] In some embodiments, the raw water tank further includes a concentrated water chamber isolated from the raw water chamber, and the coffee purification device further includes: The concentrate pipeline connects the second filter element and the concentrate chamber; and A concentrate outlet valve is installed on the concentrate pipeline and is used to open and close the discharge of concentrate into the concentrate chamber.

[0028] In some embodiments, the coffee purification device further includes: An overflow valve is installed on the concentrate pipeline and located downstream of the concentrate outlet valve. The overflow valve is used to open when the pressure in the concentrate pipeline exceeds a preset threshold, providing a pressure relief path for the concentrate.

[0029] In this embodiment, the return pipeline connects the cold water chamber and the post-filtration structure. The return pipeline returns the cold water from the cold water chamber to the post-filtration structure, ensuring that the cold water is treated at least once by the post-filtration structure. Through the return pipeline, the cold water, originally stagnant in the cold water chamber, is periodically or continuously guided to the post-filtration component for further filtration, effectively removing or inhibiting odors, microorganisms, and other factors affecting water quality that may develop due to prolonged stagnation. No additional terminal filtration device is needed after the cold water chamber; the post-filtration component in the upstream composite filter is used for circulation, achieving dynamic purification of the cold water throughout the system, thereby significantly improving the sustained freshness and taste of the stored cold water. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the 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.

[0031] Figure 1 This is a schematic diagram of the structure of a coffee purification device provided in one embodiment of this application; Figure 2 This is a schematic diagram of the flow path of a coffee purification device provided in one embodiment of this application; Figure 3 for Figure 1 A schematic diagram of the exploded structure shown; Figure 4 for Figure 3 A structural diagram of some of the structures shown (machine casing omitted); Figure 5 for Figure 1 A cross-sectional view of the structure shown along the front-to-back direction. Figure 6 for Figure 1 The diagram shows a cross-sectional view of the structure along the left-right direction.

[0032] Explanation of reference numerals in the attached figures: 100. Coffee purification equipment; 1. Housing; 10. Water supply module; 111. Filter element; 111A. First filter element; 111A1. Housing; 111A2. Pre-filter structure; 111A3. Post-filter structure; 111B. Second filter element; 20. Low-temperature water preparation module; 21. Cold water tank; 22. Refrigeration components; 21a. Cold water chamber; 221. Compressor; 222. Condenser; 223. Ice tray; 223a. Ice maker; 224. Refrigerant valve; 23. Water supply pipe; 24. Circulation system. Pump; 25. Diverter pipe; 25a. Diverter port; 26. Ice storage tank; 27. Water receiving fitting; 27a. Water receiving tank; 281. Water level detection device; 282. Temperature sensor; 283. Sterilization module; 30. Return pump; 40. Check valve; 50. First water quality sensor; 60. Cold water inlet valve; 70. Raw water tank; 70a. Raw water chamber; 70b. Concentrate chamber; 80. Self-priming pump; 90. Second water quality sensor; 91. Concentrate outlet valve; 92. Overflow valve; 93. Extraction module; 97. Pressurized instant heating component; 1A, Hot water circuit; 1A1, Branch circuit; 1A2, Hot water branch circuit; 2A, Cold water circuit; 2A1, Return circuit; 2A2, Cold water branch circuit; 3A, Refrigerant branch circuit; 4A, Concentrate circuit. Detailed Implementation

[0033] 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.

[0034] like Figure 1 As shown, the coffee purification device 100 is a comprehensive device that integrates water purification and coffee preparation functions. It can directly connect to tap water through a built-in water treatment module to purify the raw water, thereby eliminating the hassle of users frequently purchasing and replacing bottled water and reducing operating costs.

[0035] To meet the demand for cold beverage brewing, related technologies include a cold water chamber 21a for storing cold water to continuously supply cold water for the brewing process. However, the water quality of the cold water stored in the tank cannot be consistently maintained after prolonged standing, and secondary water pollution and a deterioration in taste can easily occur, affecting the final quality of cold brew coffee and failing to meet users' core requirements for the taste and hygiene of cold brew coffee.

[0036] Please see Figure 1 and Figure 2 To address the aforementioned issues, this embodiment provides a coffee purification device 100. The coffee purification device 100 includes a housing 1 and a hot water path 1A housed within the housing 1, as well as a cold water path 2A that is at least partially opposed to the hot water path 1A. In other words, the system simultaneously provides a hot water path 1A and a cold water path 2A, which can be used to prepare hot drinks and cold drinks, respectively. The two do not completely share the same flow path. Since the cold water path 2A is at least partially independent of the hot water path 1A, it can effectively prevent the high-temperature water in the hot water path 1A from transferring heat through shared pipes and components, thus avoiding thermal interference to the cold water in the cold water path 2A. This reduces the heat exchange between the cold water and the hot environment in the cold water path 2A, providing a basis for maintaining the cold water at a low temperature.

[0037] Moreover, in this embodiment, the independent setting mode can realize the independent operation of cold water and hot water functions. When only the cold water function or the cold water direct drinking function is needed, the cold water circuit 2A can be started separately without starting the relevant heating components of the hot water circuit 1A, which reduces the energy consumption of the equipment, reduces the mutual interference between the two water circuits, improves the stability and reliability of the system operation, and avoids the water temperature fluctuation of the cold water circuit 2A caused by the operation of the hot water circuit 1A.

[0038] The cold water circuit 2A includes a water supply treatment module 10, a low-temperature water preparation module 20, and a return pipeline 2A1. The water treatment module can treat the raw water entering both the cold water circuit 2A and the hot water circuit 1A uniformly, eliminating the need for separate water treatment equipment for each circuit and reducing the structural complexity and production cost of the coffee purification device 100. The water supply treatment module 10 ensures that the water flowing into the cold water chamber 21a meets the water quality requirements for drinking and preparation, providing a high-quality water source for subsequent cooling, heating, and extraction processes.

[0039] The water treatment module 10 includes at least one filter element 111, and multiple filter elements 111 can be provided to achieve multi-stage filtration. One filter element 111 includes a housing 111A1 and a pre-filter structure 111A2 and a post-filter structure 111A3 (e.g., ...) both disposed within the housing 111A1. Figure 5 As shown, housing 111A1 provides an installation carrier for pre-filter structure 111A2 and post-filter structure 111A3. The pre-filter structure 111A2 and post-filter structure 111A3 have different water treatment functions, reducing the space occupied by water supply treatment module 10 and reducing equipment production costs and assembly difficulty.

[0040] The low-temperature water preparation module 20 is arranged downstream of the water supply treatment module 10 along the water flow direction. The low-temperature water preparation module 20 includes a cold water tank 21 and a refrigeration component 22. The cold water tank 21 has a cold water chamber 21a that is connected to the outlet of the filter element 111 and is used to store water cooled by the refrigeration component 22. Low-temperature water is prepared directly through the refrigeration component 22 without relying on external cold water input or ice storage tank, which greatly shortens the low-temperature water preparation time and improves refrigeration efficiency. That is, the coffee purification device 100 integrates the refrigeration component 22 and can actively prepare low-temperature water instead of relying on external ice source, which improves the autonomy and convenience of cold drink making.

[0041] The cold water chamber 21a can store low-temperature water, ensuring a continuous and stable supply of low-temperature water and preventing the extraction effect from being affected by insufficient water supply or water temperature fluctuations during the cold extraction process. Furthermore, since the outlet of the filter element 111 is connected to the cold water chamber 21a, pure water can be added to the cold water tank 21 when needed, maintaining the water level balance of the cold water tank 21 and ensuring continuous cooling capacity.

[0042] The return pipe 2A1 connects the cold water chamber 21a and the post-filter structure 111A3. The return pipe 2A1 is used to return the cold water in the cold water chamber 21a to the post-filter structure 111A3, ensuring that the cold water is treated at least once by the post-filter structure 111A3. Through the return pipe 2A1, the cold water that was originally stagnant in the cold water chamber 21a is periodically or continuously guided to the post-filter assembly for further filtration. This effectively removes or inhibits odors, microorganisms, and other factors that affect water quality caused by prolonged stagnation. No additional terminal filtration device is needed after the cold water chamber 21a; the post-filter assembly in the upstream composite filter element 111 is used for circulation, achieving dynamic purification of the cold water throughout the system, thereby significantly improving the continuous freshness and taste of the stored cold water.

[0043] Since the hot water circuit 1A and the cold water circuit 2A share the same water supply treatment module 10, in this embodiment, the water flow after being treated by the post-filter structure 111A3 may be distributed to the hot water circuit 1A or the cold water circuit 2A.

[0044] like Figure 2 As shown, in some embodiments, the cold water circuit 2A includes a return pump 30, which is an actively driven component. The return pump 30 is located in the return pipe 2A1 and provides a power source for the cold water that needs to be returned to the cold water chamber 21a, allowing the stagnant cold water to overcome pipe resistance and flow into the return pipe 2A1. The inlet of the return pump 30 is connected to the cold water chamber 21a, and the outlet is connected to the post-filter structure 111A3. By connecting the outlet to the post-filter structure 111A3, the post-filter, which originally only processed the initial inlet water, is reused as a circulating treatment unit for stored cold water. This continuously removes odor substances or microbial metabolites that grow during storage, improving the taste stability and water quality safety of the cold water throughout its entire lifecycle from storage to use.

[0045] In some embodiments, the reflux pump 30 includes a micro centrifugal pump or a micro diaphragm pump. The micro centrifugal pump relies on the centrifugal force generated by the rotation of the impeller to transport liquid. It has a simple structure, stable operation, and continuous and uniform flow output. It can provide a relatively gentle flow during circulation, avoiding damage to the filter media of the post-filter structure 111A3 due to excessive water flow impact, which is conducive to maintaining the long-term effectiveness of the filter media.

[0046] The miniature diaphragm pump relies on the reciprocating motion of the diaphragm to change the volume of the cavity to transport liquid. The closed cavity structure of the diaphragm pump ensures that water only comes into contact with the diaphragm and the cavity, avoiding the leakage risk that may be caused by the rotating shaft seal, which is conducive to maintaining the long-term sealing and hygiene of the cold water circuit 2A.

[0047] like Figure 2As shown, in some embodiments, the cold water circuit 2A includes a check valve 40. Understandably, the check valve 40 is a one-way control element. The check valve 40 is installed in the return pipe 2A1, so that the return pipe 2A1 has a directional locking function. The check valve 40 is unidirectionally open from the cold water chamber 21a to the post-filter structure 111A3.

[0048] The check valve 40 is positioned downstream of the return pump 30 along the water flow direction. This downstream placement allows the check valve 40 to directly bear the pressurized water flow, enabling it to open quickly and stably under sufficient positive pressure. Simultaneously, when the pump stops, the back pressure from the downstream pipeline immediately acts on the back of the valve disc, achieving rapid closure. This ensures more timely and reliable directional control response. It also prevents residual water inside the filter element 111 or in the pipeline from flowing back to unexpected locations in the pump body or cold water chamber 21a under gravity or pressure differential, thus avoiding reverse water hammer impact on the return pump 30 during the next startup.

[0049] like Figure 2 As shown, in some embodiments, two filter elements 111 are provided, distributing the water treatment function among two independent filter elements 111, rather than integrating it entirely into a single filter element 111. The two filter elements 111 include a first filter element 111A and a second filter element 111B. The first filter element 111A includes the aforementioned housing 111A1, a pre-filter structure 111A2, and a post-filter structure 111A3. The first filter element 111A adopts an integrated structure, enabling two-stage filtration while occupying only one filter cartridge mounting position, saving lateral installation space. The second filter element 111B is arranged downstream of the pre-filter structure 111A2 along the water flow direction, making it an intermediate treatment stage between the pre-filter structure 111A2 and the post-filter structure 111A3. The second filter is connected to both the pre-filter structure 111A2 and the post-filter structure 111A3 and has a different water treatment function than the pre-filter structure 111A2. The pre-filter structure 111A2 completes the initial interception, the second filter element 111B completes the intermediate deep treatment, and the post-filter structure 111A3 completes the final fine filtration or taste adjustment. The three-stage treatment performs its function and progresses step by step, so that the water that finally enters the cold water chamber 21a is guaranteed in terms of purity, taste and functionality.

[0050] In some embodiments, the pre-filter structure 111A2 includes at least wet-processed carbon fiber, which uses wet-formed activated carbon fiber material to adsorb and filter the incoming water, removing residual chlorine, some organic matter and small particles from the water, so as to provide the subsequent second filter element 111B with more stable water quality and lower residual chlorine content.

[0051] In some embodiments, the post-filter structure 111A3 includes at least a carbon rod, whose dense, compressed structure serves both adsorption and interception functions. When the return pipe 2A1 draws water from the cold water chamber 21a back for circulation, the water is further filtered each time it passes through the carbon rod, effectively removing trace amounts of odor-causing substances that may have accumulated during storage, ensuring the cold water maintains a fresh taste throughout the repeated circulation. Simultaneously, the carbon rod intercepts tiny particles that may detach from the second filter element 111B or the pipes, ensuring the water entering the cold water chamber 21a remains clear and transparent.

[0052] In some embodiments, the second filter element 111B includes at least a reverse osmosis membrane, which is capable of deep purification of water that has undergone preliminary treatment with wet carbon fiber. Utilizing the semi-permeable properties of the reverse osmosis membrane, the water treated by the pre-filter structure 111A2 is desalinated under pressure, removing heavy metals and most dissolved solids from the water, and producing pure water with high quality.

[0053] like Figure 2 As shown, in some embodiments, the cold water path 2A includes a first water quality sensor 50. The first water quality sensor 50 is disposed in the conveying flow path between the outlet of the post-filter structure 111A3 and the cold water tank 21. Whether it is fresh water entering during the initial water production or stored cold water that has been recycled and reprocessed, it must flow through the conveying flow path before entering the subsequent flow path. The first water quality sensor 50 is used to detect the water quality flowing through the conveying flow path, and can detect the water quality of the pure water output by the post-filter structure 111A3, so as to grasp the purification effect and avoid the purification not meeting the standards.

[0054] In some embodiments, the first water quality sensor 50 includes a total dissolved solids sensor, i.e., a TDS sensor, which indirectly reflects the total amount of dissolved solids in the water by detecting the concentration of conductive ions in the water, and is used to assess the purity of the water or the filtration effect.

[0055] like Figure 2 and Figure 3 As shown, in some embodiments, the coffee purification device 100 also includes a raw water tank 70, which is located upstream of the water supply treatment module 10 and is the water inlet starting component for the cold water circuit 2A and the hot water circuit 1A. The raw water tank 70 has a raw water chamber 70a, which is understood to be connected to the municipal water source outside the coffee purification device 100. The raw water is the initial water to be treated by the coffee purification device 100.

[0056] The raw water chamber 70a is used to store raw water and is connected to the pre-filter structure 111A2. That is, the pre-filter structure is the first treatment unit after the raw water enters the equipment. The direct connection with the raw water chamber 70a ensures that all raw water entering the equipment must pass through this protective barrier first, avoiding the direct impact of unfiltered water on the second filter element 111B or the post-filter structure, thus extending the service life of the overall filter media system.

[0057] like Figure 2 As shown, in some embodiments, the coffee purification device 100 also includes a self-priming pump 80, which is a power pressurization element. The self-priming pump 80 is installed on the water inlet pipe between the raw water tank 70 and the first filter element 111A. The water inlet of the self-priming pump 80 is connected to the raw water chamber 70a, and the water outlet of the self-priming pump 80 is connected to the water inlet of the pre-filter structure 111A2. The addition of the self-priming pump 80 frees the device from dependence on the gravity of the raw water or the pressure of the external pipe network. Even when the raw water tank 70 is installed at a low position or the water volume is small, it can actively draw out the raw water and send it into the pre-filter structure 111A2, ensuring the stability and reliability of the water supply process.

[0058] In some embodiments, the coffee purifier 100 further includes a second water quality sensor 90, which is disposed on the water inlet pipe. The addition of the second water quality sensor 90 enables the device to sense the raw water quality, and can obtain the initial water quality data of the raw water before it enters the filtration system. This provides a benchmark reference value for subsequent evaluation of the filtration effect and judgment of the filter media life. Located upstream of the self-priming pump 80 along the water flow direction, it forms a sequence of first detecting the raw water and then pressurizing and delivering it. The raw water is detected before entering any power component, avoiding the influence of pressure fluctuations or water flow turbulence generated during the operation of the self-priming pump 80 on the detection accuracy.

[0059] Furthermore, if the second water quality sensor 90 detects that the raw water quality is seriously out of standard, such as an abnormally high TDS, it can issue a timely warning or suspend water production to prevent inferior raw water from entering the filtration system and causing the filter media to be consumed or damaged too quickly. This achieves pre-inspection and protection of the inlet water quality of the filtration system.

[0060] Please continue reading. Figure 2 and Figure 3 In some embodiments, the raw water tank 70 also has a concentrated water chamber 70b that is isolated from the raw water chamber 70a. The raw water and wastewater are stored separately in the same raw water tank 70. The isolation between the two chambers prevents the concentrated water from flowing back and contaminating the raw water, so that the raw water always enters the water supply treatment module 10 in a relatively clean state. At the same time, the concentrated water can be stored centrally for other purposes or discharged uniformly, which improves the integration of the equipment and the space utilization rate.

[0061] The coffee purification device 100 also includes a concentrate pipeline 4A and a concentrate outlet valve 91, making the concentrate discharge path an independent and controllable part. The concentrate pipeline 4A connects the second filter element 111B and the concentrate chamber 70b. The concentrate produced by the second filter element 111B provides a complete flow path from the source to the collection container, allowing the concentrate to be delivered to the concentrate chamber 70b after production. This avoids the inconvenience of the concentrate remaining in the pipeline for a long time or requiring an additional container for collection. The concentrate outlet valve 91 is located on the concentrate pipeline 4A and is used to open and close the discharge of concentrate to the concentrate chamber 70b. When the second filter element 111B is working, the concentrate outlet valve 91 is open to allow the concentrate to be discharged smoothly. When the second filter element 111B stops working, the concentrate outlet valve 91 is closed to prevent the water in the concentrate chamber 70b from flowing back to the second filter element 111B due to pressure changes or shaking, thus preventing the concentrate from contaminating the membrane element or diluting the pure water.

[0062] In some embodiments, the coffee purification device 100 further includes an overflow valve 92, which is a pressure safety protection element. The overflow valve 92 is installed on the concentrate pipeline 4A to provide an overpressure protection mechanism for the concentrate pipeline 4A. It can directly monitor the actual pressure state within the pipeline, resulting in a more timely and accurate response. The overflow valve 92 is located downstream of the concentrate outlet valve 91. When the concentrate outlet valve 91 is open, the downstream pipeline may experience pressure buildup due to blockage, a full concentrate chamber 70b, or backflow of pressure within the concentrate chamber 70b. The overflow valve 92 is used to open when the pressure in the concentrate pipeline 4A exceeds a preset threshold, providing a pressure relief path for the concentrate. In other words, the overflow valve 92 has an automatic pressure relief capability. Through the pressure relief function that automatically opens at a preset threshold, the concentrate pipeline 4A can autonomously cope with abnormal pressure in the downstream section without human intervention. For example, when the concentrate outlet valve 91 is open normally, but the channel from the end of the concentrate pipeline 4A to the concentrate chamber 70b is blocked by foreign objects or the concentrate chamber 70b is full, resulting in poor drainage, the pressure in the downstream pipeline section will continue to rise. The overflow valve 92 automatically opens when the pressure exceeds the threshold, temporarily discharging the concentrate through the pressure relief port, thus preventing the pipeline from bursting or the joint from loosening due to the continuous increase in pressure.

[0063] like Figure 2 As shown, in some embodiments, the cold water circuit 2A includes a cold water inlet valve 60, which is disposed in the conveying flow path and located between the first water quality sensor 50 and the cold water tank 21. The cold water inlet valve 60 controls the opening or closing of the water flow from the outlet of the filter element 111 to the cold water chamber 21a, thereby realizing the on / off management of the water inlet to the cold water chamber 21a.

[0064] Specifically, the opening and closing of the cold water inlet valve 60 is at least related to the detection result of the first water quality sensor 50. When the water quality sensor detects the current water quality data, the control module of the coffee purification device 100 can determine whether to allow this portion of water to enter the cold water chamber 21a based on the data. If the detection value is abnormal, the cold water inlet valve 60 can be kept closed to prevent this portion of water from flowing in and trigger a corresponding prompt. If the detection value is normal, the valve can be opened to allow water to enter the cold water chamber 21a if the cold water chamber 21a needs to be replenished.

[0065] Please continue to participate. Figure 2 In some embodiments, the delivery path includes a branch path 1A1, a cold water branch path 2A2, and a hot water branch path 1A2. The branch path 1A1 is a shared path for both the hot water path 1A and the cold water path 2A. The branch path 1A1 is equipped with a first water quality sensor 50, capable of detecting the water quality of the water flowing out from the branch path 1A1. The cold water branch path 2A2 forms part of the cold water path 2A and is connected to the outlet of the branch path 1A1. The cold water branch path 2A2 is equipped with a cold water inlet valve 60, which directs a portion of the purified water to the low-temperature preparation module of the cold water path 2A. The hot water branch path 1A2 forms part of the hot extraction water path and is connected to the outlet of the branch path 1A1, allowing the hot water path 1A to independently draw water from the same purified water source and operate in parallel with the cold water path 2A.

[0066] It enables the directional allocation of a single filtered water source to two functional areas, cold and hot, allowing one water supply module 10 to simultaneously serve two water paths with different temperature requirements. This avoids the increased cost caused by repeatedly setting up filter units and creates a structural prerequisite for subsequent differentiated water quality monitoring and control of the cold and hot paths.

[0067] like Figure 4 , Figure 5 and Figure 6As shown, in some embodiments, the refrigeration component 22 has an ice-making mode and a cooling water mode. The refrigeration component 22 includes a compressor 221, a condenser 222, a throttling device, and an ice grid 223 connected to each other. The compressor 221 is used to compress and drive the refrigerant circulation. The condenser 222 is used to dissipate the heat of the high-temperature and high-pressure refrigerant into the environment. When the room-temperature and high-pressure liquid flows through the throttling device, the pressure drops sharply due to the throttling effect, and the temperature drops sharply at the same time, forming a low-temperature and low-pressure gas-liquid mixture of refrigerant. The low-temperature refrigerant then enters the ice grid 223 to absorb heat and realize the cooling function. The compressor 221, condenser 222, throttling device, and ice tray 223 are connected to form at least part of the refrigeration cycle. Specifically, the ice tray 223 serves as the evaporator component in the refrigeration cycle. It has internal heat exchange channels for refrigerant flow, made of a corrosion-resistant material with excellent thermal conductivity, integrated into the interior of the ice tray 223. The channels conform to the shape of the ice tray 223 and are evenly distributed throughout its area, maximizing the contact area between the refrigerant and water and improving heat exchange efficiency. The heat exchange channels exchange heat with water, and the adjustable heat exchange intensity can adapt to different ice-making speeds and chilled water temperature requirements. When the refrigeration unit 22 switches to ice-making mode, the refrigerant absorbs heat as it flows within the heat exchange channels, freezing the water in the ice tray 223 into ice. When switching to chilled water preparation mode, the refrigerant circulation can be adjusted, utilizing the heat exchange channels and water to cool the flowing water to the low temperature required for chilling, providing cooling capacity for chilled water preparation. The compatibility between the ice tray 223 and the refrigerant circulation system ensures the stable realization of the bidirectional refrigeration function of the refrigeration component 22, which not only meets the cold water requirements of cold extraction, but also ensures the stability of ice preparation and improves the reliability of the equipment.

[0068] like Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the ice tray 223 is located above the cold water chamber 21a, facilitating the flow of prepared cold water from top to bottom into the ice tray 223 using gravity. The low-temperature water preparation module 20 includes a water supply pipe 23, a circulation pump 24, and a branch pipe 25. The water supply pipe 23 is a dedicated channel for cold water delivery, connecting to the cold water chamber 21a and extending upwards, allowing water in the lower cold water chamber 21a to flow out through the water supply pipe 23. The circulation pump 24 is mounted on the water supply pipe 23 to provide power to deliver water from the cold water chamber 21a to the water supply pipe 23, ensuring that cold water can be smoothly delivered from bottom to top to the ice tray 223, avoiding obstructed water flow due to gravity, ensuring the continuity of water supply to the ice tray 223, and ensuring the stable operation of ice making and cold water preparation functions.

[0069] The diversion pipe 25 is designed to achieve uniform water distribution. It is connected to the upper end of the water supply pipe 23 and located above the ice grid 223. The diversion pipe 25 has multiple diversion ports 25a, which are connected to the ice grid 223. This prevents a single water flow from concentrating into a certain area of ​​the ice grid 223, ensuring uniform water volume in all areas of the ice grid 223. This allows the water to fully contact the heat exchange channel, improving heat exchange efficiency and ensuring the uniformity and stability of ice making and cold water preparation.

[0070] The ice tray 223 extends along the left and right direction of the coffee purification device 100, and the same is true for the diversion pipe 25, which is horizontally arranged above the ice tray 223. Multiple diversion ports 25a are arranged at least at intervals along the left and right direction, so that the water in the cold water chamber 21a flows into the ice tray 223 through the multiple diversion ports 25a.

[0071] Furthermore, the ice grid 223 has multiple ice-making slots 223a, each of which can independently form ice blocks, ensuring that the ice has a regular shape. Multiple ice-making slots 223a can simultaneously prepare multiple ice blocks, improving ice-making efficiency.

[0072] like Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the low-temperature water preparation module 20 includes an ice storage chamber 26, which stores the ice cubes prepared by the ice grid 223, achieving separate storage of ice cubes and cold water to prevent the ice cubes from melting quickly when mixed with cold water. It also provides a dedicated ice-retrieving container for users, meeting their ice-retrieving needs. The ice storage chamber 26 is movably installed within the cold water tank 21; that is, it is not fixedly installed inside the cold water tank 21 but is movable, allowing it to be movably installed in the cold water tank 21 via a sliding rail. The ice storage chamber 26 has a storage location within the cold water tank 21 and an ice-retrieving location exposed outside the cold water tank 21. The ice storage chamber 26 can be exposed outside the casing 1 of the coffee purifier 100, allowing users to scoop ice from the ice-retrieving location. When the ice storage compartment 26 is switched to the ice-retrieving position, its ice-retrieving area can be fully exposed outside the device housing 1 without being obstructed by the housing 1. Users can directly scoop ice at this position using an ice-scooping tool without disassembling the coffee purification device 100, thus improving the convenience of ice retrieval. After retrieving the ice, the ice storage compartment 26 is pushed into the cold water tank 21, causing the ice storage compartment 26 to reset.

[0073] The refrigeration component 22 selectively cools water flowing through the ice tray 223 into cold water or freezes it into ice cubes by adjusting the operating frequency of the compressor 221. When ice water needs to be prepared, the compressor 221 is adjusted to a lower operating frequency to cool the water flowing through the ice tray 223 to a cold water state, suitable for cold brew coffee. When ice cubes need to be prepared, the compressor 221 is adjusted to a higher operating frequency to freeze the water flowing through the ice tray 223 into ice cubes, achieving selective preparation of cold water and ice cubes. The cold water chamber 21a is used to store cold water, which is located at the bottom of the ice storage chamber 26. The stored cold water is suitable for cold brew coffee preparation and direct drinking. The ice storage chamber 26 is used to store ice cubes, achieving separation of ice cubes and ice water, preventing ice cubes from melting quickly after mixing with ice water, ensuring long-term preservation of ice cubes, and providing a dedicated container for users to take ice on demand.

[0074] like Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the low-temperature water preparation module 20 further includes a water receiving component 27, which is arranged below the ice-making grid 223 and has a water receiving trough 27a. The water receiving trough 27a is grooved and can receive cold water falling from the ice-making grid 223. Along the vertical direction, the projection of all ice-making troughs 223a is located within the projection range of the water receiving trough 27a, so as to collect the falling cold water in a concentrated manner and prevent the cold water from spreading and flowing or flowing into the ice storage chamber 26.

[0075] Furthermore, the water receiving trough 27a extends from top to bottom to the cold water chamber 21a, which is used to receive cold water and guide the cold water into the cold water chamber 21a. This allows the cold water received by the water receiving part 27 to flow into the cold water chamber 21a along the water receiving trough 27a, ensuring smooth flow of cold water without significant resistance. The extension length is adapted to the internal vertical space of the equipment and fits the compact layout of the equipment.

[0076] Specifically, the water receiving component 27 includes an integrally formed water receiving section and a water guiding section, which together define the water receiving trough 27a. The water receiving section and the diversion pipe 25 are arranged parallel to each other in axis, and their length is adapted to the length of the ice tray 223, so as to receive the cold water falling from the ice tray 223. The water guiding section is connected to the end of the water receiving section and extends from top to bottom. The vertical arrangement of the water guiding section ensures that the cold water can flow naturally by gravity without additional power, replenishing the cold water reserve of the cold water chamber 21a and ensuring a stable cold water supply.

[0077] like Figure 2As shown, in some embodiments, a refrigerant branch pipe 3A is provided between the compressor 221 and the ice tray 223. The refrigerant branch pipe 3A is connected in series between the compressor 221 and the ice tray 223. The high-temperature and high-pressure refrigerant gas compressed by the compressor 221 but not cooled by the condenser 222 is directly, stably and sealedly delivered to the ice tray 223. The heat of the high-temperature refrigerant is used to heat the ice tray 223, so that the ice blocks formed in the ice tray 223a are separated from the inner wall of the ice tray 223a, realizing the de-icing function and ensuring that the ice blocks can fall smoothly into the ice storage chamber 26.

[0078] The refrigeration assembly 22 also includes a refrigerant valve 224, which is located on the refrigerant branch pipe 3A and is used to control the opening and closing of the refrigerant branch pipe 3A. The valve can control its opening and closing according to actual ice removal and ice making needs, thereby controlling the flow and blockage of high-temperature refrigerant within the refrigerant branch pipe 3A. By controlling the opening and closing of the refrigerant branch pipe 3A, precise control of the high-temperature refrigerant supply for ice removal from the ice tray 223 is achieved. When ice making is complete and ice removal is required, the refrigerant valve 224 is opened, allowing the high-temperature refrigerant generated by the compressor 221 to directly enter the ice tray 223 through the refrigerant branch pipe 3A, using the high temperature to separate the ice from the ice tray 223a.

[0079] In this embodiment, the refrigerant valve 224 enables on-demand control of the high-temperature refrigerant used for de-icing. It can flexibly open or close the supply of high-temperature refrigerant according to the de-icing requirements, avoiding incomplete de-icing due to insufficient supply of high-temperature refrigerant during the de-icing stage, or the entry of high-temperature refrigerant into the ice grid 223 during the non-de-icing stage, which affects the ice-making efficiency, while effectively reducing energy consumption.

[0080] like Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the opening of the ice storage chamber 26 is set upwards, serving as the falling channel for ice blocks to fall from the ice grid 223. The ice grid 223 is located above the ice storage chamber 26, and the distance between the ice grid 223 and the ice storage chamber 26 is adapted to the ice block sliding trajectory, avoiding the ice blocks from scattering due to excessive distance or getting stuck due to insufficient distance.

[0081] The ice grid 223 is installed vertically, and the opening of the ice trough 223a is arranged facing the side where the ice storage chamber 26 is located. That is, after the ice blocks formed in the ice trough 223a slide out, they can move directly towards the ice storage chamber 26, thus preventing the ice blocks from deviating from their trajectory and failing to fall into the ice storage chamber 26.

[0082] Furthermore, the depth direction of the ice-making tank 223a is set at an angle to the vertical direction so that the detached ice blocks fall into the ice storage chamber 26. Utilizing gravity, the ice blocks formed in the ice-making tank 223a can slide out naturally along the inclined tank, achieving de-icing without flipping the ice grid 223. At the same time, it ensures that the ice blocks can accurately fall into the ice storage chamber 26 below after sliding out, simplifying the de-icing process.

[0083] Alternatively, the ice-making tank 223a has its walls tilted downwards towards the side where the ice storage bin 26 is located. The ice blocks in the ice-making tank 223a can slide out of the ice grid 223 with the help of the tilted walls and gravity, thus removing the ice without having to flip the ice grid 223. At the same time, the ice blocks are guided towards the ice storage bin 26, ensuring that the ice blocks fall accurately into the ice storage bin 26 with the opening facing upwards.

[0084] In some embodiments, the low-temperature water preparation module 20 includes a position sensor. The position sensor is used to detect the position of the ice storage compartment 26. The position sensor is located on the side of the cold water tank 21 facing the ice storage compartment 26 to improve sensing accuracy and avoid signal delay and misjudgment due to excessive installation distance. The position sensor generates a status signal indicating that the ice storage compartment 26 is in place when it is in the retracted position. That is, when the ice storage compartment 26 is housed in the cold water tank 21, the position sensor generates and outputs a clear status signal indicating that the ice storage compartment 26 is accurately in place. This provides a basis for judgment for the equipment control system, allowing the control system to control the operation of components such as the refrigeration component 22 and the ice grid 223 based on the position of the ice storage compartment 26. This prevents the equipment from activating related components when the ice storage compartment 26 is not fully retracted, such as activating the ice-making function, which could lead to ice spillage, component collisions, or a large loss of cold energy, thus ensuring the safe and stable operation of the equipment.

[0085] like Figure 2 and Figure 5 As shown, in some embodiments, the low-temperature water preparation module 20 further includes at least one of the following disposed within the cold water chamber 21a: A water level detection device 281 is installed inside the cold water chamber 21a to detect the water level within the chamber. It may include a high-level float and a low-level float to ensure the detection of different water level states. The high-level float generates a high-level signal when the water level inside the cold water chamber 21a rises to the maximum allowable level, and feeds it back to the control module to stop water intake. The low-level float detects whether the water level in the cold water chamber 21a has dropped to the minimum preset water level. It generates a low-level signal when the water level inside the pure water chamber drops to the minimum working water level, and feeds it back to the control module to provide a water shortage warning. It can also replenish the cold water chamber 21a with new pure water from the outlet of the filter assembly.

[0086] Temperature sensor 282 is used to detect the water temperature in cold water chamber 21a. Temperature sensor 282 can detect the temperature of cold water in cold water chamber 21a and provide feedback water temperature data to provide a basis for judgment on the operation and adjustment of refrigeration component 22, so as to ensure that the water temperature in cold water chamber 21a is maintained within a suitable range to meet the needs of cold brew coffee preparation, direct drinking and ice making.

[0087] The sterilization module 283 is used to sterilize the water in the cold water chamber 21a. It can sterilize the cold water stored in the cold water chamber 21a, remove harmful microorganisms such as bacteria and mold in the water, avoid bacterial growth caused by long-term storage of ice water, ensure the cleanliness and drinking safety of cold water, and extend the service life of the cold water chamber 21a, and prevent scaling and damage to components caused by microbial adhesion.

[0088] In some embodiments, the coffee purification device 100 includes a pressurized instant heating component 97, which is disposed on the hot water circuit 1A and arranged downstream of the water supply treatment module 10 along the water flow direction. During operation, it is used to heat the water flowing into the pressurized instant heating component 97. The pressurized instant heating component 97 can quickly produce high-temperature water that meets the requirements of high-temperature coffee extraction and has pressure resistance, so as to adapt to changes in water flow pressure within the device.

[0089] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, the coffee purification device 100 includes an extraction module 93, which is a functional component for coffee extraction. It is arranged downstream of the low-temperature water preparation module 20 and the pressurized instant heating component 97 along the water flow direction. It is used at least for low-temperature extraction and high-temperature extraction of coffee concentrate. The extraction module 93 can fully contact the cold water from the cold water chamber 21a with the coffee powder in a low-temperature environment and extract coffee flavor substances through long-term soaking or slow drip filtration to form cold brew coffee liquid.

[0090] The coffee purification device 100 in this embodiment can achieve independent operation of both hot and cold brew functions, improving the device's versatility and reducing water temperature fluctuations caused by interference between the two water circuits. Through the orderly arrangement of the water supply treatment module 10, the low-temperature water preparation module 20, and the extraction module 93 in the cold water circuit 2A, the entire process of cold brew coffee preparation is made convenient, eliminating the need for users to prepare additional purified water and external cold water. The water supply treatment module 10 can effectively purify the raw water to ensure the purity of the cold brew water. The low-temperature water preparation module 20 does not rely on an ice tank and can independently and efficiently prepare and store low-temperature water, significantly shortening the cold water preparation time and achieving a continuous and stable supply of low-temperature water. The extraction module 93 can fully extract the coffee concentrate in a stable low-temperature environment, avoiding the sour taste caused by high temperatures and ensuring that the cold brew coffee has a smooth taste and pure flavor.

[0091] In this design, the pressurized instant heating component 97 and the cold water preparation module are arranged in parallel. The inlets of both are connected downstream of the water supply module 10, and their outlets are connected upstream of the extraction module 93, forming parallel water flow channels that are not connected in series and do not interfere with each other. This parallel arrangement reduces water temperature interference caused by shared flow paths. The cold water prepared by the cold water preparation module does not need to flow through the non-operating pressurized instant heating component 97, preventing temperature increases due to residual heat or temperature conduction, and thus maintaining a stable preset low temperature. Similarly, the hot water prepared by the pressurized instant heating component 97 does not need to flow through the non-operating cold water preparation module, preventing temperature decreases due to low-temperature conduction, and thus maintaining a stable preset high temperature. Simultaneously, the parallel arrangement enables independent delivery and preparation of high-temperature cold water, improving the accuracy and response speed of water temperature regulation. This ensures that the extraction module 93 receives a stable and precise high-temperature cold water source, thereby guaranteeing the flavor stability of coffee extraction at both high and low temperatures.

[0092] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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 accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0093] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0094] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0095] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0096] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A coffee purification device, characterized in that, It includes a hot water circuit and a cold water circuit that is at least partially independent of the hot water circuit, the cold water circuit including: A water supply treatment module includes at least one filter element, wherein one of the filter elements includes a housing and a pre-filter structure and a post-filter structure both disposed within the housing, and the pre-filter structure and the post-filter structure have different water quality treatment functions. A low-temperature water preparation module is arranged downstream of the water supply treatment module along the water flow direction. The low-temperature water preparation module includes a cold water tank and a refrigeration assembly. The cold water tank has a cold water chamber connected to the outlet of the filter element, and is used at least to store cold water cooled by the refrigeration assembly. A return pipe is connected to the cold water chamber and the post-filter structure. The return pipe is used to return the cold water in the cold water chamber to the post-filter structure so that the cold water is treated by the post-filter structure at least once.

2. The coffee purification device according to claim 1, characterized in that, The cold water circuit includes: A reflux pump is installed in the reflux pipeline. The inlet of the reflux pump is connected to the cold water chamber, and the outlet is connected to the post-filter structure.

3. The coffee purification device according to claim 2, characterized in that, The reflux pump includes a micro centrifugal pump or a micro diaphragm pump.

4. The coffee purification device according to claim 2, characterized in that, The cold water circuit includes: A check valve is installed in the return pipeline and arranged downstream of the return pump along the water flow direction. The check valve allows unidirectional flow from the cold water chamber to the post-filter structure.

5. The coffee purification device according to claim 1, characterized in that, The cold water circuit includes: The first water quality sensor is installed on the conveying flow path between the outlet of the post-filter structure and the cold water tank, and is used to detect the water quality flowing through the conveying flow path.

6. The coffee purification device according to claim 5, characterized in that, The first water quality sensor includes a total dissolved solids sensor.

7. The coffee purification device according to claim 5, characterized in that, The cold water circuit includes: A cold water inlet valve is installed in the delivery path, located between the first water quality sensor and the cold water tank.

8. The coffee purification device according to claim 7, characterized in that, The conveying path includes: The diversion flow path is equipped with the first water quality sensor; A cold water branch, forming part of the cold water path, is connected to the outlet end of the branch flow path, and the cold water branch is equipped with the cold water inlet valve; and The hot water branch is a portion that forms the hot water path and is connected to the outlet end of the branch flow path.

9. The coffee purification device according to claim 1, characterized in that, The refrigeration assembly includes a compressor, a condenser, and an ice tray connected together. The ice tray has a heat exchange channel inside for refrigerant flow and heat exchange with water. The ice tray is connected to the cold water chamber.

10. The coffee purification device according to claim 9, characterized in that, The low-temperature water preparation module includes: A water supply pipe is connected to the cold water chamber and extends from bottom to top. A circulating pump, installed on the water supply pipe, is used to transport water from the cold water chamber to the water supply pipe; and A diversion pipe is connected to and communicates with the upper end of the water supply pipe, located above the ice grid. The diversion pipe has multiple diversion ports, which are connected to the ice grid.

11. The coffee purification device according to claim 9, characterized in that, The low-temperature water preparation module includes: An ice storage compartment is movably disposed within the cold water tank, having a storage location within the cold water tank and an ice-retrieving location exposed outside the cold water tank. The refrigeration component selectively cools the flowing water into ice water or freezes it into ice cubes by adjusting the operating frequency of the compressor. The cold water chamber is used to store the ice water, and the ice storage chamber is used to store the ice cubes.

12. The coffee purification device according to claim 11, characterized in that, The low-temperature water preparation module includes: A water receiving component is arranged below the ice grid and has a water receiving groove, with a portion of the water receiving groove extending from top to bottom into the cold water cavity for receiving the cold water and guiding the cold water into the cold water cavity.

13. The coffee purification device according to claim 11, characterized in that, A refrigerant branch pipe is provided between the compressor and the ice tray, and the refrigeration assembly further includes: A refrigerant valve is installed on the refrigerant branch pipe and is used to control the on / off state of the refrigerant branch pipe.

14. The coffee purification device according to claim 11, characterized in that, The ice storage compartment has an upward-facing opening, and the ice grid is located above the ice storage compartment and has multiple ice-making slots. The openings of the ice-making slots are arranged facing the side where the ice storage compartment is located, and the depth direction of the ice-making slots is set at an angle to the vertical direction so that the falling ice blocks fall into the ice storage compartment.

15. The coffee purification device according to claim 11, characterized in that, The low-temperature water preparation module includes: A position sensor is disposed on the side of the cold water tank facing the ice storage compartment, and is used to generate a status signal indicating that the ice storage compartment is in place when the ice storage compartment is in the storage position.

16. The coffee purification device according to claim 1, characterized in that, The low-temperature water preparation module further includes at least one of the components disposed within the cold water chamber: A water level detection device is used to detect the water level in the cold water chamber; A temperature sensor is used to detect the water temperature inside the cold water chamber; The sterilization module is used to sterilize the water in the cold water chamber.

17. The coffee purification device according to claim 1, characterized in that, The filter element is provided in two parts, and the two filter elements include: The first filter element includes the housing, the pre-filter structure, and the post-filter structure; and The second filter element is arranged downstream of the pre-filter structure along the water flow direction, is connected to the pre-filter structure and the post-filter structure, and has a different water treatment function than the pre-filter structure.

18. The coffee purification device according to claim 17, characterized in that, The pre-filter structure includes at least wet-laid carbon fiber; and / or The post-filtration structure includes at least a carbon rod; and / or The second filter element includes at least a reverse osmosis membrane.

19. The coffee purification device according to claim 17, characterized in that, The coffee purification device also includes: The raw water tank is located upstream of the water supply treatment module. The raw water tank has a raw water chamber for storing raw water and is connected to the pre-filter structure.

20. The coffee purification device according to claim 19, characterized in that, The coffee purification device also includes: A self-priming pump is installed on the inlet pipe between the raw water tank and the first filter element. The inlet end of the self-priming pump is connected to the raw water chamber, and the outlet end of the self-priming pump is connected to the inlet of the pre-filter structure.

21. The coffee purification device according to claim 20, characterized in that, The coffee purification device also includes: The second water quality sensor is installed on the water inlet pipe and located upstream of the self-priming pump along the water flow direction.

22. The coffee purification device according to claim 19, characterized in that, The raw water tank also has a concentrated water chamber isolated from the raw water chamber, and the coffee purification device further includes: The concentrate pipeline connects the second filter element and the concentrate chamber; and A concentrate outlet valve is installed on the concentrate pipeline and is used to open and close the discharge of concentrate into the concentrate chamber.

23. The coffee purification device according to claim 22, characterized in that, The coffee purification device also includes: An overflow valve is installed on the concentrate pipeline and located downstream of the concentrate outlet valve. The overflow valve is used to open when the pressure in the concentrate pipeline exceeds a preset threshold, providing a pressure relief path for the concentrate.

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