Steam circulation device and beverage machine

Abstract

The utility model discloses a steam circulation device and a beverage machine, the steam circulation device is provided with two air holes and an air transmission channel which is communicated with the two air holes, so that steam enters from one air hole, flows through the air transmission channel and then is discharged outwards through the other air hole; the gas conveying channel comprises a main channel section and a transition channel section connected between the main channel section and the at least one gas hole in a communicating mode, and the radial sectional area of the transition channel section is larger than that of the main channel section. When the transition channel section is arranged between the air inlet hole and the main channel section, a certain volume of steam can be contained, the steam can be conveniently pressurized to enter the main channel section, and a relatively high flow speed is formed; when the transition channel section is arranged between the air outlet hole and the main channel section, the flowing speed, the flowing direction and the like of entering steam can be buffered to a certain degree, the steam can be discharged outwards through the air outlet hole in a relatively stable state, and splashing of milk in an external container is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of beverage machine, concretely relates to a steam flow device and beverage machine. BACKGROUND

[0002] With the continuous improvement of people's living standards, the taste of the beverage is continuously improved, and many people no longer satisfy with single type of beverage, but like to adjust the beverage according to their own preferences. Taking coffee machine as an example, the coffee machine can output coffee or milk. The existing coffee machine is generally externally installed with a steam rod, the steam rod can be connected with steam, and the coffee or milk output by the coffee machine can be heated or frothed to obtain the adjusted beverage. However, the existing steam rod generally directly sprays steam to the outside container, which is easy to splash the milk in the outside container, and causes uneven milk beating, reduces the use quality and use reliability. SUMMARY

[0003] The main purpose of the utility model is to provide a steam flow device and beverage machine, which aims to solve the problem of poor use reliability of the traditional steam rod.

[0004] To achieve the above purpose, the utility model provides a steam flow device, which is provided with two air holes and a gas conveying channel connected with the two air holes, so that steam enters from one air hole, flows through the gas conveying channel and is discharged outward through the other air hole.

[0005] The gas conveying channel includes a main channel section and a transition channel section connected between the main channel section and at least one air hole, and the radial cross-sectional area of the transition channel section is greater than that of the main channel section.

[0006] Optionally, the two air holes are an air inlet hole and an air outlet hole, respectively.

[0007] The transition channel section includes an air inlet transition channel section connected between the air inlet hole and the main channel section.

[0008] Optionally, the steam flow device includes:

[0009] A rod body is provided with a through hole along its axial direction, and the through hole defines the main channel section;

[0010] A base is provided with the air inlet hole, a first mounting hole and a first chamber connected with the air inlet hole and the first mounting hole, a section of the rod body is fixedly installed in the first mounting hole, and the first chamber constitutes the air inlet transition channel section; and

[0011] A first sealing joint is sealingly connected between the rod body and the first mounting hole.

[0012] Optionally, the two gas holes are an air inlet hole and an air outlet hole respectively.

[0013] The transition passage section comprises an air outlet transition passage section which is connected in communication between the air outlet hole and the main passage section.

[0014] Optionally, the steam flow-through device comprises:

[0015] a rod body having a through hole defined axially therethrough, the through hole defining the main passage section;

[0016] a base provided with the air outlet hole and a third mounting hole, and a second chamber connected in communication between the air outlet hole and the third mounting hole, a section of the rod body being fixedly mounted in the third mounting hole, the second chamber constituting the air outlet transition passage section; and

[0017] a second sealing joint member sealingly connected between the rod body and the third mounting hole.

[0018] Optionally, the radial cross-sectional area of the main passage section is the same along the axial direction thereof.

[0019] Optionally, the two gas holes are an air inlet hole and an air outlet hole respectively.

[0020] The steam flow-through device further comprises a temperature detection device, the temperature detection device comprising a main body section penetrating the gas delivery passage, and a detection section and a connecting section extending outwardly from the gas delivery passage respectively, the detection section being disposed adjacent to the air outlet hole, and the connecting section being disposed adjacent to the air inlet hole.

[0021] Optionally, the steam flow-through device comprises:

[0022] a rod body having a through hole defined axially therethrough;

[0023] a base provided with a first chamber, and the air inlet hole, a first mounting hole and a second mounting hole connected in communication with the first chamber, a section of the rod body being fixedly mounted in the first mounting hole, the first chamber constituting one of the transition passage sections; and

[0024] a base provided with a second chamber, and the air outlet hole, a third mounting hole and a fourth mounting hole connected in communication with the second chamber, a section of the rod body being fixedly mounted in the third mounting hole, the second chamber constituting another of the transition passage sections;

[0025] The second mounting hole and the fourth mounting hole are sequentially arranged along the axial direction of the rod body, the temperature detecting device sequentially passes through the first cavity, the through hole and the second cavity via the second mounting hole, and then extends outward via the fourth mounting hole, a section of the temperature detecting device extending outward from the second mounting hole forms the connecting section, and a section of the temperature detecting device extending outward from the fourth mounting hole forms the detecting section, and the outer wall of the main body section is spaced from the hole wall of the through hole to define the main channel section at the spacing.

[0026] Optionally, the gas outlet hole is arranged at intervals around the outer periphery of the detecting section.

[0027] In addition, in order to achieve the above-mentioned purpose, the utility model also provides a kind of beverage machine, comprising:

[0028] Machine body;And,

[0029] Steam flow device, the steam flow device is externally arranged in the machine body, the steam flow device is equipped with two gas holes and the gas conveying channel being connected between two the gas hole, to supply steam from a the gas hole, after flowing through the gas conveying channel, it is exported outward via another the gas hole;

[0030] Wherein, the gas conveying channel includes main channel section and transition channel section being connected between the main channel section and at least one the gas hole, and the radial cross-sectional area of the transition channel section is greater than the radial cross-sectional area of the main channel section.

[0031] In the technical scheme provided by the utility model, one of the two gas holes is an air inlet hole, and the other is an air outlet hole, when the transition channel section is arranged between the air inlet hole and the main channel section, the radial cross-sectional area of the transition channel section is relatively large, which helps to accommodate a certain amount of steam, and facilitates steam pressurization into the main channel section; the radial cross-sectional area of the main channel section is relatively small, so that the steam forms a relatively fast flow rate in the main channel section; when the transition channel section is arranged between the air outlet hole and the main channel section, the radial cross-sectional area of the transition channel section is relatively large, which helps to buffer the flow rate and flow direction of the incoming steam to some extent, so that the steam can be discharged outward via the air outlet hole in a relatively stable state, avoiding the splashing of milk liquid in the external container due to the too fast discharge speed and the disorderly flow direction, which is not conducive to the formation of high-quality milk foam. The utility model helps to improve the use quality and use reliability of the product. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0033] Figure 1 A three-dimensional schematic view of an embodiment of the steam flow device provided by the present application is shown in the figure.

[0034] Figure 2 For Figure 1 An axial cross-sectional view of the steam flow device in the figure.

[0035] Figure 3 For Figure 2 An enlarged structural schematic view of the position A in the figure.

[0036] Figure 4 For Figure 2 An enlarged structural schematic view of the position B in the figure.

[0037] Figure 5 For Figure 1 A three-dimensional schematic view of the base in the first perspective in the figure.

[0038] Figure 6 For Figure 1 A three-dimensional schematic view of the base in the second perspective in the figure.

[0039] Figure 7 For Figure 1 An axial cross-sectional view of the rod body in the figure.

[0040] Figure 8 For Figure 1 A three-dimensional schematic view of the base in the first perspective in the figure.

[0041] Figure 9 For Figure 1 A three-dimensional schematic view of the base in the second perspective in the figure.

[0042] Explanation of the figure reference:

[0043] 100 base; 110 air inlet hole; 120 first mounting hole; 130 second mounting hole; 140 air inlet transition passage section; 200 rod body; 210 through hole; 211 main passage section; 300 first sealing joint piece; 400 base; 410 air outlet hole; 420 third mounting hole; 430 fourth mounting hole; 440 air outlet transition passage section; 500 second sealing joint piece; 600 temperature detection device; 610 main body section; 620 detection section; 630 connection section; 700 heat insulation sleeve body.

[0044] The purposes, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0046] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0047] In addition, if the embodiments of the utility model involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes A scheme, or B scheme, or A and B simultaneously meet the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0048] The utility model provides a kind of steam flow device and the beverage machine applied by it. Among them, the specific performance form of beverage machine is not limited, can be the product of ready-made beverage is modulated;It can also be the product of ready-made beverage is modulated after powder and / or liquid material are prepared to obtain beverage. Among them, the modulation mode that can be realized based on steam flow device can be but not limited to using steam to heat beverage, using steam and air to foam beverage, etc.

[0049] The beverage machine further comprises a machine body in addition to the steam flow device, and the machine body generally has a front side surface facing the user and a rear side surface. Taking the beverage machine as an example of a coffee machine, the machine body further has a tray protruding forward at the front side surface, and the tray comprises a bottom disc concavely formed with a water collecting groove and a grid bracket covering the groove opening of the water collecting groove. The grid bracket is used for placing an external container and filtering large-sized residue through the grid. The machine body generally further has a downward beverage outlet arranged above the tray at the front side surface of the machine body, and the beverage outlet is used for providing a beverage such as milk liquid or coffee to the external container placed on the tray.

[0050] Therefore, the steam flow device is generally arranged outside the machine body and arranged at the front side surface of the machine body as much as possible. The steam flow device is generally arranged at least adjacent to the tray, so that the steam flow device can supply steam to the external container placed on the tray.

[0051] In addition, the steam flow device is generally used only for flowing steam, and a steam source is arranged in the beverage machine or is independent of other products of the beverage machine as the steam source. The steam source can generate steam and supply the steam into the steam flow device.

[0052] Specifically, referring to Figures 1 to 9 The steam flow device provided by the utility model is provided with two air holes and a gas conveying channel connected with the two air holes, so that steam enters from one air hole, flows through the gas conveying channel, and is discharged from the other air hole. The gas conveying channel comprises a main channel section 211 and a transition channel section connected between the main channel section 211 and at least one air hole, and the radial cross-sectional area of the transition channel section is greater than that of the main channel section 211.

[0053] In the technical scheme provided by the utility model, one of the two air holes is an air inlet hole 110, and the other is an air outlet hole 410. When the transition channel section is arranged between the air inlet hole 110 and the main channel section 211, the radial cross-sectional area of the transition channel section is relatively large, which is helpful for accommodating a certain amount of steam and facilitating the pressurization of the steam into the main channel section 211. The radial cross-sectional area of the main channel section 211 is relatively small, so that the steam forms a relatively fast flow rate in the main channel section 211. When the transition channel section is arranged between the air outlet hole 410 and the main channel section 211, the radial cross-sectional area of the transition channel section is relatively large, which is helpful for buffering the flow rate and flow direction of the entering steam to some extent, so that the steam can be discharged from the air outlet hole 410 in a relatively stable state, avoiding the splashing of milk liquid in the external container due to the too fast discharge speed and the disorderly flow direction, which is not conducive to the generation of high-quality milk foam. The utility model is helpful for improving the use quality and use reliability of the product.

[0054] It can be understood that when the two air holes are the air inlet hole 110 and the air outlet hole 410 respectively, the transition passage section can be arranged between the air inlet hole 110 and the main passage section 211, and / or arranged between the air outlet hole 410 and the main passage section 211. For the convenience of understanding, in the following embodiments, the transition passage section arranged between the air inlet hole 110 and the main passage section 211 is defined as the air inlet transition passage section 140, and the transition passage section arranged between the air outlet hole 410 and the main passage section 211 is defined as the air outlet transition passage section 440.

[0055] As known from the above, the main passage section 211 is mainly used to flow steam, and forms a sufficient flow rate. At this time, the radial cross-sectional area of the main passage section 211 can be arranged uniformly along its axial direction. That is, the main passage section 211 is arranged in a substantially cylindrical shape, and the flow rate and flow of steam at each position in the main passage section 211 are basically the same. Of course, in other embodiments, according to actual needs, the radial cross-sectional area of the main passage section 211 can also be arranged to be at least partially different along its axial direction, that is, the main passage section 211 is formed with a passage section with a smaller radial cross-sectional area, and also formed with a passage section with a larger radial cross-sectional area.

[0056] The radial cross-sectional area of the air inlet transition passage section 140 is arranged to be larger than that of the main passage section 211. Specifically, at least at the connection between the air inlet transition passage section 140 and the main passage section 211, the radial cross-sectional area of the air inlet transition passage section 140 is larger, so that more steam can be collected, and when entering the main passage section 211 with a smaller radial cross-sectional area, it is equivalent to pressurization to achieve speed-up.

[0057] Similarly, the radial cross-sectional area of the air outlet transition passage section 440 is arranged to be larger than that of the main passage section 211. Specifically, at least at the connection between the air outlet transition passage section 440 and the main passage section 211, the radial cross-sectional area of the air outlet transition passage section 440 is larger, so that when the steam flows into the air outlet transition passage section 440 through the main passage section 211, the flow rate is slowed down due to the increase of the accommodation space, thereby avoiding the milk splashing caused by the steam being discharged outward through the air outlet at a large flow rate.

[0058] It should be noted that the radial cross-sectional area described above can be the radial direction of the steam passage, that is, the direction perpendicular to the flow direction of the steam when the steam flows through the steam passage. Since the shape of the steam passage is not limited, the flow direction of the steam corresponding to each passage section of the steam passage can be different, and the corresponding radial cross-sectional area also shows different directions.

[0059] In the present design, the steam flow device can be composed of a single structure, for example, composed of a pipe body. Alternatively, the steam flow device can be composed of at least two single structures.

[0060] Specifically, when the steam flow device consists of at least two individual structures, each individual structure can be arranged sequentially along the radial direction of the gas delivery channel, so that the individual structures together enclose the gas delivery channel after assembly. Alternatively, each individual structure can be arranged sequentially along the axial direction of the gas delivery channel, so that each individual structure independently constitutes a different channel segment of the gas delivery channel.

[0061] Specifically, for example Figures 1 to 9 Take the structure shown below as an example:

[0062] The steam flow device may include a rod 200. The rod 200 is generally cylindrical and has a through hole 210 extending along its axial direction. The through hole 210 may be a straight hole extending along the axial direction of the rod 200, or a curved hole structure with at least one bend. A main channel section 211 is defined within the through hole 210. Therefore, in order to make the steam flow in the main channel section 211 faster and more stable, and also to make the rod 200 easier to process and shape, in this embodiment, the through hole 210 is preferably a straight hole structure. The through hole 210 has a first opening and a second opening that are arranged opposite to each other in its axial direction, wherein the first opening is located near the air inlet 110 and the second opening is located near the air outlet 410.

[0063] The through-hole 210 directly or indirectly defines the main channel section 211. Furthermore, the radial cross-sectional area of ​​the main channel section 211 is set in the same way along its axial direction, so that the flow velocity and flow rate of the steam flowing in each section of the main channel section 211 are relatively balanced and consistent, making it more stable and less prone to disturbance.

[0064] Next, the steam flow device may include a base 100. The base 100 facilitates the overall installation and fixation of the steam flow device to the machine body. The base 100 is generally block-shaped. An air inlet 110 is formed on the base 100. Furthermore, the base 100 also has a first mounting hole 120 spaced apart from the air inlet 110. The first mounting hole 120 and the air inlet 110 are connected via a first chamber. A rod segment with a first orifice on the rod body 200 is detachably installed at the first mounting hole 120, such that the first orifice communicates with the first chamber. In this case, the air inlet 110 and the first orifice are connected via the first chamber, which constitutes the aforementioned air intake transition channel segment 140. It is understandable that, since the base 100 is block-shaped, compared with the rod-shaped rod 200, it has enough space in the radial direction for the first chamber, namely the air intake transition channel section 140, to be formed, ensuring that the radial cross-sectional area of ​​the air intake transition channel section 140 is greater than the radial cross-sectional area of ​​the main channel section 211.

[0065] In addition, the rod body 200 is insertedly connected to the first mounting hole 120. Therefore, in an embodiment, the insertion depth of the rod body 200 relative to the first mounting hole 120 can be adjusted. Specifically, for example, the rod body 200 is provided with external threads, and the first mounting hole 120 is provided with internal threads. By adjusting the threaded depth of the two, the above-mentioned purpose of adjusting the insertion depth of the rod body 200 relative to the first mounting hole 120 can be achieved. When the insertion depth of the rod body 200 relative to the first mounting hole 120 is adjustable, the space occupied by the rod segment inserted into the first mounting hole 120 relative to the first chamber can be adjusted, thereby adjusting the space in the first chamber that constitutes the air intake transition passage segment 140, so that the air capacity of the air intake transition passage segment 140 can be adjusted.

[0066] The installation positions of the air inlet hole 110 and the first mounting hole 120 on the base 100 are not limited, for example, the two can be arranged along the axial direction of the rod body 200, or the air inlet hole 110 can be arranged at a position corresponding to the side wall of the rod body 200.

[0067] The rod segment of the rod body 200 provided with the first opening and the first mounting hole 120 can be directly inserted; or the steam flow device further comprises a first sealing joint 300, which is sealingly connected between the rod body 200 and the first mounting hole 120, to achieve sealing connection between the first opening and the first chamber.

[0068] The steam flow device can comprise a base 400. When the base 100 is mounted to the machine body, the rod body 200 and the base 400 are generally suspended relative to the machine body, so the base 400 can be as small as possible in volume or as light as possible in mass. In the structure as shown in Figures 1 to 9 In the structure as shown in the drawings, the base 400 is generally in the form of a shell, which is provided with an air outlet hole 410 and a third mounting hole 420. The third mounting hole 420 and the air outlet hole 410 are connected in communication through a second chamber. The rod segment of the rod body 200 provided with the second opening is detachably mounted at the third mounting hole 420, so that the second opening is in communication with the second chamber. At this time, the air outlet hole 410 and the second opening are in communication through the second chamber, and the second chamber constitutes the above-mentioned air outlet transition passage segment 440. It can be understood that, since the base 400 is provided in the form of a shell, compared with the rod-shaped arrangement of the rod body 200, it can also reserve sufficient space in the radial direction for the second chamber, i.e., the air outlet transition passage segment 440, to be formed, ensuring that the radial cross-sectional area of the air outlet transition passage segment 440 is greater than that of the main passage segment 211.

[0069] The rod segment with the second opening and the third mounting hole 420 can be directly inserted, or the steam flow device further comprises a second sealing joint 500, which is sealingly connected between the rod 200 and the third mounting hole 420, thereby achieving sealing connection between the second opening and the second chamber.

[0070] In addition, based on one or more of the above embodiments, in a further aspect, the steam flow device further comprises a temperature detection device 600, which comprises a main body segment 610 penetrating the gas conveying channel, and a detection segment 620 and a connecting segment 630 respectively extending outward from the gas conveying channel, the detection segment 620 being arranged adjacent to the gas outlet hole 410, and the connecting segment 630 being arranged adjacent to the gas inlet hole 110.

[0071] It can be understood that in actual application, the base 400 and part of the rod segment of the rod 200 (hereinafter collectively referred to as the insertion part for ease of understanding) extend into the external container to discharge steam into the milk liquid in the external container. When the above-mentioned insertion part extends into the external container, the temperature detection device 600 can detect the temperature of the milk liquid in the external container through the detection segment 620 after being started, thereby enabling intelligent and automatic monitoring of the warming process of the milk liquid and the frothing process of the milk liquid. By penetrating the main body segment 610 in the gas conveying channel, the main body segment 610 can be arranged without occupying additional external space of the rod 200, so that the overall radial dimension of the steam flow device is smaller and the structure is more compact.

[0072] The temperature detection device 600 generally further comprises a connecting segment 630 arranged at one end of the main body segment 610 away from the detection segment 620 and also extending outward from the gas conveying channel. The connecting segment 630 is generally arranged away from the gas outlet hole 410. The connecting segment 630 is used to electrically connect with an external electronic control device.

[0073] Specifically, when the steam flow device at least comprises the rod 200, the base 100 and the base 400 as described above, the base 100 further comprises a second mounting hole 130 arranged at a position spaced from the gas inlet hole 110 and the first mounting hole 120. The second mounting hole 130 is in communication with the first chamber. The base 400 further comprises a fourth mounting hole 430 arranged at a position spaced from the gas outlet hole 410 and the third mounting hole 420, and the fourth mounting hole 430 is in communication with the second chamber. Specifically, the first mounting hole 120, the second mounting hole 130, the third mounting hole 420 and the fourth mounting hole 430 are arranged in sequence along the central axis direction of the rod 200. The main body segment 610 penetrates the first chamber, the through hole 210 and the second chamber in sequence, the connecting segment 630 extends outward from the second mounting hole 130, and the detection segment 620 extends outward from the fourth mounting hole 430.

[0074] When the body segment 610 is arranged in the through hole 210, the outer peripheral side wall of the body segment 610 and the inner peripheral side wall of the rod body 200 are at least partially spaced apart, forming the above-mentioned main channel segment 211. Generally, the rod body 200, the through hole 210 defined therein, and the body segment 610 can all be designed in a substantially cylindrical shape. When the body segment 610 is arranged in the through hole 210 of the rod body 200 as a whole, the body segment 610 can be arranged eccentrically, that is, the central axis of the rod body 200 and the central axis of the body segment 610 are substantially parallel but not collinear. At this time, if the outer peripheral side wall of the body segment 610 and the inner peripheral side wall of the rod body 200 are partially in contact and partially spaced apart, the main channel segment 211 formed therebetween is generally a circumferentially discontinuous chamber. If the outer peripheral side wall of the body segment 610 and the inner peripheral side wall of the rod body 200 are not in contact at all, the main channel segment 211 formed therebetween is generally a circumferentially continuous, eccentric annular chamber.

[0075] In the present embodiment, however, the rod body 200 and the body segment 610 are coaxially arranged. That is, when the rod body 200 has a first central axis and the temperature detection device 600 has a second central axis, the first central axis of the rod body 200 and the second central axis of the body segment 610 are substantially collinear. Or when complete collinearity cannot be achieved, the first central axis and the second central axis are made as close as possible and close to parallel. At this time, the outer peripheral side wall of the body segment 610 and the inner peripheral side wall of the rod body 200 are not in contact at all, and the gap formed therebetween is a circumferentially continuous, concentric annular chamber, so that the flow speed, flow volume, etc. of the gas passage between the body segment 610 and the rod body 200 in each direction remain consistent, which helps to further improve the stability of the steam flow.

[0076] In view of the above, in a further aspect, at least two of the gas outlet holes 410 are arranged spaced apart around the outer periphery of the detection segment 620. When each of the gas outlet holes 410 is arranged around the outer periphery of the detection segment 620, the steam discharged outwardly from the gas outlet holes 410 will flow around the outer periphery of the detection segment 620 and drive the milk to move without directly impacting the detection segment 620, which helps to improve the accuracy of the temperature detection of the milk by the detection segment 620.

[0077] In addition, based on one or more of the above embodiments, the steam flow device can further include a heat insulation sleeve 700 arranged around the outer periphery of the rod body 200. The thermal conductivity of the heat insulation sleeve 700 is set to be lower than that of the rod body 200. For example, when the rod body 200 is made of metal material as a whole, the heat insulation sleeve 700 can be made of, for example, rubber or other materials, so as to avoid excessive outward dispersion of the heat of the steam flowing in the rod body 200, which is not conducive to the preparation of the beverage and may also cause burns to the user. Of course, the heat insulation sleeve 700 can also be provided with a structure convenient for the user to hold, such as an anti-slip structure or a groove easy to grip and ergonomic.

[0078] The above merely describes preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A steam circulation device, characterized in that, The steam flow device is provided with two air holes and a gas delivery channel connecting the two air holes, so that steam enters from one of the air holes, flows through the gas delivery channel, and is discharged out through the other air hole. The gas delivery channel includes a main channel section and a transition channel section connecting the main channel section and at least one of the gas holes, wherein the radial cross-sectional area of ​​the transition channel section is larger than the radial cross-sectional area of ​​the main channel section.

2. The steam circulation device as described in claim 1, characterized in that, The two vents are respectively an air inlet and an air outlet; The transition channel section includes an intake transition channel section that connects the intake port and the main channel section.

3. The steam circulation device as described in claim 2, characterized in that, The steam flow device includes: The rod body has a through hole extending along its axial direction, and the through hole defines the main channel section. The base includes the air inlet and a first mounting hole, and a first chamber connecting the air inlet and the first mounting hole. A section of the rod is fixedly installed in the first mounting hole, and the first chamber constitutes the air intake transition channel section. The first sealing connector is sealed between the rod body and the first mounting hole.

4. The steam circulation device as described in claim 1, characterized in that, The two vents are respectively an air inlet and an air outlet; The transition channel section includes an exhaust transition channel section that connects the exhaust port and the main channel section.

5. The steam circulation device as described in claim 4, characterized in that, The steam flow device includes: The rod body has a through hole extending along its axial direction, and the through hole defines the main channel section. The base includes the air outlet and a third mounting hole, as well as a second chamber connecting the air outlet and the third mounting hole. A section of the rod is fixedly installed in the third mounting hole, and the second chamber constitutes the air outlet transition channel section. The second sealing connector is sealed between the rod body and the third mounting hole.

6. The steam circulation device as described in claim 1, characterized in that, The radial cross-sectional area of ​​the main channel section is set in the same manner along its axial direction.

7. The steam circulation device as described in claim 1, characterized in that, The two vents are respectively an air inlet and an air outlet; The steam circulation device further includes a temperature detection device, which includes a main body section passing through the gas transmission channel, and a detection section and a connecting section extending outward from the gas transmission channel, respectively. The detection section is located near the gas outlet, and the connecting section is located near the gas inlet.

8. The steam circulation device as described in claim 7, characterized in that, The steam flow device includes: The rod body has a through hole extending along its axial direction; The base includes a first chamber and an air inlet, a first mounting hole, and a second mounting hole communicating with the first chamber. A section of the rod is fixedly installed in the first mounting hole, and the first chamber forms a transition channel section. The base has a second chamber and an air outlet, a third mounting hole and a fourth mounting hole that connect the second chamber. One section of the rod is fixedly installed in the third mounting hole. The second chamber forms another transition channel section. The second mounting hole and the fourth mounting hole are arranged sequentially along the axial direction of the rod. The temperature detection device passes through the second mounting hole sequentially into the first chamber, the through hole, and the second chamber, and then extends outward through the fourth mounting hole. The section of the temperature detection device extending out of the second mounting hole constitutes the connecting section, and the section extending out of the fourth mounting hole constitutes the detection section. The outer wall of the main body section is spaced apart from the wall of the through hole to define the main channel section at the interval.

9. The steam circulation device as described in claim 7, characterized in that, At least two air vents are arranged at intervals around the outer periphery of the detection section.

10. A beverage machine, characterized in that, include: The body; and, The steam circulation device as described in any one of claims 1 to 9, wherein the steam circulation device is externally disposed within the body.

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