Cold and hot adjustable coffee machine waterway structure and coffee machine

Abstract

The utility model relates to a cold and hot adjustable coffee machine waterway structure and a coffee machine, the waterway structure comprises a water supply tank, a pump assembly, a hot coffee pipeline and a cold coffee pipeline, the water supply tank comprises a warm water cavity and a cold water cavity which are separated from each other; the pump assembly comprises a water inlet solenoid valve and a water pump, a first water inlet and a second water inlet of the water inlet solenoid valve communicate with the cold water cavity and the warm water cavity correspondingly, and a water outlet of the water inlet solenoid valve communicates with a water inlet of the water pump. A water outlet of the water pump is respectively communicated with the hot coffee pipeline and the cold coffee pipeline through a first three-way joint; when the water inlet electromagnetic valve is in a first on-off state, the warm water cavity is communicated with the hot coffee pipeline to extract hot coffee; when the water inlet electromagnetic valve is in the second switch state, the cold water cavity is communicated with the cold coffee pipeline to extract cold coffee. On the basis of cooperation between the water supply tank and the water path structure, two making experiences of cold coffee and hot coffee are achieved under the conditions that a compressor does not need to be installed and the size of the coffee machine does not need to be increased.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine technology, and in particular to a water circuit structure and coffee machine with adjustable hot and cold temperature. Background Technology

[0002] Traditional coffee machines, when achieving both hot and cold water functionality, typically rely on independent water supply from dual tanks (cold / hot) or a compressor-based refrigeration system. This approach has significant drawbacks: the dual-tank structure increases the machine's size and manufacturing costs, and the switching between hot and cold water sources requires complex piping and solenoid valve coordination, leading to a higher failure rate; while compressor-based cooling solutions offer precise temperature control, they significantly increase energy consumption and noise, resulting in high maintenance costs and hindering widespread adoption in home and small-to-medium-sized commercial settings. Currently, no low-cost, highly integrated water tank structure exists that can achieve physical isolation and precise switching between hot and cold water flow without relying on external refrigeration or redundant tanks. Therefore, an innovative design is urgently needed to overcome the contradiction between hot and cold water supply through structural optimization, simplifying the system while maintaining thermal efficiency and user experience to meet diverse coffee-making needs. Utility Model Content

[0003] Therefore, it is necessary to provide a water circuit structure and coffee machine with adjustable hot and cold temperature to address the above problems.

[0004] The first aspect of this application provides a water circuit structure for an adjustable hot and cold coffee machine, including:

[0005] A water supply tank, the water supply tank comprising a warm water chamber and a cold water chamber that are separated from each other;

[0006] A pump assembly, comprising an inlet solenoid valve and a water pump, wherein the first inlet and the second inlet of the inlet solenoid valve are respectively connected to the cold water chamber and the warm water chamber, and the outlet of the inlet solenoid valve is connected through the inlet of the water pump.

[0007] The water pump outlet is connected to the hot coffee pipeline and the cold coffee pipeline respectively through a first tee connector;

[0008] When the water inlet solenoid valve is in the first switch state, the warm water chamber is connected to the hot coffee pipeline to extract hot coffee; when the water inlet solenoid valve is in the second switch state, the cold water chamber is connected to the cold coffee pipeline to extract cold coffee.

[0009] In one embodiment, the water supply tank is a shell structure, and an insulation layer is provided inside the water supply tank to divide the internal space of the water supply tank into the warm water chamber and the cold water chamber, and the water supply tank is provided with drain outlets that communicate with the warm water chamber and the cold water chamber respectively.

[0010] In one embodiment, a drain valve is provided on the drain outlet. The drain valve includes a valve plug, a spring, and a sealing ring. The drain outlet has a groove structure with an opening at the bottom. The valve plug is inserted into the drain outlet and extends at least partially through the drain outlet into the warm water chamber or the cold water chamber. The sealing ring is sleeved on the end of the valve plug away from the drain outlet. One end of the spring is connected to the valve plug, and the other end is connected to the drain outlet. The valve plug is movable relative to the drain outlet and forms at least a first position and a second position.

[0011] When the valve plug is in the first position, the sealing ring blocks the gap between the drain port and the valve plug, and the drain port is in a closed state; when the valve plug is in the second position, the sealing ring moves away from the drain port, and the drain port is in a conductive state.

[0012] In one embodiment, the hot coffee pipeline is equipped with a one-way valve, a heating pot, and a hot coffee solenoid valve, and the first outlet of the first tee connector is connected to the brewing head in sequence through the one-way valve, the heating pot, and the hot coffee solenoid valve.

[0013] In one embodiment, the hot coffee pipeline is further provided with a four-way connector, a steam solenoid valve, and a hot water solenoid valve. The inlet of the four-way connector is connected to the outlet of the heating pot, the first outlet of the four-way connector is connected to the hot coffee solenoid valve, the second outlet of the four-way connector is connected to the steam solenoid valve, and the third outlet of the four-way connector is connected to the hot water solenoid valve.

[0014] In one embodiment, a cold coffee solenoid valve is provided on the cold coffee pipeline, and the second outlet of the first tee connector is connected to the brewing head through the cold coffee solenoid valve.

[0015] In one embodiment, the hot coffee solenoid valve and the brewing head further include a second three-way connector and a third three-way connector. The first outlet of the hot coffee solenoid valve is connected to the inlet of the second three-way connector, the first outlet of the second three-way connector is connected to the inlet of the third three-way connector, the second outlet of the second three-way connector is connected to a pressure gauge, the first outlet of the third three-way connector is connected to the brewing head, and the second outlet of the third three-way connector is connected to the outlet of the cold coffee solenoid valve.

[0016] In one embodiment, the pump assembly further includes a protection valve, which has a one-inlet, two-outlet valve body structure. The inlet of the protection valve is connected to the outlet of the water pump, the first outlet of the protection valve is connected to the inlet of the first three-way connector, and the second outlet of the protection valve is connected through a drain nozzle.

[0017] In one embodiment, the hot coffee solenoid valve has a one-inlet, two-outlet valve body structure. The inlet of the hot coffee solenoid valve is connected to the first outlet of the four-way connector, the first outlet of the hot coffee solenoid valve is connected to the brewing head, and the second outlet of the hot coffee solenoid valve is connected to the drain nozzle.

[0018] In one embodiment, the cold coffee solenoid valve has a one-inlet, two-outlet valve body structure. The inlet of the cold coffee solenoid valve is connected to the second outlet of the first three-way connector, the first outlet of the cold coffee solenoid valve is connected to the brewing head, and the second outlet of the cold coffee solenoid valve is connected to the drain nozzle.

[0019] The second aspect of this application provides a coffee machine, including the water circuit structure of the adjustable hot and cold coffee machine as described in any of the preceding claims.

[0020] The water circuit structure of the adjustable hot and cold coffee machine in the above embodiments has at least the following advantages:

[0021] The water supply tank is connected to a water pump via an inlet solenoid valve. The water pump is connected to both hot and cold coffee lines via a three-way connector. The water supply tank contains a warm water chamber for storing warm water and a cold water chamber for storing cold water. These chambers are selectively connected to the water pump via the inlet solenoid valve. When the inlet solenoid valve is in its first state, the warm water chamber is connected to the water pump, supplying warm water to the hot coffee line for brewing hot coffee. When the inlet solenoid valve is in its second state, the cold water chamber is connected to the water pump, supplying cold water to the cold coffee line for brewing cold coffee. This application, based on the coordination between the water supply tank and the water system structure, enables both hot and cold coffee brewing experiences without the need for a compressor or an increased coffee machine size. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the water circuit structure of a hot and cold adjustable coffee machine in one embodiment.

[0023] Figure 2 This is a schematic diagram of the water supply tank in one embodiment;

[0024] Figure 3 for Figure 2 Enlarged view of section A.

[0025] The correspondence between the reference numerals and the component names is as follows:

[0026] 100 Water supply tank, 110 Insulation layer, 120 Drain valve, 121 Valve plug, 122 Spring, 123 Sealing ring, 101 Warm water chamber, 102 Cold water chamber, 103 Drain outlet;

[0027] 200 pump assembly, 210 inlet solenoid valve, 220 water pump, 230 protection valve;

[0028] 300 hot coffee tubing, 310 one-way valve, 320 heating pot, 330 hot coffee solenoid valve, 340 four-way connector, 350 steam solenoid valve, 360 hot water solenoid valve.

[0029] 400 cold coffee tubing, 410 cold coffee solenoid valve;

[0030] T1 First T-connector, T2 Second T-connector, T3 Third T-connector, T4 Drain nozzle. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0033] The following describes the water circuit structure of an adjustable hot and cold coffee machine according to some embodiments of the present invention with reference to the accompanying drawings.

[0034] like Figures 1 to 3 As shown, this embodiment discloses a water circuit structure for an adjustable hot and cold coffee machine, including:

[0035] Water supply tank 100 includes a warm water chamber 101 and a cold water chamber 102 that are separated from each other;

[0036] Pump assembly 200 includes an inlet solenoid valve 210 and a water pump 220. The first inlet and the second inlet of the inlet solenoid valve 210 are respectively connected to the cold water chamber 102 and the warm water chamber 101. The outlet of the inlet solenoid valve 210 is connected through the inlet of the water pump 220.

[0037] The hot coffee line 300 and the cold coffee line 400 are connected to the outlet of the water pump 220 via the first tee connector T1.

[0038] When the water inlet solenoid valve 210 is in the first switch state, the warm water chamber 101 is connected to the hot coffee pipeline 300 to extract hot coffee; when the water inlet solenoid valve 210 is in the second switch state, the cold water chamber 102 is connected to the cold coffee pipeline 400 to extract cold coffee.

[0039] This application discloses a water circuit structure for an adjustable hot and cold coffee machine. A water supply tank 100 is connected to a water pump 220 via an inlet solenoid valve 210. The water pump 220 is connected to a hot coffee pipeline 300 and a cold coffee pipeline 400 via a three-way connector. The water supply tank 100 is provided with a warm water chamber 101 for storing warm water and a cold water chamber 102 for storing cold water. The cold water chamber 102 and the warm water chamber 101 are selectively connected to the water pump 220 via the inlet solenoid valve 210. When the inlet solenoid valve 210 is in a first switch state, the warm water chamber 101 is connected to the water pump 220 and inputs warm water into the hot coffee pipeline 300 to extract hot coffee. When the inlet solenoid valve 210 is in a second switch state, the cold water chamber 102 is connected to the water pump 220 and inputs cold water into the cold coffee pipeline 400 to extract cold coffee. This application is based on the cooperation between the water supply tank 100 and the water circuit structure, so as to achieve both cold and hot coffee making experiences without installing a compressor or increasing the size of the coffee machine.

[0040] The water supply tank 100 has two internal cavities for storing liquids: a warm water cavity 101 and a cold water cavity 102. The warm water cavity 101 is used to store warm water, and the cold water cavity 102 is used to store cold water. In addition, the water supply tank 100 has two drain outlets 103, one of which is used to discharge warm water, and the other of which is used to discharge cold water.

[0041] Pump assembly 200 can be used to deliver water from water supply tank 100 to hot coffee line 300 and cold coffee line 400. Pump assembly 200 may include inlet solenoid valve 210 and water pump 220, which can be used to provide power to pump water out of water supply tank 100, and inlet solenoid valve 210 can be used to select one of the warm water chamber 101 or cold water chamber 102 to be connected to the inlet of water pump 220.

[0042] The hot coffee line 300 can be used to heat the input warm water and extract hot coffee, while the cold coffee line 400 can directly use the input cold water to extract cold coffee. Specifically, the water inlet solenoid valve 210 has a first switching state and a second switching state. For example, in the first switching state, the water inlet solenoid valve 210 is in the closed state. At this time, the warm water chamber 101 is connected to the water pump 220, while the cold water chamber 102 is disconnected from the water pump 220. The warm water in the warm water chamber 101 is transported to the hot coffee line 300 for heating and hot coffee extraction. In the second switching state, the water inlet solenoid valve 210 is in the open state. At this time, the cold water chamber 102 is connected to the water pump 220, while the warm water chamber 101 is disconnected from the water pump 220. The cold water in the cold water chamber 102 is transported to the cold coffee line 400 for cold coffee extraction.

[0043] like Figure 2As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the water supply tank 100 is a shell structure, the water supply tank 100 is provided with a heat insulation layer 110 to divide the internal space of the water supply tank 100 into a warm water chamber 101 and a cold water chamber 102, and the water supply tank 100 is provided with drain outlets 103 that communicate with the warm water chamber 101 and the cold water chamber 102 respectively.

[0044] The water circuit structure of the adjustable hot and cold water coffee machine in the above embodiment limits the water supply tank 100 to physically isolate and block the heat transfer between the warm water chamber 101 and the cold water chamber 102, ensuring that the water temperatures of the two do not interfere with each other. With independent water circuit control, efficient management of cold / warm water zones can be achieved in a limited space. Moreover, the integration of the cold and hot water chambers into a single housing reduces external pipe connections, lowers the risk of water leakage, and saves space in the whole machine.

[0045] The insulation layer 110 may be, but is not limited to, polyurethane foam, vacuum insulation board or silicone foam.

[0046] like Figure 2 and Figure 3 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: a drain valve 120 is provided on the drain outlet 103, the drain valve 120 includes a valve plug 121, a spring 122 and a sealing ring 123, the drain outlet 103 has a groove structure and an opening is provided at the bottom of the groove, the valve plug 121 is inserted into the drain outlet 103, and the valve plug 121 at least partially penetrates the drain outlet 103 and extends into the warm water chamber 101 or the cold water chamber 102, the sealing ring 123 is sleeved on the end of the valve plug 121 away from the drain outlet 103, one end of the spring 122 is connected to the valve plug 121 and the other end is connected to the drain outlet 103, the valve plug 121 can move relative to the drain outlet 103 and form at least a first position and a second position;

[0047] When the valve plug 121 is in the first position, the sealing ring 123 blocks the gap between the drain port 103 and the valve plug 121, and the drain port 103 is in the closed state; when the valve plug 121 is in the second position, the sealing ring 123 moves away from the drain port 103, and the drain port 103 is in the open state.

[0048] Specifically, when the water tank 100 is not installed on the coffee machine, the valve plug 121 is held in the first position by the action of the spring 122, and the sealing ring 123 on the valve plug 121 is tightly attached to the opening of the drain port 103, thereby sealing the gap between the drain port 103 and the valve plug 121. When the water tank 100 is installed in the coffee machine, after the pipe on the coffee machine is inserted into the drain port 103, the pipe overcomes the elastic force of the spring 122 and squeezes the valve plug 121, causing the valve plug 121 to move from the first position to the second position, thereby causing the sealing ring 123 to move away from the drain port 103.

[0049] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: a one-way valve 310, a heating pot 320 and a hot coffee solenoid valve 330 are provided on the hot coffee pipeline 300, and the first outlet of the first three-way connector T1 is connected to the brewing head in sequence through the one-way valve 310, the heating pot 320 and the hot coffee solenoid valve 330.

[0050] Specifically, when hot coffee needs to be extracted, the water inlet solenoid valve 210 is in the first switch state, the warm water chamber 101 is connected to the water pump 220 and the cold water chamber 102 is cut off from the water pump 220. Warm water enters the heating pot 320 from the first outlet of the first three-way connector T1 through the one-way valve 310 for heating. The heated water then enters the brewing head through the hot coffee solenoid valve 330. The one-way valve 310 prevents backflow, ensuring that water can only flow from the first three-way connector T1 to the heating pot 320 and cannot flow in the opposite direction. Thus, when the cold coffee solenoid valve 410 is opened, water will not flow back into the heating pot 320.

[0051] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the hot coffee pipeline 300 is also provided with a four-way connector 340, a steam solenoid valve 350 and a hot water solenoid valve 360, the inlet of the four-way connector 340 is connected to the outlet of the heating pot 320, the first outlet of the four-way connector 340 is connected to the hot coffee solenoid valve 330, the second outlet of the four-way connector 340 is connected to the steam solenoid valve 350, and the third outlet of the four-way connector 340 is connected to the hot water solenoid valve 360.

[0052] Specifically, the outlet of the hot water solenoid valve 360 ​​is connected to the hot water pipe. When the hot water solenoid valve 360 ​​is opened, the hot water from the heating pot 320 is output sequentially through the third outlet of the four-way connector 340 and the hot water pipe. The outlet of the steam solenoid valve 350 is connected to the steam pipe. When the steam solenoid valve 350 is opened, the steam in the heating pot 320 is output sequentially through the second outlet of the four-way connector 340 and the steam pipe. The outlet of the hot coffee solenoid valve 330 is connected to the brewing head. When the hot coffee solenoid valve 330 is opened, the steam in the heating pot 320 is output sequentially through the first outlet of the four-way connector 340 to the brewing head.

[0053] like Figure 1 and Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: a cold coffee solenoid valve 410 is provided on the cold coffee pipeline 400, and the second outlet of the first tee connector T1 is connected to the brewing head through the cold coffee solenoid valve 410.

[0054] like Figure 1As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the hot coffee solenoid valve 330 and the brewing head also include a second three-way connector T2 and a third three-way connector T3. The first outlet of the hot coffee solenoid valve 330 is connected to the inlet of the second three-way connector T2, the first outlet of the second three-way connector T2 is connected to the inlet of the third three-way connector T3, the second outlet of the second three-way connector T2 is connected to the pressure gauge, the first outlet of the third three-way connector T3 is connected to the brewing head, and the second outlet of the third three-way connector T3 is connected to the outlet of the cold coffee solenoid valve 410.

[0055] The system includes a pressure gauge connected to the second outlet of the second three-way connector T2, which allows for real-time monitoring of the water pressure in the hot coffee path, ensuring stable hot coffee extraction quality. Furthermore, the hot coffee line 300 and the cold coffee line 400 converge at the third three-way connector T3. Interlocking control is achieved by preventing the cold coffee solenoid valve 410 and the hot coffee solenoid valve 330 from opening simultaneously, ensuring physical isolation of the hot and cold water flows and eliminating the risk of mixing. Additionally, the series connection of the second three-way connector T2 and the third three-way connector T3 creates a local pressure buffer zone in the hot coffee line 300, reducing pressure fluctuations caused by the pulses of the water pump 220 or the switching of the solenoid valves, thus improving extraction stability.

[0056] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the pump assembly 200 also includes a protection valve 230, the protection valve 230 has a one-inlet and two-outlet valve body structure, the inlet of the protection valve 230 is connected to the outlet of the water pump 220, the first outlet of the protection valve 230 is connected to the inlet of the first three-way connector T1, and the second outlet of the protection valve 230 is connected through the drain nozzle T4.

[0057] Among them, the protection valve 230 can be a pressure-controlled diverter valve that can release pressure or drain water while ensuring normal water output during coffee extraction; specifically, the protection valve 230 keeps the first water outlet open in both hot and cold coffee extraction modes, while the second water outlet of the protection valve 230 opens when the pressure is too high and pressure needs to be released or when the coffee machine needs to drain water.

[0058] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the hot coffee solenoid valve 330 has a one-inlet and two-outlet valve body structure, the inlet of the hot coffee solenoid valve 330 is connected to the first outlet of the four-way connector 340, the first outlet of the hot coffee solenoid valve 330 is connected to the brewing head, and the second outlet of the hot coffee solenoid valve 330 is connected to the drain nozzle T4.

[0059] like Figure 1As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the cold coffee solenoid valve 410 has a one-inlet and two-outlet valve body structure, the inlet of the cold coffee solenoid valve 410 is connected to the second outlet of the first three-way connector T1, the first outlet of the cold coffee solenoid valve 410 is connected to the brewing head, and the second outlet of the cold coffee solenoid valve 410 is connected to the drain nozzle T4.

[0060] This embodiment provides a coffee machine, including the above-described adjustable hot and cold water circuit structure.

[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0062] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A cold-hot adjustable coffee machine water path structure, characterized in that, include: A water supply tank (100) includes a warm water chamber (101) and a cold water chamber (102) that are separated from each other; A pump assembly (200) includes an inlet solenoid valve (210) and a water pump (220). The first inlet and the second inlet of the inlet solenoid valve (210) are respectively connected to the cold water chamber (102) and the warm water chamber (101). The outlet of the inlet solenoid valve (210) is connected through the inlet of the water pump (220). Hot coffee line (300) and cold coffee line (400), the outlet of the water pump (220) is connected to the hot coffee line (300) and the cold coffee line (400) respectively through the first tee connector (T1); When the water inlet solenoid valve (210) is in the first switch state, the warm water chamber (101) is connected to the hot coffee pipeline (300) to extract hot coffee; when the water inlet solenoid valve (210) is in the second switch state, the cold water chamber (102) is connected to the cold coffee pipeline (400) to extract cold coffee.

2. The water path structure of the cold and hot adjustable coffee machine according to claim 1, characterized in that, The water supply tank (100) is a shell structure. A heat insulation layer (110) is provided inside the water supply tank (100) to divide the internal space of the water supply tank (100) into the warm water chamber (101) and the cold water chamber (102). The water supply tank (100) is provided with drain outlets (103) that communicate with the warm water chamber (101) and the cold water chamber (102).

3. The water path structure of the coffee machine with adjustable hot and cold water according to claim 2, characterized in that, A drain valve (120) is provided on the drain outlet (103). The drain valve (120) includes a valve plug (121), a spring (122), and a sealing ring (123). The drain outlet (103) has a groove structure and an opening at the bottom of the groove. The valve plug (121) is inserted into the drain outlet (103) and extends at least partially through the drain outlet (103) into the warm water chamber (101) or the cold water chamber (102). The sealing ring (123) is sleeved on the end of the valve plug (121) away from the drain outlet (103). One end of the spring (122) is connected to the valve plug (121), and the other end is connected to the drain outlet (103). The valve plug (121) can move relative to the drain outlet (103) and form at least a first position and a second position. When the valve plug (121) is in the first position, the sealing ring (123) blocks the gap between the drain port (103) and the valve plug (121), and the drain port (103) is in a closed state; when the valve plug (121) is in the second position, the sealing ring (123) moves away from the drain port (103), and the drain port (103) is in a conducting state.

4. The water path structure of the cold and hot adjustable coffee maker according to claim 1, characterized in that, The hot coffee pipeline (300) is equipped with a one-way valve (310), a heating pot (320), and a hot coffee solenoid valve (330). The first outlet of the first three-way connector (T1) is connected to the brewing head in sequence through the one-way valve (310), the heating pot (320), and the hot coffee solenoid valve (330).

5. The water path structure of the coffee machine with adjustable temperature according to claim 4, characterized in that, The hot coffee pipeline (300) is also equipped with a four-way connector (340), a steam solenoid valve (350), and a hot water solenoid valve (360). The inlet of the four-way connector (340) is connected to the outlet of the heating pot (320), the first outlet of the four-way connector (340) is connected to the hot coffee solenoid valve (330), the second outlet of the four-way connector (340) is connected to the steam solenoid valve (350), and the third outlet of the four-way connector (340) is connected to the hot water solenoid valve (360).

6. The water path structure of the coffee machine with adjustable temperature according to claim 5, characterized in that, The cold coffee pipeline (400) is equipped with a cold coffee solenoid valve (410), and the second outlet of the first three-way connector (T1) is connected to the brewing head through the cold coffee solenoid valve (410).

7. The water path structure of the coffee machine with adjustable temperature according to claim 6, characterized in that, The hot coffee solenoid valve (330) and the brewing head are further connected by a second three-way connector (T2) and a third three-way connector (T3). The first outlet of the hot coffee solenoid valve (330) is connected to the inlet of the second three-way connector (T2). The first outlet of the second three-way connector (T2) is connected to the inlet of the third three-way connector (T3). The second outlet of the second three-way connector (T2) is connected to a pressure gauge. The first outlet of the third three-way connector (T3) is connected to the brewing head. The second outlet of the third three-way connector (T3) is connected to the outlet of the cold coffee solenoid valve (410).

8. The water path structure of the coffee machine with adjustable temperature according to claim 6, characterized in that, The pump assembly (200) also includes a protection valve (230), which has a one-inlet and two-outlet valve body structure. The inlet of the protection valve (230) is connected to the outlet of the water pump (220), the first outlet of the protection valve (230) is connected to the inlet of the first three-way connector (T1), and the second outlet of the protection valve (230) is connected through a drain nozzle (T4).

9. The water circuit structure of the adjustable hot and cold coffee machine according to claim 8, characterized in that, The hot coffee solenoid valve (330) has a one-inlet and two-outlet valve body structure. The inlet of the hot coffee solenoid valve (330) is connected to the first outlet of the four-way connector (340), the first outlet of the hot coffee solenoid valve (330) is connected to the brewing head, and the second outlet of the hot coffee solenoid valve (330) is connected to the drain nozzle (T4). And / or, The cold coffee solenoid valve (410) has a one-inlet and two-outlet valve body structure. The inlet of the cold coffee solenoid valve (410) is connected to the second outlet of the first three-way connector (T1), the first outlet of the cold coffee solenoid valve (410) is connected to the brewing head, and the second outlet of the cold coffee solenoid valve (410) is connected to the drain nozzle (T4).

10. A coffee maker characterized in that, The water path structure of the cold-hot adjustable coffee machine comprises the water path structure as claimed in any one of claims 1-9.

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