Coffee machine boiler assembly and water circuit

Abstract

The application discloses a coffee machine boiler assembly, which comprises a heating pot, a brewing cup and a bracket, the heating pot is used for heating water, the brewing cup is arranged on the bracket, and the bracket is installed on the heating pot; the brewing cup has a brewing cavity, a cold water inlet is arranged on the bracket, the brewing cup is provided with a hot water inlet and a cold water inlet, the hot water inlet is communicated with the heating pot, and the cold water inlet is communicated with the cold water inlet; cold water can directly enter the brewing cup, so that the coffee machine has cold extraction and hot extraction functions at the same time, the cold water does not pass through the heating pot, and the influence of the heating pot on the temperature of the cold water can be avoided.

Description

Technical Field

[0001] This invention relates to the field of fully automatic coffee machine technology, and more particularly to coffee machine boiler components and water systems. Background Technology

[0002] The extraction process directly determines the taste of coffee, and there are two main extraction methods: hot brewing and cold brewing. Hot brewing uses hot water to accelerate the extraction of bitter and acidic substances from the coffee grounds. Cold brewing uses cold or near-freezing water to steep coffee grounds, typically employing a drip extraction method at low temperatures, resulting in a longer extraction time. Existing fully automatic coffee machines use the hot brewing process, heating pressurized cold water to 92°C via an instant heating element. This high-pressure hot water then brews the coffee grounds, producing a rich and concentrated coffee. However, as consumers increasingly demand personalized coffee flavors, coffee machines with only a hot brew function are no longer sufficient to meet their needs. Summary of the Invention

[0003] The purpose of this invention is to provide a coffee machine boiler assembly and water system to solve the problem that existing fully automatic coffee machines do not have a cold brew function.

[0004] The coffee machine boiler assembly of the present invention can be implemented by the following technical solution: A coffee machine boiler assembly includes: a heating pot, a brewing cup, and a holder, wherein the heating pot is used to heat water, the brewing cup is disposed on the holder, and the holder is mounted on the heating pot; the brewing cup has a brewing chamber, the holder is provided with a cold water inlet, the brewing cup is provided with a hot water inlet and a cold water inlet, the hot water inlet is connected to the heating pot, and the cold water inlet is connected to the cold water inlet.

[0005] In one embodiment, the heating pot has a mounting cavity, the bracket is placed in the mounting cavity, a cold water channel is provided in the side wall of the bracket, a hot water outlet and a cold water outlet are provided at the bottom of the bracket, the hot water outlet is connected to the heating pot, the hot water inlet is inserted into the hot water outlet, one end of the cold water channel is connected to the cold water inlet, the other end is connected to the cold water outlet, and the cold water inlet is inserted into the cold water outlet.

[0006] In one embodiment, the cold water outlet extends through the bottom of the bracket, the lower end of the cold water outlet is sealed by a sealing cap, a water passage is provided on the side wall of the sealing cap, the water passage is connected to the cold water channel, and the upper end of the cold water outlet is connected to the cold water inlet.

[0007] In one embodiment, the sealing cover is provided with a limiting groove and a fastener, the lower end of the cold water outlet has an annular flange, the annular flange is engaged in the limiting groove, and the bracket is provided with a protrusion, the protrusion being engaged with the fastener.

[0008] In one embodiment, the heating pot has a heating tube, a hot water tube, and a steam tube that are coaxially spirally wound inside. The outlet end of the hot water tube is connected to the hot water inlet, and the inlet end of the hot water tube and the inlet end of the steam tube are located on the same side.

[0009] In one embodiment, the heating element is located between the hot water pipe and the steam pipe, and the diameter of the steam pipe spiral is larger than the diameter of the hot water pipe spiral.

[0010] In one embodiment, the bottom edge of the bracket is provided with an annular support portion, which abuts against the heating pot.

[0011] In one embodiment, the sealing cover has a first stepped surface, the sealing ring is placed on the first stepped surface, the annular flange has a second stepped surface, the second stepped surface is opposite to the first stepped surface, and the sealing ring abuts against the second stepped surface.

[0012] This invention also provides a coffee machine water system, including the aforementioned boiler assembly, water tank, water distributor, water pump, brewing head, milk frother, and dispensing nozzle. The brewing cup has a sieve plate with several water inlets. A top rod is connected to the sieve plate, passing sequentially through the heating element, the bracket, and the brewing cup. The brewing head is slidably disposed within the brewing cup and has a water pipe connected to the dispensing nozzle. The water tank is connected to the water pump. The water distributor has an inlet pipe and a distribution pipe, with at least two distribution pipes. The inlet pipe is connected to the water pump, one of the distribution pipes is connected to the steam pipe inlet, and the steam outlet is connected to the milk frother. At least one distribution pipe is connected to the hot water pipe inlet, and the cold water inlet is connected to either the water pump or the distribution pipe.

[0013] In one embodiment, a hydraulic cylinder is also included, wherein one of the water distribution pipes is connected to the hydraulic cylinder, and the hydraulic cylinder drives the brewing head to move.

[0014] Compared with the prior art, the beneficial effects of the coffee machine boiler assembly of the present invention are as follows: a cold water inlet is provided on the bracket, and a hot water inlet and a cold water inlet are provided on the brewing cup. The cold water inlet is connected to the cold water inlet, so that cold water can directly enter the brewing cup, enabling the coffee machine to have both cold brew and hot brew functions at the same time. The cold water does not pass through the heating pot, which can avoid the cold water temperature being affected by the heating pot. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. The following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope of protection.

[0016] Figure 1 This is a schematic diagram of the coffee machine boiler assembly structure of the present invention;

[0017] Figure 2 An exploded view of the coffee machine boiler assembly of the present invention;

[0018] Figure 3 This is one of the cross-sectional views of the coffee machine boiler assembly of the present invention;

[0019] Figure 4 This is a second sectional view of the coffee machine boiler assembly of the present invention;

[0020] Figure 5 This is a schematic diagram of the bracket structure in the coffee machine boiler assembly of the present invention;

[0021] Figure 6 yes Figure 3 Enlarged view of section A in the middle;

[0022] Figure 7 This is a cross-sectional view of the coffee machine boiler assembly of the present invention, showing the combined state of the bracket and the brewing cup;

[0023] Figure 8 This is a schematic diagram of the water system of a coffee machine according to one embodiment of the present invention;

[0024] Figure 9 This is a schematic diagram of the water system of a coffee machine according to another embodiment of the present invention.

[0025] The diagram indicates: 10. Boiler assembly; 1. Heating pot; 11. Mounting cavity; 12. Heating element; 13. Hot water pipe; 131. Hot water pipe inlet; 132. Hot water pipe outlet; 14. Steam pipe; 141. Steam pipe inlet; 142. Steam outlet; 2. Brewing cup; 21. Brewing chamber; 22. Hot water inlet; 23. Cold water inlet; 24. Sieve plate; 241. Water inlet hole; 25. Top rod; 3. Bracket; 31. Cold water inlet; 32. Cold water channel; 33. Hot water outlet; 34. Cold water outlet. Water outlet; 341, annular flange; 3411, second step surface; 35, protrusion; 36, annular support; 37, lug; 38, guide tube; 4, sealing cover; 41, water passage hole; 42, limiting groove; 43, filter hole; 44, first step surface; 45, sealing ring; 20, water tank; 30, water pump; 40, flow meter; 50, water distributor; 501, water inlet pipe; 502, water distribution pipe; 51, three-way solenoid valve; 60, brewing head; 70, milk frother; 80, dispensing nozzle; 90, hydraulic cylinder. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] In the description of this invention, unless otherwise expressly specified and limited, the terms "installation," "installation," and "connection" should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art will understand the specific meaning of these terms in this invention according to the specific circumstances. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] like Figure 1-7 As shown, the coffee machine boiler assembly 10 of this embodiment includes a heating pot 1, a brewing cup 2, and a holder 3. The heating pot 1 is used to heat water. The brewing cup 2 has a brewing chamber 21 for holding coffee powder. A mechanism for tamping the coffee powder moves up and down in the brewing chamber 21. High-pressure water enters the brewing chamber 21, and coffee extraction is completed within a specific steeping time. The brewing cup 2 is mounted on the holder 3, and the holder 3 is mounted on the heating pot 1, thus assembling the three together. The holder 3 has a cold water inlet 31, and the brewing cup 2 has a hot water inlet 22 and a cold water inlet 23. The cold water inlet 31 is connected to a component that provides cold water, such as a water tank, a pump, or a refrigeration mechanism. The hot water inlet 22 is connected to the heating pot 1, and the heating pot 1 is connected to the coffee machine's water tank. Water is heated by the heating pot 1 and flows into the brewing cup 2 to brew and extract hot coffee from the coffee powder. The cold water inlet 23 is connected to the cold water outlet 31, allowing cold water to flow into the brewing cup 2, thereby cold-brewing the coffee powder to obtain cold coffee. Installing the boiler assembly 10 in this embodiment into a fully automatic coffee machine enables the machine to have both cold and hot brewing functions. The cold water outlet 31 is located on the bracket 3, preventing the cold water from passing through the heating element 1. When the user switches from hot brewing to cold brewing, the cold water temperature is not affected by the heating element 1, preventing the cold water temperature from rising and thus avoiding any impact on the flavor and taste of the cold coffee.

[0029] Furthermore, the heating pot 1 has a mounting cavity 11, in which the bracket 3 is placed. This serves to fix the bracket 3 and also reduces the overall size of the boiler assembly. Multiple lugs 37 are provided on the outer wall of the bracket 3, and these lugs 37 are locked onto the heating pot 1 by fasteners. The bottom of the bracket 3 has a hot water outlet 33 and a cold water outlet 34. The hot water inlet 22 of the brewing cup 2 is inserted into the hot water outlet 33, and the cold water inlet 23 is inserted into the cold water outlet 34, thus fixing the brewing cup 2 onto the bracket 3 and preventing leakage. A sealing element can be fitted onto the hot water inlet 22, or a snap-fit ​​structure can be added to enhance the seal between the two. The hot water outlet 33 is connected to the heating pot 1. Hot water heated by the heating pot 1 flows to the hot water outlet 33 and then flows from the hot water inlet 22 into the brewing cavity 2. A cold water channel 32 is provided on the side wall of the holder 3. One end of the cold water channel 32 is connected to the cold water inlet 31, and the other end is connected to the cold water outlet 34. This allows cold water to flow from the inner wall of the holder 3, out of the cold water outlet 34 at the bottom, and into the brewing chamber 2 through the cold water inlet 23. By placing the cold water channel 32 on the inner wall of the holder 3, cold water flows from the bottom of the brewing cup 2 into the brewing chamber 2, which reduces the likelihood of water splashing during the flow and ensures that the coffee grounds are completely soaked.

[0030] like Figure 3 , Figure 5 and Figure 7 As shown, in this embodiment of the invention, the cold water outlet 34 is configured to penetrate the bottom of the bracket 3 for convenient production and processing. To seal the lower end of the cold water outlet 34, a sealing cover 4 blocks the lower end of the cold water outlet 31. A water passage hole 41 is provided on the side wall of the sealing cover 4, which communicates with the cold water channel 32. The upper end of the cold water outlet 31 is connected to the cold water inlet 23. Cold water flows from the water passage hole 41 into the cold water outlet 31, then flows through the upper end of the cold water outlet 31 into the cold water inlet 23, and finally flows into the brewing chamber 21. The lower end of the cold water outlet 31 is provided with several filter holes 43 for filtering water quality and reducing water flow rate. In a specific implementation, a filter screen with filter holes 43 can be embedded in the sealing cover 4, thereby embedding the filter screen in the lower end of the cold water outlet 31.

[0031] In this embodiment, the bottom edge of the bracket 3 is provided with an annular support portion 36, which abuts against the heating pot 1, so that the bottom of the bracket 3 and the heating pot 1 do not directly contact each other, providing sufficient space for installing the sealing cap 4, and further isolating the cold water outlet from the heating pot 1 to prevent the heating pot 1 from affecting the cold water temperature. In addition, multiple support feet can also be provided on the annular support portion 36.

[0032] Specifically, the sealing cap 4 is provided with a limiting groove 42 and a snap fastener (not shown in the figure), the lower end of the cold water outlet 31 has an annular flange 341, and the bracket 3 has a protrusion 35. Since the cold water used for brewing coffee is pressurized and has a certain impact force, in order to prevent the sealing cap 4 from shifting from the lower end of the cold water outlet 31 when the high-pressure water flows, the annular flange 341 is engaged in the limiting groove 42, and the protrusion 35 is engaged with the snap fastener, thereby enhancing the connection between the sealing cap 4 and the bracket 3. In order to form a good seal at the lower end of the cold water inlet 23 and prevent water leakage, the sealing cap 4 is provided with a first stepped surface 44, the sealing ring 45 is placed on the first stepped surface 44, the annular flange 341 is provided with a second stepped surface 3411, the second stepped surface 3411 is opposite to the first stepped surface 44, the sealing ring 45 abuts against the second stepped surface 3411, and the sealing ring 45 is clamped on the outer edge of the cold water outlet 34, making it difficult to shift, thus having a high sealing performance.

[0033] like Figure 3-4 As shown, to improve the functionality of the coffee machine and reduce the number of boilers, the heating element 1 has a coaxially spirally wound heating element 12, hot water pipe 13, and steam pipe 14. The heating element 12 can simultaneously heat the hot water in the hot water pipe 13 and the steam pipe 14, while the steam pipe 14 provides steam for frothing milk. Thus, only one boiler is needed to achieve both hot brewing and milk frothing functions. The hot water pipe outlet 131 is connected to the hot water inlet 22, and the hot water pipe inlet 132 is connected to the water tank or water pump in the coffee machine. The hot water pipe outlet 131 is located in the mounting cavity 11 and is directly inserted into the hot water outlet 33, allowing the hot water in the hot water pipe 13 to flow into the brewing cavity 21. The hot water pipe inlet 131 and the steam pipe inlet 141 are located on the same side, facilitating the internal water pipe routing of the coffee machine.

[0034] Specifically, the heating element 12 is located between the hot water pipe 13 and the steam pipe 14, shortening the heat transfer path and improving heating efficiency. The spiral diameter of the steam pipe 14 is larger than that of the hot water pipe 13. This means that the steam pipe 14 is located on the outermost layer, the heating element 12 on the middle layer, and the hot water pipe 13 on the innermost layer. Since the hot water used for coffee extraction is typically 92°C, while steam needs to be hotter than the hot water, placing the evaporation heating element 12 in the middle layer creates a temperature difference between the inner and outer layers during heating, which is beneficial for the stable generation of hot water and steam and avoids mutual interference.

[0035] like Figure 8-9As shown, this embodiment also provides a coffee machine water system, which includes the aforementioned boiler assembly 10, water tank 20, water distributor 50, water pump 30, brewing head 60, milk frother 70, and dispensing nozzle 80. The brewing cup 2 has a sieve plate 24 on which coffee powder is placed. The sieve plate 24 has several water inlet holes 241, through which water flows to moisten the coffee powder. The water tank 20 is connected to the water pump 30, and a flow meter 40 is connected between them to calculate the water flow rate. The water distributor 50 is connected to the boiler assembly 10 and is used to control the water flow direction, including steam, hot water, and / or cold water. The water distributor 50 has an inlet pipe 501 and a distribution pipe 502. The inlet pipe 501 is connected to the water pump 30, and there are at least two distribution pipes 502, one of which is connected to the steam pipe inlet 141 to control the connection between the water tank 20 and the steam pipe 14. Steam outlet 142 is connected to milk frother 70 to provide steam for frothing milk. At least one water distribution pipe 502 is connected to the hot water inlet 131 to control the flow between water tank 10 and hot water pipe 13. Cold water inlet 31 is connected to water pump 30, or cold water inlet 31 is connected to water distribution pipe 502, thereby connecting water tank 20 and cold water channel 32. By controlling the flow of hot and cold water, the coffee machine can quickly switch between hot and cold brew, simplifying the water system and reducing the number of valves required.

[0036] The brewing head 60 is slidably positioned within the brewing cup 2, serving to compress and compact the coffee powder. The brewing head 60 is controlled by a drive mechanism to move within the brewing cup 2, thus achieving its slidable position. The drive mechanism can be a motor, hydraulic pump, or other power transmission device. The brewing head 60 has a water pipe connected to the dispensing nozzle 80. The extracted coffee flows out through the water pipe and finally from the dispensing nozzle 80. A push rod 25 is connected to the sieve plate 24, passing sequentially through the heating element 1, the support 3, and the brewing cup. After extraction, the coffee powder becomes coffee grounds, which are lifted upwards by the push rod 25 and removed. Specifically, the bracket 3 is equipped with a guide cylinder 38, and the push rod 25 passes through the guide cylinder 38. A sealing element is fitted on the push rod 25, and the sealing element is sealed to the bottom of the brewing cup 2. The sealing element is provided with a positioning groove, and the sieve plate 24 is provided with an annular positioning protrusion that is adapted to the positioning groove. When the push rod 25 moves upward, the sieve plate 24 moves upward, and the annular positioning protrusion separates from the positioning groove. When the push rod 25 moves downward, the sieve plate 24 moves downward, and the annular positioning protrusion is confined in the positioning groove, thereby positioning the downward movement of the sieve plate 24.

[0037] Specifically, the drive mechanism preferably uses a hydraulic cylinder 90. One of the water distribution pipes 502 of the water distributor 50 is connected to the hydraulic cylinder 90, and the hydraulic cylinder 90 drives the brewing head 60 to move. How the hydraulic cylinder 90 converts water into power output is existing technology and will not be elaborated here. Compared with using an electric motor drive, the hydraulic cylinder is smaller in size, resulting in a smaller overall size of the coffee machine. Secondly, in this embodiment, the hydraulic cylinder can achieve power conversion directly by connecting to the water distributor 50, which has high safety performance and is not limited by the installation position.

[0038] Specifically, the drive mechanism preferably uses a hydraulic cylinder 90. One of the water distribution pipes 502 of the water distributor 50 is connected to the hydraulic cylinder 90, and the hydraulic cylinder 90 drives the brewing head 60 to move. How the hydraulic cylinder 90 converts water into power output is existing technology and will not be elaborated here. Compared with using an electric motor drive, the hydraulic cylinder is smaller in size, resulting in a smaller overall size of the coffee machine. Secondly, in this embodiment, the hydraulic cylinder can achieve power conversion directly by connecting to the water distributor 50, which has high safety performance and is not limited by the installation position.

[0039] Figure 8 This invention demonstrates a first embodiment of the water system for a coffee machine. In this system, a water tank 20 is connected to a water pump 30, and a flow meter 40 is connected in series on the pipes connecting the two. The inlet pipe 501 of a distributor 50 is connected to the water pump 30, which draws water from the water tank 20 and pressurizes it. A three-way valve 51 is installed on the pipe connecting the water pump 30 and the distributor 50. The first port of the three-way valve 51 is connected to the water pump 30, the second port is connected to the inlet pipe 501 of the distributor 50, and the third port is connected to the cold water inlet 31. The distributor 50 has three branch pipes 502: the first branch pipe 502 is connected to the hot water inlet 131, the second branch pipe 502 is connected to the steam inlet 141, and the third branch pipe 502 is connected to the hydraulic cylinder 90. The distributor 50 controls whether water is supplied to the hot water pipe 13, the steam pipe 14, and the hydraulic cylinder 90.

[0040] When the user uses the hot brewing function, both the first and second ports of the three-way valve 51 are open, while the third port is closed, meaning only water flows to the distributor 50. The distributor 50 then switches the flow of each water pipe 502 according to the coffee-making process. For example, it first controls the third water pipe 502 to open, giving the hydraulic cylinder 9 power output to drive the brewing head 60 downwards to compact the coffee powder. Then, it switches to the first water pipe 502 to deliver hot water to the brewing cup 2. When the hot water reaches the preset amount, it cuts off the second water pipe 502. After brewing is complete, it switches to the third water pipe 502 to open, causing the brewing head 60 to move upwards. Similarly, when the user selects the milk frothing function, the distributor 50 controls the second water pipe 502 to open, delivering water to the steam pipe 14 to generate steam. When the user uses the cold extraction function, the three-way valve 51 switches so that both the first and third ports are open, while the second port is closed, meaning only water flows to the cold water inlet 31. The three-way valve 51 can control the switching between water flows in different branches of the water system, thus enabling the switching between hot and cold extraction.

[0041] Figure 9 This embodiment demonstrates a second implementation of the coffee machine's water system. In this system, the water tank 20 is connected to the water pump 30, and a flow meter 40 is connected in series on their pipelines. The inlet pipe 501 of the distributor 50 is directly connected to the water pump 30, which draws water from the water tank 20 and pressurizes it. The distributor 50 has three branch pipes 502. The first branch pipe 502 is connected to a three-way valve 51, forming two branches. Specifically, the first port of the three-way valve 51 is connected to the first branch pipe 502, the second port of the three-way valve 51 is connected to the hot water inlet 131, forming the first branch, and the third port of the three-way valve 51 is connected to the cold water inlet 31, forming the second branch. The second branch pipe 502 is connected to the steam inlet 141, and the third branch pipe 502 is connected to the hydraulic cylinder 90. The distributor 50 controls whether water is supplied to the hot water pipe 13, the cold water inlet 31, the steam pipe 14, and the hydraulic cylinder 90.

[0042] When the user uses the hot brew function, both the first and second ports of the three-way valve 51 are open, while the third port is closed, meaning only the second branch is open. The water distributor 50 switches the flow of each water pipe 502 according to the coffee-making process. For example, it first controls the third water pipe 502 to open, giving the hydraulic cylinder 9 power output to drive the brewing head 60 downwards to compact the coffee powder. Then, it switches to the first water pipe 502 to open, supplying hot water only to the brewing cup 2. When the hot water reaches the preset volume, it cuts off the second water pipe 502. After brewing is complete, it switches to the third water pipe 502 to open, causing the brewing head 60 to move upwards. When the user uses the cold brew function, the three-way valve 51 switches to the open state for both the first and third ports, while the second port is closed. Water flows only to the cold water inlet 31, and no water flows to the hot water pipe 13. In this case, cold water flows directly into the brewing cup 2. The three-way valve 51 controls the switching between the first and second branches of the water circuit system, enabling the switching between hot and cold extraction. When the user selects to use the milk frothing function, the water distributor 50 controls the second water distribution pipe 502 to open, and water is delivered to the steam pipe 14.

[0043] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. For those skilled in the art, various modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention patent. Therefore, the protection scope of the present invention patent should be determined by the claims.

Claims

1. A coffee machine boiler assembly, characterized in that, include: A heating pot, a brewing cup, and a holder are provided. The heating pot is used to heat water. The brewing cup is placed on the holder, and the holder is installed on the heating pot. The brewing cup has a brewing chamber. The holder has a cold water inlet. The brewing cup has a hot water inlet and a cold water inlet. The hot water inlet is connected to the heating pot, and the cold water inlet is connected to the cold water inlet.

2. The coffee machine boiler assembly according to claim 1, characterized in that, The heating pot has an installation cavity, the bracket is placed in the installation cavity, a cold water channel is opened in the side wall of the bracket, a hot water outlet and a cold water outlet are opened at the bottom of the bracket, the hot water outlet is connected to the heating pot, the hot water inlet is inserted into the hot water outlet, one end of the cold water channel is connected to the cold water inlet, and the other end is connected to the cold water outlet, the cold water inlet is inserted into the cold water outlet.

3. The coffee machine boiler assembly according to claim 2, characterized in that, The cold water outlet extends through the bottom of the bracket, and the lower end of the cold water outlet is sealed by a sealing cap. A water passage hole is provided on the side wall of the sealing cap, and the water passage hole is connected to the cold water channel. The upper end of the cold water outlet is connected to the cold water inlet.

4. The coffee machine boiler assembly according to claim 3, characterized in that, The sealing cover is provided with a limiting groove and a fastener. The lower end of the cold water outlet has an annular flange, which is engaged in the limiting groove. The bracket is provided with a protrusion, which is engaged with the fastener.

5. The coffee machine boiler assembly according to claim 2, characterized in that, The heating pot has a coaxial spirally wound heating tube, hot water tube and steam tube inside. The outlet end of the hot water tube is connected to the hot water inlet, and the inlet end of the hot water tube and the inlet end of the steam tube are located on the same side.

6. The coffee machine boiler assembly according to claim 5, characterized in that, The heating element is located between the hot water pipe and the steam pipe, and the diameter of the spiral coil of the steam pipe is larger than the diameter of the spiral coil of the hot water pipe.

7. The coffee machine boiler assembly according to claim 1, characterized in that, The bracket has an annular support at its bottom edge, which abuts against the heating pot.

8. The coffee machine boiler assembly according to claim 4, characterized in that, The sealing cover has a first stepped surface, the sealing ring is placed on the first stepped surface, the annular flange has a second stepped surface, the second stepped surface is opposite to the first stepped surface, and the sealing ring abuts against the second stepped surface.

9. A water system for a coffee machine, characterized in that, The invention comprises a boiler assembly, water tank, water distributor, water pump, brewing head, milk frother, and dispensing nozzle as described in any one of claims 1-8. The brewing cup has a sieve plate with several water inlets. A top rod is connected to the sieve plate and passes sequentially through the heating element, the bracket, and the brewing cup. The brewing head is slidably disposed within the brewing cup and has a water pipe connected to the dispensing nozzle. The water tank is connected to the water pump. The water distributor has an inlet pipe and a distribution pipe, with at least two distribution pipes. The inlet pipe is connected to the water pump. One of the distribution pipes is connected to the steam pipe inlet. The steam outlet is connected to the milk frother. At least one distribution pipe is connected to the hot water pipe inlet. The cold water inlet is connected to the water pump or the distribution pipe.

10. The coffee machine water system according to claim 9, characterized in that, It also includes a hydraulic cylinder, one of the water distribution pipes being connected to the hydraulic cylinder, the hydraulic cylinder driving the brewing head to move.

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