Waterway system for a coffee machine and coffee machine

Abstract

The utility model relates to the field of beverage making device, and specifically discloses a waterway system for soy coffee machine and soy coffee machine, which comprises a source water tank, a hot water supply boiler, a soybean milk brewing pipeline, a safety pressure relief subsystem, a coffee making subsystem and a steam generating boiler. The coffee making subsystem comprises a coffee extraction pipeline and a steam supply pipeline. The coffee extraction pipeline and the soybean milk brewing pipeline are both in fluid communication with the hot water supply boiler. The steam supply pipeline is connected to the steam supply boiler to provide high-temperature steam for coffee making. The safety pressure relief subsystem comprises a hot water pressure relief pipeline and a steam pressure relief pipeline. The waterway system has a drain outlet. The hot water supply boiler and the steam generating boiler are respectively connected to the drain outlet through the hot water pressure relief pipeline and the steam pressure relief pipeline. The utility model integrates coffee making and soybean milk making into one device and manages the pressure of the hot water supply boiler and the steam generating boiler through the hot water pressure relief pipeline and the steam pressure relief pipeline, respectively, to ensure that the device can still operate safely under high pressure.

Description

Technical Field

[0001] This utility model relates to the field of beverage making devices, and in particular to a water circuit system and a bean coffee machine. Background Technology

[0002] In the beverage preparation equipment sector, bean coffee machines, as innovative devices that can simultaneously meet consumers' needs for both coffee and soy milk, are gradually gaining market attention. As people's living standards improve, their demands for the convenience, variety, and quality of beverage preparation are also increasing. Traditional coffee machines and soy milk machines are single-function, only capable of making coffee or soy milk respectively, failing to meet consumers' needs for preparing multiple beverages on a single device. Therefore, bean coffee machines, integrating coffee and soy milk preparation functions, have emerged.

[0003] While existing coffee makers on the market have made some progress in fulfilling basic functions, they still have many shortcomings in water system design. Regarding the completeness of the water system, most coffee makers only have basic hot water supply functions for coffee extraction and soy milk brewing. However, many devices lack a dedicated steam supply system for the milk frothing function required in the coffee-making process, thus failing to provide consumers with a wide variety of coffee beverage options, such as cappuccinos and lattes that require milk frothing.

[0004] Furthermore, in terms of safety, existing coffee machine water systems often neglect safety pressure relief design. Hot water supply boilers and steam generators produce high pressure during operation; if this pressure cannot be released effectively and in a timely manner, it may damage the equipment or even cause safety accidents, threatening the personal safety and property of users. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a water circuit system for a coffee machine that is multifunctional, safe and reliable and has a high water resource utilization rate. To achieve the above objectives, this utility model provides a water system for a soy milk coffee maker, including a source water tank, a hot water supply boiler, a soy milk brewing pipeline, and a safety pressure relief subsystem. The hot water supply boiler is connected to the soy milk brewing pipeline via a hot water control valve. It also includes: A coffee making subsystem and a steam generating boiler, the coffee making subsystem including a coffee extraction pipeline and a steam supply pipeline, the coffee extraction pipeline and the soy milk brewing pipeline being fluidly connected to the hot water supply boiler, and the steam supply pipeline being connected to the steam generating boiler to provide high-temperature steam for making coffee; The safety pressure relief subsystem includes a hot water pressure relief pipeline and a steam pressure relief pipeline. The water system has at least one drain outlet. The hot water supply boiler and the steam generating boiler are respectively connected to the drain outlet through the hot water pressure relief pipeline and the steam pressure relief pipeline.

[0006] Furthermore, the water system also includes a cold water supply pipeline connected to the source water tank, and the cold water supply pipeline is connected to the soy milk brewing pipeline through a cold water control valve; the inlet pipeline of the hot water supply boiler and the cold water supply pipeline are both connected to the source water tank via a first inlet pump. Furthermore, a first safety valve is connected to the inlet pipe of the hot water supply boiler, and the first safety valve is connected to the drain outlet to connect the inlet pipe and the drain outlet when the inlet pressure of the hot water supply boiler exceeds a set threshold. Furthermore, the inlet pipe of the hot water supply boiler is connected to the hot water supply boiler and the first safety valve via a first tee pipe. Furthermore, a second safety valve is connected to the water inlet pipe of the steam generating boiler. The second safety valve is connected to the drain outlet to connect the water inlet pipe and the drain outlet when the water inlet pressure of the steam generating boiler exceeds a set threshold. Furthermore, the water inlet pipe of the steam generating boiler is connected to the steam generating boiler and the second safety valve via a second tee pipe. Furthermore, the steam generating boiler is connected to the source water tank via a second inlet pump, and the second safety valve is connected to the outlet side pipeline of the second inlet pump. Furthermore, the inlet side of the first water pump is connected to the source water tank via a flow meter, and the outlet side is connected to the inlet pipeline of the hot water supply boiler via a one-way valve. Furthermore, the hot water supply boiler is connected to the coffee extraction pipeline and the hot water pressure relief pipeline respectively through a first three-way valve; the steam generating boiler is connected to the steam supply pipeline and the steam pressure relief pipeline respectively through a second three-way valve. On the other hand, this utility model provides a coffee bean machine, including a body, characterized in that the body is equipped with an extraction device and a brewing device, the extraction device is used to extract coffee powder with hot water to obtain coffee liquid, the brewing device is used to brew soy milk powder with hot water to obtain soy milk, and the body is provided with the water circuit system of the coffee bean machine as described above.

[0007] Due to the adoption of the above technical solutions, this utility model has the following beneficial effects: This invention integrates a coffee-making subsystem and a soy milk brewing pipeline, and is equipped with an independent steam boiler, enabling a single device to simultaneously meet the needs of coffee extraction, milk frothing (steam supply), and soy milk brewing. Compared to traditional single-function beverage machines (such as those that can only make coffee or soy milk), this design significantly improves the practicality and space utilization of the equipment. Specifically, the hot water supply boiler provides hot water for both the coffee extraction and soy milk brewing pipelines, while the steam boiler can be used for milk frothing, avoiding the problem of unstable water temperature caused by sharing a boiler in traditional equipment. Simultaneously, this invention's safety pressure relief subsystem manages the pressure of the hot water supply boiler and the steam boiler separately through hot water and steam pressure relief pipelines, ensuring safe operation of the equipment under high pressure. Furthermore, it can more accurately respond to pressure fluctuations from different boilers, reducing the risk of equipment failure. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0009] Figure 1 This is a schematic diagram of the water system of the coffee machine in an embodiment of this utility model; Figure 2 This is a schematic diagram of the bean coffee machine in an embodiment of this utility model.

[0010] Figure label: 100. Coffee maker; 101. Coffee powder dispenser; 102. First soy milk powder dispenser; 103. Second soy milk powder dispenser; 104. Extractor; 105. First stirrer; 106. Second stirrer; 107. Liquid dispensing device; 200. Water system; 201. Source water tank; 202. Drain outlet; 203. Hot water supply boiler; 204. Steam generating boiler; 205. Soy milk brewing pipeline; 2051. First brewing branch; 2052. Second brewing branch; 2053. Hot water direct drinking branch; 206. Cold water supply pipeline; 2061. First cold water supply branch; 2062. Second cold water supply branch; 2063. Third cold water supply branch; 207. Coffee extraction pipeline; 208. Steam supply pipeline; 209. Hot water pressure relief pipeline; 210. Steam pressure relief pipeline; 211. Overflow. Piping; 212, First safety valve; 213, Second safety valve; 214, Hot water boiler inlet pipe; 215, Steam boiler inlet pipe; 216, Hot water control valve; 217, Cold water control valve; 218, First three-way valve; 219, Second three-way valve; 220, Source water supply pipe; 221, Self-priming pump; 222, Inlet solenoid valve; 223, Flow meter; 224, First inlet pump; 225, Check valve; 226, Second inlet pump; 227, Two-way valve; 228, Wastewater tank; 229, First three-way pipe; 230, Second three-way pipe; 231, Third three-way pipe. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0012] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0013] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. They are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0014] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0016] Example 1: Please see Figure 1This embodiment provides a water system 200 for a coffee maker, including a source water tank 201, a hot water supply boiler 203, a soy milk brewing pipeline 205, and a safety pressure relief subsystem. The hot water supply boiler 203 is connected to the soy milk brewing pipeline 205 via a hot water control valve 216. The water system 200 also includes a coffee making subsystem and a steam generating boiler 204. The coffee making subsystem includes a coffee extraction pipeline 207 and a steam supply pipeline 208. Both the coffee extraction pipeline 207 and the soy milk brewing pipeline 205 are fluidly connected to the hot water supply boiler 203. The steam supply pipeline 208 is connected to the steam generating boiler 204 to provide high-temperature steam for coffee making. The safety pressure relief subsystem includes a hot water pressure relief pipeline 209 and a steam pressure relief pipeline 210. The water system 200 has a drain outlet 202. The hot water supply boiler 203 and the steam generating boiler 204 are connected to the drain outlet 202 via the hot water pressure relief pipeline 209 and the steam pressure relief pipeline 210, respectively.

[0017] In this embodiment, the source water tank 201 is used to store the source water required for making beverages. Its inlet is connected to a source water supply pipe 220, which is equipped with a self-priming pump 221 and an inlet solenoid valve 222 for automatic water supply control. When the water level in the source water tank 201 is lower than a preset value, the inlet solenoid valve 222 opens, and the self-priming pump 221 starts, pumping external water into the source water tank 201 through the source water supply pipe 220. When the water level reaches a preset high level, the inlet solenoid valve 222 closes, and the self-priming pump 221 stops working. The source water tank 201 can be made of food-grade stainless steel.

[0018] In this embodiment, the hot water supply boiler 203 is used to provide the hot water required for coffee extraction and soy milk brewing. A hot water boiler inlet pipe 214 is provided between the source water tank 201 and the hot water supply boiler 203. The steam generating boiler 204 is used to provide the high-temperature steam required for coffee making, and a steam boiler inlet pipe 215 is provided between the source water tank 201 and the steam generating boiler 204. The hot water supply boiler 203 may adopt a double-layer stainless steel structure, have a power of 2000W, and may be equipped with a PID temperature control system for precise water temperature control. The steam generating boiler 204 adopts an instantaneous heating design, has a power of 1400W, and can generate 120°C dry steam within 3 seconds.

[0019] In some embodiments, the water system 200 further includes a cold water supply pipe 206 connected to the source water tank 201. The cold water supply pipe 206 is connected to the soy milk brewing pipe 205 via a cold water control valve 217, for supplementing the soy milk brewing pipe 205 with ambient cold water to regulate the water temperature. The inlet pipe of the hot water supply boiler 203 (i.e., the hot water boiler inlet pipe 214) and the cold water supply pipe 206 are both connected to the source water tank 201 via a first inlet pump 224.

[0020] In some embodiments, a first safety valve 212 is connected to the inlet pipe (i.e., hot water boiler inlet pipe 214) of the hot water supply boiler 203. The first safety valve 212 is connected to the drain outlet 202 to connect the inlet pipe and the drain outlet 202 when the inlet pressure of the hot water supply boiler 203 exceeds a set threshold. Specifically, the inlet pipe of the hot water supply boiler 203 is connected to the hot water supply boiler 203 and the first safety valve 212 via a first tee pipe 229. This design ensures that when the pressure in the inlet pipe is too high, excess water is discharged to the drain outlet 202 through the first safety valve 212, thereby protecting the hot water supply boiler 203 from damage caused by excessive pressure.

[0021] In some embodiments, a second safety valve 213 is connected to the water inlet pipe (i.e., steam boiler inlet pipe 215) of the steam generator boiler 204. The second safety valve 213 is connected to the drain outlet 202 to connect the water inlet pipe and the drain outlet 202 when the water inlet pressure of the steam generator boiler 204 exceeds a set threshold. Specifically, the water inlet pipe (i.e., steam boiler inlet pipe 215) of the steam generator boiler 204 is connected to the steam generator boiler 204 and the second safety valve 213 via a second tee pipe 230. This design ensures that when the water inlet pipe pressure of the steam generator boiler 204 is too high, excess water is discharged to the drain outlet 202 through the second safety valve 213, thereby protecting the steam generator boiler 204 from damage caused by excessive pressure.

[0022] In a further embodiment, the steam generating boiler 204 is connected to the source water tank 201 via the second inlet pump 226, and the second safety valve 213 is connected to the outlet side pipeline of the second inlet pump 226.

[0023] In addition, the inlet side of the first inlet pump 224 is connected to the source water tank 201 via a flow meter 223, and the outlet side is connected to the inlet pipe of the hot water supply boiler 203 (i.e., the hot water boiler inlet pipe 214) via a one-way valve 225. The flow meter 223 is used to monitor the water flow rate entering the first inlet pump 224 to ensure that the system operates within the set flow rate range. The one-way valve 225 is used to prevent hot water backflow and ensure that the water flow in the inlet pipe of the hot water supply boiler 203 is unidirectional. The flow meter 223 can be a Hall effect sensor with a measurement accuracy of ±2% to monitor the inlet water volume in real time.

[0024] In some embodiments, the hot water supply boiler 203 is connected to the coffee extraction pipeline 207 and the hot water pressure relief pipeline 209 via a first three-way valve 218; the steam generating boiler 204 is connected to the steam supply pipeline 208 and the steam pressure relief pipeline 210 via a second three-way valve 219. The design of the first three-way valve 218 and the second three-way valve 219 allows the system to flexibly control the flow direction of hot water and steam, selectively supplying hot water or steam according to user needs, while ensuring that excess pressure can be discharged through the pressure relief pipeline when the pressure is too high.

[0025] The first three-way valve 218 is connected to the piping system of the hot water supply boiler 203. Its function is to enable the hot water supply boiler 203 to connect to the coffee extraction pipeline 207 and the hot water pressure relief pipeline 209 respectively.

[0026] When hot water is normally supplied for coffee extraction: When a user needs to make coffee, and the system requires hot water from the hot water supply boiler 203 to the coffee extraction pipeline 207, the first three-way valve 218 changes its internal channel state, connecting the outlet of the hot water supply boiler 203 to the inlet of the coffee extraction pipeline 207, while simultaneously blocking the connection between the hot water supply boiler 203 and the hot water pressure relief pipeline 209. In this way, the heated hot water in the hot water supply boiler 203 flows into the coffee extraction pipeline 207 through the connected channel for the coffee extraction process.

[0027] When system pressure is too high and pressure relief is required: During the operation of the hot water supply boiler 203, if the internal pressure exceeds the set threshold, in order to protect the hot water supply boiler 203 from damage due to excessive pressure, the first three-way valve 218 will adjust its internal passage, connecting the outlet of the hot water supply boiler 203 to the hot water pressure relief pipe 209, while simultaneously blocking the connection to the coffee extraction pipe 207. At this time, the high-pressure hot water in the hot water supply boiler 203 will flow through the hot water pressure relief pipe 209 to the drain outlet 202, releasing the excess pressure until the pressure returns to a safe range.

[0028] The second three-way valve 219 is installed in the piping system of the steam generating boiler 204. Its function is to allow the steam generating boiler 204 to connect to the steam supply pipeline 208 and the steam pressure relief pipeline 210 respectively.

[0029] When steam is normally supplied for coffee making: When a user needs to make coffee, and the system requests the steam generator 204 to supply high-temperature steam to the steam supply pipeline 208, the second three-way valve 219 will activate, changing its internal channel structure to connect the steam outlet of the steam generator 204 to the inlet of the steam supply pipeline 208, while simultaneously disconnecting the steam generator 204 from the steam pressure relief pipeline 210. In this way, the high-temperature steam generated in the steam generator 204 will enter the steam supply pipeline 208 along the connected channel for operations such as milk frothing during the coffee making process.

[0030] When system pressure is too high and pressure relief is required: During the operation of steam generator boiler 204, if the internal steam pressure exceeds the set threshold, to protect steam generator boiler 204 from excessive pressure, the second three-way valve 219 will adjust its internal passage, connecting the steam outlet of steam generator boiler 204 to steam pressure relief pipeline 210, while simultaneously blocking the connection with steam supply pipeline 208. At this time, the high-pressure steam inside steam generator boiler 204 will flow through steam pressure relief pipeline 210 to drain outlet 202, releasing excess pressure until the pressure drops to a safe range.

[0031] In some embodiments, the first water inlet pump 224 is connected to the hot water boiler inlet pipe 214 and the cold water supply pipe 206 respectively through the third tee pipe 231. That is, after the water output by the first water inlet pump 224 is split through the third tee pipe 231, part of it enters the hot water supply boiler 203 for heating, and the other part directly enters the cold water supply pipe 206 as temperature-regulating cold water. This integrated design reduces the number of pumps, lowers equipment costs and failure rate.

[0032] In some embodiments, a two-way valve 227 is connected between the steam generator boiler 204 and the second inlet pump 226, and a second three-way pipe 230 is connected to the inlet side of the two-way valve 227. The design of the two-way valve 227 allows the system to flexibly control the water inlet of the steam generator boiler 204, selectively opening or closing the water inlet according to user needs, thereby improving the system's flexibility and controllability.

[0033] The two-way valve 227 is connected to the pipeline between the steam generator boiler 204 and the second water inlet pump 226. Its function is to flexibly control the water inlet of the steam generator boiler 204.

[0034] Water Inlet Activation: When the system detects that the steam generator boiler 204 needs water to generate steam, or when the steam generation function needs to be activated according to user operation, the two-way valve 227 will open its internal passage, connecting the pipeline between the second water inlet pump 226 and the steam generator boiler 204. At this time, the second water inlet pump 226 starts, pumping water from the source water tank 201 into the steam generator boiler 204 through the pipeline, providing the water source required for the steam generator boiler 204 to generate steam.

[0035] Water inlet closed state: When the water level in the steam generator boiler 204 reaches the set requirement and no further water intake is needed, or when the system is not in a steam generation state, the two-way valve 227 will close its internal passage, blocking the pipeline connection between the second water inlet pump 226 and the steam generator boiler 204. In this way, even if the second water inlet pump 226 continues to operate, it will not deliver water to the steam generator boiler 204, thus achieving flexible control over the water intake of the steam generator boiler 204, improving the system's flexibility and controllability, and avoiding unnecessary water intake operations.

[0036] In some embodiments, the soy milk brewing pipeline 205 includes at least two brewing branches, which in this embodiment are a first brewing branch 2051 and a second brewing branch 2052, used to brew different flavors of soy milk. For example, the first brewing branch 2051 is used to brew plain soy milk, and the second brewing branch 2052 is used to brew sweet soy milk. Correspondingly, the cold water supply pipeline 206 includes cold water supply branches that are respectively connected to each brewing branch, namely a first cold water supply branch 2061 and a second cold water supply branch 2062. The first cold water supply branch 2061 is connected to the first brewing branch 2051, and the second cold water supply branch 2062 is connected to the second brewing branch 2052.

[0037] In a further embodiment, the soy milk brewing pipeline 205 also includes a hot water direct drinking branch 2053 for providing direct drinking hot water. Correspondingly, the cold water supply pipeline 206 includes a third cold water supply branch 2063 connected to the hot water direct drinking branch 2053. The hot water direct drinking branch 2053 can directly deliver the hot water output from the hot water supply boiler 203 to the liquid outlet device 107 for direct drinking by the user. When the user needs direct drinking hot water at different temperatures, the on / off state and flow rate of the third cold water supply branch 2063 are controlled, so that the room temperature water in the source water tank 201 enters the hot water direct drinking branch 2053 through the third cold water supply branch 2063, mixes with the hot water, and adjusts the temperature of the direct drinking hot water.

[0038] In a further embodiment, both the hot water control valve 216 and the cold water control valve 217 are multi-way valves, such as four-way valves. Correspondingly, the soy milk brewing pipeline 205 is connected to the first brewing branch 2051, the second brewing branch 2052 and the hot water direct drinking branch 2053 through the hot water control valve 216, and the cold water supply pipeline 206 is connected to the first cold water supply branch 2061, the second cold water supply branch 2062 and the third cold water supply branch 2063 through the cold water control valve 217.

[0039] In this embodiment, the hot water control valve 216 serves as a key control component between the soy milk brewing pipeline 205 and the hot water supply boiler 203. It precisely controls the on / off supply and flow distribution of high-temperature hot water from the hot water supply boiler 203 to each branch of the soy milk brewing pipeline 205. The hot water control valve 216 can adopt a normally closed solenoid valve structure. Its valve body has a built-in multi-pass valve core, corresponding to the first brewing branch 2051, the second brewing branch 2052, and the hot water direct drinking branch 2053 of the soy milk brewing pipeline 205. The valve core is driven by an electromagnetic coil and can complete the passage switching within 0.1-0.3 seconds. The valve body is made of food-grade PPS material, withstanding high temperatures of 120℃ and water pressure of 10 bar, ensuring stability and safety in hot water supply environments. In the initial state, the hot water control valve 216 is fully closed, and all branches of the hot water supply boiler 203 and the soy milk brewing pipeline 205 are not connected, avoiding unnecessary consumption of hot water. In single-branch operation mode, such as when the user selects to make plain soy milk, the equipment control system sends a command to the hot water control valve 216, energizing the electromagnetic coil to generate magnetic force, driving the valve core to rotate to the conducting position of the first brewing branch 2051. At this time, the 95℃ hot water output from the hot water supply boiler 203 enters the first brewing branch 2051 through the valve cavity. The flow rate is controlled by the valve opening (via PWM pulse width modulation), for example, setting the flow rate to 150ml / min for 30 seconds to meet the hot water requirement for a single cup of soy milk. In multi-branch collaborative mode, for example, if a user simultaneously selects to make plain soy milk and direct drinking hot water, the control system, through timing control logic, first activates the first brewing branch 2051 (for 30 seconds). After it completes the hot water delivery, the valve core switches to the direct drinking hot water branch 2053, where hot water is delivered at a flow rate of 200ml / min for 10 seconds (outputting 200ml of 85℃ hot water). During this period, the built-in flow sensor monitors the water output parameters in real time. If the actual flow rate deviates from the set value by more than ±5%, the control system will immediately adjust the valve opening to compensate.

[0040] Meanwhile, the hot water control valve 216 also has an emergency shut-off mechanism. When the soy milk brewing pipeline 205 is blocked (such as when the sensor detects a sudden increase in pipeline pressure exceeding 5 bar), or when the equipment triggers water shortage or overheat protection, the hot water control valve 216 will shut off all passages within 50ms to cut off the hot water supply and prevent the risk of high-pressure hot water leakage or dry burning.

[0041] In this embodiment, the cold water control valve 217 is installed at the connection point between the cold water supply pipeline 206 and the soy milk brewing pipeline 205. It controls the delivery of room temperature water from the source water tank 201 to each brewing branch and the hot water direct drinking branch, achieving precise adjustment of the water temperature for soy milk brewing. The cold water control valve 217 can also be designed as a multi-channel solenoid valve, with three independently controlled outlet channels corresponding to the first cold water supply branch 2061, the second cold water supply branch 2062, and the third cold water supply branch 2063. Each channel is equipped with a flow metering orifice and a one-way shut-off diaphragm to ensure that the cold water flows in only one direction and the flow rate is stable. The valve response time is the same as that of the hot water control valve 216, and it can withstand a water temperature of 60℃ and a water pressure of 8 bar, meeting the requirements of room temperature water delivery. Taking the production of multigrain soy milk (requiring a water temperature of 75℃) as an example, the hot water supply boiler 203 outputs 95℃ hot water to the second brewing branch 2052. Simultaneously, the control system calculates the required cold water mixing ratio (95℃ hot water: 25℃ cold water = 3:1) and sends a command to the cold water control valve 217, activating the second cold water supply branch 2062. The cold water control valve 217 adjusts the cold water output in real time according to the hot water flow rate. For example, when the hot water flow rate is 120ml / min, the cold water flow rate is controlled at 40ml / min. The water is then evenly mixed via a Venturi mixer (installed at the junction of the second brewing branch 2052 and the second cold water supply branch 2062), ensuring that the mixed water temperature remains stable at 75℃±1℃.

[0042] When the first brewing branch 2051 (plain soy milk, 85℃) and the hot water direct drinking branch 2053 (60℃) operate simultaneously, the cold water control valve 217 is controlled through an independent channel. The first cold water supply branch 2061 outputs a cold water flow rate of 30ml / min (mixed with 120ml / min of 95℃ hot water); the third cold water supply branch 2063 outputs a cold water flow rate of 100ml / min (mixed with 100ml / min of 95℃ hot water). The valve cores of the two channels operate independently without interference, and closed-loop regulation is achieved through feedback data from their respective temperature sensors. If the first inlet pump 224 experiences an abnormal flow rate (e.g., the flow meter 223 detects an inlet flow rate below 50 ml / min), the cold water control valve 217 will simultaneously close all cold water channels to prevent water temperature runaway due to insufficient cold water supply. When the equipment stops working, the valve automatically resets to the fully closed state to prevent water in the source water tank 201 from flowing back through the cold water pipeline. Hot water control valve 216 and cold water control valve 217 are linked via CAN bus communication of the control system. For example, when the hot water direct drinking branch 2053 is working, the timing deviation of the two valves is controlled within ±50ms to ensure timely water temperature adjustment. Simultaneously, all valves are equipped with a manual emergency operation mechanism, allowing specific passages to be opened via a mechanical knob in the event of a power outage, improving the emergency availability of the equipment.

[0043] In some embodiments, the water system 200 further includes a wastewater tank 228 for receiving water discharged from the drain outlet 202. Of course, the wastewater tank 228 can be installed independently of the coffee machine, with the drain outlet 202 located on the outer casing of the coffee machine, and the wastewater tank 228 located at the bottom of the drain outlet 202. When the wastewater tank 228 is full, it can be emptied at any time.

[0044] It is understood that in some embodiments, the overflow port of the source water tank 201 is connected to the drain port 202 through the overflow pipe 211 to prevent the source water tank 201 from overflowing.

[0045] It is understood that in some embodiments, the first inlet pump 224 is preferably a gear pump to ensure a stable water flow rate, pumping water from the source water tank 201 into the hot water supply boiler 203.

[0046] Example 2: Please see Figure 2 This embodiment provides a coffee maker 100, including a body on which an extraction device 104 and a brewing device are mounted. The extraction device 104 is used to extract coffee powder with hot water to obtain coffee liquid, and the brewing device is used to brew soy milk powder with hot water to obtain soy milk. The body is equipped with the water circuit system 200 of the coffee maker described in Embodiment 1.

[0047] Specifically, the machine body is equipped with a coffee powder dispensing box 101, a first soy milk powder dispensing box 102, and a second soy milk powder dispensing box 103, which are used to store coffee powder and soy milk powder of different flavors, respectively. The extraction device 104 is connected to the coffee extraction pipeline 207, providing hot water for coffee extraction. The extracted coffee liquid in the extraction device 104 is connected to the dispensing device 107 through a dispensing pipe and flows out into a cup through the dispensing nozzle on the dispensing device 107. Steam in the steam supply pipeline 208 is connected to the milk liquid by gas to form milk foam, which is then output to the coffee liquid through the dispensing device 107, completing the coffee preparation.

[0048] The brewing device includes a first stirrer 105 and a second stirrer 106, corresponding to the first soy milk powder dispensing box 102 and the second soy milk powder dispensing box 103, respectively. After the soy milk powder enters the stirrer, hot water is supplied through the soy milk brewing pipe 205 for stirring. The stirred soy milk liquid flows out into the cup through the dispensing nozzle on the dispensing device 107. By setting multiple stirrers and corresponding brewing branches, different flavors of soy milk can be made simultaneously, meeting the diverse needs of users.

[0049] The overall workflow of the coffee machine 100 in this embodiment is as follows: When a user needs to make coffee, the coffee powder dispenser 101 delivers coffee powder to the extraction device 104. Simultaneously, the hot water boiler pump 224 starts, delivering water from the source water tank 201 to the hot water supply boiler 203 via the hot water boiler inlet pipe 214. The hot water supply boiler 203 heats the water to 90℃-94℃. The heated hot water is then delivered to the extraction device 104 via the coffee extraction pipe 207, where it mixes with the coffee powder to complete the extraction. The extracted coffee liquid flows out into a cup via the dispensing device 107. If the user needs to make milk coffee, the high-temperature steam generated by the steam generator 204 is introduced into the milk liquid via the steam supply pipe 208, frothed into milk, and then output to the coffee liquid via the dispensing device 107. When a user needs to make a certain flavor of soy milk, the corresponding soy milk powder dispensing box (e.g., the first soy milk powder dispensing box 102) delivers the soy milk powder to the corresponding mixer (e.g., the first mixer 105). Hot water supplied by the hot water supply boiler 203 flows into the mixer through the corresponding brewing branch (e.g., the first brewing branch 2051). Simultaneously, the cold water supply pipe 206 delivers cold water to the brewing branch through the corresponding cold water supply branch (e.g., the first cold water supply branch 2061), adjusting the water temperature to a suitable temperature for brewing the desired flavor of soy milk. After the hot water and soy milk powder are thoroughly mixed in the mixer, soy milk liquid is formed and flows out into a cup through the liquid dispensing device 107. When a user needs hot water for direct drinking, the hot water supplied by the hot water supply boiler 203 is delivered to the liquid outlet device 107 through the hot water direct drinking branch 2053. If the water temperature needs to be adjusted, the cold water supply pipeline 206 delivers cold water to the hot water direct drinking branch 2053 through the third cold water supply branch 2063, and after mixing, hot water at a suitable temperature is formed. Throughout the entire operation, the safety pressure relief subsystem constantly monitors the pressure inside the hot water supply boiler 203 and the steam generating boiler 204, and releases pressure in a timely manner when the pressure exceeds the safe value; the waste water return subsystem recovers the generated waste water to the waste water tank 228 to ensure the safe, stable and environmentally friendly operation of the equipment. In summary, the water system and coffee maker provided in this embodiment, through reasonable pipeline design and component configuration, realize the function of making various beverages such as coffee, soy milk, milk coffee, and direct drinking hot water. It has the advantages of safety and reliability, high water resource utilization, and good beverage quality, and can meet consumers' needs for diversified beverage making.

[0050] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A water system for a soy milk coffee maker, comprising a source water tank, a hot water supply boiler, a soy milk brewing pipeline, and a safety pressure relief subsystem, wherein the hot water supply boiler is connected to the soy milk brewing pipeline via a hot water control valve; characterized in that, Also includes: A coffee making subsystem and a steam generating boiler, the coffee making subsystem including a coffee extraction pipeline and a steam supply pipeline, the coffee extraction pipeline and the soy milk brewing pipeline being fluidly connected to the hot water supply boiler, and the steam supply pipeline being connected to the steam generating boiler to provide high-temperature steam for making coffee; The safety pressure relief subsystem includes a hot water pressure relief pipeline and a steam pressure relief pipeline. The water system has at least one drain outlet. The hot water supply boiler and the steam generating boiler are respectively connected to the drain outlet through the hot water pressure relief pipeline and the steam pressure relief pipeline.

2. The water system for the coffee machine according to claim 1, characterized in that, It also includes a cold water supply pipeline connected to the source water tank, and the cold water supply pipeline is connected to the soy milk brewing pipeline through a cold water control valve; the hot water supply boiler's inlet pipeline and the cold water supply pipeline are both connected to the source water tank via a first inlet pump.

3. The water system for the coffee machine according to claim 1 or 2, characterized in that, The hot water supply boiler has a first safety valve connected to its inlet pipe. The first safety valve is connected to the drain outlet so that when the inlet pressure of the hot water supply boiler exceeds a set threshold, its inlet pipe and drain outlet are connected.

4. The water system for the coffee machine according to claim 3, characterized in that, The inlet pipe of the hot water supply boiler is connected to the hot water supply boiler and the first safety valve via a three-way pipe.

5. The water system for the coffee machine according to claim 1 or 2, characterized in that, The steam generator boiler has a second safety valve connected to its inlet pipe. The second safety valve is connected to the drain outlet so that when the inlet pressure of the steam generator boiler exceeds a set threshold, its inlet pipe and drain outlet are connected.

6. The water system for the coffee machine according to claim 5, characterized in that, The water inlet pipe of the steam generating boiler is connected to the steam generating boiler and the second safety valve via a three-way pipe.

7. The water system for the coffee machine according to claim 6, characterized in that, The steam generating boiler is connected to the source water tank via a second inlet pump, and the second safety valve is connected to the outlet pipe of the second inlet pump.

8. The water system for the coffee machine according to claim 2, characterized in that, The inlet side of the first water pump is connected to the source water tank via a flow meter, and the outlet side is connected to the inlet pipe of the hot water supply boiler via a one-way valve.

9. The water system for the coffee machine according to claim 1, characterized in that, The hot water supply boiler is connected to the coffee extraction pipeline and the hot water pressure relief pipeline respectively through a first three-way valve; the steam generating boiler is connected to the steam supply pipeline and the steam pressure relief pipeline respectively through a second three-way valve.

10. A coffee bean machine, comprising a body, characterized in that, The machine body is equipped with an extraction device and a brewing device. The extraction device is used to extract coffee powder with hot water to obtain coffee liquid, and the brewing device is used to brew soy milk powder with hot water to obtain soy milk. The machine body is provided with a water circuit system for the coffee machine according to any one of claims 1 to 9.

Images