Coffee machine and steam module

Abstract

The utility model relates to the technical field of household appliances, in particular to a coffee machine and a steam module. Due to the fact that the steam inner pipe of the steam module is installed in the outer pipe in the penetrating mode, the heat transfer speed from the steam inner pipe to the outer pipe and the temperature rising speed of the outer pipe can be reduced through the heat insulation space between the outer pipe and the steam inner pipe, the outer pipe is not prone to scalding hands, and the problem that the outer pipe of the coffee maker is prone to scalding the hands is solved. In addition, the outer pipe is connected to the top of the shell, the spray head end of the outer pipe is lower than the connecting end, the position design of the steam spray head is facilitated, the sensor connecting wire penetrates into the outer pipe to facilitate wiring, and when the steam inner pipe and the sensor connecting wire are installed, the inner wall face of the bent section of the outer pipe is smooth to facilitate installation.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a coffee machine and a steam module. Background Art

[0002] Making coffee using a coffee machine usually includes grinding coffee beans, extracting coffee powder and making milk foam. Milk foam is usually made using the nozzle of a steam wand. When in use, the nozzle of the steam wand is inserted below the milk liquid level. The steam sprayed from the nozzle can heat the milk and produce milk foam at the same time. However, the outer tube of the current steam wand is usually a metal tube. When the steam flows in the outer tube, it will heat the outer tube. After the outer tube is heated, it is easy to burn your hands, which poses a great safety hazard. Utility Model Content

[0003] The present application provides a steam module for improving the problem that the outer tube of the current coffee machine is easily scalded. In addition, the purpose of the present application is also to provide a coffee machine using the steam module.

[0004] In a first aspect, an embodiment provides a steam module, comprising:

[0005] case;

[0006] a steam generating module, the steam generating module being installed in the housing and used for generating steam;

[0007] An outer tube, one end of the outer tube is a connecting end, and the other end is a nozzle end, the connecting end is connected to the top of the shell, and the nozzle end includes a steam nozzle;

[0008] A temperature sensor, the temperature sensor is installed on the nozzle end;

[0009] A sensor connecting line, the sensor connecting line is connected to the temperature measuring sensor and is used to transmit measurement data of the temperature measuring sensor;

[0010] and a steam inner tube, one end of which is connected to the steam generating module, and the other end of which is connected to the steam nozzle, for conveying steam to the steam nozzle;

[0011] The steam inner tube and the temperature measuring connecting line are both installed in the outer tube, and an insulating space is formed between the steam inner tube and the outer tube; the nozzle end is lower than the connecting end, the outer tube has at least one curved section, the inner wall surface of the curved section is a smooth curved surface, and the temperature measuring connecting line and the steam inner tube both pass through the curved section.

[0012] Furthermore, in one embodiment, at least a portion of the curved section is curved in an arc shape.

[0013] Furthermore, in one embodiment, the outer tube includes a straight tube section, the straight tube section is connected to the curved section, and the connection between the straight tube section and the curved section has a smooth transition.

[0014] Furthermore, in one embodiment, the straight pipe section and the curved section are arranged in a U shape.

[0015] Furthermore, in one embodiment, the portion of the sensor connecting line in the curved section is a curved section winding portion, and the curved section winding portion is wound around the outer circumference of the steam inner pipe.

[0016] Furthermore, in one embodiment, the sensor connecting wire is spirally wound around the outer circumference of the steam inner tube.

[0017] Furthermore, in one embodiment, the connecting end includes a ball head, and the ball head is movably mounted on the top of the shell. A ball head pressure cover is provided on the shell, and the ball head pressure cover can limit the swing angle of the ball head.

[0018] Furthermore, in one embodiment, the nozzle end is located on one side of the shell in the horizontal direction, the connecting end is movably connected to the shell, and the connecting end can rotate horizontally relative to the shell.

[0019] In a second aspect, an embodiment provides a coffee machine, including a grinding module and a steam module, wherein the steam module includes:

[0020] case;

[0021] a steam generating module, the steam generating module being installed in the housing and used for generating steam;

[0022] An outer tube, one end of the outer tube is a connecting end, and the other end is a nozzle end, the connecting end is connected to the top of the shell, and the nozzle end includes a steam nozzle;

[0023] A temperature sensor, the temperature sensor is installed on the nozzle end;

[0024] A sensor connecting line, the sensor connecting line is connected to the temperature measuring sensor and is used to transmit measurement data of the temperature measuring sensor;

[0025] and a steam inner tube, one end of which is connected to the steam generating module, and the other end of which is connected to the steam nozzle, for conveying steam to the steam nozzle;

[0026] The steam inner tube and the temperature measuring connecting line are both installed in the outer tube, and an insulating space is formed between the steam inner tube and the outer tube; the nozzle end is lower than the connecting end, the outer tube has at least one curved section, the inner wall surface of the curved section is a smooth curved surface, and the temperature measuring connecting line and the steam inner tube both pass through the curved section.

[0027] Furthermore, in one embodiment, at least a portion of the curved section is curved in an arc shape.

[0028] Furthermore, in one embodiment, the outer tube includes a straight tube section, the straight tube section is connected to the curved section, and the connection between the straight tube section and the curved section has a smooth transition.

[0029] Furthermore, in one embodiment, the straight pipe section and the curved section are arranged in a U shape.

[0030] Furthermore, in one embodiment, the portion of the sensor connecting line in the curved section is a curved section winding portion, and the curved section winding portion is wound around the outer circumference of the steam inner pipe.

[0031] Furthermore, in one embodiment, the winding portion of the curved section is wound in a spiral shape.

[0032] Furthermore, in one embodiment, the sensor connecting wire is spirally wound around the outer circumference of the steam inner tube.

[0033] Furthermore, in one embodiment, the connecting end includes a ball head, and the ball head is movably mounted on the top of the shell. A ball head pressure cover is provided on the shell, and the ball head pressure cover can limit the swing angle of the ball head.

[0034] Furthermore, in one embodiment, the nozzle end is located on one side of the shell in the horizontal direction, the connecting end is movably connected to the shell, and the connecting end can rotate horizontally relative to the shell.

[0035] In a third aspect, an embodiment provides a steam module, the steam module comprising:

[0036] case;

[0037] a steam generating module, the steam generating module being installed in the housing and used for generating steam;

[0038] An outer tube, one end of the outer tube is a connecting end, and the other end is a nozzle end, the connecting end is connected to the shell, and the nozzle end includes a steam nozzle;

[0039] A temperature sensor, the temperature sensor is installed on the nozzle end;

[0040] A sensor connecting line, the sensor connecting line is connected to the temperature measuring sensor and is used to transmit measurement data of the temperature measuring sensor;

[0041] and a steam inner tube, one end of which is connected to the steam generating module, and the other end of which is connected to the steam nozzle, for conveying steam to the steam nozzle;

[0042] The steam inner tube and the temperature measuring connecting wire are at least partially wound and installed in the outer tube, and a heat insulating space is formed between the steam inner tube and the outer tube.

[0043] According to the steam module of the above embodiment, since the steam inner tube of the steam module is installed in the outer tube, the heat transfer speed from the steam inner tube to the outer tube can be slowed down through the insulation space between the outer tube and the steam inner tube, and the heating speed of the outer tube is reduced, so that the outer tube is not easy to burn the hand, thereby improving the problem that the outer tube of the coffee maker is easy to burn the hand.

[0044] In addition, the outer tube is connected to the top of the shell, and the nozzle end of the outer tube is lower than the connection end, which is convenient for the position design of the steam nozzle, and the sensor connecting line is installed in the outer tube for easy wiring. The inner wall surface of the curved section of the outer tube is smooth, which is convenient for the installation of the steam inner tube and the sensor connecting line. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of the structure of a steam module in an embodiment;

[0046] Figure 2 A cross-sectional view of a part of the structure in one embodiment;

[0047] Figure 3 A partial structural schematic diagram of an embodiment;

[0048] Figure 4 This is a schematic diagram of the structure inside the outer tube in one embodiment;

[0049] Figure 5 A schematic diagram of a structure in which a sensor connecting wire is wound around the outer periphery of a steam inner tube in an embodiment;

[0050] Figure 6 Schematic diagram of the installation of the steam inner pipe and the sensor connecting line in one embodiment.

[0051] List of feature names corresponding to the figure marks in the figure: 1. Shell; 11. Shell cover; 12. Bottom shell; 13. Ball head pressure cover; 14. Screw; 2. Outer tube; 21. Connection end; 211. Ball head; 22. Nozzle end; 23. Steam nozzle; 231. Nozzle shell; 232. Pipe joint; 233. Steam diverter cover; 234. Fixing bracket; 235. Silicone sleeve; 236. Nozzle; 24. Insulation space; 25. Bend section; 26. Straight pipe section; 27. Pipe body; 3. Temperature sensor; 31. Temperature measuring head; 4. Sensor connecting line; 41. Winding part of the bend section; 5. Steam inner tube.

[0052] Explanation on the reference numerals in brackets in the drawings: In the reference numerals in brackets in the drawings, the features referred to by the reference numerals are both the features represented by the numbers in the brackets and the features represented by the numbers outside the brackets. DETAILED DESCRIPTION

[0053] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0054] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0055] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0056] In one embodiment, the coffee machine includes a grinding module, an extraction module and a steam module, wherein the grinding module is used to grind coffee beans, the extraction module is used to extract coffee powder, and the steam module is used to provide steam for making milk froth. In one embodiment, the coffee machine includes a base, and the grinding module, the extraction module and the steam module are all installed on the base.

[0057] In one embodiment, please refer to Figure 1 and Figure 2 The steam module includes a shell 1, a steam generating module, an outer tube 2, a temperature sensor 3, a sensor connecting line 4 and a steam inner tube 5. The steam generating module is installed in the shell 1 and is used to generate steam.

[0058] One end of the outer tube 2 is a connection end 21, and the other end is a nozzle end 22, the connection end 21 is connected to the shell 1, the nozzle end 22 has a steam nozzle 23, and the temperature sensor 3 is installed at the nozzle end 22. In one embodiment, the connection end 21 is connected to the top of the shell 1, and the nozzle end 22 is lower than the connection end 21.

[0059] It should be noted that the end in this application refers to an area with a certain length at the end of a part, and is not limited to the end face of the part. The top of the shell 1 is the top of the shell 1 or a position close to the top. When the shell 1 has multiple horizontal planes, the top of the shell 1 can also be understood as being located on any horizontal plane. As long as the connection end 21 is connected to the top of the shell 1, the initial extension direction of the connection end 21 is basically perpendicular to the placement plane of the coffee machine and faces upward.

[0060] In one embodiment, the temperature sensor 3 can obtain the temperature of the milk when the steam nozzle 23 is immersed in the milk. The sensor connection line 4 is connected to the temperature sensor 3 to transmit the measurement data of the temperature sensor 3 and transmit the temperature information measured by the temperature sensor 3 to the display module or the control module.

[0061] One end of the steam inner tube 5 is communicated with the steam generating module, and the other end is communicated with the steam spray head 23 for conveying steam to the steam spray head 23 .

[0062] In one embodiment, in order to reduce the heat transfer rate from steam to the shell 1, the steam inner tube 5 and the sensor connecting line 4 are both installed in the outer tube 2, and an insulating space 24 is formed between the steam inner tube 5 and the outer tube 2. The insulating space 24 can reduce the heat transfer rate from the steam inner tube 5 to the outer tube 2, thereby reducing the temperature of the outer tube 2.

[0063] In one embodiment, the steam inner tube 5 and the temperature measuring connecting wire 4 are at least partially wound and installed in the outer tube 2. The temperature measuring connecting wire 4 can be wound on the steam inner tube 5 in any feasible manner such as a spiral shape, a reciprocating bending shape, etc. In some other embodiments, the temperature measuring connecting wire 4 can also extend through the outer tube 2 in parallel with the steam inner tube 5, and the temperature measuring connecting wire is not wound on the steam inner tube 5.

[0064] In one embodiment, the outer tube 2 has at least one curved section 25, the inner wall surface of the curved section 25 is a smooth curved surface, and the sensor connecting line 4 and the steam inner tube 5 both pass through the curved section 25. The inner wall surface of the curved section 25 is a smooth curved surface, which facilitates the installation of the steam inner tube 5 and the sensor connecting line 4.

[0065] In one embodiment, the inner wall and the outer wall of the curved section 25 are both smooth curved surfaces. In some other embodiments, when the wall thickness of the outer tube is uneven, the inner wall of the curved section may be a smooth curved surface, while the outer wall may have protrusions or edges.

[0066] Regarding the steam generating module, in one embodiment, the steam generating module may be an electric boiler or other device capable of generating steam. The steam inner pipe 5 is in communication with the steam generating module, and the steam generated by the steam generating module may be transported to the steam nozzle 23 through the steam inner pipe 5 .

[0067] In one embodiment, please refer to Figure 1 and Figure 2 The connection end 21 is movably connected to the shell 1 and can rotate horizontally relative to the shell 1, so that the position of the outer tube 2 can be easily changed according to the needs of the user. The connection end 21 is at the top of the shell 1, and the nozzle end 22 is at one side of the shell 1 in the horizontal direction. The rotation of the connection end 21 can achieve a wide range of adjustment of the position of the nozzle end 22 on the periphery of the shell 1. Specifically, in one embodiment, the connection end 21 is movably installed at the center of the top surface of the shell 1.

[0068] In one embodiment, please refer to Figure 1 and Figure 2 The housing 1 includes a housing cover 11 and a bottom housing 12, the housing cover 11 and the bottom housing 12 are detachably connected, and the connecting end 21 is movably connected to the housing cover 11 and can rotate horizontally relative to the housing cover 11. The connecting end 21 is installed at the center of the housing cover 11. In some other embodiments, the connecting end 21 can also be installed at the edge of the housing cover 11.

[0069] In one embodiment, please refer to Figure 2 and Figure 3The connection end 21 includes a ball head 211, which is movably mounted on the top of the housing 1. The housing 1 is provided with a ball head pressure cover 13, which can limit the swing angle of the ball head 211. Specifically, in one embodiment, the ball head pressure cover 13 is located on the side of the housing cover 11 facing the inside of the housing 1, and the ball head pressure cover 13 is fixed to the housing cover 11 by screws 14. In one embodiment, the ball head pressure cover 13 limits the maximum left and right swing angle of the ball head 211 to 20 degrees, but does not affect the 360-degree rotation of the ball head 211 with the vertically extending rotation axis as the center.

[0070] In one embodiment, please refer to Figure 2 and Figure 3 In order to further facilitate the installation of the steam inner pipe 5, at least a part of the curved section 25 is curved in an arc shape.

[0071] During the process of the steam inner tube 5 passing through the outer tube 2, the arc-shaped curved section 25 can better prevent the steam inner tube 5 from getting stuck in the curved section 25, so that the steam inner tube 5 can be passed through more smoothly. In one embodiment, the central angle corresponding to the curved section 25 is not less than 90 degrees, for example, the central angle corresponding to the curved section 25 can be 120 degrees or 180 degrees. Of course, in some other embodiments, the central angle corresponding to the curved section can also be less than 90 degrees.

[0072] Of course, in some other embodiments, in addition to the arc-shaped bend, the bend section 25 may also be any other feasible bend form, for example, the bend section 25 is an irregularly shaped bend.

[0073] In one embodiment, please refer to Figure 2 and Figure 3 The outer tube 2 includes a straight tube section 26, which is connected to the curved section 25, and the connection between the straight tube section 26 and the curved section 25 is smoothly transitioned. In one embodiment, the straight tube section 26 and the curved section 25 are arranged in a U shape, that is, the outer tube 2 is U-shaped as a whole.

[0074] In one embodiment, please refer to Figure 2 , there are two straight pipe sections 26, there are two curved sections 25, two curved sections 25 are connected, one straight pipe section 26 is connected to both ends of one curved section 25, and the other straight pipe section 26 is connected to the other curved section 25. One of the two straight pipe sections 26 is a long straight pipe section 26, and the other is a short straight pipe section 26. The steam nozzle 23 is at one end of the long straight pipe section 26, and the connecting end 21 is at one end of the short straight pipe section 26. Both curved sections 25 are curved in an arc shape, and the arc radii corresponding to the two curved sections 25 are different. Specifically, in one embodiment, please refer to Figure 2In the two bending sections 25, the bending radius of one bending section 25 is 50 mm, and the bending radius of the other bending section 25 is 59.5 mm. In some other embodiments, the number of the bending section 25 can be one, and the bending section 25 is curved in an arc shape as a whole. Figure 2 The outer tube 2 has tangential transitions at A1, A2, and A3, and the steam inner tube 5 will not encounter sudden changes in the structure during the installation process and can pass through the outer tube 2 smoothly.

[0075] In some other embodiments, the number of the straight pipe section 26 may be one, in which case the connection end 21 is at one end of the curved section 25, and the curved section 25 is directly connected to the housing 1. In some other embodiments, the number of the curved sections 25 may be increased as needed, for example, there may be more than two curved sections 25, and adjacent curved sections 25 may also be connected via straight pipe sections 26.

[0076] Since the steam inner tube 5 needs to be installed, the steam inner tube 5 should be made of a material that allows elastic deformation. For example, in one embodiment, the steam inner tube 5 is a silicone tube. For another example, the steam inner tube 5 is a rubber tube or an elastic plastic tube. In one embodiment, the steam inner tube 5 is a tube with a diameter of 6 mm.

[0077] In one embodiment, please refer to Figures 2 to 4 , the steam nozzle 23 is threadedly connected with the straight pipe section 26. The steam nozzle 23 includes a nozzle shell 231 and a pipe joint 232 in the nozzle shell 231, and the pipe joint 232 is plugged and fixed with the steam inner tube 5. The steam nozzle 23 also includes a steam diversion cover 233, and the steam diversion cover 233 is used to disperse the steam entering the steam nozzle 23. The steam nozzle 23 includes a fixing frame 234 fixed in the nozzle shell 231, and the temperature sensor 3 is fixed on the fixing frame 234. The temperature measuring head 31 of the temperature measuring sensor 3 extends out of the steam nozzle 23, which is convenient for temperature measurement. In order to improve the stability of the temperature measuring sensor 3, the steam nozzle 23 also includes a silicone sleeve 235 wrapped around the outer periphery of the temperature measuring sensor 3, and the silicone sleeve 235 is arranged in the nozzle shell 231, which can play a role in sealing and fixing the temperature measuring sensor 3. It can be understood that the way in which the temperature measuring head 31 extends out of the steam nozzle 23 can be to extend from the middle of the steam nozzle 23, or to extend from the side of the steam nozzle 23. In other embodiments, the temperature measuring head 31 may also not have the silicone sleeve 235, and is directly connected to the inner wall surface of the steam spray head 23, and the connection methods include abutting connection, welding, etc.

[0078] In some embodiments, the fixing frame 234 is detachably connected to the spray head shell 231. The steam spray head 23 further includes a nozzle 236 fixed to the spray head shell 231, and the nozzle 236 is detachably connected to the spray head shell 231. Specifically, the nozzle 236 is threadedly connected to the spray head shell 231.

[0079] In one embodiment, please refer to Figure 2 and Figure 4 , the portion of the sensor connecting wire 4 in the curved section 25 is the curved section winding portion 41, and the curved section winding portion 41 is wound around the outer periphery of the steam inner tube 5. By winding the sensor connecting wire 4 around the outer periphery of the steam inner tube 5, the line contact between the steam inner tube 5 and the inner side surface of the outer tube 2 can be reduced or even eliminated. In the curved section 25, when the sensor connecting wire 4 contacts the inner side surface of the outer tube 2, since the direction of the sensor connecting wire 4 is different from that of the outer tube 2, and the outer diameter of the sensor connecting wire 4 is usually smaller than the outer diameter of the steam inner tube 5, the sensor connecting wire 4 and the inner side surface of the outer tube 2 are usually point contact, and the contact area is smaller. The speed at which the heat of the steam inner tube 5 is transferred to the outer tube 2 through the sensor connecting wire 4 is slower, which can better reduce the heat transfer speed from the steam inner tube 5 to the outer tube 2.

[0080] In one embodiment, please refer to Figures 2 to 5 , the curved winding portion 41 is spirally wound. The spiral winding method is simpler to operate. In some other embodiments, in addition to the spiral winding method, other winding methods can also be used, such as the sensor connecting wire 4 is reciprocatedly bent along the circumference of the outer periphery of the steam inner pipe 5.

[0081] In one embodiment, please refer to Figure 2 and Figure 4 Since there are two sensor connecting wires 4, the two sensor connecting wires 4 are wound around the outer periphery of the inner steam pipe in a double helix shape. In some other embodiments, the two sensor connecting wires can also be pre-wound together in a strand shape, and then the two wound sensor connecting wires 4 are wound around the steam inner pipe 5.

[0082] In one embodiment, please refer to Figure 2 , the sensor connecting wire 4 is spirally wound around the outer periphery of the steam inner tube 5. Whether in the straight tube section 26 or the curved section 25, the sensor connecting wire 4 is wound around the outer periphery of the steam inner tube 5, which can better slow down the heat transfer speed from the steam inner tube 5 to the outer tube 2. In some other embodiments, since the steam inner tube 5 in the straight tube section 26 is not easy to contact the inner side of the outer tube 2, the portion of the sensor connecting wire 4 in the straight tube section 26 may not be wound around the steam inner tube 5, but extend in parallel with the steam inner tube 5.

[0083] In some other embodiments, the connection end 21 may be connected to other positions on the shell in addition to being connected to the top of the shell, such as being connected to the middle of the outer peripheral side of the shell, or being connected to the bottom of the outer peripheral side, etc. When the connection end is connected to the middle of the outer periphery of the shell, the outer tube may also be a straight tube arranged obliquely, and in this case, the outer tube has no curved section.

[0084] In one embodiment, please refer to Figure 5 and Figure 6 The nozzle shell 231 is fixedly connected to the tube body 27 of the outer tube 2. The temperature sensor 3 is installed on the fixing frame 234 of the steam nozzle 23, the sensor connecting line 4 is wound on the steam inner tube 5, the fixing frame 234 is arranged in the nozzle shell 231, and the steam inner tube 5 is passed through the outer tube 2.

[0085] In an embodiment of a steam module, the steam module is the steam module described in any one of the above embodiments, and the details are not repeated here.

[0086] The above specific examples are used to illustrate the present application, which is only used to help understand the present application and is not intended to limit the present application. For technicians in the technical field to which the present application belongs, they can also make some simple deductions, deformations or substitutions based on the ideas of the present application.

Claims

1. A steam module, characterized in that: include: case; a steam generating module, the steam generating module being installed in the housing and used for generating steam; An outer tube, one end of the outer tube is a connecting end, and the other end is a nozzle end, the connecting end is connected to the top of the shell, and the nozzle end includes a steam nozzle; A temperature sensor, the temperature sensor is installed on the nozzle end; A sensor connecting line, the sensor connecting line is connected to the temperature measuring sensor and is used to transmit measurement data of the temperature measuring sensor; and a steam inner tube, one end of which is connected to the steam generating module, and the other end of which is connected to the steam nozzle, for conveying steam to the steam nozzle; The steam inner tube and the temperature measuring connecting line are both installed in the outer tube, and an insulating space is formed between the steam inner tube and the outer tube; the nozzle end is lower than the connecting end, the outer tube has at least one curved section, the inner wall surface of the curved section is a smooth curved surface, and the temperature measuring connecting line and the steam inner tube both pass through the curved section.

2. The steam module according to claim 1, characterized in that At least a portion of the curved section is curved in an arc shape.

3. The steam module according to claim 1, characterized in that The outer tube includes a straight tube section, the straight tube section is connected to the curved section, and the connection between the straight tube section and the curved section is smoothly transitioned.

4. The steam module according to claim 3, characterized in that The straight pipe section and the curved section are arranged in a U shape.

5. The steam module according to any one of claims 1 to 4, characterized in that: The portion of the sensor connecting line in the curved section is a curved section winding portion, and the curved section winding portion is wound around the outer circumference of the steam inner pipe.

6. The steam module according to any one of claims 1 to 4, characterized in that: The sensor connecting wire is spirally wound around the outer circumference of the steam inner pipe.

7. The steam module according to any one of claims 1 to 4, characterized in that: The connecting end comprises a ball head, and the ball head is movably mounted on the top of the shell. A ball head pressure cover is provided on the shell, and the ball head pressure cover can limit the swing angle of the ball head.

8. The steam module according to any one of claims 1 to 4, characterized in that: The nozzle end is located at one side of the shell in the horizontal direction, the connection end is movably connected to the shell, and the connection end can rotate horizontally relative to the shell.

9. A coffee machine, comprising a grinding module and a steam module according to any one of claims 1 to 8.

10. A steam module, characterized in that: include: case; a steam generating module, the steam generating module being installed in the housing and used for generating steam; An outer tube, one end of the outer tube is a connecting end, and the other end is a nozzle end, the connecting end is connected to the shell, and the nozzle end includes a steam nozzle; A temperature sensor, the temperature sensor is installed on the nozzle end; A sensor connecting line, the sensor connecting line is connected to the temperature measuring sensor and is used to transmit measurement data of the temperature measuring sensor; and a steam inner tube, one end of which is connected to the steam generating module, and the other end of which is connected to the steam nozzle, for conveying steam to the steam nozzle; The steam inner tube and the temperature measuring connecting wire are at least partially wound and installed in the outer tube, and a heat insulating space is formed between the steam inner tube and the outer tube.

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