Coffee machine

Abstract

The utility model relates to a coffee machine which comprises a steam nozzle. The steam generating device is communicated with the steam nozzle, and the steam nozzle and the steam generating device form a part of a steam generating pipeline; a water receiving member; the heat exchange pipe is provided with a first opening and a second opening, the first opening is communicated with the steam generating device, the second opening is communicated with the water receiving component, and the water receiving component and the heat exchange pipe form a part of the pressure relief pipeline; the first valve body is communicated with the steam generating device and the steam nozzle and used for controlling the steam generating pipeline to be connected or disconnected, when the first valve body controls the steam generating pipeline to be connected, steam generated by the steam generating device can be discharged through the steam nozzle, and when the first valve body controls the steam generating pipeline to be disconnected, the steam generated by the steam generating device can be discharged through the steam nozzle. And residual steam generated by the steam generation device can flow into the heat exchange pipe, is liquefied by the heat exchange pipe and then is discharged into the water receiving component. Safe pressure relief and efficient residual steam treatment of the coffee machine steam system are achieved through the pressure relief pipeline, and a dry and clean environment in a machine body is maintained while long-term stable operation of equipment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of coffee machines, and in particular to a coffee machine. Background Technology

[0002] In existing coffee machines, after the steam function is stopped, the steam generator will continue to produce high-temperature and high-pressure residual steam due to residual heat. If the pressure is not released in time, it may cause excessive pressure in the pipeline, leading to seal failure or component fatigue damage.

[0003] To address the above issues, existing products typically incorporate pressure relief channels in the steam piping to release pressure. However, residual steam still directly enters the internal cavity of the coffee machine. The high-temperature, humid steam inside the machine can easily cause short circuits, corrosion of metal parts, and mold growth, thus affecting the product's lifespan. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a coffee machine with safe pressure relief and efficient residual steam treatment, aiming to solve at least one of the problems of the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a coffee machine, comprising:

[0007] Steam nozzle;

[0008] A steam generator is connected to the steam nozzle, and the steam nozzle and the steam generator form part of a steam generation pipeline.

[0009] Water receiving components;

[0010] The heat exchange tube has a first port and a second port. The first port is connected to the steam generator, and the second port is connected to the water receiving component. The water receiving component and the heat exchange tube form part of a pressure relief pipeline.

[0011] The first valve body is connected to the steam generator and the steam nozzle, and is used to control the opening or closing of the steam generating pipeline. When the first valve body controls the steam generating pipeline to open, the steam generated by the steam generator can be discharged through the steam nozzle. When the first valve body controls the steam generating pipeline to close, the residual steam generated by the steam generator can flow into the heat exchange tube and be liquefied by the heat exchange tube before being discharged into the water receiving component.

[0012] In the above technical solution, the inner diameter of the heat exchange tube is larger than the inner diameter of the pipeline between the heat exchange tube and the steam generator.

[0013] In any of the above technical solutions, the inner diameter of the second port is smaller than the inner diameter of the first port.

[0014] In any of the above technical solutions, the inner diameter of the second opening is greater than or equal to 0.6 mm and less than or equal to 2.4 mm;

[0015] The inner diameter of the second opening is 1.2 mm.

[0016] The above-mentioned technical solutions also include:

[0017] A water tank, connected to the heat exchange tube, is configured to supply water to the heat exchange tube.

[0018] In any of the above technical solutions, the steam generating device has an inlet and an outlet, the outlet is connected to the steam nozzle, the inlet is connected to the first port, and the water tank and the heat exchange tube form part of the steam generating pipeline;

[0019] The coffee machine also includes a second valve body having a first port, a second port, and a third port. The first port is connected to the second port, the second port is connected to the water tank, and the third port is connected to the water receiving component. When the second valve body connects the first port and the second port, the steam generating pipeline is connected. When the second valve body connects the first port and the third port, the pressure relief pipeline is connected.

[0020] In any of the above technical solutions, the vertical height of the second opening is lower than the lowest point of the water tank; and / or

[0021] The vertical height of the water receiving component is lower than that of the second inlet; and / or

[0022] The coffee machine also includes a drive unit connected to the water tank and configured to drive the water in the water tank to flow to the heat exchange tube.

[0023] In any of the above technical solutions, at least one heat exchange plate is provided inside the heat exchange tube;

[0024] The heat exchange plate extends along the direction from the second port to the first port, or the heat exchange plate extends spirally; and / or

[0025] The heat exchange tube is equipped with several heat dissipation fins.

[0026] The above-mentioned technical solutions also include:

[0027] The steam generator, the heat exchange tube, and the first valve body are disposed within the housing, and the steam nozzle is disposed on the housing.

[0028] The casing has several heat dissipation holes corresponding to the location of the heat exchange tube.

[0029] In any of the above technical solutions, the coffee machine further includes a housing, the steam generator, the heat exchange pipe, and the first valve body are disposed within the housing, and the steam nozzle is disposed on the housing; wherein,

[0030] The water receiving component is detachably mounted on the housing, or the coffee machine further includes a water receiving tray, which is detachably mounted on the housing and positioned opposite the dispensing nozzle of the coffee machine. The housing has a through hole at the position opposite the water receiving tray, and the second port is connected to the through hole via a connecting pipe. The water receiving tray is formed as the water receiving component.

[0031] This invention achieves safe pressure relief and efficient residual steam treatment in the coffee machine's steam system through a pressure relief pipeline. This ensures long-term stable operation of the equipment while maintaining a dry and clean internal environment. When the steam function is turned off, the first valve blocks the steam generation pipeline. The high-pressure residual steam in the steam generator automatically flows to the pressure relief pipeline under pressure, liquefies through heat exchange in the heat exchange tubes, and is then directed into the water collection component. On one hand, this effectively eliminates the high-pressure risk caused by residual steam retention in existing products, preventing damage to pipelines and sealing elements due to high pressure. On the other hand, the residual steam is forcibly condensed into liquid water during the pressure relief process and collected and stored by the water collection component, preventing water vapor from directly entering the coffee machine's internal cavity. This prevents moisture-induced short circuits in precision components such as circuit boards and sensors, or corrosion of metal structures, extending the product's lifespan. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of a coffee machine according to an embodiment of the present invention;

[0033] Figure 2 This is a three-dimensional structural schematic diagram of a coffee machine according to an embodiment of the present invention from another perspective;

[0034] Figure 3 This is a front view of a heat exchange tube according to an embodiment of the present invention;

[0035] Figure 4 for Figure 3 Sectional view of AA;

[0036] Figure 5 for Figure 3 A cross-sectional view of BB.

[0037] The correspondence between the reference numerals and the component names is as follows:

[0038] 10. Steam generating pipeline; 20. Pressure relief pipeline; 100. Steam nozzle; 200. Steam generating device; 210. Inlet; 220. Outlet; 300. Water receiving component; 400. Heat exchange tube; 410. First port; 420. Second port; 500. First valve body; 600. Water tank; 700. Second valve body; 710. First port; 720. Second port; 730. Third port; 800. Drive component. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model 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.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0041] The following is a reference to the appendix. Figure 1 To be continued Figure 5 This invention describes a coffee machine according to some embodiments of the present invention.

[0042] like Figure 1 As shown, an embodiment of this utility model proposes a coffee machine, including: a steam nozzle 100, a steam generator 200, a water receiving component 300, a heat exchange tube 400, and a first valve body 500.

[0043] The steam generator 200 is connected to the steam nozzle 100, and the steam nozzle 100 and the steam generator 200 form part of the steam generation pipeline 10.

[0044] The steam generator 200 is a component that generates high-pressure steam by heating water. Water vaporization is achieved through electric heating tubes or electromagnetic heating. The generated steam can flow along the pipeline to the steam nozzle 100. The steam nozzle 100 is a tubular component used to spray high-temperature steam. Its end is designed as a single-hole or multi-hole nozzle. When working, high-pressure steam is sprayed out at high speed through the nozzle to achieve milk foaming or cleaning.

[0045] Understandably, the steam generating line 10 also includes a water supply component for supplying water to the steam generating unit 200.

[0046] The heat exchange tube 400 has a first port 410 and a second port 420. The first port 410 is connected to the steam generator 200, and the second port 420 is connected to the water receiving component 300. The water receiving component 300 and the heat exchange tube 400 form part of the pressure relief pipeline 20. The heat exchange tube 400 is used to exchange heat with the gas flowing into it, so that the gas can be liquefied and then flow into the water receiving component 300.

[0047] For example, the heat exchange tube 400 can be made of copper or steel. Copper tubes have a high thermal conductivity, while steel tubes achieve stable heat exchange under high temperature and high pressure environments by optimizing the tube wall thickness and structural strength. Both can accelerate the steam condensation and liquefaction process.

[0048] It should be noted that this embodiment does not limit the specific heat exchange method of the heat exchange tube 400, which can be implemented based on any one or a combination of the following methods: including but not limited to slowing down the gas flow rate by expanding the diameter, setting heat exchange fins, and using spiral pipes to extend the heat exchange time between the gas and the environment, thereby achieving natural cooling and liquefaction; using a water-cooled structure (such as water storage inside or outside the heat exchange tube 400) to enhance heat exchange efficiency; and integrating active cooling structures such as semiconductor refrigeration structures to achieve active cooling. Those skilled in the art can design the heat exchange method of the heat exchange tube 400 according to actual needs, as long as the heat exchange tube 400 can achieve heat exchange with the gas flowing through it, causing it to liquefy.

[0049] The first valve body 500 is connected to the steam generator 200 and the steam nozzle 100, and is used to control the opening or closing of the steam generating pipeline 10. When the first valve body 500 controls the steam generating pipeline 10 to open, the steam generated by the steam generator 200 can be discharged through the steam nozzle 100. When the first valve body 500 controls the steam generating pipeline 10 to close, the residual steam generated by the steam generator 200 can flow into the heat exchange tube 400 and be liquefied by the heat exchange tube 400 before being discharged into the water receiving component 300.

[0050] For example, the first valve body 500 includes a solenoid valve, which has the advantages of simple structure and high reliability. As a further example, the first valve body 500 includes a two-way solenoid valve.

[0051] Understandably, when the first valve body 500 controls the steam generating pipeline 10 to be open, the steam generated by the steam generating device 200 can be discharged through the steam nozzle 100 under pressure. When the first valve body 500 controls the steam generating pipeline 10 to be blocked, the steam generating device 200 stops working, but it still has residual heat and can still generate a certain amount of residual steam. Moreover, the steam generating device 200 is in a high-pressure environment. In order to avoid damage to the steam generating device 200 under high pressure, this embodiment designs a pressure relief pipeline 20. After the steam generating device 200 stops working, the residual steam generated by the steam generating device 200 can flow to the heat exchange tube 400 under pressure. Heat exchange occurs in the heat exchange tube 400, and after cooling and depressurization, liquid is formed and flows into the water receiving component 300.

[0052] This invention achieves safe pressure relief and efficient handling of residual steam in the coffee machine's steam system through the pressure relief pipe 20. This ensures long-term stable operation of the equipment while maintaining a dry and clean internal environment. When the steam function is turned off, the first valve body 500 blocks the steam generating pipe 10. The high-pressure residual steam remaining in the steam generating device 200 automatically flows to the pressure relief pipe 20 under pressure. After heat exchange and liquefaction via the heat exchange pipe 400, it is directed into the water receiving component 300. On one hand, this effectively eliminates the high-pressure risk caused by residual steam retention in existing products, preventing damage to pipes and sealing elements due to high pressure. On the other hand, the residual steam is forcibly condensed into liquid water during the pressure relief process and collected and stored by the water receiving component 300. This prevents water vapor from directly entering the coffee machine's internal cavity, preventing moisture-induced short circuits in precision components such as circuit boards and sensors, or corrosion of metal structures, thus extending the product's lifespan.

[0053] It is worth noting that in some embodiments, the heat exchange tube 400 may only serve as a component of the pressure relief pipe 20. That is, the heat exchange tube 400 only functions when the first valve body 500 is closed and pressure relief is required. More specifically, the steam generator 200 has an inlet 210 for communicating with the water supply component, an outlet 220 for communicating with the steam nozzle 100, and a port structure for communicating with the heat exchange tube 400. This allows the residual steam in the steam generator 200 to flow to the heat exchange tube 400 when the first valve body 500 controls the steam generator pipe 10 to be blocked. Furthermore, the pressure relief pipe 20 is also equipped with a valve body for controlling the flow direction, such as a solenoid valve or a check valve, to control the opening and closing of the pressure relief pipe 20.

[0054] In other embodiments, the heat exchange tube 400 can also serve as a component of both the pressure relief pipe 20 and the steam generating pipe 10. More specifically, the steam generating device 200 has an inlet 210 and an outlet 220. The outlet 220 is connected to the steam nozzle 100, and the inlet 210 is connected to the first port 410 of the heat exchange tube 400. The second port 420 of the heat exchange tube 400 is connected to both the water receiving component 300 and the water supply component of the steam generating pipe 10 via a piping design. Thus, when the first valve body 500 controls the steam generating pipe 10 to open, the water from the water supply component flows sequentially through the second port 420 and the first port 410 of the heat exchange tube 400 before exiting the steam generator. The steam flows into the steam generator 200 through the inlet 210 of the device 200. After being heated by the steam generator 200, the steam is discharged through the steam nozzle 100. When the first valve body 500 controls the steam generation pipeline 10 to be blocked, the residual steam generated in the steam generator 200 flows out from the inlet 210 of the steam generator 200 under pressure, enters the heat exchange tube 400 through the first port 410, and after being liquefied by heat exchange, flows from the second port 420 of the heat exchange tube 400 to the water receiving component 300. Furthermore, the pressure relief pipeline 20 is also equipped with a valve body to control the flow direction, such as a solenoid valve or a check valve, to control the opening and closing of the pressure relief pipeline 20.

[0055] like Figure 2 As shown, based on the above embodiment, this embodiment further specifies that the inner diameter of the heat exchange tube 400 is larger than the inner diameter of the pipeline between the heat exchange tube 400 and the steam generator 200. More specifically, the inner diameter of the heat exchange tube 400 in this embodiment refers to the smallest radial dimension of the heat exchange tube 400.

[0056] By setting the inner diameter of the heat exchange tube 400 to be larger than the inner diameter of the pipe connecting it to the steam generator 200, the residual steam flows from the steam generator 200 to the heat exchange tube 400 from a narrower diameter to a wider diameter. This reduces the flow velocity and pressure of the residual steam in the heat exchange tube 400, prolonging the heat exchange time within it. This provides sufficient time for the heat exchange process to ensure efficient liquefaction of the residual steam and avoids incomplete heat exchange. Furthermore, the liquefied liquid flows towards the water receiving component 300 at a lower velocity, reducing impact force. This is particularly beneficial in designs where the water receiving component 300 is externally open, helping to prevent scalding from splashing.

[0057] like Figure 3 , Figure 4 and Figure 5 As shown, based on any of the above embodiments, this embodiment further defines the inner diameter of the second port 420 as smaller than the inner diameter of the first port 410.

[0058] In this embodiment, the first port 410 of the heat exchange tube 400 is the inlet for the residual steam to flow into the pressure relief pipe 20, and the second port 420 is the outlet 220 for the liquefied liquid to flow out of the pressure relief pipe 20. The inner diameter of the second port 420 is designed to be smaller than the inner diameter of the first port 410, that is, the inner diameter of the outlet 220 is smaller than the inlet. This helps to slow down the discharge rate of the liquefied liquid, so that the residual steam can fully exchange heat inside the heat exchange tube 400 and ensure full liquefaction.

[0059] Furthermore, the inner diameter of the second opening 420 is greater than or equal to 0.6 mm and less than or equal to 2.4 mm. Preferably, the inner diameter of the second opening 420 is 1.2 mm.

[0060] While ensuring the complete liquefaction of residual vapor, the liquefied water can be discharged smoothly, achieving efficient liquefaction and preventing blockage.

[0061] Based on any of the above embodiments, this embodiment further specifies that the coffee machine also includes a water tank 600, which is connected to the heat exchange tube 400 and is configured to supply water to the heat exchange tube 400.

[0062] In this embodiment, a water tank 600 connected to the heat exchange tube 400 is provided. The water tank 600 can supply water to the heat exchange tube 400, so that liquid water is stored in the heat exchange tube 400. On the one hand, when the residual steam enters the heat exchange tube 400 under pressure, the stored water is pushed by the residual steam pressure and discharged directionally into the water receiving component 300. The stored water in the heat exchange tube 400 forms a liquid seal barrier, which avoids the situation where the residual steam is discharged without heat exchange and liquefaction. On the other hand, the stored water can slow down the flow rate of the residual steam and prolong the heat exchange time of the residual steam in the heat exchange tube 400. At the same time, the stored water, as a medium with high specific heat capacity, can directly absorb the heat of the residual steam and accelerate the liquefaction of the residual steam, further ensuring that the residual steam can be fully liquefied in the heat exchange tube 400.

[0063] It is worth noting that in some embodiments, the water tank 600 may only serve as a component dedicated to supplying water to the heat exchange tube 400, without needing to supply water to the steam generator 200, which may be supplied with water by other water supply components.

[0064] In other embodiments, the water tank 600 can supply water to both the heat exchange tube 400 and the steam generator 200. For example, the water tank 600 has two drain outlets, one of which is connected to the heat exchange tube 400 and the other is connected to the steam generator 200. In this way, the water tank 600 has the function of supplying water to both the heat exchange tube 400 and the steam generator 200, and the product has fewer parts.

[0065] In one specific embodiment, the steam generator 200 has an inlet 210 and an outlet 220, the outlet 220 being connected to the steam nozzle 100, the inlet 210 being connected to the first port 410, and the water tank 600 and the heat exchange tube 400 forming part of the steam generating pipeline 10.

[0066] In this way, the pressure relief pipe 20 is set on one side of the inlet 210 of the steam generator 200. When the first valve body 500 blocks the steam generator pipe 10, the residual steam generated by the high temperature of the steam generator 200 can flow along the inlet 210 to the heat exchange tube 400, avoiding the residual steam from flowing towards the steam nozzle 100 and extending the service life of the product on the steam nozzle 100 side.

[0067] The coffee machine also includes a second valve body 700, which has a first port 710, a second port 720 and a third port 730. The first port 710 is connected to the second port 420, the second port 720 is connected to the water tank 600, and the third port 730 is connected to the water receiving component 300. When the second valve body 700 connects the first port 710 and the second port 720, the steam generating pipeline 10 is connected. When the second valve body 700 connects the first port 710 and the third port 730, the pressure relief pipeline 20 is connected.

[0068] When steam generation pipeline 10 is required to generate steam, the first valve body 500 controls the steam generation pipeline 10 to be open, and the second valve body 700 controls the first port 710 and the second port 720 to be open, while the first port 710 and the third port 730 are blocked. Water in the water tank 600 flows into the heat exchange tube 400 through the second port 720 and the first port 710 of the second valve body 700 and the second port 420 of the heat exchange tube 400 in sequence. After passing through the first port 410 of the heat exchange tube 400 and the inlet 210 of the steam generator 200, it flows into the steam generator 200. The steam generator 200 heats the water to form steam, and the steam continues to flow from the outlet 220 of the steam generator 200 to the steam nozzle 100 and is then discharged to achieve milk frothing.

[0069] When the steam generating pipeline 10 stops working and pressure needs to be released, the first valve body 500 controls the steam generating pipeline 10 to be blocked, and the second valve body 700 controls the first port 710 and the third port 730 to be open, while the first port 710 and the second port 720 are blocked. The residual steam generated by the high temperature of the steam generating device 200 flows into the heat exchange tube 400 through the inlet 210 of the steam generating device 200 and the first port 410 of the heat exchange tube 400. Understandably, some of the water flowing from the water tank 600 to the heat exchange tube 400 when the steam generating pipeline 10 is working is retained in the heat exchange tube 400. The residual steam is fully liquefied by heat exchange in the heat exchange tube 400, and under the action of pressure, it drives the water in the heat exchange tube 400 to flow from the second port 420 of the heat exchange tube 400 through the first port 710 and the third port 730 of the second valve body 700 to the water receiving component 300 to achieve pressure release.

[0070] While ensuring steam generation and pressure relief, the water tank 600 and heat exchange tube 400 are designed as shared components of the steam generation pipeline 10 and the pressure relief pipeline 20, reducing the number of parts, simplifying the product structure, and achieving miniaturization and compact design. Furthermore, in the direction of residual steam flow, the heat exchange tube 400 is designed upstream of the second valve body 700, ensuring that only liquid flows through the second valve body 700 during both steam generation and pressure relief processes, extending the service life of the second valve body 700 and ensuring its reliability.

[0071] Based on any of the above embodiments, the vertical height of the second port 420 is lower than the lowest point of the water tank 600. By setting the vertical height of the second port 420 of the heat exchange tube 400 to be lower than the lowest point of the water tank 600, gravity is used to ensure that liquid water is always present in the heat exchange tube 400. When residual steam enters the heat exchange tube 400, it can directly contact the stored water to accelerate condensation and liquefaction. At the same time, the gravitational potential energy drives the liquefied water to drain into the water receiving component 300 to prevent backflow.

[0072] Based on any of the above embodiments, the vertical height of the water receiving component 300 is lower than that of the second port 420. By setting the vertical height of the water receiving component 300 to be lower than that of the second port 420, when the pressure relief pipe 20 is opened, the water in the heat exchange tube 400 can flow to the water receiving component 300 under the action of gravity, preventing backflow.

[0073] Based on any of the above embodiments, the coffee machine further includes a drive component 800, which is connected to the water tank 600 and configured to drive the water in the water tank 600 to flow towards the heat exchange tube 400. For example, the drive component 800 is a water pump. The drive component 800 provides driving force to the water in the water tank 600.

[0074] Based on any of the above embodiments, at least one heat exchange plate is provided inside the heat exchange tube 400. The heat exchange plate increases the contact area between the residual steam and the heat exchange tube 400, accelerates the heat transfer between the residual steam and the tube wall and the heat exchange plate, improves the heat exchange efficiency, and ensures full liquefaction.

[0075] Optionally, the heat exchange fins extend along the direction from the second port 420 to the first port 410. This increases the heat exchange contact area while reducing fluid resistance. Especially in technical solutions where the heat exchange tube 400 is formed as part of the steam generating pipeline 10, it can ensure that the water supply rate to the steam generating device 200 is not affected when the steam generating pipeline 10 is working, avoid dry burning, and ensure steam generation efficiency.

[0076] Optionally, the heat exchange fins are spirally extended. The spirally extended heat exchange fins allow the residual steam to flow along the spiral direction within the heat exchange tube 400, extending the flow path of the residual steam and slowing down its flow velocity, thus ensuring sufficient heat exchange. This is particularly suitable for technical solutions where the heat exchange tube 400 is only a part of the pressure relief pipe 20.

[0077] Based on any of the above embodiments, a number of heat dissipation fins are provided on the outside of the heat exchange tube 400. By adding heat dissipation fins to the outer wall of the heat exchange tube 400, the heat exchange area between the heat exchange tube 400 and the external environment is expanded, the natural cooling efficiency is further improved, and the internal flow channel is not interfered with, which is conducive to ensuring the flow rate of the fluid inside the heat exchange tube 400.

[0078] Based on any of the above embodiments, the coffee machine also includes a housing, a steam generator 200, a heat exchange pipe 400 and a first valve body 500 disposed inside the housing, and a steam nozzle 100 disposed on the housing. The housing is provided with a plurality of heat dissipation holes at the positions corresponding to the heat exchange pipe 400.

[0079] By setting heat dissipation holes at the corresponding positions of the heat exchange tube 400 in the casing, the heat exchange tube 400 is enhanced to improve the heat exchange with the environment, accelerate the liquefaction process of residual vapor, and transfer heat to the environment through the heat dissipation holes, thereby preventing heat accumulation inside the casing and extending the service life of the product.

[0080] Furthermore, coffee machines also include fans to drive airflow, further improving heat exchange efficiency.

[0081] Based on any of the above embodiments, the coffee machine also includes a housing, with a steam generator 200, a heat exchange tube 400, and a first valve body 500 disposed inside the housing, and a steam nozzle 100 disposed on the housing. A water receiving component 300 is detachably disposed on the housing. This design of the water receiving component 300 as a detachable part allows for convenient water dispensing by the user.

[0082] Based on any of the above embodiments, the coffee machine further includes a housing and a drip tray. A steam generator 200, a heat exchange tube 400, and a first valve body 500 are disposed within the housing. A steam nozzle 100 is disposed on the housing. The drip tray is detachably disposed on the housing and is positioned opposite the coffee machine's dispensing nozzle. The housing has a through hole at the position opposite the drip tray, and a second port 420 communicates with the through hole via a connecting pipe. The drip tray is formed as a drip receiving component 300. In this embodiment, the drip receiving component 300 is integrated into the coffee machine's drip tray. The drip tray can collect both liquid dripping from the dispensing nozzle and liquid liquefied by the heat exchange tube 400, reducing the number of parts, simplifying the structure, and achieving a miniaturized and compact design.

[0083] 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.

[0084] 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 coffee machine, characterized in that, include: Steam nozzle; A steam generator is connected to the steam nozzle, and the steam nozzle and the steam generator form part of a steam generation pipeline. Water receiving components; The heat exchange tube has a first port and a second port. The first port is connected to the steam generator, and the second port is connected to the water receiving component. The water receiving component and the heat exchange tube form part of a pressure relief pipeline. The first valve body is connected to the steam generator and the steam nozzle, and is used to control the opening or closing of the steam generating pipeline. When the first valve body controls the steam generating pipeline to open, the steam generated by the steam generator can be discharged through the steam nozzle. When the first valve body controls the steam generating pipeline to close, the residual steam generated by the steam generator can flow into the heat exchange tube and be liquefied by the heat exchange tube before being discharged into the water receiving component.

2. The coffee machine according to claim 1, characterized in that, The inner diameter of the heat exchange tube is larger than the inner diameter of the pipe between the heat exchange tube and the steam generator.

3. The coffee machine according to claim 1 or 2, characterized in that, The inner diameter of the second opening is smaller than the inner diameter of the first opening.

4. The coffee machine according to claim 3, characterized in that, The inner diameter of the second opening is greater than or equal to 0.6 mm and less than or equal to 2.4 mm; The inner diameter of the second opening is 1.2 mm.

5. The coffee machine according to claim 1 or 2, characterized in that, Also includes: A water tank, connected to the heat exchange tube, is configured to supply water to the heat exchange tube.

6. The coffee machine according to claim 5, characterized in that, The steam generator has an inlet and an outlet, the outlet is connected to the steam nozzle, the inlet is connected to the first port, and the water tank and the heat exchange tube form part of the steam generating pipeline; The coffee machine also includes a second valve body having a first port, a second port, and a third port. The first port is connected to the second port, the second port is connected to the water tank, and the third port is connected to the water receiving component. When the second valve body connects the first port and the second port, the steam generating pipeline is connected. When the second valve body connects the first port and the third port, the pressure relief pipeline is connected.

7. The coffee machine according to claim 5, characterized in that, The vertical height of the second opening is lower than the lowest point of the water tank; and / or The vertical height of the water receiving component is lower than that of the second inlet; and / or The coffee machine also includes a drive unit connected to the water tank and configured to drive the water in the water tank to flow to the heat exchange tube.

8. The coffee machine according to claim 1 or 2, characterized in that, The heat exchange tube is provided with at least one heat exchange plate; The heat exchange plate extends along the direction from the second port to the first port, or the heat exchange plate extends spirally; and / or The heat exchange tube is equipped with several heat dissipation fins.

9. The coffee machine according to claim 1 or 2, characterized in that, Also includes: The steam generator, the heat exchange tube, and the first valve body are disposed within the housing, and the steam nozzle is disposed on the housing. The casing has several heat dissipation holes corresponding to the location of the heat exchange tube.

10. The coffee machine according to claim 1 or 2, characterized in that, The coffee machine also includes a housing, within which the steam generator, the heat exchange pipe, and the first valve body are disposed, and the steam nozzle is disposed on the housing; wherein... The water receiving component is detachably mounted on the housing, or the coffee machine further includes a water receiving tray, which is detachably mounted on the housing and positioned opposite the dispensing nozzle of the coffee machine. The housing has a through hole at the position opposite the water receiving tray, and the second port is connected to the through hole via a connecting pipe. The water receiving tray is formed as the water receiving component.

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