Coffee maker

Abstract

The application discloses a coffee machine, which comprises an ice making bin, a cold water waterway, a pressure-bearing instant heating assembly and an extraction waterway. The cold water waterway comprises a cold water pipe and a cold water pump and an extraction pump arranged on the cold water pipe in sequence in a water flow direction. A water inlet end of the cold water pipe is communicated with the ice making bin. A water inlet end of the pressure-bearing instant heating assembly is communicated with the cold water pipe. The extraction waterway comprises an extraction pipe and an extraction device. One end of the extraction pipe is communicated with a water outlet end of the pressure-bearing instant heating assembly, and the other end of the extraction pipe is communicated with the extraction device. The coffee machine has a hot extraction mode and a cold extraction mode. In the hot extraction mode, the pressure-bearing instant heating assembly is powered on to heat the cold water flowing therethrough. In the cold extraction mode, the pressure-bearing instant heating assembly is powered off to allow the cold water to pass through. The coffee machine has the hot extraction and the cold extraction sharing one waterway, so that the number of pipelines can be saved, and the structural compactness of the coffee machine is improved.

Description

Technical Field

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

[0002] As coffee machines become increasingly feature-rich, such as offering hot brew and cold brew functions, the number of internal components and corresponding tubing increases. This can lead to a larger internal footprint, hindering the design of a compact machine. Therefore, optimizing the tubing layout is essential to improve the machine's structural compactness. Summary of the Invention

[0003] This application provides a coffee machine in which hot brewing and cold brewing share a single water path, which can save on the number of pipes and improve the compactness of the coffee machine structure.

[0004] To achieve the above objectives, embodiments of this application provide a coffee machine, comprising:

[0005] Refrigerator manufacturing; The cold water circuit includes a cold water pipe and a cold water pump and an extraction pump arranged sequentially on the cold water pipe along the water flow direction. The inlet end of the cold water pipe is connected to the refrigerator. The pressurized instant heating component has its inlet end connected to the cold water pipe; and The extraction water path includes an extraction tube and an extraction device. One end of the extraction tube is connected to the water outlet of the pressurized instant heating component, and the other end is connected to the extraction device. The coffee machine has a hot brew mode and a cold brew mode. In the hot brew mode, the pressurized instant heating component is powered on to heat the flowing cold water; in the cold brew mode, the pressurized instant heating component is de-powered to allow cold water to pass through.

[0006] In some embodiments, the refrigerator has an ice storage cavity and a cold water cavity that are connected to each other, with the ice storage cavity located above the cold water cavity; The refrigerator is equipped with an ice-making module located above the ice storage cavity. The ice-making module has an ice-making mode for making ice cubes and a cooling water mode for making cold water. The ice cubes can fall into the ice storage cavity, and the cold water can flow into the cold water cavity. The cold water cavity is connected to the cold water pipe.

[0007] In some embodiments, the coffee machine further includes: The ice-making water circuit includes a circulation pipe and a circulation pump installed on the circulation pipe. One end of the circulation pipe is connected to the cold water chamber, and the other end is connected to the ice-making module. The circulation pump is used to transport water from the cold water chamber to the ice-making module.

[0008] In some embodiments, the cold water path further includes: A flow meter is installed in the cold water pipe and located upstream of the extraction pump to detect the inlet flow rate of the extraction pump.

[0009] In some embodiments, the cold water path further includes: A buffer noise reduction component is installed in the cold water pipe and located downstream of the extraction pump to reduce water flow noise.

[0010] In some embodiments, the extraction water path further includes: A coffee valve is installed in the extraction tube. The coffee valve has an inlet, an outlet, and a pressure relief port. The inlet is connected to the pressurized instant heating component, and the outlet is connected to the extraction device. When the coffee valve is in the open state, the inlet is connected to the outlet but not to the pressure relief port. When the coffee valve is in the closed state, the pressure relief port is connected to the water outlet but not to the water inlet, so as to relieve pressure on the extraction device.

[0011] In some embodiments, the coffee machine further includes: Raw water tank; A pure water production line is provided, with the inlet end connected to the raw water tank and the outlet end connected to the refrigerator, for supplying pure water to the refrigerator. The pressure relief port is connected to the raw water tank and is used to return the depressurized water to the raw water tank. Alternatively, the coffee machine may also include a water tray connected to the pressure relief port via a pipe to receive the pressure relief water flow.

[0012] In some embodiments, the coffee machine further includes: Pure water tank; The water outlet path includes a water outlet pipe and a water outlet pump installed on the water outlet pipe. One end of the water outlet pipe is connected to the pure water tank, and the other end is connected to the water inlet of the pressurized instant heating component. The coffee machine has a room temperature water supply mode and a hot water supply mode. In the hot water supply mode, the pressurized instant heating component is powered on to heat the water from the pure water tank. In the room temperature water supply mode, the pressurized instant heating component is de-powered to allow room temperature water from the pure water tank to pass through.

[0013] In some embodiments, the water outlet path further includes: A first check valve is installed in the outlet pipe and located downstream of the outlet pump.

[0014] In some embodiments, it also includes: The water supply circuit includes a water supply pipe and a water supply valve installed on the water supply pipe, wherein the water supply pipe is connected to the outlet end of the pressurized instant heating component.

[0015] In some embodiments, the coffee machine further includes: The overflow water path includes an overflow pipe, one end of which is connected to the pure water tank and the other end of which is connected to the refrigerator, for replenishing the refrigerator with pure water.

[0016] In some embodiments, the coffee machine further includes: Raw water tank; A pure water system is provided, with the inlet end connected to the raw water tank and the outlet end connected to the pure water tank, for supplying pure water to the pure water tank; The cold water return circuit includes a return pipe and a switching valve. One end of the return pipe is connected to the raw water tank, and the other end is connected to the switching valve. The switching valve is connected to both the return pipe and the cold water pipe and is located downstream of the cold water pump. The switching valve is used to selectively guide either the cold water pipe or the return pipe.

[0017] In some embodiments, the cold water return path further includes: A second check valve is installed in the return pipe and is located downstream of the switching valve.

[0018] In some embodiments, the purified water circuit includes: The raw water inlet pipe is connected to the raw water tank at its inlet end. A booster pump is installed in the raw water inlet pipe; A filtration assembly includes a first filter element and a second filter element. The first filter element includes a pre-filter unit and a post-filter unit. The inlet of the pre-filter unit is connected to the raw water inlet pipe, the outlet of the pre-filter unit is connected to the inlet of the second filter element, and the outlet of the second filter element is connected to the inlet of the post-filter unit. The pure water outlet pipe is connected at one end to the outlet of the post-filtration unit and at the other end to the pure water tank to replenish pure water to the pure water tank.

[0019] In some embodiments, the second filter element has a return port, and the coffee machine further includes a wastewater return path, the wastewater return path comprising: The wastewater pipe is connected at one end to the return port and at the other end to the raw water tank. Wastewater valve is installed on the wastewater pipe.

[0020] In the coffee machine provided in this embodiment, the inlet of the pressurized instant heating component is connected to the cold water pipe, and the outlet is connected to the extraction pipe of the extraction water circuit. In hot brew mode, the pressurized instant heating component is powered on and rapidly heats the cold water supplied from the cold water pipe. The heated hot water is then transported to the extraction device through the extraction pipe to complete the hot brew process. In cold brew mode, the pressurized instant heating component is de-powered, and cold water flows directly through the inside of the pressurized instant heating component, eliminating the need for additional cold brew piping. This significantly reduces the number of pipes, simplifies the internal piping layout, makes the internal structure of the coffee machine more compact, reduces the complexity of pipe connections, and improves the overall operational stability of the coffee machine.

[0021] This application solves the problem of complex piping and large space occupation caused by the increased functions of existing coffee machines by having the water flow for both cold brew and hot brew modes pass through a pressurized instant heating component. While achieving cold and hot brew functions, it saves the number of pipes, optimizes the internal layout, and makes the overall structure of the machine more compact. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a coffee machine according to one embodiment of this application; Figure 2 This is a schematic diagram of the internal structure of a coffee machine from one perspective in one embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of a coffee machine from another perspective in one embodiment of this application; Figure 4 This is a schematic diagram of the water circuit of a coffee machine in one embodiment of this application.

[0024] Explanation of icon numbers: 1. Outer shell assembly; 11. Front panel; 12. Base; 13. Top plate; 14. Side panel; 2. Refrigerator; 2A. Ice storage cavity; 2B. Cold water cavity; 3. Cold water circuit; 31. Cold water pipe; 32. Cold water pump; 33. Extraction pump; 34. Flow meter; 35. Buffer and noise reduction components; 4. Pressurized instant heating component; 5. Extraction water circuit; 51. Extraction pipe; 52. Extraction device; 53. Coffee valve; 6. Ice making module; 7. Ice making water circuit; 71. Circulation pipe; 72. Circulation pump; 8. Raw water tank; 9. Pure water circuit; 91. Raw water inlet pipe; 92. 93. Pressure pump; 931. Filter assembly; 932. First filter element; 933. Second filter element; 94. Pure water outlet pipe; 100. Outlet water path; 110. Outlet water pipe; 120. Outlet water pump; 130. First check valve; 200. Pure water tank; 300. Water supply path; 310. Water supply pipe; 320. Water supply valve; 400. Overflow path; 410. Overflow pipe; 500. Cold water return path; 510. Return pipe; 520. Switching valve; 530. Second check valve; 600. Wastewater return path; 610. Wastewater pipe; 620. Wastewater valve.

[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0027] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0028] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please see Figures 1 to 4 This application provides a coffee machine that uses a shared water circuit in both cold brew and hot brew modes, which can save on the number of pipes and improve the compactness of the coffee machine.

[0031] Specifically, the coffee machine of this embodiment includes an outer casing assembly 1, a refrigerator 2, a cold water circuit 3, a pressurized instant heating component 4, and an extraction water circuit 5. The outer casing assembly 1 includes a front panel 11, a base 12, a top plate 13, and a side plate 14. The front panel 11, base 12, top plate 13, and side plate 14 enclose each other to form an installation space, thereby installing functional components and pipelines such as the refrigerator 2, cold water circuit 3, pressurized instant heating component 4, and extraction water circuit 5 inside the coffee machine.

[0032] The refrigerator 2 in this embodiment is used to provide the cold water required for the cold brew mode. An insulation layer can be installed on the outside of the refrigerator 2 to reduce the loss of cold water temperature inside the cabinet, improve the efficiency of cooling water and ensure the taste of cold brew coffee.

[0033] The cold water path 3 is a pipeline for transporting cold water. In this embodiment, the cold water path 3 includes a cold water pipe 31 and a cold water pump 32 and an extraction pump 33 arranged sequentially along the water flow direction on the cold water pipe 31. The inlet end of the cold water pipe 31 is connected to the refrigerator 2. The cold water pipe 31 can be a flexible or rigid pipe. The cold water pump 32 is used to extract the cold water in the refrigerator 2 and transport it to the extraction device 52. The extraction pump 33 is used to increase the water flow pressure to ensure that the water flows through the pressure-bearing instant heating component 4 and the extraction device 52, and to meet the pressure requirements during extraction. In this embodiment, whether in cold extraction mode or hot extraction mode, the cold water first enters the cold water pipe 31 from the refrigerator 2, is extracted by the cold water pump 32, is pressurized by the extraction pump 33, and then transported to the pressure-bearing instant heating component 4. In this way, the stability of the water flow and the required extraction pressure are ensured, and the stability of the extraction is improved.

[0034] In the existing water circuit layout of coffee machines, the cold brew water circuit is usually an additional pipeline, which easily results in a large space occupation inside the coffee machine, which is not conducive to the miniaturization design of the whole machine.

[0035] In this embodiment, by optimizing the connection layout of the pressurized instant heating component 4, the water flow in both the cold extraction mode and the hot extraction mode passes through a pressurized instant heating module, thereby saving the number of pipelines.

[0036] Specifically, the inlet of the pressurized instant heating component 4 is connected to the cold water pipe 31, and the outlet is connected to the extraction pipe 51 of the extraction water path 5. For example, the pressurized instant heating component 4 is a pressurized structure, which may include a built-in heating pipe and a temperature sensor. It can withstand a certain water flow pressure and has a fast heating response speed, which can quickly heat the flowing cold water to the temperature required for hot extraction.

[0037] In this embodiment, the pressurized instant heating component 4 can share pipelines for both cold and hot brewing modes. In hot brewing mode, the pressurized instant heating component 4 is powered on, the heating element works, and the cold water delivered from the cold water pipe 31 is rapidly heated. The heated hot water is then delivered to the extraction device 52 via the extraction pipe 51 to complete the hot brewing process. In cold brewing mode, the pressurized instant heating component 4 is de-powered, the heating element does not work, and the cold water flows directly through the inside of the pressurized instant heating component 4. There is no need to set up additional cold brewing pipelines, which greatly reduces the number of pipelines, simplifies the internal pipeline layout, makes the internal structure of the coffee machine more compact, reduces the complexity of pipeline connections, and improves the overall operational stability of the coffee machine.

[0038] In this embodiment, the extraction water path 5 includes an extraction tube 51 and an extraction device 52. One end of the extraction tube 51 is connected to the water outlet of the pressurized instant heating component 4, and the other end is connected to the extraction device 52. The extraction device 52 includes an extraction chamber for holding coffee powder and completing the extraction process. In hot extraction mode, heated hot water enters the extraction device 52 through the extraction tube 51 and comes into contact with the coffee powder to complete hot extraction. In cold extraction mode, cold water enters the extraction device 52 through the extraction tube 51 and comes into contact with the coffee powder to complete cold extraction.

[0039] This embodiment solves the problem of complex piping and large space occupation caused by the increased functions of existing coffee machines by passing the water flow of both cold brew and hot brew modes through a pressurized instant heating component 4. Under the premise of realizing cold and hot brew functions, it saves the number of pipes, optimizes the internal layout, and makes the whole machine structure more compact.

[0040] In some embodiments, the refrigerator 2 has an ice storage cavity 2A and a cold water cavity 2B that are connected. The ice storage cavity 2A is located above the cold water cavity 2B. Through the layered arrangement, the ice storage and cold water storage are independent yet interconnected. After the ice melts, it can flow directly into the cold water cavity 2B to replenish the cold water, thereby improving the water resource utilization rate and ensuring that the cold water in the cold water cavity 2B can maintain a low temperature. The refrigerator 2 is equipped with an ice-making module 6, which is located above the ice storage cavity 2A. The ice-making module 6 has an ice-making mode and a cooling water mode. In the ice-making mode, the ice produced can fall into the ice storage cavity 2A for storage. In the cooling water mode, the cold water produced can flow into the cold water cavity 2B, and the cold water cavity 2B is connected to the cold water pipe 31.

[0041] For example, the ice-making module 6 can be an evaporator. Correspondingly, the coffee machine also includes a compressor, a condenser, and refrigerant pipes. The compressor, condenser, and evaporator form a heat exchange circuit through the refrigerant pipes, and an ice grid is formed on the evaporator. In ice-making mode, the compressor starts, and the refrigerant circulates between the condenser and evaporator through the refrigerant pipes. The evaporator absorbs heat, causing heat exchange with the water flowing through the ice grid, which condenses into ice cubes. After the ice cubes are formed, they fall off and into the ice storage chamber 2A below. In chilled water mode, the evaporator cools the water, keeping the water in the chilled water chamber 2B at a low temperature. No additional refrigeration components are needed, integrating the ice-making and chilled water functions, thereby simplifying the structure and reducing energy consumption.

[0042] In some embodiments, the coffee machine further includes an ice-making water circuit 7, which includes a circulation pipe 71 and a circulation pump 72 disposed on the circulation pipe 71. One end of the circulation pipe 71 is connected to the cold water chamber 2B, and the other end is connected to the ice-making module 6. In ice-making mode, the circulation pump 72 is activated, transporting cold water in the cold water chamber 2B through the circulation pipe 71 to the ice tray of the ice-making module 6 to make ice. In chilled water mode, the circulation pump 72 is activated, causing the water in the cold water chamber 2B to circulate between the circulation pipe 71 and the cold water chamber 2B, and chilled water is produced by the cooling effect of the ice-making module 6.

[0043] In some embodiments, the cold water path 3 further includes a flow meter 34, which is installed on the cold water pipe 31 and located upstream of the extraction pump 33. The inlet of the flow meter 34 receives cold water, and its outlet is connected to the extraction pump 33. By monitoring the water flow rate through the cold water pipe 31, the signal is fed back to the coffee machine's control module. In this embodiment, the extraction pressure is related to the inlet water flow rate. Fluctuations in the water flow rate can lead to unstable extraction pressure, thus affecting the taste of the extracted coffee. This embodiment uses the flow meter 34 to accurately detect the water flow rate entering the extraction pump 33, thereby controlling the extraction pressure and preventing unstable extraction due to excessive or insufficient flow, thus improving the quality of coffee extraction.

[0044] In some embodiments, the cold water path 3 further includes a buffer noise reduction component 35, which is disposed on the cold water pipe 31 and located downstream of the extraction pump 33. Because the water flow velocity and pressure are high when the extraction pump 33 is operating, the water flow impacting the pipeline can easily generate noise. Exemplarily, the buffer noise reduction component 35 in this embodiment is provided with a buffer chamber, an elastic damping tube, or a sound-absorbing structure to buffer, reduce pressure, or absorb the water flow delivered by the extraction pump 33, thereby reducing the noise generated by the water flow impact and improving the user experience.

[0045] In some embodiments, the extraction water path 5 further includes a coffee valve 53, which is located on the extraction pipe 51 and has an inlet, an outlet, and a pressure relief port. The inlet is connected to the outlet of the pressurized instant heating component 4, and the outlet is connected to the extraction device 52. When the coffee valve 53 is open, the inlet and outlet are connected, and the pressure relief port is closed. Cold or hot water supplied from the pressurized instant heating component 4 can enter the extraction device 52 to achieve cold or hot extraction. When the extraction is complete, the coffee valve 53 is closed, the inlet is cut off, and the outlet and pressure relief port are connected. The high-pressure water flow in the extraction device 52 can be discharged from the pressure relief port to relieve pressure, thus avoiding problems such as pipe rupture and leakage caused by excessive pressure in the extraction device 52. This improves the safety and ease of operation of the coffee machine.

[0046] Furthermore, in some embodiments, the coffee machine also includes a raw water tank 8 and a purified water circuit 9. The inlet of the purified water circuit 9 is connected to the raw water tank 8, and the outlet is connected to the refrigerator 2. The purified water circuit 9 is used to filter the raw water to form purified water and supply it to the refrigerator 2 to meet the water requirements for cold brewing and hot brewing. In the above embodiments, the pressure relief port of the coffee valve 53 can be connected to the raw water tank 8, so that the depressurized water flows back into the raw water tank 8 for recycling; or, the coffee machine is equipped with a water receiving tray, which is connected to the pressure relief port through a pipe, and the water receiving tray receives the water discharged after depressurization.

[0047] In some embodiments, the coffee machine further includes a pure water tank 200 and a water outlet path 100. The water outlet path 100 includes a water outlet pipe 110 and a water pump 120 disposed on the water outlet pipe 110. One end of the water outlet pipe 110 is connected to the pure water tank 200, and the other end is connected to the water inlet of the pressurized instant heating component 4, thereby forming a water supply channel for supplying water to the pressurized instant heating component 4.

[0048] This embodiment of the coffee machine has both a room temperature water supply mode and a hot water supply mode. In the hot water supply mode, the pressurized instant heating component 4 is powered on and heats the flowing pure water to output hot water that meets the user's needs. In the room temperature water supply mode, the pressurized instant heating component 4 is de-energized, and room temperature water from the pure water tank 200 can flow directly through it. In this embodiment, both room temperature water and hot water use the same pressurized instant heating component 4 for both supply and heating, eliminating the need for separate heating or heating pipes for hot and room temperature water. This further reduces the number of pipes in the machine and improves the compactness of the internal structure.

[0049] In some embodiments, the water outlet path 100 further includes a first one-way valve 130, which is disposed on the water outlet pipe 110 and located downstream of the water outlet pump 120. Thus, the water flow is unidirectional from the water outlet pump 120 to the pressurized instant heating component 4. By providing the first one-way valve 130, this embodiment prevents backflow of cold water in the cold water path 3 and hot water in the pressurized instant heating component 4, thereby preventing interference between different water paths and ensuring the normal operation of the water outlet path 100, the cold water path 3, and the extraction water path 5, thereby improving the overall stability of the water system.

[0050] In some embodiments, the coffee machine further includes a water supply path 300, which includes a water supply pipe 310 and a water supply valve 320 disposed on the water supply pipe 310. The water supply pipe 310 is connected to the outlet end of the pressurized instant heating component 4, thereby forming a water supply channel for external water supply.

[0051] The water supply circuit 300 in this embodiment can simultaneously meet the user's needs for cold water, room temperature water, and hot water, enriching the coffee machine's functionality. Meanwhile, this embodiment includes a pure water tank 200, which can pre-store pure water. Compared to an on-demand water supply structure, this embodiment ensures a more sufficient and stable flow rate when the user takes water, and reduces noise caused by frequent pump starts and stops and the operation of the filter assembly 93 during water intake, thereby improving the user experience.

[0052] In some embodiments, the coffee machine further includes an overflow water path 400, which includes an overflow pipe 410. One end of the overflow pipe 410 is connected to the pure water tank 200, and the other end is connected to the refrigerator 2. This embodiment uses the overflow water path 400 to achieve overflow water replenishment by utilizing the liquid level difference between the pure water tank 200 and the refrigerator 2. When the water level in the pure water tank 200 reaches the overflow level, pure water can overflow into the refrigerator 2 through the overflow pipe 410. This eliminates the need for additional components such as water pumps and electronically controlled valves, reducing the number of valves used and lowering costs.

[0053] In some embodiments, the coffee machine further includes a pure water supply path 9, the inlet of which is connected to the raw water tank 8 and the outlet of which is connected to the pure water tank 200. The pure water supply path 9 is used to filter the raw water in the raw water tank 8 to form pure water and deliver it to the pure water tank 200, providing pure water for cold brew, hot brew and water supply functions.

[0054] The coffee machine is also equipped with a cold water return path 500, which includes a return pipe 510 and a switching valve 520. One end of the return pipe 510 is connected to the raw water tank 8, and the other end is connected to the switching valve 520. The switching valve 520 is connected to both the return pipe 510 and the cold water pipe 31, and is located downstream of the cold water pump 32. The switching valve 520 can selectively connect the cold water pipe 31 to the return pipe 510.

[0055] Since cold water in refrigerator 2 and cold water pipe 31 is prone to odor if left stagnant for a long time, affecting the taste of drinking water, this embodiment uses cold water return water path 500 to return the stagnant water in the pipe to the original water tank 8, and then filters it again through pure water production water path 9 to remove odor, thereby ensuring the taste of pure water. At the same time, a switching valve 520 is used to switch the water path, reducing the number of pipe branches and joints, and further simplifying the water path structure.

[0056] In some embodiments, the cold water return path 500 further includes a second one-way valve 530. The second one-way valve 530 is disposed on the return pipe 510 and located downstream of the switching valve 520, thus ensuring that the water flow can only proceed unidirectionally along the switching valve 520 towards the original water tank 8. By providing the second one-way valve 530, this embodiment prevents water in the original water tank 8 from flowing back into the refrigerator 2 under pressure or level difference, thereby improving the stability of the water system operation.

[0057] In some embodiments, the pure water production circuit 9 includes a raw water inlet pipe 91, a booster pump 92, a filter assembly 93, and a pure water outlet pipe 94. The inlet end of the raw water inlet pipe 91 is connected to the raw water tank 8. The booster pump 92 is installed on the raw water inlet pipe 91 to provide power for the raw water delivery. The filter assembly 93 includes a first filter element 931 and a second filter element 932. The first filter element 931 includes a pre-filtration unit and a post-filtration unit. The pre-filtration unit can be a PP scale-inhibiting carbon rod for preliminary filtration, and the post-filtration unit can be a carbon rod to improve the taste of the pure water. The second filter element 932 can be an RO filter cartridge. After the raw water is pre-filtered by the pre-filtration unit, it enters the second filter element 932, and then is filtered by the post-filtration unit to improve the taste. Finally, it is delivered to the pure water tank 200 through the pure water outlet pipe 94. This embodiment sets up a multi-stage filtration structure to improve the quality and taste of the pure water.

[0058] In some embodiments, the second filter element 932 is provided with a return port, and the coffee machine further includes a wastewater return path 600. The wastewater return path 600 includes a wastewater pipe 610 and a wastewater valve 620. One end of the wastewater pipe 610 is connected to the return port of the second filter element 932, and the other end is connected to the raw water tank 8. The wastewater valve 620 is installed on the wastewater pipe 610 to control the on / off state. Wastewater generated during the filtration process of the second filter element 932 can be returned to the raw water tank 8 through the wastewater pipe 610. Exemplarily, the raw water tank 8 is provided with a wastewater chamber and an outlet chamber. Wastewater first enters the wastewater chamber for impurity deposition or preliminary filtration, and then overflows into the outlet chamber. The outlet chamber can be further equipped with a filtration device to achieve secondary pretreatment, so that the wastewater can be recycled, improving water resource utilization, reducing external wastewater discharge, and improving the environmental friendliness of the coffee machine.

[0059] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0060] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A coffee machine, characterized in that, include: Refrigerator manufacturing; The cold water circuit includes a cold water pipe and a cold water pump and an extraction pump arranged sequentially on the cold water pipe along the water flow direction. The inlet end of the cold water pipe is connected to the refrigerator. The pressurized instant heating component has its inlet end connected to the cold water pipe; and The extraction water path includes an extraction tube and an extraction device. One end of the extraction tube is connected to the water outlet of the pressurized instant heating component, and the other end is connected to the extraction device. The coffee machine has a hot brew mode and a cold brew mode. In the hot brew mode, the pressurized instant heating component is powered on to heat the flowing cold water. In the cold extraction mode, the pressurized instant heating component stops being powered to allow cold water to pass through.

2. The coffee machine as described in claim 1, characterized in that, The refrigerator has an ice storage cavity and a cold water cavity that are connected to each other, with the ice storage cavity located above the cold water cavity; The refrigerator is equipped with an ice-making module located above the ice storage cavity. The ice-making module has an ice-making mode for making ice cubes and a cooling water mode for making cold water. The ice cubes can fall into the ice storage cavity, and the cold water can flow into the cold water cavity. The cold water cavity is connected to the cold water pipe.

3. The coffee machine as described in claim 2, characterized in that, Also includes: The ice-making water circuit includes a circulation pipe and a circulation pump installed on the circulation pipe. One end of the circulation pipe is connected to the cold water chamber, and the other end is connected to the ice-making module. The circulation pump is used to transport water from the cold water chamber to the ice-making module.

4. The coffee machine as described in claim 1, characterized in that, The cold water circuit also includes: A flow meter is installed in the cold water pipe and located upstream of the extraction pump to detect the inlet flow rate of the extraction pump.

5. The coffee machine as described in claim 1, characterized in that, The cold water circuit also includes: A buffer noise reduction component is installed in the cold water pipe and located downstream of the extraction pump to reduce water flow noise.

6. The coffee machine as described in claim 1, characterized in that, The extraction water path also includes: A coffee valve is installed in the extraction tube. The coffee valve has an inlet, an outlet, and a pressure relief port. The inlet is connected to the pressurized instant heating component, and the outlet is connected to the extraction device. When the coffee valve is in the open state, the inlet is connected to the outlet but not to the pressure relief port. When the coffee valve is in the closed state, the pressure relief port is connected to the water outlet but not to the water inlet, so as to relieve pressure on the extraction device.

7. The coffee machine as described in claim 6, characterized in that, Also includes: Raw water tank; A pure water production line is provided, with the inlet end connected to the raw water tank and the outlet end connected to the refrigerator, for supplying pure water to the refrigerator. The pressure relief port is connected to the raw water tank and is used to return the depressurized water to the raw water tank. Alternatively, the coffee machine may also include a water tray connected to the pressure relief port via a pipe to receive the pressure relief water flow.

8. The coffee machine as described in claim 1, characterized in that, Also includes: Pure water tank; The water outlet path includes a water outlet pipe and a water outlet pump installed on the water outlet pipe. One end of the water outlet pipe is connected to the pure water tank, and the other end is connected to the water inlet of the pressurized instant heating component. The coffee machine has a room temperature water supply mode and a hot water supply mode. In the hot water supply mode, the pressurized instant heating component is powered on to heat the water from the pure water tank. In the ambient temperature water supply mode, the pressurized instant heating component stops being powered on to allow ambient temperature water from the pure water tank to pass through.

9. The coffee machine as described in claim 8, characterized in that, The water outlet path also includes: A first check valve is installed in the outlet pipe and located downstream of the outlet pump.

10. The coffee machine as claimed in claim 8, characterized in that, Also includes: The water supply circuit includes a water supply pipe and a water supply valve installed on the water supply pipe, wherein the water supply pipe is connected to the outlet end of the pressurized instant heating component.

11. The coffee machine as claimed in claim 8, characterized in that, Also includes: The overflow water path includes an overflow pipe, one end of which is connected to the pure water tank and the other end of which is connected to the refrigerator, for replenishing the refrigerator with pure water.

12. The coffee machine as described in claim 11, characterized in that, Also includes: Raw water tank; A pure water system is provided, with the inlet end connected to the raw water tank and the outlet end connected to the pure water tank, for supplying pure water to the pure water tank; The cold water return circuit includes a return pipe and a switching valve. One end of the return pipe is connected to the raw water tank, and the other end is connected to the switching valve. The switching valve is connected to both the return pipe and the cold water pipe and is located downstream of the cold water pump. The switching valve is used to selectively guide either the cold water pipe or the return pipe.

13. The coffee machine as described in claim 12, characterized in that, The cold water return path also includes: A second check valve is installed in the return pipe and is located downstream of the switching valve.

14. The coffee machine as described in claim 12, characterized in that, The purified water system includes: The raw water inlet pipe is connected to the raw water tank at its inlet end. A booster pump is installed in the raw water inlet pipe; A filtration assembly includes a first filter element and a second filter element. The first filter element includes a pre-filter unit and a post-filter unit. The inlet of the pre-filter unit is connected to the raw water inlet pipe, the outlet of the pre-filter unit is connected to the inlet of the second filter element, and the outlet of the second filter element is connected to the inlet of the post-filter unit. The pure water outlet pipe is connected at one end to the outlet of the post-filtration unit and at the other end to the pure water tank to replenish pure water to the pure water tank.

15. The coffee machine as described in claim 14, characterized in that, The second filter element has a return port, and the coffee machine further includes a wastewater return path, which includes: The wastewater pipe is connected at one end to the return port and at the other end to the raw water tank. Wastewater valve is installed on the wastewater pipe.

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