Emulsification apparatus and conversion device

Abstract

The application discloses an emulsification device and a conversion device, and relates to the technical field of emulsification devices. The emulsification device comprises a hollow main body provided with a Venturi structure; the Venturi structure comprises a steam channel and a negative pressure cavity, the steam channel is used for connecting a steam source, the hollow main body is provided with a fluid inlet and a fluid outlet which are respectively connected to the negative pressure cavity; the emulsification device further comprises a conversion device which is detachably connected to the hollow main body, the conversion device comprises a first liquid inlet pipe and a second liquid inlet pipe, and the conversion device has multiple connection modes relative to the hollow main body; in different connection modes, the first liquid inlet pipe and the second liquid inlet pipe are selectively connected to the fluid inlet so as to output target fluids with different temperatures or different properties from the fluid outlet. The emulsification device can realize multiple output modes of target fluids on the basis of a single Venturi structure in combination with the design of the conversion device.

Description

Technical Field

[0001] This invention relates to the field of beverage preparation technology, and more particularly to an emulsification device and a conversion apparatus. Background Technology

[0002] With the popularization of coffee culture and the upgrading of consumption, fully automatic coffee machines are widely used in coffee shops, homes, and offices, providing the ability to make coffee, milk, and milk foam beverages. In traditional coffee machines, to obtain finer and more stable milk foam during the preparation of hot drinks such as coffee, a Venturi structure or a similar negative pressure suction principle is often used. However, users' demands for temperature and taste are becoming increasingly diverse. They want high-temperature milk foam, but may also need low-temperature milk foam or only hot milk (without foam). This demand places higher demands on the versatility of traditional single-system products. If cost, ease of use, and cleaning and maintenance difficulties cannot be balanced, it will be difficult to achieve a multifunctional and high-quality beverage-making experience.

[0003] In related technologies, there are two main solutions for adjusting milk foam temperature or preparing milk foam and hot milk: First, using manual knobs or mechanical mechanisms to control air and milk flow to adjust the amount or temperature of foam; second, using two independent milk foaming systems to prepare milk foam at different temperatures or to prepare milk foam and hot milk separately. The former requires frequent and precise adjustments of key parameters by the user, resulting in high learning costs and potential fluctuations in milk foam quality; while the latter, although meeting different needs through automated division of labor, has a complex overall structure, many parts, and increased costs and maintenance difficulty. Summary of the Invention

[0004] One object of the present invention is to provide an emulsification device with a simple structure and capable of realizing multiple output modes.

[0005] Another objective of this invention is to provide a simple conversion device that can be used with a venturi structure to achieve multiple output modes.

[0006] One aspect of the present invention provides an emulsification device, including a hollow body having a Venturi structure; the Venturi structure includes a steam channel and a negative pressure chamber, the steam channel being connected to a steam source, and the hollow body having a fluid inlet and a fluid outlet respectively connected to the negative pressure chamber; the emulsification device further includes a conversion device detachably connected to the hollow body, the conversion device including a first inlet pipe and a second inlet pipe, the conversion device having multiple connection modes relative to the hollow body; in different connection modes, the first inlet pipe and the second inlet pipe are selectively connected to the fluid inlet to output target fluids with different temperatures or properties from the fluid outlet.

[0007] Another aspect of the present invention provides an emulsification device, including a hollow body having a venturi structure; the venturi structure includes a steam channel and a negative pressure chamber, the steam channel being connected to a steam source, and a first fluid inlet and a second fluid inlet being spaced apart on the wall of the negative pressure chamber; the hollow body having a fluid outlet communicating with the negative pressure chamber; fluid selectively enters the negative pressure chamber from the first fluid inlet or from the second fluid inlet, so that the fluid outlet outputs different target fluids; the emulsification device further includes a conversion device connected to the hollow body, the conversion device being operable to control the fluid to enter the negative pressure chamber from the first fluid inlet or from the second fluid inlet.

[0008] Another aspect of the present invention provides a conversion device that cooperates with a hollow body having a venturi structure for conveying liquid into a negative pressure chamber of the hollow body. The conversion device includes a first inlet pipe, a second inlet pipe, and a sealing pipe arranged side by side. The first inlet pipe and the second inlet pipe are respectively disposed on both sides of the sealing pipe. A first fluid inlet and a second fluid inlet are spaced apart on the wall of the negative pressure chamber. The connection between the conversion device and the hollow body satisfies at least one of the following characteristics: the first inlet pipe is idle, the second inlet pipe is connected to one of the first fluid inlet and the second fluid inlet, and the sealing pipe restricts fluid input from the other of the first fluid inlet and the second fluid inlet to the negative pressure chamber; or the second inlet pipe is idle, the first inlet pipe is connected to one of the first fluid inlet and the second fluid inlet, and the sealing pipe restricts fluid input from the other of the first fluid inlet and the second fluid inlet to the negative pressure chamber.

[0009] Compared with existing technologies, the advantages of this invention are as follows: Based on a single Venturi structure, this emulsification device, combined with a conversion device design, can achieve various output modes for target fluids, such as high temperature, low temperature, or whether or not foam is present, thereby meeting users' needs for different tastes, temperatures, or foam states. Furthermore, the emulsification device has a relatively compact structure and fewer parts, significantly reducing equipment costs and cleaning / maintenance difficulties, while also improving user convenience and the stability of beverage quality. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of an emulsification device according to an embodiment of the present invention, wherein the conversion device and the hollow body are in a first connection mode.

[0011] Figure 2 yes Figure 1 A cross-sectional view of the emulsification equipment along line AA.

[0012] Figure 3 yes Figure 2 A cross-sectional view of the emulsification equipment along the BB line.

[0013] Figure 4 yes Figure 1 An exploded three-dimensional diagram of the emulsification equipment.

[0014] Figure 5 This is a schematic diagram of an emulsification device according to another embodiment of the present invention.

[0015] Figure 6 yes Figure 5 A cross-sectional view of the emulsification equipment along the CC line.

[0016] Figure 7 yes Figure 6 A cross-sectional view of the emulsification equipment along the DD line.

[0017] Figure 8 yes Figure 1 A schematic diagram of the conversion device and hollow body of the emulsification equipment in the second connection mode.

[0018] Figure 9 yes Figure 8 A cross-sectional view of the emulsification equipment along line EE.

[0019] Figure 10 yes Figure 9 A cross-sectional view of the emulsification equipment along line FF.

[0020] Figure 11 yes Figure 1 A schematic diagram of the conversion device and hollow body of the emulsification equipment in the third connection mode.

[0021] Figure 12 yes Figure 11 A cross-sectional view of the emulsification equipment along line GG.

[0022] Figure 13 yes Figure 12 A cross-sectional view of the emulsification equipment along line HH.

[0023] Figure 14 yes Figure 1 A schematic diagram of the conversion device and hollow body of the emulsification equipment in the fourth connection mode.

[0024] Figure 15 yes Figure 14 A cross-sectional view of the emulsification equipment along line II.

[0025] Figure 16 yes Figure 15 A cross-sectional view of the emulsification equipment along line JJ.

[0026] Figure 17 This is a schematic diagram of an emulsification device according to another embodiment of the present invention.

[0027] Figure 18 yes Figure 17 An exploded three-dimensional diagram of the emulsification equipment.

[0028] The repeated use of reference numerals in this specification and the accompanying drawings is intended to indicate the same or similar features or elements of this application. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0030] It should be understood that terms such as “above,” “over,” “below,” and “under” used herein to indicate spatial relative position are for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms for spatial relative position may be intended to include different orientations of the equipment in use or operation other than those shown in the figures. The terms “first,” “second,” and “third” used herein are interchangeable to distinguish one component from another, and these terms are not intended to indicate the location or importance of individual components.

[0031] The emulsification device 100 in this specific embodiment of the invention will be described using an emulsification device 100 for a coffee machine as an example. (Refer to...) Figures 1 to 4 As shown, in this embodiment, the emulsification device 100 includes a hollow body 20, which has a Venturi structure. The Venturi structure includes a steam channel 201 and a negative pressure chamber 202. The steam channel 201 connects to a steam source. A first fluid inlet 211 and a second fluid inlet 212 are spaced apart on the wall of the negative pressure chamber 202. The hollow body 20 has a fluid outlet 203 connecting to the negative pressure chamber 202. Fluid can selectively enter the negative pressure chamber 202 from either the first fluid inlet 211 or the second fluid inlet 212, so that the fluid outlet 203 outputs different target fluids. The high-speed steam flowing out through the steam channel 201 creates a negative pressure in the negative pressure chamber 202, driving the fluid to enter the negative pressure chamber 202 from either the first fluid inlet 211 or the second fluid inlet 212.

[0032] The negative pressure chamber 202 has a first fluid inlet 211 and a second fluid inlet 212 spaced apart on its wall. Fluid is introduced into the negative pressure chamber 202 through either the first fluid inlet 211 or the second fluid inlet 212. The fluid introduced into the negative pressure chamber 202 can be liquid milk or a mixture of liquid milk and air. Correspondingly, the target fluid can be hot milk or hot milk foam. When liquid milk is introduced through the first fluid inlet 211 or the second fluid inlet 212, the target fluid output from the fluid outlet 203 is hot milk; when a mixed fluid is introduced through the first fluid inlet 211 or the second fluid inlet 212, the target fluid output from the fluid outlet 203 is hot milk foam.

[0033] The emulsifying device 100 also includes a conversion device 30 connected to the hollow body 20. The conversion device 30 can operably control the fluid to enter the negative pressure chamber 202 from either the first fluid inlet 211 or the second fluid inlet 212. The configuration of the emulsifying device 100 facilitates the introduction of fluid into the negative pressure chamber 202 from different fluid inlets.

[0034] This emulsifying device 100, based on a single Venturi structure, incorporates multiple fluid inlets and conversion devices 30. Through selective connection of different fluid inlets, it can achieve various output modes for target fluids, such as high temperature, low temperature, or whether or not foam is present, thereby meeting users' needs for different tastes, temperatures, or foam states. The emulsifying device 100, capable of outputting different target fluids, requires only a single Venturi structure, has fewer parts, a simpler structure, and is easier to clean, thus significantly reducing equipment costs and cleaning and maintenance difficulty. It eliminates the need for complex parameter settings, improving user convenience and the stability of beverage quality.

[0035] The hollow body 20 is also connected to an outlet pipe 26 and an outlet screen 27. The outlet pipe 26 is connected to the fluid outlet 203 by an interference fit, and the outlet screen 27 is connected to the outlet pipe 26. The outlet screen 27 is provided with multiple small holes to improve the quality of the output milk foam.

[0036] In one embodiment, the steam passage 201 has a steam outlet 205 that defines a central axis X, and a first fluid inlet 211 and a second fluid inlet 212 are spaced apart along the extension direction of the central axis X.

[0037] The central axis X is the flow direction axis of steam after it exits steam outlet 205. Along the extension direction of the central axis X, the distance from the first fluid inlet 211 to steam outlet 205 is different from the distance from the second fluid inlet 212 to steam outlet 205. A greater negative pressure is formed in the area closer to steam outlet 205. With the same amount of steam, the first fluid inlet 211, closer to steam outlet 205, will draw in more fluid per unit time, resulting in a relatively lower temperature for the final output target fluid. The axial spacing of the first fluid inlet 211 and the second fluid inlet 212 optimizes the negative pressure distribution gradient, making the flow rate difference more significant.

[0038] Reference Figure 2 Along the extension direction of the central axis X, i.e., along the steam flow direction, the first fluid inlet 211 is relatively closer to the steam outlet 205, while the second fluid inlet 212 is relatively farther from the steam outlet 205. Here, "closer" and "farther" are relative to the steam outlet 205, with L1 being less than L2. L1 is the distance from the first fluid inlet 211 to the steam outlet 205, and L2 is the distance from the second fluid inlet 212 to the steam outlet 205. The spacing between the two fluid inlets along the central axis X is designed based on the steam velocity gradient. The first fluid inlet 211, being closer to the high-speed steam flow region, creates a greater negative pressure, meaning the pressure difference between the first fluid inlet 211 and the outside is greater. Conversely, the pressure difference between the second fluid inlet 212 and the outside is relatively smaller. Therefore, the fluid flow rate through the first fluid inlet 211 per unit time is significantly higher than the fluid flow rate through the second fluid inlet 212.

[0039] When a higher temperature target fluid needs to be output, the switching device 30 switches the blocking position, activating the second fluid inlet 212 and blocking the first fluid inlet 211. Because the steam velocity and negative pressure at the second fluid inlet 212 decrease, the pressure difference between the second fluid inlet 212 and the outside is relatively small, resulting in a reduced fluid flow rate per unit time. Therefore, with the same amount of steam, a higher temperature target fluid is output. Conversely, when a lower temperature target fluid needs to be output, the switching device 30 switches the blocking position, activating the first fluid inlet 211 and blocking the second fluid inlet 212. Because the steam velocity and negative pressure at the first fluid inlet 211 are higher, the pressure difference between the first fluid inlet 211 and the outside is greater, resulting in a higher fluid flow rate per unit time. Therefore, with the same amount of steam, a lower temperature target fluid is output.

[0040] In one embodiment, the first fluid inlet 211 and the second fluid inlet 212 can be configured such that the radial distances from the first fluid inlet 211 and the second fluid inlet 212 to the central axis X are the same, and the inlet cross-sectional areas of the first fluid inlet 211 and the second fluid inlet 212 are the same. That is, the aperture sizes of the first fluid inlet 211 and the second fluid inlet 212 are the same, and their radial distances relative to the central axis X are also the same. Here, the radial distance refers to the perpendicular distance from the fluid inlet to the central axis X, and the inlet cross-sectional area is the cross-sectional area of ​​the fluid inlet.

[0041] This allows the flow rate of the fluid entering the negative pressure chamber 202 to be controlled based on the position of the first fluid inlet 211 and the second fluid inlet 212 from the steam outlet 205. That is, the flow rate of the fluid entering the negative pressure chamber 202 can be controlled based on the magnitudes of L1 and L2, respectively, and the temperature of the output target fluid can be determined, resulting in more precise temperature control of the target fluid.

[0042] like Figure 2 As shown, the first fluid inlet 211 and the second fluid inlet 212 are at the same radial distance from the central axis X and have the same inlet cross-sectional area, but are spaced apart along the extension direction of the central axis X. Flow control is achieved by utilizing the steam velocity gradient through the positional difference of the fluid inlets along the extension direction of the central axis X, that is, by utilizing the steam velocity decay characteristics to adjust the flow rate.

[0043] In one embodiment, the first fluid inlet 211 and the second fluid inlet 212 can be configured such that the radial distances from the first fluid inlet 211 and the second fluid inlet 212 to the central axis X are different, and the inlet cross-sectional areas of the first fluid inlet 211 and the second fluid inlet 212 are different. That is, the orifice sizes of the first fluid inlet 211 and the second fluid inlet 212 are different, and their radial distances relative to the central axis X are also different. By adjusting the flow rate both through orifice size differences and radial position differences, the layout of the first fluid inlet 211 and the second fluid inlet 212 can increase or decrease the negative pressure distribution gradient, resulting in a larger or smaller flow rate difference between the first fluid inlet 211 and the second fluid inlet 212.

[0044] In one embodiment, the first fluid inlet 211 and the second fluid inlet 212 are equidistant from the central axis X, but their inlet cross-sectional areas are different. The flow rate can be further expanded by adjusting the orifice diameter in addition to the axial positional difference. For example, if the inlet cross-sectional area of ​​the first fluid inlet 211 is larger than that of the second fluid inlet 212, more fluid flows through the first fluid inlet 211, resulting in a lower temperature of the output target fluid.

[0045] In one embodiment, the first fluid inlet 211 and the second fluid inlet 212 are at different radial distances from the central axis X, while the inlet cross-sectional areas of the first fluid inlet 211 and the second fluid inlet 212 are the same. The flow rate can be further expanded by adjusting the radial position difference in addition to the axial position difference.

[0046] The above-mentioned combination designs can be adapted to the spatial layout requirements of different emulsification equipment 100. For example, a scheme with the same radial distance can be used for narrow negative pressure chambers 202, while a scheme with different radial distances can be used for complex scenarios, thereby enhancing the versatility of the system.

[0047] Reference Figures 5 to 7 In one embodiment, the steam passage 201 has a steam outlet 205, which defines a central axis X. A first fluid inlet 211 and a second fluid inlet 212 are circumferentially spaced along the central axis X. The central axis X is the axis of the flow direction of steam after it exits the steam outlet 205. The first fluid inlet 211 and the second fluid inlet 212 are circumferentially spaced along the central axis X; that is, around the central axis X, the first fluid inlet 211 and the second fluid inlet 212 have different angles relative to the same starting point. The first fluid inlet 211 and the second fluid inlet 212 are circumferentially distributed with the central axis X as a reference. The centerlines of the first fluid inlet 211 and the second fluid inlet 212 can be on the same plane (e.g., a plane perpendicular to the central axis X), that is, along the extension direction of the central axis X, the first fluid inlet 211 and the second fluid inlet 212 are equidistant from the steam outlet 205.

[0048] The first fluid inlet 211 and the second fluid inlet 212 are circumferentially aligned along the central axis X. While achieving flow rate differences, this eliminates the need to increase the length of the negative pressure chamber 202 along the central axis X, allowing for a more compact overall emulsification device 100. Furthermore, the circumferentially spaced arrangement of the first fluid inlet 211 and the second fluid inlet 212 enables a centrally symmetrical distribution of the fluid inlets, reducing manufacturing tolerance sensitivity and avoiding flow field instability caused by axial position differences. When switching fluid inlets via the switching device 30, the symmetrical arrangement of the first fluid inlet 211 and the second fluid inlet 212 ensures flow field uniformity after fluid path switching, improving temperature regulation accuracy.

[0049] In one embodiment, the first fluid inlet 211 and the second fluid inlet 212 are at the same radial distance from the central axis X, and the inlet cross-sectional areas of the first fluid inlet 211 and the second fluid inlet 212 are different.

[0050] Reference Figure 5 and Figure 6The first fluid inlet 211 and the second fluid inlet 212 have different inlet cross-sectional areas, meaning their orifice diameters are different. The orifice diameter of the first fluid inlet 211 is larger than that of the second fluid inlet 212, but the radial distances from both inlets to the central axis X are the same. This difference in orifice diameter directly controls the fluid flow rate: the larger orifice diameter of the first fluid inlet 211 allows for a higher flow rate; when the conversion device 30 opens the first fluid inlet 211, the fluid flow rate per unit time is higher, allowing for the output of a lower-temperature target fluid with the same amount of steam. Conversely, the smaller orifice diameter of the second fluid inlet 212 results in a lower flow rate; when the conversion device 30 opens the second fluid inlet 212, the fluid flow rate per unit time is even lower, allowing for the output of a higher-temperature target fluid with the same amount of steam. By directly controlling the flow rate through the inlet cross-sectional area, the temperature of the output target fluid is more accurate.

[0051] When the fluid inlet is switched by the switching device 30, when the switching device 30 blocks the second fluid inlet 212, the fluid enters the negative pressure chamber 202 only through the first fluid inlet 211. Because the opening diameter of the first fluid inlet 211 is larger, the flow rate per unit time increases. Under the same steam volume, the fluid outlet 203 outputs the low-temperature target fluid; refer to Figure 5 Conversely, when the conversion device 30 blocks the first fluid inlet 211, the fluid enters through the second fluid inlet 212. Because the opening diameter of the second fluid inlet 212 is smaller, the flow rate per unit time decreases. Under the same amount of steam, the fluid outlet 203 outputs the high-temperature target fluid.

[0052] In one embodiment, the first fluid inlet 211 and the second fluid inlet 212 are at different radial distances from the central axis X, while the inlet cross-sectional areas of the first fluid inlet 211 and the second fluid inlet 212 are the same. That is, the orifice sizes of the first fluid inlet 211 and the second fluid inlet 212 are the same, but their vertical distances from the central axis X are different. Adjusting the flow rate by the radial position difference can adapt to the spatial layout requirements of different emulsification equipment 100.

[0053] In one embodiment, the first fluid inlet 211 and the second fluid inlet 212 are located at different radial distances from the central axis X, and their inlet cross-sectional areas are also different. Based on the radial position difference, the flow rate is further adjusted by the orifice diameter difference, thus expanding the flow rate adjustment range. The circumferentially spaced layout of the first fluid inlet 211 and the second fluid inlet 212, combined with the differentiated inlet cross-sectional area design, ensures flow field symmetry to avoid temperature fluctuations, while also expanding the adjustment range through structural parameter combinations to adapt to different milk foam consistency and temperature requirements.

[0054] In one embodiment, the hollow body 20 includes a first inflow channel 221 communicating with a first fluid inlet 211 and a second inflow channel 222 communicating with a second fluid inlet 212. The conversion device 30 includes an inlet pipe 31 and a sealing pipe 32. The inlet pipe 31 is used to communicate with a liquid source. The conversion device 30 and the hollow body 20 have a first connection mode and a second connection mode. In the first connection mode, the inlet pipe 31 communicates with the first inflow channel 221, and the sealing pipe 32 is connected to the second inflow channel 222 to seal the second inflow channel 222. Liquid enters the negative pressure chamber 202 from the inlet pipe 31, the first inflow channel 221, and the first fluid inlet 211. In the second connection mode, the inlet pipe 31 communicates with the second inflow channel 222, and the sealing pipe 32 is connected to the first inflow channel 221 to seal the first inflow channel 221. Liquid enters the negative pressure chamber 202 from the inlet pipe 31, the second inflow channel 222, and the second fluid inlet 212. The temperature of the target fluid prepared in the first connection mode is different from the temperature of the target fluid prepared in the second connection mode. Please refer to... Figure 2 and Figure 9 The target fluid prepared in the first connection mode has a lower temperature, while the target fluid prepared in the second connection mode has a higher temperature.

[0055] The conversion device 30 has a tubular structure and can function as a pipe connector. Its two ends are connected to the liquid supply conduit and the hollow main body 20, respectively, facilitating disassembly and cleaning. The inlet pipe 31 is a hollow double-ended pipe, and the sealing pipe 32 can be a pipe closed at one end, a pipe closed at both ends, or a solid tubular structure. The conversion device 30's pipe connector design is simple and easy to manufacture. By simply changing the connection method between the inlet pipe 31 and the sealing pipe 32 and the first inflow channel 221 and the second inflow channel 222, different target fluids can be prepared. The operation is simple, does not involve complex parameter adjustments, and the prepared target fluids exhibit good consistency.

[0056] In one implementation, please refer to Figure 2 and Figure 9The first inflow channel 221 and the second inflow channel 222 are arranged side by side, and the inlet pipe 31 and the sealing pipe 32 are arranged side by side and constructed as a single unit. "Side by side" means that the first inflow channel 221 and the second inflow channel 222 are arranged parallel to each other in one direction, and the inlet pipe 31 and the sealing pipe 32 are integrally formed or mechanically connected to form a single structure. When the conversion device 30 is connected to the hollow body 20, the side-by-side arrangement of the inlet pipe 31 and the sealing pipe 32 allows them to be simultaneously aligned with the first inflow channel 221 and the second inflow channel 222. For example, when the conversion device 30 is inserted into the hollow body 20, the inlet pipe 31 is aligned with the first inflow channel 221 to deliver fluid to the first fluid inlet 211, while the sealing pipe 32 is aligned with the axis of the second inflow channel 222 to seal the second fluid inlet 212.

[0057] The integral construction of the inlet pipe 31 and the sealing pipe 32 reduces the assembly error of parts, improves the sealing reliability, and simplifies the assembly and user switching operation. Users only need to slide it out and then align and insert it.

[0058] Reference Figures 8 to 10 The hollow body 20 is also provided with an air channel 24 that connects to the external environment. The first inflow channel 221 and the second inflow channel 222 are respectively connected to the air channel 24. The liquid inlet pipe 31 can selectively open or block the air channel 24 to allow external air to enter or prevent external air from entering the negative pressure chamber 202, thereby forming a target fluid with or without foam.

[0059] The inlet pipe 31 connects to one of the fluid inlets and can also control whether external air is introduced. The simple connection structure between the conversion device 30 and the hollow body 20 can achieve the output of more target fluids. By switching the positions of the inlet pipe 31 and the blocking pipe 32, the fluid path can be switched, and the air channel 24 can be opened or blocked simultaneously, thereby flexibly outputting high-temperature or low-temperature, foam-containing or foam-free fluids.

[0060] In one embodiment, a through hole 25 is provided between the first inflow channel 221 and the second inflow channel 222, and the first inflow channel 221 and the second inflow channel 222 are connected through the through hole 25. The through hole 25 can be opened or sealed by the liquid inlet pipe 31 to open or block the air passage 24.

[0061] The through-hole 25 can connect to the external environment through the air channel 24, allowing either the first inflow channel 221 or the second inflow channel 222 to connect to the external environment. The liquid inlet pipe 31 also serves as an air inlet control, eliminating the need for additional components, thus making the emulsification equipment 100 both compact in structure and easier to operate. (Refer to...) Figure 2When the inlet pipe 31 is connected to the first inflow channel 221, the sealing pipe 32 is inserted into the second inflow channel 222. At this time, the design of the inlet pipe 31 ensures that the through hole 25 is not blocked, allowing external air to enter the first inflow channel 221 through the through hole 25. When milk is introduced through the inlet pipe 31, the air mixes with the milk to form foamy milk foam, which flows from the first fluid inlet 211 into the negative pressure chamber 202. The fluid outlet 203 outputs low-temperature hot milk foam containing foam. (Refer to...) Figure 12 When the inlet pipe 31 is switched to the first inflow channel 221, the sealing pipe 32 is inserted into the second inflow channel 222. The inlet pipe 31 extends into the first inflow channel 221 and completely blocks the through hole 25, thus sealing and isolating the through hole 25. The air passage 24 is blocked, and external air cannot enter the first inflow channel 221. Only milk enters the negative pressure chamber 202, and the fluid outlet 203 outputs low-temperature hot milk without foam. Among them, the inlet pipe 31 extending into the first inflow channel 221 is an inlet pipe 31 that can transport liquid.

[0062] Low-temperature hot milk foam is relative to high-temperature hot milk foam. Due to steam heating, both low-temperature and high-temperature hot milk foam are considered hot milk foam, but the temperature of low-temperature hot milk foam is lower than that of high-temperature hot milk foam.

[0063] Similarly, low-temperature heated milk is relative to high-temperature heated milk. Due to steam heating, both low-temperature heated milk and high-temperature heated milk are considered hot milk, only the temperature of low-temperature heated milk is lower than that of high-temperature heated milk. In one embodiment, the inlet pipe 31 can selectively extend into the first inlet channel 221 or the second inlet channel 222. The different connection lengths of the inlet pipe 31 into the first inlet channel 221 or the second inlet channel 222 are used to open or seal the through hole 25, thereby opening or blocking the air passage 24.

[0064] The connection length of the inlet pipe 31 refers to the longitudinal depth of the outlet of the inlet pipe 31 inserted into the inflow channel. The difference in the connection length of the inlet pipe 31 extending into the inflow channel can be achieved through the physical connection structure between the inlet pipe 31 and the hollow body 20. (Refer to...) Figure 2 When a foam-containing target fluid needs to be prepared, the inlet pipe 31 extends only shallowly into the first inflow channel 221, and the through hole 25 is not blocked. External air enters the first inflow channel 221 through this hole, mixes with the milk to form foamy milk foam, and enters the negative pressure chamber 202. The fluid outlet 203 outputs low-temperature hot foamy milk foam. (Refer to...) Figure 12When it is necessary to prepare a target fluid without foam, the depth of the liquid inlet pipe 31 into the first inlet channel 221 is increased, completely covering the through hole 25, that is, the through hole 25 is sealed and isolated, the air channel 24 is closed, and the outside air cannot enter the first inlet channel 221. Only milk enters the negative pressure chamber 202, and the fluid outlet 203 outputs low-temperature hot milk without foam.

[0065] Optionally, the inlet pipe 31 includes a first inlet pipe 311 and a second inlet pipe 312, with different connection lengths. Here, the connection length of the first inlet pipe 311 is defined as the effective insertion length between the first inlet pipe 311 and the first inlet channel 221 or the second inlet channel 222, and the connection length of the second inlet pipe 312 is defined as the effective insertion length between the second inlet pipe 312 and the first inlet channel 221 or the second inlet channel 222.

[0066] The first inlet pipe 311 has a shorter connection length than the second inlet pipe 312, and the sealing pipe 32 is located between the first inlet pipe 311 and the second inlet pipe 312. The sealing pipe 32 has a longer connection length than the first inlet pipe 311, and the connection lengths of the sealing pipe 32 and the second inlet pipe 312 are approximately equal. The connection length of the sealing pipe 32 is defined as the effective insertion length between the sealing pipe 32 and the first inlet channel 221 or the second inlet channel 222.

[0067] Reference Figure 2 When the first inlet pipe 311 is connected to the first inflow channel 221, its shorter length keeps the through hole 25 open. External air enters the first inflow channel 221 through the air channel 24 and the through hole 25, and finally outputs foamed milk from the fluid outlet 203. (Refer to...) Figure 12 When the second inlet pipe 312 is connected to the first inlet channel 221, its longer extension completely covers the through hole 25, the air channel 24 is closed, and external air cannot enter the first inlet channel 221. The fluid outlet 203 outputs milk without foam.

[0068] The first inlet pipe 311, the sealing pipe 32, and the second inlet pipe 312 are arranged side by side, that is, parallel in one direction. The first inlet pipe 311, the sealing pipe 32, and the second inlet pipe 312 are constructed as a single unit. When switching between different fluid inlets, it is only necessary to move the conversion device 30 and then align it with the target inflow channel and insert it again. The structural difference between the first inlet pipe 311 and the second inlet pipe 312 is achieved through the integral molding of the pipe joint, ensuring that the open or closed state of the through hole 25 is automatically matched during switching. That is, the first inlet pipe 311 will always open the through hole 25 regardless of which inflow channel it is inserted into, thereby opening the air channel 24, while the second inlet pipe 312 will always seal the through hole 25 regardless of which inflow channel it is inserted into, thereby sealing and cutting off the air channel 24, without the need for an additional control mechanism.

[0069] Of course, in other embodiments, only one inlet pipe 31 may be provided. One inlet pipe 31 has two connection lengths with the first inflow channel 221 and the second inflow channel 222. The preparation of target fluid containing foam and target fluid without foam can be achieved without completely separating the conversion device 30 from the hollow body 20.

[0070] In one embodiment, the liquid inlet pipe 31 includes a first liquid inlet pipe 311 and a second liquid inlet pipe 312. The first liquid inlet pipe 311 and the second liquid inlet pipe 312 are disposed on both sides of the sealing pipe 32. The first liquid inlet pipe 311 and the second liquid inlet pipe 312 can be selectively connected to the first inflow channel 221 or the second inflow channel 222, respectively. The first liquid inlet pipe 311 can open the air channel 24, and the second liquid inlet pipe 312 can seal the air channel 24.

[0071] Two inlet pipes are provided, one opening the through hole 25 and the other sealing the through hole 25, thereby opening the air channel 24 and sealing the air channel 24 respectively, for preparing target fluids containing foam and target fluids without foam. The first inlet pipe 311 and the second inlet pipe 312 can be symmetrically arranged relative to the sealing pipe 32. The inlet pipe 31 and the sealing pipe 32 are respectively interference-fitted with the hollow body 20. The hollow body 20 can be constructed as a soft rubber component. The sealing is achieved simultaneously by inserting and fixing the inlet pipe 31, the sealing pipe 32, and the hollow body 20. (Refer to...) Figure 2 and Figure 9 When selecting a target fluid containing foam, the first inlet pipe 311 is fluidly connected to one of the inflow channels, while the sealing pipe 32 physically isolates the fluid path from the other inflow channel, leaving the second inlet pipe 312 idle. External air is introduced by controlling the flow through different inlet pipes 31, eliminating the need for additional air intake regulation. The connection method between the conversion device 30 and the hollow body 20 corresponding to the target fluid is selected, ensuring the stability of the target fluid. The hollow body 20 precisely controls the introduction of air by connecting different inlet pipes 31, ensuring the reliability of the target fluid preparation.

[0072] In this embodiment, the first inlet pipe 311 and the second inlet pipe 312 can be configured as described above, i.e., the connection lengths of the first inlet pipe 311 and the second inlet pipe 312 are different, for example, the connection length of the first inlet pipe 311 is less than the connection length of the second inlet pipe 312. Of course, in other possible implementations, the connection lengths of the first inlet pipe 311 and the second inlet pipe 312 can also be the same, but the structure is different. For example, the connection lengths of the first inlet pipe 311 and the second inlet pipe 312 are the same, but a clearance port is provided on the pipe wall of the first inlet pipe 311 or the second inlet pipe 312. When the first inlet pipe 311 or the second inlet pipe 312 is inserted into one of the inflow channels, the clearance port corresponds to the through hole 25, so that the through hole 25 can remain open.

[0073] In one embodiment, the hollow body 20 is further provided with an air channel 24 communicating with the external environment, and the air channel 24 is connected to the second inflow channel 222; a through hole 25 is provided between the first inflow channel 221 and the second inflow channel 222, and the first inflow channel 221 and the second inflow channel 222 are connected through the through hole 25; the sealing pipe 32 is provided with a connecting groove 323, and external air enters the negative pressure chamber 202 (e.g., from the air channel 24 and the second inflow channel 222 in sequence) in sequence. Figure 9 and Figure 10 (As shown), or external air enters the negative pressure chamber 202 sequentially from the air channel 24, connecting groove 323, through hole 25, and the first inflow channel 221 (as shown). Figure 2 and Figure 3 (As shown).

[0074] The connecting groove 323 is constructed as a groove surrounding the outer wall of the sealing tube 32, and the through hole 25 is a through hole penetrating the side wall between the first inflow channel 221 and the second inflow channel 222. For example... Figure 2 and Figure 3 As shown, when the sealing tube 32 is inserted into the unused second inflow channel 222, the connecting groove 323 aligns with the air channel 24 and the through hole 25 to form an air passage. External air sequentially enters the activated first inflow channel 221 through the air channel 24, the connecting groove 323, and the through hole 25. For example, see... Figure 9 The outlet of the air passage 24 is located within the second inflow passage 222. When the sealing tube 32 is inserted into the first inflow passage 221, external air enters the second inflow passage 222 from the air passage 24. The width of the connecting groove 323 matches the diameter of the through hole 25 to ensure the effective cross-sectional area of ​​the air passage and avoid airflow fluctuations caused by processing errors.

[0075] By precisely aligning the connecting groove 323 with the through hole 25, the non-use channel is physically blocked, and an auxiliary air introduction path is simultaneously established to improve the stability of foam-containing fluid generation.

[0076] In one embodiment, the hollow body 20 includes an inflow channel 22 and an air channel 24. The inflow channel 22 is connected to a first fluid inlet 211 and a second fluid inlet 212. The air channel 24 is used to connect the inflow channel 22 to the external environment. The conversion device 30 includes a liquid inlet pipe 31, which is connected to the inflow channel 22 and is used to connect to a liquid source. Liquid enters the negative pressure chamber 202 sequentially from the liquid inlet pipe 31, the inflow channel, and one of the first fluid inlet 211 and the second fluid inlet 212. The liquid inlet pipe 31 allows or restricts the connection between the air channel 24 and the inflow channel 22 to allow or prevent external air from entering the inflow channel 22.

[0077] Liquid enters the negative pressure chamber 202 sequentially from the inlet pipe 31, the inflow channel 22, and the first fluid inlet 211, or liquid enters the negative pressure chamber 202 sequentially from the inlet pipe 31, the inflow channel 22, and the second fluid inlet 212.

[0078] Different connection methods between the inlet pipe 31 and the hollow body 20 allow the fluid outlet 203 to output both foam-containing and foam-free target fluids. When the fluid outlet 203 outputs foam-containing target fluid, the inlet pipe 31 allows the air channel 24 to communicate with the inflow channel 22; when the fluid outlet 203 outputs foam-free target fluid, the inlet pipe 31 restricts the communication between the air channel 24 and the inflow channel 22. By using different connection methods between the inlet pipe 31 and the hollow body 20, both foam-containing and foam-free target fluids can be prepared.

[0079] The inflow channel 22 can be constructed as a single-channel structure, and the inlet pipe 31 can be connected in different ways by varying its connection length or angle with the hollow body 20. Alternatively, the connection between the inlet pipe 31 and the hollow body 20 can simultaneously block one of the first fluid inlet 211 and the second fluid inlet 212 to output a high-temperature or low-temperature target fluid. Or, the connection between the inlet pipe 31 and the hollow body 20 can remain unblocked, allowing fluid to be introduced from both inlets to prepare a lower-temperature target fluid containing foam or without foam.

[0080] In one embodiment, the inlet pipe 31 includes a first inlet pipe 311 and a second inlet pipe 312, which are arranged side by side as a whole. The first inlet pipe 311 and the second inlet pipe 312 can be selectively connected to the inflow channel 22 so that the fluid outlet 203 outputs target fluid containing foam and target fluid without foam.

[0081] The side-by-side arrangement as a single unit can be achieved by the first liquid inlet pipe 311 and the second liquid inlet pipe 312 being integrally molded, or by assembling the first liquid inlet pipe 311 and the second liquid inlet pipe 312 into a single unit, with both arranged parallel to each other in one direction. (Refer to...) Figure 2 and Figure 9 When the first inlet pipe 311 is connected to the inflow channel 22, the second inlet pipe 312 is idle. External air enters the inflow channel 22 through the air channel 24 and mixes with the milk to form foamy milk. (Refer to...) Figure 12 and Figure 15 When the second inlet pipe 312 is connected to the inflow channel 22, the air channel 24 is closed, and only milk enters the negative pressure chamber 202 to output hot milk.

[0082] The first inlet pipe 311 and the second inlet pipe 312 can switch between the output of target fluid containing foam and target fluid without foam by the difference in their connection lengths. Alternatively, an allowance port can be provided on one of the inlet pipes to connect to the air channel 24.

[0083] In one embodiment, the inlet pipe 31 extends into the inflow channel 22 with different connection lengths, so that the fluid outlet 203 outputs target fluid containing foam and target fluid without foam.

[0084] The connection length refers to the depth to which the inlet pipe 31 is inserted into the inflow channel 22. When milk foam needs to be prepared, the inlet pipe 31 is inserted into the inflow channel 22 to a shallower depth, and external air enters the inflow channel 22 through the air channel 24, mixing with the milk to form foamy milk foam. When hot milk needs to be prepared, the inlet pipe 31 is inserted into the inflow channel 22 to a greater depth, the air channel 24 is closed, and only milk enters the negative pressure chamber 202, outputting hot milk without foam.

[0085] In one embodiment, the conversion device 30 further includes a blocking pipe 32, and the inflow channel 22 includes a first inflow channel 221 and a second inflow channel 222, which are respectively connected to a first fluid inlet 211 and a second fluid inlet 212; the liquid inlet pipe 31 can be selectively connected to one of the first inflow channel 221 and the second inflow channel 222 to introduce liquid, and the blocking pipe 32 can be selectively blocked to restrict the introduction of liquid.

[0086] The first inflow channel 221 and the second inflow channel 222 are independent channels. The inlet pipe 31 is used to introduce liquid from the liquid supply source, and the sealing pipe 32 is used to seal one of the inflow channels. (Refer to...) Figure 2 When the inlet pipe 31 is connected to the first inflow channel 221, the sealing pipe 32 is inserted into the second inflow channel 222. Liquid enters the first inflow channel 221 through the inlet pipe 31, and air enters the first inflow channel 221 through the air channel 24, forming low-temperature milk foam containing foam; see reference. Figure 15 When the inlet pipe 31 is switched to the second inlet channel 222, the sealing pipe 32 is inserted into the first inlet channel 221, the liquid enters the second inlet channel 222, the air channel 24 is closed, and foam-free high-temperature milk is output.

[0087] In one embodiment, the outlet of the air channel 24 is located in the second inflow channel 222. A through hole 25 is provided between the first inflow channel 221 and the second inflow channel 222. The first inflow channel 221 and the second inflow channel 222 are connected through the through hole 25. A connecting groove 323 is provided on the sealing pipe 32. The first inflow channel 221 is connected to the air channel 24 through the through hole 25 and the connecting groove 323.

[0088] By providing a connecting groove 323 on the sealing pipe 32, both the first inflow channel 221 and the second inflow channel 222 can introduce gas from the air channel 24, ensuring the consistency of the production of foam-containing target fluid and simplifying the structure of the hollow body 20.

[0089] In one embodiment, the inlet pipe 31 includes a first inlet pipe 311 and a second inlet pipe 312. When the first inlet pipe 311 is connected to the first inlet channel 221 or the second inlet channel 222, the through hole 25 is opened and the fluid outlet 203 outputs the target fluid containing foam. When the second inlet pipe 312 is connected to the first inlet channel 221 or the second inlet channel 222, the through hole 25 is sealed and the fluid outlet 203 outputs the target fluid without foam.

[0090] Two independent inlet pipes are set up for preparing target fluids containing foam and those without foam, respectively, to ensure more reliable preparation of the target fluid.

[0091] In one embodiment, the air passage 24 is provided with a one-way valve 41, which allows one-way communication between external air and the negative pressure chamber 202. Please refer to [reference needed]. Figure 2 The one-way valve 41 allows one-way communication of external air to the second inflow channel 222, preventing liquid from flowing back into the air channel 24.

[0092] The emulsification device 100 also includes an air inlet plate 42 disposed in the air passage 24. Along the direction of air entering the second inflow passage 222, the air inlet plate 42 is disposed upstream of the one-way valve 41. The air inlet plate 42 has an air inlet hole, and the one-way valve 41 is connected to the external environment through the air inlet hole.

[0093] A sealing plug 43 is installed at the inlet of air passage 24. The air inlet plate 42 and the one-way valve 41 are fixed within air passage 24 via the sealing plug 43. Air passage 24 is an external communication path passing through one side of the second inflow passage 222. The air inlet plate 42 can be a thin sheet of metal with micropores on its surface serving as air inlets. The one-way valve 41, a duckbill valve or umbrella valve, is installed downstream of the air inlet plate 42, allowing only one-way airflow into the second inflow passage 222 to prevent liquid backflow. The sealing plug 43 is fixed to the inlet of air passage 24 via threads or an interference fit. The air inlet plate 42 and the one-way valve 41 are pressed tightly against the inner wall of air passage 24 by the sealing plug 43 to ensure airtightness. When external air enters air passage 24 through the air inlet, the one-way valve 41 opens under air pressure, allowing air to enter the second inflow passage 222. When steam is no longer introduced into the negative pressure chamber 202, the one-way valve 41 closes, preventing milk backflow into air passage 24.

[0094] The microporous design of the air intake plate 42 prevents large particles of impurities from clogging the air passage 24, while the sealing plug 43 is designed to be removable for easy maintenance and cleaning. The coordinated design of the one-way valve 41 and the air intake plate 42 ensures the reliability of air introduction and enhances the system's backflow prevention capability, making it suitable for high-frequency use scenarios in emulsification equipment.

[0095] Reference Figures 1 to 16 As shown, in one embodiment, the emulsification device 100 includes a hollow body 20, which has a Venturi structure. The Venturi structure includes a steam channel 201 and a negative pressure chamber 202. The steam channel 201 is used to connect to a steam source. The hollow body 20 has a fluid inlet and a fluid outlet 203 respectively connected to the negative pressure chamber 202. The emulsification device 100 also includes a conversion device 30 detachably connected to the hollow body 20. The conversion device 30 includes a first inlet pipe 311 and a second inlet pipe 312. The conversion device 30 has multiple connection modes relative to the hollow body 20. In different connection modes, the first inlet pipe 311 and the second inlet pipe 312 are selectively connected to the fluid inlet to output target fluids with different temperatures or properties from the fluid outlet 203.

[0096] For example, in one connection mode, the first inlet pipe 311 is connected to the negative pressure chamber 202, and the second inlet pipe 312 is idle. Under the action of the first negative pressure, the liquid enters the negative pressure chamber 202 from the first inlet pipe 311 and the fluid inlet. In another connection mode, the second inlet pipe 312 is connected to the negative pressure chamber 202, and the first inlet pipe 311 is idle. Under the action of the second negative pressure, the liquid enters the negative pressure chamber from the second inlet pipe 312 and the fluid inlet. From one connection mode to another, the conversion device 30 is separated from the hollow body 20 and reconnected. The temperature or properties of the target fluid output from the fluid outlet 203 change.

[0097] In different connection modes, fluid outlet 203 outputs target fluids of different temperatures or properties. For example, when the liquid introduced into the negative pressure chamber 202 is milk, fluid outlet 203 outputs target fluids of different temperatures, namely high-temperature hot milk / hot milk foam and low-temperature hot milk / hot milk foam, and target fluids of different properties, namely high-temperature / low-temperature hot milk or high-temperature / low-temperature hot milk foam.

[0098] In the above embodiments, the first liquid inlet pipe 311 and the second liquid inlet pipe 312 are respectively connected to the negative pressure chamber 202 through different connection methods. That is to say, there is no limit to the number of fluid inlets. There can be one or three or more fluid inlets. The negative pressure at the fluid inlet is changed by the different connection methods between the first liquid inlet pipe 311 or the second liquid inlet pipe 312 and the hollow body 20.

[0099] Based on a single Venturi structure, this emulsifying equipment, combined with different connection methods between the conversion device 30 and the hollow main body 20, can achieve various output modes for target fluids, such as high temperature, low temperature, or whether or not foam is present, thereby meeting users' needs for different tastes, temperatures, or foam states. Furthermore, the emulsifying equipment has a relatively compact structure and fewer parts, significantly reducing equipment costs and cleaning and maintenance difficulties, while also improving user convenience and the stability of beverage quality.

[0100] For example, if only one fluid inlet is provided, and the first inlet pipe 311 and the second inlet pipe 312 are respectively connected to the negative pressure chamber 202 through the fluid inlet, the orifice diameter or cross-sectional area of ​​the fluid inlet is different. For example, the first inlet pipe 311 or the second inlet pipe 312 can block part of the fluid inlet to change the cross-sectional area of ​​the fluid inlet; or the first inlet pipe 311 or the second inlet pipe 312 can pass through the fluid inlet to change the orifice diameter of the fluid inlet.

[0101] In one embodiment, the fluid inlet includes a first fluid inlet 211 and a second fluid inlet 212, which are spaced apart on the cavity wall of the negative pressure chamber 202. In different connection modes, the first inlet pipe 311 and the second inlet pipe 312 can be selectively connected to the first fluid inlet 211 or the second fluid inlet 212, respectively. The conversion device 30 also includes a blocking pipe 32, which restricts the introduction of liquid into the negative pressure chamber 202 from the first fluid inlet 211 or the second fluid inlet 212 in different connection modes.

[0102] For example, in one connection mode, the first inlet pipe 311 is connected to the negative pressure chamber 202 through the first fluid inlet 211, and the sealing pipe 32 restricts the introduction of liquid from the second fluid inlet 212 into the negative pressure chamber 202; in another connection mode, the second inlet pipe 312 is connected to the negative pressure chamber 202 through the second fluid inlet 211, and the sealing pipe 32 restricts the introduction of liquid from the first fluid inlet 212 into the negative pressure chamber 202.

[0103] By defining the first negative pressure and the second negative pressure by using the first fluid inlet 211 and the second fluid inlet 212 respectively, the amount of fluid introduced into the negative pressure chamber 202 is more accurate, and the consistency of the prepared target fluid is better.

[0104] In one embodiment, the hollow body 20 includes a first inflow channel 221 and a second inflow channel 222. The first inflow channel 221 is connected to a first fluid inlet 211, and the second inflow channel 222 is connected to a second fluid inlet 212. A first inlet pipe 311 extends into the first inflow channel 221 and the second inflow channel 222 respectively to output target fluids of different temperatures from the fluid outlet 203. A second inlet pipe 312 extends into the first inflow channel 221 and the second inflow channel 222 respectively to output target fluids of different temperatures from the fluid outlet 203. The first inlet pipe 311 and the second inlet pipe 312 extend into the first inflow channel 221 respectively to output target fluids of different properties. The first inlet pipe 311 and the second inlet pipe 312 extend into the second inflow channel 222 respectively to output target fluids of different properties.

[0105] The first inlet pipe 311 and the second inlet pipe 312 are respectively connected to the first inflow channel 221 and the second inflow channel 222, which can realize the preparation of more different types of target fluids, thereby improving the user experience.

[0106] In addition, the hollow body 20 is also provided with an air channel 24 that connects to the external environment. The specific structure of the air channel 24, the first inflow channel 221, the second inflow channel 222, the first liquid inlet pipe 311, the sealing pipe 313, the second liquid inlet pipe 312, the first fluid inlet 211, and the second fluid inlet 212 is the same as that in the above-described embodiment, and will not be described again here.

[0107] In one embodiment, refer to Figures 1 to 16 The conversion device 30 can cooperate with the hollow body 20 having a venturi structure to deliver liquid to the negative pressure chamber 202 of the hollow body 20. The conversion device 30 includes a first inlet pipe 311, a second inlet pipe 312, and a sealing pipe 32 arranged side by side. The first inlet pipe 311 and the second inlet pipe 312 are respectively disposed on both sides of the sealing pipe 32. The connection method between the conversion device 30 and the hollow body 20 satisfies at least one of the following characteristics:

[0108] The first inlet pipe 311 is idle, the second inlet pipe 312 is connected to one of the first fluid inlet 211 and the second fluid inlet 212, and the sealing pipe 32 restricts the fluid input from the other of the first fluid inlet 211 and the second fluid inlet 212 to the negative pressure chamber 202;

[0109] The second inlet pipe 312 is idle. The first inlet pipe 311 is connected to one of the first fluid inlet 211 and the second fluid inlet 212. The sealing pipe 32 restricts the fluid input from the other of the first fluid inlet 211 and the second fluid inlet 212.

[0110] The parallel arrangement refers to the first inlet pipe 311, the sealing pipe 32, and the second inlet pipe 312 being arranged linearly in one direction, with the sealing pipe 32 located between the first inlet pipe 311 and the second inlet pipe. When one of the first inlet pipe 311 and the second inlet pipe 312 is connected to one of the first fluid inlet 211 and the second fluid inlet 212, the other of the first inlet pipe 311 and the second inlet pipe 312 is in an idle state, while the sealing pipe 32 is used to seal the other of the first fluid inlet 211 and the second fluid inlet 212. The idle state means that the inlet pipe 31 is not connected to the currently used fluid inlet, and its output end is not inserted into the hollow body 20.

[0111] Reference Figures 1 to 3 The first inlet pipe 311 is connected to the first fluid inlet 211, and the sealing pipe 32 restricts the fluid input from the second fluid inlet 212. The second inlet pipe 312 is idle and can be used to prepare low-temperature foamy target fluids, such as low-temperature hot milk foam; see reference. Figures 8 to 10 The first inlet pipe 311 is connected to the second fluid inlet 212. The sealing pipe 32 restricts the fluid input from the first fluid inlet 211. The second inlet pipe 312 is idle and can be used to prepare high-temperature foamy target fluids, such as high-temperature hot milk foam. (Refer to...) Figures 11 to 13 The second inlet pipe 312 is connected to the first fluid inlet 211. The sealing pipe 32 restricts the fluid input from the second fluid inlet 212, and the first inlet pipe 311 is idle. It can be used to prepare low-temperature, foam-free target fluids, such as low-temperature heated milk; see reference. Figures 14 to 16The second inlet pipe 312 is connected to the second fluid inlet 212. The sealing pipe 32 restricts the fluid input from the first fluid inlet 211. The first inlet pipe 311 is idle and can be used to prepare high-temperature foamy target fluids, such as high-temperature hot milk.

[0112] By simply controlling the connection between the conversion device 30 and the hollow body 20, different target fluids can be prepared. Moreover, the temperature or foam content of the target fluid has been precisely set, eliminating the need for manual control, and the quality of the target fluid meets user requirements. Furthermore, the entire emulsification equipment 100 adopts a Venturi structure, resulting in fewer parts and fewer critical dimensions, thus lowering costs and making subsequent cleaning and maintenance easier, leading to a better user experience.

[0113] In one embodiment, the first fluid inlet 211 and the second fluid inlet 212 are configured to have different flow rates of fluid input into the negative pressure chamber 202 per unit time. For example, the flow rate from the first fluid inlet 211 is greater than the flow rate from the second inlet. When fluid is introduced into the negative pressure chamber 202 from the first fluid inlet 211, it is used to output a low-temperature target fluid, and when fluid is introduced into the negative pressure chamber 202 from the second fluid inlet 212, it is used to output a high-temperature target fluid.

[0114] The first liquid inlet pipe 311 and the second liquid inlet pipe 312 can be configured to have different connection lengths or different shapes to cooperate with the hollow body 20, thereby controlling whether external air is introduced into the negative pressure chamber 202. For example, refer to Figure 2 and Figure 9 The first inlet pipe 311 is configured to allow external air to enter the negative pressure chamber 202 when connected to one of the first fluid inlet 211 and the second fluid inlet 212, thereby enabling the output of the target fluid containing foam; see reference. Figure 12 and Figure 15 When the second inlet pipe 312 is connected to one of the first fluid inlet 211 and the second fluid inlet 212, it restricts the entry of external air into the negative pressure chamber 202, thereby allowing the output of the target fluid that does not contain foam.

[0115] In one embodiment, the hollow body 20 further includes an air channel 24, and the sealing tube 32 is provided with a connecting groove 323, which can connect to the air channel 24; the connection length of the first liquid inlet tube 311 to the hollow body 20 is different from the connection length of the second liquid inlet tube 312 to the hollow body 20; the connection length of one of the first liquid inlet tube 311 and the second liquid inlet tube 312 to the hollow body 20 extends beyond the connecting groove 323 along the length direction of the sealing tube 32, so as to seal the air channel 24; the connection length of the other of the first liquid inlet tube 311 and the second liquid inlet tube 312 to the hollow body 20 does not extend beyond the connecting groove 323 along the length direction of the sealing tube 32, so as to open the air channel 24.

[0116] The connection length between the first liquid inlet pipe 311 and the second liquid inlet pipe 312 controls whether air is introduced. The conversion device 30 has a simple structure and is easy to manufacture.

[0117] Reference Figure 17 and Figure 18 In one embodiment, the emulsifying device 100 further includes a housing assembly 50, which defines a receiving space. A hollow body 20 is installed in the receiving space. A steam passage 201 has a steam outlet 205, which defines a central axis X. The central axis X extends in a vertical direction. The entry direction of the first fluid inlet 211 and the entry direction of the second fluid inlet 212 are both arranged in a horizontal direction. The housing assembly 50 is provided with a clearance opening 521. A conversion device 30 is detachably connected to the hollow body 20 in a horizontal direction from the clearance opening 521.

[0118] The vertical direction refers to the direction of steam flow after exiting the steam outlet 205, which is perpendicular to the horizontal plane. The entry direction of the first fluid inlet 211 and the second fluid inlet 212 is horizontal and perpendicular to the central axis X. By installing the hollow body 20 inside the outer casing assembly 50, the hollow body 20 can be stably supported, facilitating repeated insertion and connection with the conversion device 30.

[0119] The housing assembly 50 includes a base 51 and an outer cover 52 covering the base 51, forming a receiving space between the outer cover 52 and the base 51. The base 51 has a mounting groove 512, and the hollow body 20 is interference-fitted with the mounting groove 512 to secure the hollow body 20 on the base 51. A steam nozzle 23 is vertically mounted on the base 51 via a threaded connection, defining a steam passage 201. The steam nozzle 23 can be constructed as a flexible rubber component and connected to the hollow body 20 via an interference fit. The hollow body 20 can also be constructed as a flexible rubber component, and the conversion device 30 can also be connected to the hollow body 20 via an interference fit to achieve sealing and fastening. Flexible rubber components include, for example, silicone or rubber components.

[0120] The clearance opening 521 is a horizontal through hole on the side wall of the housing assembly 50. The clearance opening 521 can be located on the top cover, and its size matches the cross-section of the conversion device 30. When the user inserts or removes the conversion device 30 horizontally, the sealing pipe 32 automatically aligns with the unused channel to achieve sealing. The vertical installation design of the hollow body 20 optimizes the steam flow direction, i.e., it sprays downwards along the direction of gravity, reducing turbulence interference. Simultaneously, it facilitates horizontal insertion and removal operations with the conversion device 30, improving the equipment's compactness. The mounting groove 512 on the base 51 ensures the axial positioning accuracy of the conversion device 30 during switching, preventing seal failure due to insertion / removal misalignment.

[0121] The detachable connection between the conversion device 30 and the hollow body 20 is achieved through an interference fit. When disassembling, the user can simply pull out the connector horizontally to perform the conversion. The outer shell assembly 50 defines the vertical steam flow and horizontal fluid input of the hollow body 20. Together with the horizontal operation design of the conversion device 30, it optimizes the fluid mixing efficiency and improves the user's ease of operation through ergonomic design.

[0122] The following will describe in detail the state of the emulsification equipment 100 when it outputs different target fluids.

[0123] Reference Figures 1 to 3 In the first connection mode, the conversion device 30 and the hollow body 20 are connected. The shorter first inlet pipe 311 is inserted into the first inflow channel 221, the longer second inlet pipe 312 is idle, and the sealing pipe 32 is inserted into the second inflow channel 222. Because the connection length of the sealing pipe 32 exceeds the position of the through hole 25, the second inflow channel 222 is completely sealed. The first inlet pipe 311 does not reach the position of the through hole 25. When the steam channel 201 outputs high-speed steam from the steam outlet 205, a negative pressure is generated in the negative pressure chamber 202. Liquid enters the first inflow channel 221 from the first inlet pipe 311, and external air flows along... Figure 3 As shown by the arrow, the air enters the second inflow channel 222 through the air channel 24, and then enters the first inflow channel 221 through the connecting groove 323 and the through hole 25. After mixing in the first inflow channel 221, the liquid and air enter the negative pressure chamber 202 through the first fluid inlet 211. Since the pressure at the first fluid inlet 211 is less than the pressure at the second fluid inlet 212 (because the negative pressure chamber 202 generates negative pressure, the absolute value of the pressure at the first fluid inlet 211 is greater than the absolute value of the pressure at the second fluid inlet 212), the total amount of steam remains unchanged, but the amount of liquid and air mixture per unit time relatively increases. Therefore, compared to the second fluid inlet 212, the temperature of the foam-containing target fluid produced by the first inflow channel 221 is lower. For example, if the input liquid is milk, the output from the fluid outlet 203 is low-temperature hot milk foam.

[0124] Reference Figures 8 to 10 In the second connection mode, the conversion device 30 and the hollow body 20 are connected. The shorter first inlet pipe 311 is inserted into the second inflow channel 222, while the longer second inlet pipe 312 remains idle. The sealing pipe 32 is inserted into the first inflow channel 221. Because the connection length of the sealing pipe 32 exceeds the position of the through hole 25, the first inflow channel 221 is completely sealed. The first inlet pipe 311 does not reach the position of the through hole 25. When the steam channel 201 outputs high-speed steam from the steam outlet 205, a negative pressure is generated in the negative pressure chamber 202. Liquid enters the second inflow channel 222 from the first inlet pipe 311, and external air flows along... Figure 9As shown by the arrow, the liquid enters the second inflow channel 222 through the air channel 24. After mixing in the second inflow channel 222, the liquid and air enter the negative pressure chamber 202 through the second fluid inlet 212. Because the pressure at the second fluid inlet 212 is greater than the pressure at the first fluid inlet 211 (since the negative pressure chamber 202 generates negative pressure, the absolute value of the pressure at the second fluid inlet 212 is less than the absolute value of the pressure at the first fluid inlet 211), the total amount of steam remains constant, and the amount of liquid and air mixed per unit time decreases relatively. Therefore, compared to the first fluid inlet 211, the temperature of the foam-containing target fluid produced by the second inflow channel 222 is higher. For example, if the input liquid is milk, the output from the fluid outlet 203 will be high-temperature hot milk foam.

[0125] Reference Figures 11 to 13 In the third connection mode, the conversion device 30 and the hollow body 20 are connected. The longer second inlet pipe 312 is inserted into the first inflow channel 221, the shorter first inlet pipe 311 is left idle, and the sealing pipe 32 is inserted into the second inflow channel 222. Because the connection length of the sealing pipe 32 exceeds the position of the through hole 25, the second inflow channel 222 is completely sealed. Since the connection length of the second inlet pipe 312 exceeds the position of the through hole 25, the second inlet pipe 312 seals the through hole 25, and external air flows along... Figure 13 As shown by the arrow, air enters the second inflow channel 222 through the air channel 24, then passes through the connecting groove 323 to the through hole 25. The through hole 25 is blocked by the second liquid inlet pipe 312, so air cannot enter the first inflow channel 221. When the steam channel 201 outputs high-speed steam from the steam outlet 205, a negative pressure is generated in the negative pressure chamber 202. Only liquid enters the first inflow channel 221 from the first liquid inlet pipe 311, and then enters the negative pressure chamber 202 from the first fluid inlet 211. Since the pressure at the first fluid inlet 211 is less than the pressure at the second fluid inlet 212 (because a negative pressure is generated in the negative pressure chamber 202, the absolute value of the pressure at the first fluid inlet 211 is greater than the absolute value of the pressure at the second fluid inlet 212), the total amount of steam remains unchanged, while the liquid increases relatively per unit time. Therefore, compared to the second fluid inlet 212, the temperature of the foam-free target fluid produced by the first inflow channel 221 is lower. For example, if the input liquid is milk, the liquid output from the fluid outlet 203 is low-temperature hot milk.

[0126] Reference Figures 14 to 16In the fourth connection mode, the conversion device 30 and the hollow body 20 are connected. The longer second inlet pipe 312 is inserted into the second inflow channel 222, the shorter first inlet pipe 311 is idle, and the sealing pipe 32 is inserted into the first inflow channel 221. Because the connection length of the sealing pipe 32 exceeds the position of the through hole 25, the first inflow channel 221 is completely sealed. Since the connection length of the second inlet pipe 312 exceeds the position of the through hole 25, the second inlet pipe 312 seals the through hole 25, and external air flows along... Figure 16 As shown by the arrow, air cannot enter the second inflow channel 222 through air channel 24. When high-speed steam is output from steam outlet 205 in steam channel 201, a negative pressure is generated in negative pressure chamber 202. Only liquid enters the second inflow channel 222 from the second inlet pipe 312, and then enters the negative pressure chamber 202 from the second fluid inlet 212. Since the pressure at the second fluid inlet 212 is greater than the pressure at the first fluid inlet 211 (because a negative pressure is generated in negative pressure chamber 202, the absolute value of the pressure at the second fluid inlet 212 is less than the absolute value of the pressure at the first fluid inlet 211), the total amount of steam remains unchanged, but the liquid decreases relatively per unit time. Therefore, compared to the first fluid inlet 211, the temperature of the target fluid produced by the second inflow channel 222 is higher and free of foam. For example, if the input liquid is milk, the liquid output from fluid outlet 203 will be hot milk at high temperature.

[0127] The aforementioned multiple connection modes are achieved through the translational operation or translational and rotational operation of the conversion device 30. For example, when switching from the target fluid mode of high-temperature hot milk foam to the target fluid mode of low-temperature hot milk, the user pulls out the conversion device 30 along the extension direction of the first inlet pipe 311 or the second inlet pipe 312, then translates it along the central axis X to the target position and reinserts it. The sealing tube 32 automatically aligns with the unused channel to achieve sealing. When switching from the target fluid mode of high-temperature hot milk foam to the target fluid mode of low-temperature hot milk foam, the user pulls out the conversion device 30 along the extension direction of the first inlet pipe 311 or the second inlet pipe 312, then rotates it 180 degrees around an axis parallel to the extension direction of the first inlet pipe 311, then translates it along the central axis X to the target position and reinserts it. The sealing tube 32 automatically aligns with the unused channel to achieve sealing.

[0128] The first inlet pipe 311, the second inlet pipe 312, and the sealing pipe 32 are arranged side by side and are an integral structure. Physical symmetry reduces assembly errors and ensures precise isolation of the fluid path during switching. Multiple positions can be switched using pipe fittings to adapt to the four different target fluid output modes. This reduces the number of parts and automatically matches the air channel 24 state based on structural parameter differences, improving user operating efficiency and system reliability.

[0129] In one embodiment, a beverage machine is also provided, which includes the emulsifying device 100 as described in any of the above embodiments. The beverage machine also includes a steam output connector 55, and a steam channel 201 is connected to the steam output connector 55. The steam output connector 55 can be mounted on the base 51 of the housing assembly 50 for easy connection to the steam nozzle 23. The steam output connector 55 is connected to the steam generation system of the beverage machine, and the steam pressure can be adjusted by an electronic control module to suit different needs.

[0130] The beverage machine also includes a display screen that, in response to a user-selected target fluid preparation signal, dynamically plays an installation animation of the conversion device 30 corresponding to the selected mode. For example, in the high-temperature hot milk mode, it displays a schematic animation of the horizontal insertion of the second inlet tube 312; in the low-temperature hot milk foam mode, it displays an exploded diagram of the insertion of the first inlet tube 311 and the sealing path of the sealing tube 32. The animation can use arrows to indicate the operation direction and the alignment relationship between each inlet tube and the inflow channel, reducing the risk of user misoperation.

[0131] The interactive logic of the display screen and the physical structural parameters of the conversion device 30 are designed in synergy to ensure that the animation guidance and actual operation are perfectly matched. The animation guidance function of the display screen and the parametric design of the physical structure of the conversion device 30 work together to form a closed-loop control, ensuring precise matching of user operation, fluid path switching and temperature regulation.

[0132] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0133] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. An emulsification device, comprising a hollow body, wherein the hollow body is provided with a Venturi structure; Its features are, The Venturi structure includes a steam channel and a negative pressure chamber. The steam channel is used to connect to a steam source, and the hollow body has a fluid inlet and a fluid outlet respectively connected to the negative pressure chamber. The emulsification equipment also includes a conversion device detachably connected to the hollow body. The conversion device includes a first liquid inlet pipe and a second liquid inlet pipe, and the conversion device has multiple connection modes relative to the hollow body. In different connection modes, either the first inlet pipe or the second inlet pipe is connected to the fluid inlet to output target fluids with different temperatures or properties from the fluid outlet.

2. The emulsification equipment according to claim 1, characterized in that, The fluid inlet includes a first fluid inlet and a second fluid inlet, which are spaced apart on the wall of the negative pressure chamber. In different connection modes, the first liquid inlet pipe and the second liquid inlet pipe can be selectively connected to the first fluid inlet or the second fluid inlet, respectively; The conversion device also includes a sealing tube, which, under different connection modes, restricts the introduction of liquid into the negative pressure chamber from either the first fluid inlet or the second fluid inlet.

3. The emulsification equipment according to claim 2, characterized in that, The hollow body includes a first inflow channel and a second inflow channel, wherein the first inflow channel is connected to the first fluid inlet and the second inflow channel is connected to the second fluid inlet; The first inlet pipe extends into the first inflow channel and the second inflow channel respectively to output target fluids of different temperatures from the fluid outlet; the second inlet pipe extends into the first inflow channel and the second inflow channel respectively to output target fluids of different temperatures from the fluid outlet; the first inlet pipe and the second inlet pipe extend into the first inflow channel respectively to output target fluids of different properties; the first inlet pipe and the second inlet pipe extend into the second inflow channel respectively to output target fluids of different properties.

4. An emulsification device, comprising a hollow body, wherein the hollow body is provided with a Venturi structure; Its features are, The Venturi structure includes a steam channel and a negative pressure chamber. The steam channel is used to connect to a steam source. The negative pressure chamber has a first fluid inlet and a second fluid inlet spaced apart on its wall. The hollow body has a fluid outlet that connects to the negative pressure chamber. Fluid can selectively enter the negative pressure chamber from either the first fluid inlet or the second fluid inlet, so that different target fluids are output from the fluid outlet; The emulsification device also includes a conversion device connected to the hollow body, which can operably control the fluid to enter the negative pressure chamber from the first fluid inlet or the second fluid inlet.

5. The emulsification equipment according to claim 4, characterized in that, The steam passage has a steam outlet that defines a central axis, and along the extension direction of the central axis, the first fluid inlet and the second fluid inlet are spaced apart.

6. The emulsification equipment according to claim 5, characterized in that: The first fluid inlet and the second fluid inlet are equidistant from the central axis, and their inlet cross-sectional areas are identical; or, The first fluid inlet and the second fluid inlet are at different radial distances from the central axis, and the first fluid inlet and the second fluid inlet have different inlet cross-sectional areas; or, The first fluid inlet and the second fluid inlet are equidistant from the central axis, but their inlet cross-sectional areas are different; or, The first fluid inlet and the second fluid inlet are at different radial distances from the central axis, and the first fluid inlet and the second fluid inlet have the same inlet cross-sectional area.

7. The emulsification equipment according to claim 4, characterized in that, The steam passage has a steam outlet that defines a central axis, and the first fluid inlet and the second fluid inlet are circumferentially spaced along the central axis.

8. The emulsification equipment according to claim 7, characterized in that: The first fluid inlet and the second fluid inlet are equidistant from the central axis, but their inlet cross-sectional areas are different; or, The first fluid inlet and the second fluid inlet are at different radial distances from the central axis, and the first fluid inlet and the second fluid inlet have the same inlet cross-sectional area; or, The first fluid inlet and the second fluid inlet are at different radial distances from the central axis, and the first fluid inlet and the second fluid inlet have different inlet cross-sectional areas.

9. The emulsification equipment according to claim 4, characterized in that, The hollow body includes a first inflow channel connected to the first fluid inlet and a second inflow channel connected to the second fluid inlet; The conversion device includes an inlet pipe and a sealing pipe. The inlet pipe is used to connect to a liquid source. The conversion device and the hollow body have a first connection mode and a second connection mode. In the first connection mode, the liquid inlet pipe is connected to the first inflow channel, and the sealing pipe is connected to the second inflow channel to block the second inflow channel. Liquid enters the negative pressure chamber from the liquid inlet pipe, the first inflow channel and the first fluid inlet. In the second connection mode, the inlet pipe is connected to the second inflow channel, and the sealing pipe is connected to the first inflow channel to seal the first inflow channel. Liquid enters the negative pressure chamber from the inlet pipe, the second inflow channel, and the second fluid inlet.

10. The emulsification equipment according to claim 9, characterized in that, The first inflow channel and the second inflow channel are arranged side by side, and the liquid inlet pipe and the sealing pipe are arranged side by side and constructed as a whole.

11. The emulsifying equipment according to claim 9, characterized in that, The hollow body is also provided with an air channel that connects to the external environment. The first inflow channel and the second inflow channel are respectively connected to the air channel. The liquid inlet pipe can selectively open or block the air channel to allow external air to enter or prevent external air from entering the negative pressure chamber.

12. The emulsifying equipment according to claim 11, characterized in that, A through hole is provided between the first inflow channel and the second inflow channel, and the first inflow channel and the second inflow channel are connected through the through hole; the liquid inlet pipe can be selectively extended into the first inflow channel or the second inflow channel, and the connection length of the liquid inlet pipe extending into the first inflow channel or the second inflow channel is different to open or seal the through hole, thereby opening or blocking the air channel.

13. The emulsifying equipment according to claim 11, characterized in that, The inlet pipe includes a first inlet pipe and a second inlet pipe, which are located on both sides of the sealing pipe. The first inlet pipe and the second inlet pipe can be selectively connected to the first inflow channel or the second inflow channel, respectively. The first inlet pipe can open the air channel, and the second inlet pipe can seal the air channel.

14. The emulsifying equipment according to claim 9, characterized in that, The hollow body is also provided with an air channel that connects to the external environment, and the air channel is connected to the second inflow channel; a through hole is provided between the first inflow channel and the second inflow channel, and the first inflow channel and the second inflow channel are connected through the through hole; The sealing tube is provided with a connecting groove, and external air enters the negative pressure chamber sequentially from the air channel and the second inflow channel, or external air enters the negative pressure chamber sequentially from the air channel, the connecting groove, the through hole and the first inflow channel.

15. The emulsifying equipment according to claim 4, characterized in that, The hollow body includes an inflow channel and an air channel. The inflow channel connects the first fluid inlet and the second fluid inlet. The air channel is used to connect the inflow channel to the external environment. The conversion device includes a liquid inlet pipe, which is connected to the inflow channel and is used to connect to a liquid source. Liquid enters the negative pressure chamber sequentially from the liquid inlet pipe, the inflow channel, and one of the first fluid inlet and the second fluid inlet. The inlet pipe allows or restricts communication between the air passage and the inflow passage, so as to allow or prevent external air from entering the inflow passage.

16. The emulsifying equipment according to claim 15, characterized in that, The inlet pipe includes a first inlet pipe and a second inlet pipe, which are arranged side by side as a whole. The first inlet pipe and the second inlet pipe can be selectively connected to the inflow channel so that the fluid outlet outputs the target fluid containing foam and the target fluid without foam. And / or, The conversion device further includes a blocking pipe, and the inflow channel includes a first inflow channel and a second inflow channel, the first inflow channel and the second inflow channel being respectively connected to the first fluid inlet and the second fluid inlet; the liquid inlet pipe can be selectively connected to one of the first inflow channel and the second inflow channel to introduce liquid, and the blocking pipe can be selectively blocked to the other of the first inflow channel and the second inflow channel to restrict the introduction of liquid.

17. The emulsifying equipment according to claim 11 or 15, characterized in that, The air passage is equipped with a one-way valve, which allows one-way communication between external air and the negative pressure chamber.

18. The emulsifying equipment according to claim 4, characterized in that, It also includes a housing assembly that defines an accommodating space, in which the hollow body is installed, the steam passage having a steam outlet defining a central axis that extends vertically, the inlet directions of the first fluid inlet and the second fluid inlet both being horizontally oriented, the housing assembly having a clearance opening, and the conversion device being detachably connected to the hollow body horizontally from the clearance opening.

19. A conversion device, cooperating with a hollow body having a venturi structure for conveying liquid into a negative pressure chamber of the hollow body, characterized in that, The conversion device includes a first inlet pipe, a second inlet pipe, and a sealing pipe arranged side by side. The first inlet pipe and the second inlet pipe are respectively located on both sides of the sealing pipe. The wall of the negative pressure chamber is provided with a first fluid inlet and a second fluid inlet at intervals. The connection method between the conversion device and the hollow body satisfies at least one of the following characteristics: The first inlet pipe is idle, the second inlet pipe is connected to one of the first fluid inlet and the second fluid inlet, and the sealing pipe restricts fluid input from the other of the first fluid inlet and the second fluid inlet to the negative pressure chamber; The second inlet pipe is idle, the first inlet pipe is connected to one of the first fluid inlet and the second fluid inlet, and the sealing pipe restricts fluid input from the other of the first fluid inlet and the second fluid inlet to the negative pressure chamber.

20. The conversion device according to claim 19, characterized in that, The sealing tube is provided with a connecting groove, which can connect to the air passage of the hollow body; The connection length between the first liquid inlet pipe and the hollow body is different from the connection length between the second liquid inlet pipe and the hollow body. The connection length of one of the first liquid inlet pipe and the second liquid inlet pipe to the hollow body extends beyond the connection groove along the length direction of the sealing pipe to seal the air passage; The connection length of the other of the first and second inlet pipes to the hollow body is less than the position of the connecting groove along the length direction of the sealing pipe, so as to open the air passage.

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