Coffee machine

Abstract

The utility model relates to a coffee machine and belongs to the field of electric appliances. The utility model relates to a coffee machine, which comprises a water pump, a water pump liquid outlet, a water pump liquid inlet and a water pump liquid outlet, the pressure regulating valve is provided with a valve liquid inlet, and the valve liquid inlet of the pressure regulating valve is communicated with the water pump liquid outlet of the water pump; the boiler assembly is provided with a heating cavity, a boiler liquid inlet and a boiler liquid outlet which are communicated with the heating cavity are formed in the boiler assembly, the boiler assembly is provided with a liquid outlet channel, the liquid outlet channel penetrates through the heating cavity, and the boiler liquid inlet is communicated with the valve liquid outlet; and the pressure detection assembly communicates with the boiler liquid outlet and the liquid inlet end of the liquid outlet channel, and the liquid outlet end of the liquid outlet channel is used for supplying liquid to a brewing assembly. According to the coffee machine, a user can manually adjust a pressure regulating valve and control the pressure in the coffee machine through multi-section pressure regulation, and the playability of the coffee machine is improved.

Description

Technical Field

[0001] The utility model relates to the field of electrical appliances, in particular to a coffee machine. Background Art

[0002] Although social economy has developed and people's living standards have improved, the pressure of life and work has increased. Therefore, people often need a cup of coffee to refresh their minds and relax their bodies and minds. However, users of coffee machines on the market cannot manually adjust the internal hydraulic pressure in multiple stages, resulting in the coffee produced not meeting their own taste, which makes the user experience bad. Utility Model Content

[0003] Based on this, it is necessary to provide a coffee machine to address the problem that the internal hydraulic pressure of the coffee machine cannot be adjusted manually and in multiple stages.

[0004] A coffee machine, comprising: a water pump, the water pump being provided with a water pump outlet; a pressure regulating valve, the pressure regulating valve being provided with a valve inlet and a valve outlet, the valve inlet of the pressure regulating valve being communicated with the water pump outlet of the water pump; a boiler assembly, the boiler assembly being provided with a heating chamber, the boiler assembly being provided with a boiler inlet and a boiler outlet communicated with the heating chamber, the boiler assembly being provided with a liquid outlet channel, the liquid outlet channel running through the heating chamber, the boiler inlet being communicated with the valve outlet; a pressure detection assembly, the pressure detection assembly being communicated with the boiler outlet and the liquid inlet end of the liquid outlet channel respectively, the liquid outlet end of the liquid outlet channel being used to supply liquid to the brewing assembly.

[0005] The present application discloses a coffee machine. By connecting a water pump outlet provided by a water pump with a valve inlet provided by a pressure regulating valve, the water pump provides a water source and water pressure for making coffee, which is used to realize the process of extracting coffee, and continuously supplies water to the heating and extraction system to ensure the normal operation of the coffee machine. In addition, the water pump water is passed to the pressure regulating valve, so that the user can control the water pressure inside the coffee machine. Even if the water supply pressure fluctuates, the pressure regulating valve can ensure that the working pressure inside the coffee machine remains relatively stable, and at the same time, it can prevent excessive pressure from causing damage to the components inside the coffee machine, such as fragile components such as water pipes and extraction heads, thereby ensuring the safe operation of the coffee machine. The water flow after pressure regulation flows out from the valve outlet, and flows from the boiler inlet to the heating chamber provided inside the boiler assembly. After being heated in the heating chamber, it provides a hot water source for brewing coffee, ensuring the coffee making process. At the same time, the boiler assembly can accurately control the water temperature, which is crucial to the extraction quality of coffee. Different coffee beans and roasting degrees have different requirements for water temperature, and the boiler assembly can provide a stable and adjustable temperature environment. The heated water flows out from the boiler outlet and passes through the pressure detection component, and finally enters the brewing component from the outlet channel to achieve the purpose of brewing coffee. The pressure detection component can ensure that the pressure of the coffee extraction process is maintained within a safe and effective range, preventing the internal pressure of the coffee machine from being too high or too low, and can effectively protect the safety of the machine and the user. At the same time, when the coffee machine has performance problems or failures, the data from the pressure detection component can help technicians quickly diagnose the problem and improve the efficiency of maintenance.

[0006] In one embodiment, the pressure detection assembly includes a three-way solenoid valve and a pressure gauge, the three-way solenoid valve is provided with a liquid inlet and a liquid outlet, the liquid inlet of the three-way solenoid valve and the boiler liquid outlet of the boiler assembly are connected via a first pipe, the liquid outlet of the three-way solenoid valve and the liquid inlet end of the liquid outlet channel of the boiler assembly are connected via a second pipe, and the pressure gauge is connected to the second pipe. The liquid inlet provided by the three-way solenoid valve is connected to the boiler liquid outlet of the boiler assembly by a first pipe, and the liquid outlet provided by the three-way solenoid valve is connected to the liquid inlet end of the liquid outlet channel provided by the boiler assembly by a second pipe. At the same time, the pressure gauge is arranged on the second pipe, thereby ensuring the fluidity and flexibility of the liquid inside the coffee machine. After being heated by the boiler assembly, the water flows out from the boiler liquid outlet, passes through the liquid inlet of the three-way solenoid valve, and flows to the pressure gauge and the liquid outlet channel at the same time. This structure is that, on the one hand, the three-way solenoid valve can accurately control the direction and on-off of the water flow, effectively prevent the backflow of hot water, ensure the normal operation and safety of the system, and avoid the damage and unstable working state of the boiler assembly caused by the backflow. Moreover, after the water flows out of the three-way solenoid valve, it enters the boiler assembly and the pressure gauge respectively. The hot water flowing back to the boiler assembly is used to brew coffee. The liquid in the flow channel pressure gauge allows the user to observe the current pressure situation inside the coffee machine by observing the pointer of the pressure gauge, thereby ensuring the safe use of the coffee machine and extending the service life of the coffee machine.

[0007] In one embodiment, the pressure regulating valve includes a liquid inlet block, a liquid outlet block and a pressure-changing valve body, the liquid inlet block and the liquid outlet block are arranged on the pressure-changing valve body, the liquid inlet block is provided with the valve liquid inlet, the liquid outlet block is provided with the valve liquid outlet, the pressure-changing valve body is provided with a liquid passage, and the liquid passage, the valve liquid inlet and the valve liquid outlet are connected in sequence. By arranging the liquid inlet block and the liquid outlet block on the pressure-changing valve body, and the liquid inlet block is provided with a valve liquid inlet, and the liquid outlet block is provided with a valve liquid outlet, the liquid passage provided on the pressure-changing valve body is connected with the valve liquid inlet and the valve liquid outlet, structural support for liquid inlet and liquid outlet is provided for the pressure-changing valve, so that liquid can enter the liquid passage from the valve liquid inlet according to a predetermined channel, and the pressure-changing valve body is used to regulate the water flow. Users can accurately adjust the water pressure according to their preferences and the characteristics of the coffee beans, so that the coffee powder can interact with the water in the best way, thereby optimizing the extraction effect of the coffee and extracting a richer and more balanced flavor and aroma. The water flow after pressure regulation flows out from the valve outlet, reducing resistance and turbulence in the flow process, improving the efficiency and stability of liquid transmission, and allowing the water flow inside the coffee machine to be stably regulated through the pressure-regulating valve, ensuring that the extraction pressure of each cup of coffee can remain stable and the consistency of coffee quality is guaranteed.

[0008] In one embodiment, the pressure-changing valve body includes a pressure-changing valve body, a first pressure relief valve, a second pressure relief valve, a pressure-changing valve cover and a pressure-changing valve stem assembly, the pressure-changing valve body is provided with the liquid passage, the first pressure relief valve, the second pressure relief valve and the pressure-changing valve cover are arranged on the pressure-changing valve body, the pressure-changing valve stem assembly is passed through the pressure-changing valve cover, and the pressure-changing valve stem assembly is partially located in the liquid passage. By arranging the first pressure relief valve, the second pressure relief valve and the pressure-changing valve cover on the pressure-changing valve body and sealing the pressure-changing valve body with the pressure-changing valve cover, the components inside the pressure-changing valve body are protected from external dust, impurities and the like invading the interior, thereby ensuring its normal operation. At the same time, it also effectively prevents liquid leakage inside the pressure-changing valve body and maintains the pressure stability of the coffee machine. Since the pressure-changing valve stem assembly passes through the pressure-changing valve cover and is partially located in the liquid passage provided in the pressure-changing valve body, the user can adjust the position of the pressure-changing valve stem assembly and control the coffee machine hydraulically in combination with the first pressure relief valve and the second pressure relief valve to ensure the normal pressure inside the coffee machine, ensure the stable operation of the coffee machine, avoid affecting the coffee quality due to pressure fluctuations, and even avoid damage to the internal components of the coffee machine due to excessive pressure, thereby effectively extending the service life of the coffee machine.

[0009] In one embodiment, the variable pressure valve stem assembly has at least a first position and a second position relative to the variable pressure valve body. When the variable pressure valve stem assembly is in the first position, the liquid passage is connected to the first pressure relief valve. When the variable pressure valve stem assembly is in the second position, the liquid passage is connected to both the first pressure relief valve and the second pressure relief valve. By changing the position of the variable pressure valve stem assembly to adjust the internal hydraulic pressure of the coffee machine, a stable process of coffee machine extraction is achieved, providing a key control means for making high-quality and personalized coffee. When the variable pressure valve stem assembly is in the first position, the liquid passage is connected to the first pressure relief valve. At this time, the liquid enters the first pressure relief valve from the liquid passage and is discharged from the first pressure relief valve, achieving a larger pressure relief process. When the variable pressure valve stem assembly is in the second position, the liquid passage is connected to both the first pressure relief valve and the second pressure relief valve. At this time, the liquid is discharged from the second pressure relief valve with a lower pressure. Multi-stage pressure adjustment allows the coffee machine to adapt to a variety of brewing methods, thereby increasing the layering and complexity of the coffee, while increasing the playability of the machine, allowing users to customize the coffee extraction pressure according to their personal taste, thereby obtaining a coffee flavor that suits their preferences, enhancing the user experience and improving market competitiveness.

[0010] In one embodiment, the pressure-changing valve stem assembly includes a valve stem and a handle, wherein the valve stem passes through the pressure-changing valve cover, the valve stem is partially built into the pressure-changing valve body, and the handle is arranged on the valve stem, and the handle can drive the valve stem to move. By passing the valve stem through the pressure-changing valve cover and partially built into the pressure-changing valve body, and the handle is arranged on the valve stem, the user controls the movement of the valve stem in the liquid passage of the pressure-changing valve body by turning the handle, thereby realizing the opening and closing of different pressure relief valves. The operation is simple and convenient for user participation. The user can turn the handle in real time to adjust during the coffee making process, and timely optimize the pressure according to the observed coffee outflow, color, aroma, etc., so as to obtain the ideal coffee quality and meet personalized needs. This structure provides users with a direct way to participate in and master the coffee making process, increasing the fun and sense of achievement of the operation. The existence of the variable pressure valve stem assembly allows the user to achieve multi-stage pressure changes during the coffee extraction process to achieve a more complex and personalized coffee extraction effect. At the same time, it helps to balance and stabilize the pressure inside the coffee machine, avoiding pressure fluctuations on the consistency of coffee extraction. It ensures that each cup of coffee is made under the same pressure conditions, thereby improving the stability of coffee quality.

[0011] In one embodiment, the pressure-changing valve cover comprises a valve cover body, a first sealing ring and a second sealing ring, wherein the valve cover body is arranged on the pressure-changing valve body, the first sealing ring is arranged on the valve cover body and / or the pressure-changing valve body, and the second sealing ring is arranged on the valve cover body and / or the valve stem. By arranging the valve cover body on the pressure-changing valve body and arranging the first sealing ring provided on the pressure-changing valve cover in the gap between the valve cover body and the pressure-changing valve body, it is ensured that the liquid inside the pressure-changing valve body will not leak, so that the pressure regulating valve can more accurately control and adjust the internal pressure, and at the same time, the first sealing ring can reduce the wear of the valve cover body and the pressure-changing valve body during contact and relative movement, and reduce the friction loss between the components. The second sealing ring provided on the pressure-changing valve cover is arranged between the valve cover body and the valve stem, which can effectively prevent the pressure from escaping from around the valve stem and causing pressure leakage. At the same time, the second sealing ring plays a certain role in lubrication and buffering, reduces the friction and wear generated when the valve cover body and the valve stem move relative to each other, and prolongs the service life of the pressure-changing valve stem assembly. The two sealing rings effectively ensure the stability of the pressure inside the pressure regulating valve, thereby providing stable and appropriate pressure conditions for the coffee machine to extract coffee and ensuring the smooth progress of the coffee extraction process.

[0012] In one embodiment, the boiler assembly includes a shell, a heating tube and a return tube. The shell is provided with the heating chamber. The heating tube is arranged on the shell and located in the heating chamber. The return tube is arranged in the shell. The return tube runs through the heating chamber. The return tube is provided with the liquid outlet channel. The heating chamber is arranged inside the shell of the boiler assembly, and the heating tube is placed inside the heating chamber. The liquid in the boiler assembly is heated to a suitable temperature by the heating tube. The suitable temperature can stimulate the aroma of the coffee and prevent the sourness or bitterness of the coffee from affecting the experience. The liquid is then sent to the coffee brewing position through the return tube arranged in the shell, and finally a cup of fragrant and delicious hot coffee is made for the user. The heating chamber also has the function of storing hot water, ensuring that there is enough hot water to make multiple cups of coffee at the same time, ensuring the continuity and stability of coffee making.

[0013] In one of the embodiments, the boiler assembly further includes a locking assembly, which is arranged on the shell and located on the side of the liquid outlet end of the liquid outlet channel, and further includes a brewing assembly, which is matched with the locking assembly. By arranging the locking assembly on the shell and located on the side of the liquid outlet end of the liquid outlet channel, and matching the brewing assembly with the locking assembly, it is ensured that the brewing assembly can be firmly fixed in the specified position during operation, so that the liquid outlet channel can deliver the liquid to the brewing assembly, and the displacement or shaking of the brewing assembly due to machine vibration, pressure change or other external factors can be effectively prevented, thereby ensuring the stability and consistency of the brewing process and ensuring the normal progress of coffee making. At the same time, the brewing assembly can be quickly and conveniently disassembled by operating the locking assembly, which improves the maintainability and convenience of use of the equipment.

[0014] In one embodiment, a pressure relief component is further included, and the three-way solenoid valve is provided with a pressure relief port, and the pressure relief component is arranged on the three-way solenoid valve and located at the pressure relief port. By arranging the pressure relief component on the three-way solenoid valve and being located at the pressure relief port of the solenoid valve, the coffee machine can be further relieved of pressure, thereby avoiding excessive pressure of the liquid flowing back to the boiler, which affects the final product of the coffee, and even the high-temperature liquid may threaten the personal safety of the user. The pressure relief component is another layer of protection for the coffee machine, which enables the coffee machine to maintain stable performance under various working conditions, reduces equipment failures and downtime caused by pressure problems, and improves the reliability and use efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a first cross-sectional view of a coffee machine;

[0016] Figure 2 is a second cross-sectional view of the coffee machine;

[0017] Figure 3is a first cross-sectional view of the pressure regulating valve;

[0018] Figure 4 is a cross-sectional view of a boiler assembly;

[0019] Figure 5 is a second cross-sectional view of the pressure regulating valve;

[0020] Figure 6 It is the third cross-sectional view of the pressure regulating valve.

[0021] The corresponding relationship between the reference numerals and the component names is as follows:

[0022] 1 water pump, 101 water pump outlet;

[0023] 2 pressure regulating valve, 21 liquid inlet block, 22 liquid outlet block, 23 pressure changing valve body, 231 pressure changing valve body, 232 first pressure relief valve, 233 second pressure relief valve, 234 pressure changing valve cover, 2341 valve cover body, 2342 first sealing ring, 2343 second sealing ring, 235 pressure changing valve stem assembly, 2351 valve stem, 2352 handle, 201 valve liquid inlet, 202 valve liquid outlet, 203 liquid passage;

[0024] 3 boiler assembly, 31 shell, 32 heating pipe, 33 reflux pipe, 301 boiler liquid inlet, 302 boiler liquid outlet, 303 heating chamber, 304 liquid outlet channel;

[0025] 4 pressure detection assembly, 41 three-way solenoid valve, 42 pressure gauge, 401 liquid inlet, 402 liquid outlet, 403 pressure relief port;

[0026] 5 brewing components;

[0027] 6. Pressure relief assembly. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0030] The coffee machines according to some embodiments of the present invention will be described below with reference to the accompanying drawings.

[0031] Example 1

[0032] like Figures 1 to 6As shown, this embodiment discloses a coffee machine, comprising: a water pump 1, the water pump 1 is provided with a water pump outlet 101; a pressure regulating valve 2, the pressure regulating valve 2 is provided with a valve inlet 201 and a valve outlet 202, the valve inlet 201 of the pressure regulating valve 2 is communicated with the water pump outlet 101 of the water pump 1; a boiler assembly 3, the boiler assembly 3 is provided with a heating chamber 303, the boiler assembly 3 is provided with a boiler inlet 301 and a boiler outlet 302 communicated with the heating chamber 303, the boiler assembly 3 is provided with a liquid outlet channel 304, the liquid outlet channel 304 runs through the heating chamber 303, the boiler inlet 301 is communicated with the valve outlet 202; a pressure detection assembly 4, the pressure detection assembly 4 is respectively communicated with the boiler outlet 302 and the liquid inlet end of the liquid outlet channel 304, and the liquid outlet end of the liquid outlet channel 304 is used to supply liquid to the brewing assembly 5.

[0033] The present application discloses a coffee machine, which connects a water pump outlet 101 provided by a water pump 1 with a valve inlet 201 provided by a pressure regulating valve 2. On the one hand, the water pump 1 provides a water source and water pressure for making coffee, which is used to realize the process of extracting coffee, and at the same time continuously supplies water to the heating and extraction system to ensure the normal operation of the coffee machine. Furthermore, the water from the water pump 1 is passed to the pressure regulating valve 2, so that the user can control the water pressure inside the coffee machine. Even if the water supply pressure fluctuates, the pressure regulating valve 2 can ensure that the working pressure inside the coffee machine remains relatively stable, and at the same time, it can prevent excessive pressure from causing damage to the components inside the coffee machine, such as fragile parts such as water pipes and extraction heads, thereby ensuring the safe operation of the coffee machine. The water after pressure regulation flows out from the valve outlet 202, and flows from the boiler inlet 301 to the heating chamber 303 provided inside the boiler assembly 3. After being heated in the heating chamber 303, it provides a hot water source for brewing coffee, ensuring the coffee making process. At the same time, the boiler assembly 3 can accurately control the water temperature, which is crucial to the extraction quality of coffee. Different coffee beans and roasting degrees have different requirements for water temperature. The boiler assembly 3 can provide a stable and adjustable temperature environment. The heated water flows out from the boiler outlet 302 and passes through the pressure detection assembly 4, and finally enters the brewing assembly 5 from the liquid outlet channel 304 to achieve the purpose of brewing coffee. The pressure detection assembly 4 can ensure that the pressure of the coffee extraction process is maintained within a safe and effective range, preventing the internal pressure of the coffee machine from being too high or too low, and can effectively ensure the safety of the machine and the user. At the same time, when the coffee machine has performance problems or failures, the data of the pressure detection assembly 4 can help technicians quickly diagnose the problem and improve the efficiency of maintenance.

[0034] like Figure 1 and Figure 2As shown, in addition to the features of the above embodiments, this embodiment further defines that: the pressure detection component 4 includes a three-way solenoid valve 41 and a pressure gauge 42, the three-way solenoid valve 41 is provided with a liquid inlet 401 and a liquid outlet 402, the liquid inlet 401 of the three-way solenoid valve 41 is connected to the boiler liquid outlet 302 of the boiler assembly 3 through a first pipeline, the liquid outlet 402 of the three-way solenoid valve 41 is connected to the liquid inlet end of the liquid outlet channel 304 of the boiler assembly 3 through a second pipeline, and the pressure gauge 42 is connected to the second pipeline. The liquid inlet 401 provided by the three-way solenoid valve 41 is connected to the boiler liquid outlet 302 of the boiler assembly 3 by means of a first pipe, and the liquid outlet 402 provided by the three-way solenoid valve 41 is connected to the liquid inlet end of the liquid outlet channel 304 provided by the boiler assembly 3 by means of a second pipe. At the same time, the pressure gauge 42 is arranged on the second pipe, thereby ensuring the fluidity and flexibility of the liquid inside the coffee machine. After being heated by the boiler assembly 3, the water flows out from the boiler liquid outlet 302, passes through the liquid inlet 401 of the three-way solenoid valve 41, and flows to the pressure gauge 42 and the liquid outlet channel 304 at the same time. This structure is that on one hand, The three-way solenoid valve 41 can accurately control the direction and on-off of the water flow, effectively prevent the backflow of hot water, ensure the normal operation and safety of the system, and avoid the damage and unstable working state of the boiler assembly 3 caused by the backflow. Moreover, after the water flows out of the three-way solenoid valve 41, it enters the boiler assembly 3 and the pressure gauge 42 respectively. The hot water flowing back to the boiler assembly 3 is used to brew coffee. The liquid in the flow channel pressure gauge 42 allows the user to observe the current pressure situation inside the coffee machine by observing the pointer of the pressure gauge 42, thereby ensuring the safe use of the coffee machine and extending the service life of the coffee machine.

[0035] like Figure 2 and Figure 3As shown, in addition to the features of the above-mentioned embodiments, this embodiment further defines that: the pressure regulating valve 2 includes a liquid inlet block 21, a liquid outlet block 22 and a pressure-changing valve body 23, the liquid inlet block 21 and the liquid outlet block 22 are arranged on the pressure-changing valve body 23, the liquid inlet block 21 is provided with a valve liquid inlet 201, the liquid outlet block 22 is provided with a valve liquid outlet 202, the pressure-changing valve body 23 is provided with a liquid passage 203, and the liquid passage 203, the valve liquid inlet 201 and the valve liquid outlet 202 are connected in sequence. By arranging the liquid inlet block 21 and the liquid outlet block 22 on the pressure-changing valve body 23, and the liquid inlet block 21 is provided with a valve liquid inlet 201, and the liquid outlet block 22 is provided with a valve liquid outlet 202, the pressure-changing valve body 23 is provided with a liquid passage 203 which is connected with the valve liquid inlet 201 and the valve liquid outlet 202, a structural support for liquid inlet and liquid outlet is provided for the pressure-regulating valve 2, so that the liquid can enter the liquid passage 203 from the valve liquid inlet 201 according to a predetermined channel, and the pressure-changing valve body 23 is used to regulate the water flow, and the user can adjust the pressure according to his own preferences. The water pressure is precisely adjusted according to the characteristics of coffee beans, so that the coffee powder can interact with water in the best way, thereby optimizing the extraction effect of the coffee and extracting a richer and more balanced flavor and aroma. The water flow after pressure adjustment then flows out from the valve liquid outlet 202, reducing the resistance and turbulence in the flow process, improving the efficiency and stability of liquid transmission, so that the water flow inside the coffee machine can be stably regulated through the pressure regulating valve 2, ensuring that the extraction pressure of each cup of coffee can remain stable, and ensuring the consistency of coffee quality.

[0036] like Figure 3 and Figure 5As shown, in addition to the features of the above embodiments, this embodiment further defines: the pressure-changing valve body 23 includes a pressure-changing valve body 231, a first pressure relief valve 232, a second pressure relief valve 233, a pressure-changing valve cover 234 and a pressure-changing valve stem assembly 235, the pressure-changing valve body 231 is provided with a liquid passage 203, the first pressure relief valve 232, the second pressure relief valve 233 and the pressure-changing valve cover 234 are arranged on the pressure-changing valve body 231, the pressure-changing valve stem assembly 235 is penetrated by the pressure-changing valve cover 234, and the pressure-changing valve stem assembly 235 is partially located in the liquid passage 203. By arranging the first pressure relief valve 232, the second pressure relief valve 233 and the pressure changing valve cover 234 on the pressure changing valve body 231, the pressure changing valve cover 234 is used to seal the pressure changing valve body 231, so as to protect the components inside the pressure changing valve body 231 from external dust, impurities and the like invading the interior, thereby ensuring its normal operation, and at the same time effectively preventing the leakage of liquid inside the pressure changing valve body 231, thereby maintaining the pressure stability of the coffee machine. Since the pressure changing valve stem assembly 235 passes through the pressure changing valve cover 234 and is partially located in the liquid passage 203 provided in the pressure changing valve body 231, the user can adjust the position of the pressure changing valve stem assembly 235, and hydraulically control the coffee machine in combination with the first pressure relief valve 232 and the second pressure relief valve 233, thereby ensuring the normal pressure inside the coffee machine, ensuring the stable operation of the coffee machine, avoiding the influence of coffee quality due to pressure fluctuation, and even avoiding the damage of internal components of the coffee machine due to excessive pressure, thereby effectively extending the service life of the coffee machine.

[0037] like Figure 3 and Figure 5As shown, in addition to the features of the above embodiment, this embodiment further defines that: the pressure-changing valve stem assembly 235 has at least a first position and a second position relative to the pressure-changing valve body 231, when the pressure-changing valve stem assembly 235 is in the first position, the liquid passage 203 is connected to the first pressure relief valve 232, and when the pressure-changing valve stem assembly 235 is in the second position, the liquid passage 203 is connected to both the first pressure relief valve 232 and the second pressure relief valve 233. By changing the position of the pressure-changing valve stem assembly 235 to adjust the internal hydraulic pressure of the coffee machine, a stable extraction process of the coffee machine is achieved, providing a key control means for making high-quality and personalized coffee. When the variable pressure valve stem assembly 235 is in the first position, the liquid passage 203 is connected with the first pressure relief valve 232, and the liquid enters the first pressure relief valve 232 from the liquid passage 203 and is discharged from the first pressure relief valve 232, thus achieving a relatively large pressure relief process. When the variable pressure valve stem assembly 235 is in the second position, the liquid passage 203 is connected with both the first pressure relief valve 232 and the second pressure relief valve 233, and the liquid is discharged from the second pressure relief valve 233 with a relatively small pressure. The multi-stage pressure adjustment can make the coffee machine adapt to a variety of brewing methods, thereby increasing the layering and complexity of the coffee, and at the same time increasing the playability of the machine, allowing users to customize the extraction pressure of the coffee according to their personal tastes, thereby obtaining a coffee flavor that suits their preferences, thereby improving the user experience and the market competitiveness.

[0038] like Figure 3 and Figure 5 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the pressure-changing valve stem assembly 235 includes a valve stem 2351 and a handle 2352, the valve stem 2351 passes through the pressure-changing valve cover 234, the valve stem 2351 is partially built into the pressure-changing valve body 231, and the handle 2352 is arranged on the valve stem 2351, and the handle 2352 can drive the valve stem 2351 to move. By passing the valve stem 2351 through the pressure-changing valve cover 234 and partially built into the pressure-changing valve body 231, and the handle 2352 is arranged on the valve stem 2351, the user controls the valve stem 2351 to move in the liquid passage 203 of the pressure-changing valve body 231 by turning the handle 2352, so as to realize the opening and closing of different pressure relief valves, and the operation is simple and convenient for user participation. The user can turn the handle 2352 in real time during the coffee making process to adjust, and timely optimize the pressure according to the observed coffee outflow, color and aroma, etc., so as to obtain ideal coffee quality and meet personalized needs. This structure provides a direct way for users to participate in and master the coffee making process, increasing the fun and sense of achievement of the operation. The existence of the variable pressure valve stem assembly 235 allows the user to achieve multi-stage pressure changes during the coffee extraction process to achieve a more complex and personalized coffee extraction effect, while helping to balance and stabilize the pressure inside the coffee machine, avoiding the impact of pressure fluctuations on the consistency of coffee extraction, ensuring that each cup of coffee is made under the same pressure conditions, and improving the stability of coffee quality.

[0039] like Figure 5 and Figure 6 As shown, in addition to the features of the above embodiments, this embodiment further defines: the pressure-changing valve cover 234 includes a valve cover body 2341, a first sealing ring 2342 and a second sealing ring 2343, the valve cover body 2341 is arranged on the pressure-changing valve body 231, the first sealing ring 2342 is arranged on the valve cover body 2341 and / or the pressure-changing valve body 231, and the second sealing ring 2343 is arranged on the valve cover body 2341 and / or the valve stem 2351. By setting the valve cover body 2341 on the pressure-changing valve body 231, and setting the first sealing ring 2342 provided on the pressure-changing valve cover 234 in the gap between the valve cover body 2341 and the pressure-changing valve body 231, it is ensured that the liquid inside the pressure-changing valve body 231 will not leak, so that the pressure regulating valve 2 can more accurately control and adjust the internal pressure. At the same time, the first sealing ring 2342 can reduce the wear of the valve cover body 2341 and the pressure-changing valve body 231 during contact and relative movement, and reduce the friction loss between the components. The second sealing ring 2343 provided on the pressure-changing valve cover 234 is set between the valve cover body 2341 and the valve stem 2351, which can effectively prevent the pressure from escaping from around the valve stem 2351 and causing pressure leakage. At the same time, the second sealing ring 2343 plays a certain lubricating and buffering role, reduces the friction and wear generated when the valve cover body 2341 and the valve stem 2351 move relative to each other, and extends the service life of the pressure-changing valve stem assembly 235. The two sealing rings effectively ensure that the pressure inside the pressure regulating valve 2 is stable, thereby providing stable and appropriate pressure conditions for the coffee machine to extract coffee, ensuring the smooth progress of the coffee extraction process.

[0040] like Figure 4 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the boiler assembly 3 includes a shell 31, a heating pipe 32 and a return pipe 33, a heating chamber 303 is provided in the shell 31, the heating pipe 32 is arranged on the shell 31 and located in the heating chamber 303, the return pipe 33 is arranged in the shell 31, the return pipe 33 runs through the heating chamber 303, and the return pipe 33 is provided with a liquid outlet channel 304. By arranging the heating chamber 303 inside the shell 31 of the boiler assembly 3, and placing the heating pipe 32 inside the heating chamber 303, the heating pipe 32 is used to heat the liquid in the boiler assembly 3 to a suitable temperature, which can stimulate the aroma of coffee and avoid the sourness or bitterness of coffee affecting the experience, and then the liquid is sent to the coffee brewing position through the return pipe 33 arranged in the shell 31, and finally a cup of fragrant and delicious hot coffee is made for the user. The heating chamber 303 also has the function of storing hot water, ensuring that there is enough hot water to make multiple cups of coffee at the same time, and ensuring the continuity and stability of coffee making.

[0041] like Figure 1 and Figure 4As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the boiler assembly 3 also includes a locking assembly, which is arranged on the housing 31 and located on the side where the liquid outlet end of the liquid outlet channel 304 is located, and also includes a brewing assembly 5, which is adapted to the locking assembly. By arranging the locking assembly on the housing 31 and located on the side of the liquid outlet end of the liquid outlet channel 304, and adapting the brewing assembly 5 to the locking assembly, it is ensured that the brewing assembly 5 can be firmly fixed at the designated position during the working process, so that the liquid outlet channel 304 can send the liquid to the brewing assembly 5, and effectively prevent the displacement or shaking of the brewing assembly 5 due to machine vibration, pressure change or other external factors, thereby ensuring the stability and consistency of the brewing process and ensuring the normal progress of coffee making. At the same time, the brewing assembly 5 can be quickly and conveniently disassembled by operating the locking assembly, which improves the maintainability and convenience of use of the equipment.

[0042] like Figure 1 and Figure 2 As shown, in addition to the features of the above-mentioned embodiment, this embodiment is further defined as follows: it also includes a pressure relief component 6, the three-way solenoid valve 41 is provided with a pressure relief port 403, and the pressure relief component 6 is arranged on the three-way solenoid valve 41 and located at the pressure relief port 403. By arranging the pressure relief component 6 on the three-way solenoid valve 41 and being located at the pressure relief port 403 of the solenoid valve, the coffee machine can be further relieved of pressure, thereby avoiding excessive pressure of the liquid flowing back to the boiler, affecting the final product of the coffee, and even the high-temperature liquid may threaten the personal safety of the user. The pressure relief component 6 is another layer of protection for the coffee machine, so that the coffee machine can maintain stable performance under various working conditions, reduce equipment failures and downtime caused by pressure problems, and improve the reliability and use efficiency of the equipment.

[0043] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A coffee machine, characterized in that: The coffee machine comprises: A water pump (1), wherein the water pump (1) is provided with a water pump liquid outlet (101); A pressure regulating valve (2), the pressure regulating valve (2) being provided with a valve liquid inlet (201) and a valve liquid outlet (202), the valve liquid inlet (201) of the pressure regulating valve (2) being in communication with the water pump liquid outlet (101) of the water pump (1); A boiler assembly (3), wherein the boiler assembly (3) is provided with a heating chamber (303), the boiler assembly (3) is provided with a boiler liquid inlet (301) and a boiler liquid outlet (302) which are in communication with the heating chamber (303), the boiler assembly (3) is provided with a liquid outlet channel (304), the liquid outlet channel (304) runs through the heating chamber (303), and the boiler liquid inlet (301) is in communication with the valve liquid outlet (202); A pressure detection component (4), the pressure detection component (4) being respectively connected to the boiler liquid outlet (302) and the liquid inlet end of the liquid outlet channel (304), and the liquid outlet end of the liquid outlet channel (304) is used to supply liquid to the brewing component (5).

2. The coffee machine according to claim 1, characterized in that The pressure detection assembly (4) comprises a three-way solenoid valve (41) and a pressure gauge (42); the three-way solenoid valve (41) is provided with a liquid inlet (401) and a liquid outlet (402); the liquid inlet (401) of the three-way solenoid valve (41) and the boiler liquid outlet (302) of the boiler assembly (3) are connected via a first pipeline; the liquid outlet (402) of the three-way solenoid valve (41) and the liquid inlet end of the liquid outlet channel (304) of the boiler assembly (3) are connected via a second pipeline; and the pressure gauge (42) is in communication with the second pipeline.

3. The coffee machine according to claim 1, characterized in that The pressure regulating valve (2) comprises a liquid inlet block (21), a liquid outlet block (22) and a pressure-changing valve body (23); the liquid inlet block (21) and the liquid outlet block (22) are arranged on the pressure-changing valve body (23); the liquid inlet block (21) is provided with the valve liquid inlet (201); the liquid outlet block (22) is provided with the valve liquid outlet (202); the pressure-changing valve body (23) is provided with a liquid passage (203); the liquid passage (203), the valve liquid inlet (201) and the valve liquid outlet (202) are sequentially connected.

4. The coffee machine according to claim 3, characterized in that The pressure-changing valve body (23) comprises a pressure-changing valve body (231), a first pressure relief valve (232), a second pressure relief valve (233), a pressure-changing valve cover (234) and a pressure-changing valve stem assembly (235); the pressure-changing valve body (231) is provided with the liquid passage (203); the first pressure relief valve (232), the second pressure relief valve (233) and the pressure-changing valve cover (234) are arranged on the pressure-changing valve body (231); the pressure-changing valve stem assembly (235) is passed through the pressure-changing valve cover (234); and a portion of the pressure-changing valve stem assembly (235) is located in the liquid passage (203).

5. The coffee machine according to claim 4, characterized in that The pressure-changing valve stem assembly (235) has at least a first position and a second position relative to the pressure-changing valve body (231); when the pressure-changing valve stem assembly (235) is located at the first position, the liquid passage (203) is connected to the first pressure relief valve (232); when the pressure-changing valve stem assembly (235) is located at the second position, the liquid passage (203) is connected to both the first pressure relief valve (232) and the second pressure relief valve (233).

6. The coffee machine according to claim 5, characterized in that The pressure-changing valve stem assembly (235) comprises a valve stem (2351) and a handle (2352); the valve stem (2351) passes through the pressure-changing valve cover (234); a portion of the valve stem (2351) is built into the pressure-changing valve body (231); the handle (2352) is arranged on the valve stem (2351); and the handle (2352) can drive the valve stem (2351) to move.

7. The coffee machine according to claim 6, characterized in that The pressure-changing valve cover (234) includes a valve cover body (2341), a first sealing ring (2342) and a second sealing ring (2343); the valve cover body (2341) is arranged on the pressure-changing valve body (231); the first sealing ring (2342) is arranged on the valve cover body (2341) and / or the pressure-changing valve body (231); and the second sealing ring (2343) is arranged on the valve cover body (2341) and / or the valve stem (2351).

8. The coffee machine according to claim 1, characterized in that The boiler assembly (3) comprises a shell (31), a heating tube (32) and a return tube (33); the shell (31) is provided with the heating chamber (303); the heating tube (32) is arranged on the shell (31) and located in the heating chamber (303); the return tube (33) is arranged in the shell (31); the return tube (33) runs through the heating chamber (303); and the return tube (33) is provided with the liquid outlet channel (304).

9. The coffee machine according to claim 8, characterized in that The boiler assembly (3) further comprises a locking assembly, which is arranged on the shell (31) and is located on the side of the liquid outlet channel (304) where the liquid outlet end is located, and further comprises a brewing assembly (5), which is adapted to the locking assembly.

10. The coffee machine according to claim 2, characterized in that It also comprises a pressure relief component (6), the three-way solenoid valve (41) is provided with a pressure relief port (403), and the pressure relief component (6) is arranged on the three-way solenoid valve (41) and is located at the pressure relief port (403).

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