Emulsifying equipment and beverage machine

Abstract

The invention discloses emulsifying equipment and a beverage machine, the emulsifying equipment comprises a venturi structure, the venturi structure comprises at least one mixing cavity, the at least one mixing cavity is communicated with a corresponding steam channel, a liquid channel, an air channel and an outlet channel, and the outlet channel is connected to a single output pipe; the outlet channel is used for outputting the mixed fluid generated by the at least one mixing cavity based on the Venturi effect; the emulsifying equipment comprises a first milk foam gear for outputting cold milk products from a single output pipe and a second milk foam gear for outputting hot milk products from a single output pipe; the cross-sectional area of the minimum liquid passing port from the liquid channel to the at least one mixing cavity in the first milk foam gear is larger than the cross-sectional area of the minimum liquid passing port from the liquid channel to the at least one mixing cavity in the second milk foam gear; the emulsifying equipment comprises a conversion device and an operation part, and the conversion device switches the first milk foam gear or the second milk foam gear based on selection of the operation part.

Description

Technical Field

[0001] The present invention relates to the technical field of beverage preparation, and particularly to an emulsifying device and a beverage machine. Background Art

[0002] Existing beverage machines can make a variety of beverages. Many beverages use milk foam during production. Milk foam refers to the foam made from milk. For example, it can be blended with coffee to form a fancy coffee that is both beautiful and delicious, and is gradually sought after by many coffee lovers. Making milk foam is generally achieved through a milk frother, which is used in conjunction with a beverage machine.

[0003] For existing milk frothers used in conjunction with coffee machines, the principle is generally that steam enters the foaming chamber from the steam channel, creating a negative pressure in the foaming chamber, driving milk to flow into the foaming chamber, and air is sucked into the foaming chamber through the air channel. The air mixes with the milk in the foaming chamber to form milk foam, and the milk foam finally flows out from the milk outlet at the lower part of the foaming chamber.

[0004] However, existing milk frothers can only make milk foam of a single flavor and cannot meet the user's demand for more flavors. Summary of the Invention

[0005] The purpose of the present invention is to provide an emulsifying device that can meet the user's needs.

[0006] The purpose of the present invention is to provide a beverage machine that can meet the user's needs.

[0007] To achieve the above-mentioned invention purposes, the present invention provides an emulsifying device, including a Venturi structure and a single output pipe connected to the Venturi structure. The Venturi structure includes:

[0008] At least one mixing chamber, the at least one mixing chamber is connected to a corresponding steam channel, liquid channel, air channel, and outlet channel, and the outlet channel is connected to the single output pipe;

[0009] The steam channel is used to connect to a steam source, the liquid channel is used to connect to a liquid storage source, the air channel is used to connect to air, and the outlet channel is used to output the mixed fluid generated by the at least one mixing chamber based on the Venturi effect;

[0010] The emulsifying device includes a first milk foam gear for outputting cold dairy products and a second milk foam gear for outputting hot dairy products from the single output pipe. In the first milk foam gear, the cross-sectional area of the minimum liquid passage opening from the liquid channel to the at least one mixing chamber is larger than the cross-sectional area of the minimum liquid passage opening from the liquid channel to the at least one mixing chamber in the second milk foam gear;

[0011] The emulsifying device includes a conversion device and an operation part. The conversion device switches between a first milk foam gear and a second milk foam gear based on the selection of the operation part.

[0012] Based on the selection of the operation part by the conversion device, the liquid supply amount is different in different milk foam gears, and milk foam with different temperatures can be output, which is more convenient to use and meets the needs of different users for more flavors.

[0013] As a further improvement of an embodiment of the present invention, the cross-sectional area of the minimum air passage opening from the air passage to the at least one mixing chamber in the first milk foam gear is greater than or equal to the cross-sectional area of the minimum air passage opening from the air passage to the at least one mixing chamber in the second milk foam gear. The conversion device operably adjusts the cross-sectional area of the minimum air passage opening, and the adjustment of the cross-sectional area of the minimum air passage opening is based on a preset corresponding relationship, and the preset corresponding relationship is defined as the proportional relationship between the cross-sectional area of the minimum liquid passage opening and the cross-sectional area of the minimum air passage opening.

[0014] The conversion device can simultaneously adjust the liquid supply amount of the liquid passage and the air intake amount of the air passage. The air supply amount corresponds to the liquid supply amount of the respective liquid passages, and milk foam with different temperatures and ensured quality can be generated.

[0015] As a further improvement of an embodiment of the present invention, a single steam passage communicates with the at least one mixing chamber. The conversion device is inserted into the liquid passage and the air passage to respectively form a variable liquid flow part and a variable air flow part. The operation part is used to drive the conversion device to move to change the cross-sectional area of the minimum liquid passage opening of the liquid passage through the variable liquid flow part, and change the cross-sectional area of the minimum air passage opening of the air passage through the variable air flow part.

[0016] By driving the conversion device to move with one operation part, the liquid supply amount of the liquid passage and the air intake amount of the air passage can be adjusted simultaneously, which is more convenient for users.

[0017] As a further improvement of an embodiment of the present invention, the Venturi structure includes a hollow body forming the at least one mixing chamber. The conversion device includes a single conversion part connecting the liquid passage. The single conversion part extends into the air passage along the extension direction of the air passage. When the operation part drives the single conversion part to move relative to the hollow body, the cross-sectional area of the minimum air passage opening and the cross-sectional area of the minimum liquid passage opening are changed.

[0018] The single conversion part simultaneously adjusts the air intake amount and the liquid supply amount, the structure is simpler, and the connection between the single conversion part and the hollow body is more compact.

[0019] As a further improvement of an embodiment of the present invention, the Venturi structure includes a hollow body forming the at least one mixing chamber, the conversion device includes a first conversion member connecting the liquid channel and a second conversion member connecting the air channel, and the operation part drives the first conversion member and the second conversion member to move synchronously to change the cross-sectional area of the minimum air passage port and the cross-sectional area of the minimum liquid passage port.

[0020] By providing two conversion members to respectively change the liquid inflow volume of the liquid channel and the air inflow volume of the air channel, the air inflow volume can be selected while selecting the liquid inflow volume, or the liquid inflow volume can be selected while selecting the air inflow volume, so that the air inflow volume and the air inflow volume can be set in appropriate gears to make various different flavored beverages.

[0021] As a further improvement of an embodiment of the present invention, the at least one mixing chamber includes:

[0022] A first mixing chamber communicating with a corresponding first steam channel, a first liquid channel, and a first air channel;

[0023] A second mixing chamber communicating with a corresponding second steam channel, a second liquid channel, and a second air channel;

[0024] The first mixing chamber and the second mixing chamber both communicate with the outlet channel, and the outlet channel is used to output the mixed fluid generated by the first mixing chamber or the second mixing chamber based on the Venturi effect; the first liquid channel corresponds to the first milk foam gear, and the second liquid channel corresponds to the second milk foam gear;

[0025] The conversion device controls the steam flow to enter the first mixing chamber from the first steam channel or enter the second mixing chamber from the second steam channel.

[0026] By controlling the flow direction of the steam flow by the conversion device, the mixing chamber for fluid mixing is selected, that is, the first milk foam gear or the second milk foam gear is selected. The emulsifying device can output hot and cold milk foams with different temperature ranges, so that different flavored milk foams can be obtained to meet the needs of different users for more flavors.

[0027] As a further improvement of an embodiment of the present invention, the cross-sectional area of the minimum air passage opening from the first air passage to the first mixing chamber and the cross-sectional area of the minimum liquid passage opening from the first liquid passage to the first mixing chamber have a first preset corresponding relationship, and the cross-sectional area of the minimum air passage opening from the second air passage to the second mixing chamber and the cross-sectional area of the minimum liquid passage opening from the second liquid passage to the second mixing chamber have a second preset corresponding relationship; for the first preset corresponding relationship, the cross-sectional area of the minimum liquid passage opening from the first liquid passage to the first mixing chamber is greater than or equal to a first preset value, and the cross-sectional area of the minimum air passage opening from the first air passage to the first mixing chamber is within a first set range; for the second preset corresponding relationship, the cross-sectional area of the minimum liquid passage opening from the second liquid passage to the second mixing chamber is less than or equal to a second preset value, and the cross-sectional area of the minimum air passage opening from the second air passage to the second mixing chamber is within a second set range; the first preset value is more than three times the second preset value, and the first set range and the second set range partially overlap.

[0028] Based on the first preset corresponding relationship or the second preset corresponding relationship, the mixing ratio of the liquid and the air is determined. The liquid supply amounts of the two liquid passages are different, and the air supply amount corresponds to the liquid supply amount of its respective liquid passage, ensuring that the temperature and quality of the generated hot and cold milk foam can meet the requirements of the user.

[0029] As a further improvement of an embodiment of the present invention, the emulsifying device obtains a steam flow by connecting to a beverage machine. The conversion device includes a control valve, the control valve is arranged on the beverage machine, the beverage machine is provided with a first steam interface and a second steam interface connected to the control valve, the first steam passage communicates with the first steam interface, the second steam passage communicates with the second steam interface, and the operation part is configured as an operation key or an operation panel of the beverage machine.

[0030] By one-key operation on the beverage machine, the flow direction of the steam flow can be selected to generate milk foam with different temperatures and ensure quality.

[0031] As a further improvement of an embodiment of the present invention, the Venturi structure includes a main body part and a pipe connector. The pipe connector includes a connecting channel, the main body part extends into the connecting channel, the outlet channel is arranged on the pipe connector, and a locking part is arranged between the main body part and the pipe connector. The locking part can be operably moved between two positions to allow and restrict the separation of the main body part from the pipe connector along the extending direction of the connecting channel.

[0032] By setting the locking part, when connecting the milk can to the steam interface on the beverage machine, it can prevent the separation of the main body part from the pipe connector during the process of the steam flow jet forming pressure, ensuring that the use of the milk can is safer and more reliable.

[0033] As a further improvement of an embodiment of the present invention, the Venturi structure includes a hollow body forming the at least one mixing chamber, the conversion device includes a first conversion member connecting the liquid passage, the first conversion member moves relative to the hollow body to change the cross-sectional area of the minimum liquid passage opening of the liquid passage, the emulsifying device further includes a second conversion member connecting the air passage, the second conversion member is connected to an air intake amount adjusting portion, the second conversion member moves relative to the hollow body to change the cross-sectional area of the minimum air passage opening of the air passage, the operation portion drives the first conversion member to move between a first milk foam gear and a second milk foam gear, and the air intake amount adjusting portion drives the second conversion member to move within the indication ranges corresponding to the first milk foam gear and the second milk foam gear.

[0034] By providing two conversion members to respectively change the liquid intake amount of the liquid passage and the air intake amount of the air passage, the user can independently select different combinations of air intake amounts and liquid intake amounts, and can set the air intake amount and the liquid intake amount at gears that the user likes or deems appropriate to make various beverages with different flavors.

[0035] The present invention also provides a beverage machine, which includes the emulsifying device according to any one of the above embodiments, and the steam passage of the emulsifying device is communicated with the beverage machine. Description of the Drawings

[0036] Figure 1 is a perspective schematic view of the emulsifying device according to the first embodiment of the present invention.

[0037] Figure 2 is Figure 1 an exploded schematic view of the cover assembly of the emulsifying device in

[0038] Figure 3 is Figure 2 a perspective schematic view of some components of the emulsifying device in

[0039] Figure 4 is Figure 1 the front view of the emulsifying device in

[0040] Figure 5 is Figure 4 a sectional view of the emulsifying device along line A-A in

[0041] Figure 6 is Figure 4 a sectional view of the emulsifying device along line B-B in

[0042] Figure 7 is a schematic view of the emulsifying device according to the second embodiment of the present invention.

[0043] Figure 8Yes Figure 7 Exploded view of the air intake part of the emulsifying device in

[0044] Figure 9 Is a three-dimensional schematic diagram of the emulsifying device according to the third embodiment of the present invention.

[0045] Figure 10 Yes Figure 9 Exploded view of the cover assembly of the emulsifying device in

[0046] Figure 11 Yes Figure 10 Three-dimensional assembly schematic diagram of some components of the emulsifying device in

[0047] Figure 12 Yes Figure 11 Exploded view between the second conversion part and the seal of the emulsifying device in

[0048] Figure 13 Yes Figure 9 Cross-sectional view of the emulsifying device along line C-C in

[0049] Figure 14 Yes Figure 9 Cross-sectional view of the emulsifying device along line D-D in

[0050] Figure 15 Is a three-dimensional schematic diagram of the emulsifying device according to the fourth embodiment of the present invention.

[0051] Figure 16 Yes Figure 15 Exploded view of the emulsifying device in

[0052] Figure 17 Yes Figure 16 Three-dimensional assembly schematic diagram of some components of the emulsifying device in

[0053] Figure 18 Yes Figure 15 Cross-sectional view of the emulsifying device along line E-E in

[0054] Figure 19 Yes Figure 18 Enlarged view of part a of the emulsifying device in

[0055] Figure 20 Yes Figure 19 Schematic diagram of the second conversion part of the emulsifying device cooperating with the matrix to form an air gap in

[0056] Figure 21 Yes Figure 19 Three-dimensional schematic diagram of the second conversion part of the emulsifying device.

[0057] Figure 22 Yes Figure 15Schematic cross-sectional view of the emulsifying device along line F-F.

[0058] Figure 23 Is a three-dimensional schematic diagram of the emulsifying device according to the fifth embodiment of the present invention.

[0059] Figure 24 Is Figure 23 Exploded schematic diagram of the emulsifying device in

[0060] Figure 25 Is Figure 23 Three-dimensional assembly schematic diagram of some components of the emulsifying device in

[0061] Figure 26 Is Figure 23 Schematic cross-sectional view of the emulsifying device along line G-G in

[0062] Figure 27 Is Figure 23 Schematic cross-sectional view of the emulsifying device along line H-H in

[0063] Figure 28 Is a three-dimensional schematic diagram of the emulsifying device according to the sixth embodiment of the present invention.

[0064] Figure 29 Is Figure 28 Exploded schematic diagram of the emulsifying device in

[0065] Figure 30 Is Figure 28 Schematic cross-sectional view of the emulsifying device along line I-I in

[0066] Figure 31 Is Figure 28 Schematic cross-sectional view of the emulsifying device along line J-J in

[0067] Figure 32 Is Figure 28 Exploded schematic diagram of the air intake part of the emulsifying device in

[0068] Figure 33 Is Figure 28 Schematic diagram of the structure of the locking member provided in the emulsifying device in

[0069] Figure 34 Is a three-dimensional schematic diagram of the emulsifying device according to the seventh embodiment of the present invention.

[0070] Figure 35 Is Figure 34 Exploded schematic diagram of the emulsifying device in

[0071] Figure 36 Is Figure 34 Schematic cross-sectional view of the emulsifying device along line K-K in

[0072] Figure 37 It is a schematic diagram of the emulsifying device according to the eighth embodiment of the present invention.

[0073] Figure 38 It is a schematic diagram of the emulsifying device according to the ninth embodiment of the present invention.

[0074] Figure 39 It is Figure 38 A schematic cross-sectional view of the emulsifying device in along line L-L.

[0075] Figure 40 It is Figure 39 A schematic diagram of another conversion device provided in the emulsifying device in .

[0076] Figure 41 It is a schematic diagram of the emulsifying device according to the tenth embodiment of the present invention.

[0077] Figure 42 It is Figure 41 A disassembled schematic diagram of the emulsifying device in .

[0078] Figure 43 It is Figure 41 The front view of the emulsifying device in .

[0079] Figure 44 It is Figure 43 A schematic cross-sectional view of the emulsifying device in along line M-M.

[0080] Figure 45 It is Figure 41 An assembly schematic diagram of some components of the emulsifying device in .

[0081] Figure 46 It is Figure 43 A schematic cross-sectional view of the emulsifying device in along line N-N.

[0082] Figure 47 It is Figure 43 A schematic cross-sectional view of the emulsifying device in along line O-O. Detailed Embodiments

[0083] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included within the protection scope of the present invention.

[0084] It should be understood that terms indicating relative spatial positions such as "upper", "above", "lower", "below", etc. used herein are for the purpose of facilitating description of the relationship of one unit or feature to another unit or feature as shown in the accompanying drawings. The terms of relative spatial positions may be intended to include different orientations of the device in use or operation other than the orientation shown in the figures.

[0085] The emulsifying device in the specific implementation manner of the present invention will be described by taking the emulsifying device used in combination with a beverage machine as an example. Refer to Figures 1 to 6 As shown, in this embodiment, the emulsifying device 100 includes a Venturi structure and a single output pipe 26 connected to the Venturi structure. The Venturi structure is defined as a structure that can generate the Venturi effect. The Venturi structure includes a hollow body 20, and the hollow body 20 defines at least one mixing chamber 21. The mixing chamber 21 communicates with a corresponding steam channel 22, a liquid channel 23, an air channel 24, and an outlet channel 25, and the outlet channel 25 is connected to the single output pipe 26. The steam channel 22 is used to communicate with a steam source, the liquid channel 23 is used to communicate with a liquid storage source, the air channel 24 is used to communicate with air, and the outlet channel 25 is used to output the mixed fluid generated in the mixing chamber 21 based on the Venturi effect.

[0086] Among them, the steam channel 22 is defined as the channel between the steam joint communicating with the steam source and the mixing chamber 21, the liquid channel 23 is defined as the channel from the liquid storage source to the mixing chamber 21, the air channel 24 is defined as the channel from the external air to the mixing chamber 21, and the outlet channel 25 is defined as the channel flowing from the mixing chamber 21 to the single output pipe 26 and then flowing to the user's beverage cup through the single output pipe 26. The hollow body 20 constitutes a Venturi tube. When steam is ejected, under the Venturi effect, a negative pressure is generated in the mixing chamber 21. Under the action of the negative pressure, the liquid storage source (such as milk) will be sucked into the mixing chamber 21 to be mixed with the steam, so as to obtain milk with a certain temperature rise; or the liquid storage source (such as milk) and air will be sucked into the mixing chamber 21 to be mixed with the steam and air together. During this process, the steam, milk, and air are fully and evenly mixed, so that fine milk foam can be formed and discharged from the outlet channel 25.

[0087] The hollow body 20 is connected to a steam nozzle 28. The steam nozzle 28 is hermetically connected to the hollow body 20 through a sealing ring. The steam nozzle 28 is adapted to the contraction part 213 of the Venturi tube through a conical nozzle head, so that the steam flow will form a vacuum in the mixing chamber 21 of the Venturi tube after passing through the steam nozzle 28. The vacuum can ensure that air and milk are effectively sucked into the mixing chamber 21. The mixing chamber 21 includes an upstream mixing chamber 211, and the contraction part 213 is arranged at the end of the upstream mixing chamber 211. When steam is ejected, a local vacuum is generated in the upstream mixing chamber 211. Under the action of the negative pressure, the milk of the liquid storage source will be sucked in to be mixed with the steam and air together.

[0088] Preferably, the mixing chamber 21 may include an upstream mixing chamber 211 and a downstream mixing chamber 212 arranged in sequence along the direction of fluid input to output. The milk foam after foaming in the upstream mixing chamber 211 enters the downstream mixing chamber 212 under inertia and the subsequent steam propulsion. In the downstream mixing chamber 212, the steam, milk, and air are further mixed to obtain a sufficient, uniform, and firm milk foam, and the foaming degree also increases accordingly. The formed milk foam will be discharged from the outlet channel 25 and output to the user's beverage cup through a single output pipe 26.

[0089] The emulsifying device 100 includes a first milk foam gear for outputting cold dairy products and a second milk foam gear for outputting hot dairy products from a single output pipe 26. The cross-sectional area of the minimum liquid passage opening from the liquid passage 23 to at least one mixing chamber 21 in the first milk foam gear is larger than that in the second milk foam gear. The emulsifying device 100 further includes a conversion device connecting the liquid passage 23 and the air passage 24 and an operation unit 50. The conversion device switches between the first milk foam gear and the second milk foam gear based on the selection of the operation unit 50. Through the one-key operation selection of the operation unit 50, the liquid supply amount is changed to generate milk foam with different temperatures and ensure quality. Among them, the cold dairy product can be cold milk foam with a temperature in the range of 10°C to 30°C, and the hot dairy product can be hot milk foam with a temperature in the range of 40°C to 70°C. The emulsifying device can realize the output of cold and hot milk foam to meet the needs of different users for more flavors.

[0090] Furthermore, the cross-sectional area of the minimum air passage opening from the air passage 24 to at least one mixing chamber 21 in the first milk foam gear is greater than or equal to that in the second milk foam gear. The conversion device operably adjusts the cross-sectional area of the minimum air passage opening, and the adjustment of the cross-sectional area of the minimum air passage opening is based on a preset corresponding relationship, which is defined as the proportional relationship between the cross-sectional area of the minimum liquid passage opening and the cross-sectional area of the minimum air passage opening. By changing the liquid supply amount and the air intake amount simultaneously through the conversion device, the quality of cold and hot milk foam can be better obtained.

[0091] Specifically, in the first milk foam gear, the cross-sectional area of the minimum liquid passage opening is greater than or equal to a first preset value. As the cross-sectional area of the minimum air passage opening increases, the temperature of the output milk foam decreases. In the second milk foam gear, the cross-sectional area of the minimum liquid passage opening is less than or equal to a second preset value. As the cross-sectional area of the minimum air passage opening increases, the temperature of the output milk foam increases, where the first preset value is more than twice, preferably more than three times, the second preset value. According to this proportional relationship, the appropriate cross-sectional area of the minimum air passage opening can be selected based on the temperature of the milk foam to be output. By setting the corresponding relationship between the liquid supply amount and the gas supply amount, milk foam outputs with different cold and hot temperatures can be obtained, and the quality of the output milk foam is stable.

[0092] In this embodiment, a single steam channel 22 communicates with the mixing chamber 21. The conversion device is inserted into the liquid channel 23 and the air channel 24 to form a variable liquid flow portion and a variable air flow portion respectively. The operating portion 50 is used to drive the conversion device to move so as to change the cross-sectional area of the minimum liquid passage opening of the liquid channel 23 through the variable liquid flow portion, and change the cross-sectional area of the minimum air passage opening of the air channel 24 through the variable air flow portion, thereby changing the cross-sectional area of the minimum liquid passage opening of the liquid channel 23 and changing the cross-sectional area of the minimum air passage opening of the air channel 24. By driving the conversion device to move with one operating portion 50, the liquid inflow rate of the liquid channel 23 and the air inflow rate of the air channel 24 can be adjusted simultaneously, which is more convenient for users.

[0093] Among them, the variable liquid flow portion is defined as the structural part where the liquid inflow rate can be changed, and the variable air flow portion is defined as the structural part where the air inflow rate can be changed. In this embodiment, the variable air flow portion and the variable liquid flow portion are arranged at intervals. Air enters the mixing chamber 21 together with the liquid in the liquid channel 23. The variable air flow portion and the variable liquid flow portion are arranged at intervals through the air groove 513. The air groove 513 communicates with the liquid channel 23. After the air passes through the variable air flow portion and the air groove 513 in sequence, it enters the mixing chamber 21 together with the liquid in the liquid channel 23, that is, the variable air flow portion is arranged upstream of the air groove 513, and the variable air flow portion is indirectly communicated with the variable liquid flow portion. The variable air flow portion and the variable liquid flow portion are arranged at intervals, so that the air inflow rate and the liquid inflow rate can be set more flexibly, and the control of the magnitudes of the air inflow rate and the liquid inflow rate is more accurate. In addition, air and liquid can enter the mixing chamber 21 through the same inlet, and air and liquid can be premixed before entering the mixing chamber 21 to further improve the foaming effect in the mixing chamber 21.

[0094] In this embodiment, the conversion device includes a conversion member 51 arranged between the liquid channel 23 and the mixing chamber 21. The conversion member 51 is provided with a first communication flow channel 231 and a second communication flow channel 232. The cross-sectional areas of the first communication flow channel 231 and the second communication flow channel 232 are different. The first communication flow channel 231 and the second communication flow channel 232 are configured as variable liquid flow portions. In the first milk foam gear, the first communication flow channel 231 communicates with the mixing chamber 21; in the second milk foam gear, the second communication flow channel 232 communicates with the mixing chamber 21. By switching one of the first communication flow channel 231 and the second communication flow channel 232 to communicate with the mixing chamber 21, different milk foam gears can be selected. By setting two communication flow channels with different fixed cross-sectional areas, the liquid inflow rate can be controlled more accurately to adapt to the liquid inflow rates required for two different milk foam qualities / temperatures. Of course, more communication flow channels can also be set to provide more choices for users. Two or more than two communication flow rates constitute a stepped adjustment of the liquid inflow rate, making it more convenient for users to operate.

[0095] Specifically, both the first connecting flow channel 231 and the second connecting flow channel 232 have an upstream opening 234 and a downstream opening 235, and at least one of the upstream opening 234 and the downstream opening 235 is connected to the air groove 513. Air enters the mixing chamber 21 from the air groove 513 along with the liquid in the first connecting flow channel 231 or the second connecting flow channel 232. Preferably, air grooves 513 are provided at both the upstream opening 234 and the downstream opening 235. The two air grooves 513 can achieve air intake simultaneously from the upstream opening 234 and the downstream opening 235, ensuring more reliable air intake.

[0096] In this embodiment, the conversion device includes a single conversion member 51 connecting the liquid channel 23. The single conversion member 51 extends into the air channel 24 along the extending direction of the air channel 24. When the single conversion member 51 moves relative to the hollow body 20, it changes the cross-sectional area of the minimum air passage opening of the air channel 24 and the cross-sectional area of the minimum liquid passage opening of the liquid channel 23. The cross-sectional area of the minimum liquid passage opening of the liquid channel 23 and the cross-sectional area of the minimum air passage opening of the air channel 24 have a preset corresponding relationship. The single conversion member 51 adjusts the air intake volume and the liquid intake volume simultaneously, with a simpler structure and a more compact connection between the single conversion member 51 and the hollow body 20.

[0097] Under the preset corresponding relationship, as the operating part 50 adjusts and moves in one direction, the changes in the air supply volume and the liquid supply volume cause the temperature of the output milk foam to increase; when the operating part 50 adjusts and moves in the opposite direction, the changes in the air supply volume and the liquid supply volume cause the temperature of the output milk foam to decrease.

[0098] Among them, the first connecting flow channel 231 and the second connecting flow channel 232 are provided on the single conversion member 51. Of course, the single conversion member 51 can also be provided with more connecting flow channels with different cross-sectional areas. These multiple connecting flow channels are configured as variable liquid flow parts. The single conversion member 51 drives one of the connecting flow channels to be connected to the liquid channel 23 to change the cross-sectional area of the minimum liquid passage opening of the liquid channel 23. The connecting flow channels are directly provided on the single conversion member 51, which is convenient for the connection between the single conversion member 51 and the hollow body 20, simple for installation and disassembly, and convenient for cleaning.

[0099] The single conversion member 51 is configured as a cylindrical shape. The single conversion member 51 extends from the air channel 24 into the liquid channel 23. The first connecting flow channel 231 and the second connecting flow channel 232 are arranged at intervals along the circumferential direction and penetrate the single conversion member 51 in the radial direction. The single conversion member 51 rotates relative to the hollow body 20 to select the connecting flow channel connected to the liquid channel 23. The single conversion member 51 switches different connecting flow channels by rotating, ensuring the seal between the single conversion member 51 and the liquid channel 23 and making the liquid intake adjustment more convenient.

[0100] Furthermore, the emulsifying device 100 further includes a seal 244 at least partially extending into the air passage 24. The seal 244 is sleeved around the periphery of a single conversion member 51. A longitudinally extending variable cross-section air intake groove 511 is provided on one of the inner wall of the seal 244 and the outer wall of the single conversion member 51, and a sealing rib 245 is provided on the other of the inner wall of the seal 244 and the outer wall of the single conversion member 51. The mating portion of the sealing rib 245 and the variable cross-section air intake groove 511 constitutes an airflow variable portion. The cooperation of the variable cross-section air intake groove 511 and the sealing rib 245 realizes stepless adjustment of the air intake volume. In other implementable ways, it can also be that the liquid intake volume is steplessly adjusted while the air intake volume is stepwise adjusted. Among them, the setting of the sealing rib 245 enables the cross-sectional area of the variable cross-section air intake groove 511 to change in the same way when the single conversion member 51 rotates in two opposite directions from a preset position, and it can be switched to another gear along two directions, facilitating the user to select a gear.

[0101] A communication groove is provided between the variable cross-section air intake groove 511 and the two communication channels. The communication groove includes an annular groove 512 and air grooves 513 respectively communicating with the two communication channels one by one. The air grooves 513 can be two, or three or four. The annular groove 512 extends along the circumferential direction of the single conversion member 51 and axially communicates with the variable cross-section air intake groove 511 and the multiple air grooves 513 respectively. When multiple communication channels are provided, the annular groove 512 communicates with the multiple communication channels through the corresponding air grooves 513. Only one variable cross-section air intake groove 511 needs to be provided, and at different milk foam temperature gears, the mixing chamber 21 can be supplied with air through the corresponding communication channels, simplifying the air intake structure and having good air intake volume consistency.

[0102] In this embodiment, the emulsifying device 100 is configured as a milk can. The milk can includes a can body 11 and a cover assembly 12 covering the upper part of the can body 11. The can body 11 has a liquid storage cavity for containing liquid, and the hollow body 20 is arranged in the cover assembly 12; an installation opening 123 is provided on the outside of the cover assembly 12, and the conversion device passes through the installation opening 123 and is connected to the operation part 50. The operation part 50 is configured as a knob, and the knob drives the conversion device to move so as to simultaneously change the cross-sectional area of the minimum liquid passage opening of the liquid passage 23 and the cross-sectional area of the minimum air passage opening of the air passage 24. For the convenience of manufacturing the hollow body 20, the air passage 24 is arranged in the vertical direction, where the vertical direction is defined as the direction perpendicular to the horizontal direction of the table when the milk can is placed on the table. A part of the liquid passage 23 is horizontally arranged, and the tube walls of this part of the liquid passage 23 and the air passage 24 are integrally formed with the hollow body 20. Another part of the liquid passage 23 is formed in the L-shaped milk supply pipe 113, and the milk supply pipe 113 is detachably connected to the hollow body 20 for easy cleaning. The single conversion member 51 can extend into the horizontal liquid passage 23 in the vertical direction and simultaneously change the liquid intake volume and the air intake volume by rotation.

[0103] Referring to Figure 7 and Figure 8 As shown, the emulsifying device 200 of the second preferred embodiment of the present invention is different from the first embodiment in that the variable cross-section air inlet groove 511a is configured as a stepped groove, and the number of steps of the stepped groove is the same as and corresponds one-to-one to the number of communication channels. The sealing rib 245a is also configured in a stepped shape, and is a stepped sealing rib corresponding to the stepped groove along the circumferential direction of the inner wall of the seal 244. The liquid inlet volume and the air inlet volume are both set for step adjustment, and the air inlet and liquid inlet controls are more accurate, and the consistency of the beverage is good.

[0104] Referring to Figures 9 to 14 As shown, the emulsifying device 300 of the third preferred embodiment of the present invention has components with the same reference numerals as those in the first embodiment, and their structures and functions are similar, so they will not be described in detail here.

[0105] The emulsifying device 300 includes a conversion device. The conversion device includes a first conversion member 52 connected to the liquid channel and a second conversion member 53 connected to the air channel. The operation part 50a drives the first conversion member 52 and the second conversion member 53 to move synchronously to change the cross-sectional area of the minimum air passage opening of the air channel 24 and the cross-sectional area of the minimum liquid passage opening of the liquid channel 23, that is, the first conversion member 52 moves relative to the hollow body 20a to change the cross-sectional area of the minimum liquid passage opening of the liquid channel 23, and the second conversion member 53 moves relative to the hollow body 20a to change the cross-sectional area of the minimum air passage opening of the air channel 24. By providing two conversion members to separately change the liquid inlet volume of the liquid channel 23 and the air inlet volume of the air channel 24, the air inlet volume can be selected while selecting the liquid inlet volume, or the liquid inlet volume can be selected while selecting the air inlet volume, so that the air inlet volume and the air inlet volume can be set in appropriate gears to make various beverages with different flavors. Among them, the cross-sectional area of the minimum liquid passage opening of the liquid channel 23 and the cross-sectional area of the minimum air passage opening of the air channel 24 have a preset corresponding relationship, and this preset corresponding relationship is the same as that in the above embodiment.

[0106] Among them, the liquid channel 23 and the air channel 24 communicate with different positions of the mixing chamber 21, that is, the liquid and the gas enter the mixing chamber 21 in their respective independent manners, and the interval between the variable air flow part and the variable liquid flow part is realized in this way. For example, the liquid channel 23 communicates with the liquid inlet of the mixing chamber 21 and the air channel 24 communicates with the air inlet of the mixing chamber 21 at an interval, which can be arranged at an interval along the circumferential direction of the hollow body 20a, or can be arranged at an interval along the axial direction of the hollow body 20a.

[0107] In this embodiment, the operating part 50a is in driving connection with the second conversion part 53, and the second conversion part 53 is in driving connection with the first conversion part 52, so as to realize the synchronous movement of the first conversion part 52 and the second conversion part 53, so as to adjust the liquid intake and air intake simultaneously. By means of an operating part 50a, the synchronous movement of the first conversion part 52 and the second conversion part 53 is realized, so that the liquid intake of the liquid passage 23 and the air intake of the air passage 24 can be adjusted simultaneously, which is more convenient for users. By operating the operating part 50a, not only the air supply amount can be changed, but also the liquid supply amount can be changed synchronously. When the air supply amount and the liquid supply amount are changed simultaneously, milk foams with different temperatures and ensured quality can be generated, realizing the output of hot and cold milk foams and meeting the needs of different users for more flavors.

[0108] Among them, the second conversion part 53 is configured as a driving part, and the first conversion part 52 is configured as a driven part, which is more convenient for structural connection. In other implementable solutions, it is also possible that the operating part 50a is in driving connection with the first conversion part 52, and the first conversion part 52 is in driving connection with the second conversion part 53, that is, the operating part 50a directly drives the first conversion part 52, and the operating part 50a indirectly drives the second conversion part 53 through the first conversion part 52. In other embodiments, it is also possible to directly drive the first conversion part 52 and the second conversion part 53 by the operating part 50a. For example, the operating part 50a drives the first conversion part 52 to rotate and the second conversion part 53 to rotate simultaneously through gears, or the operating part 50a drives the first conversion part 52 to rotate and the second conversion part 53 to move simultaneously. It is also possible that there is no direct driving relationship between the first conversion part 52 and the second conversion part 53, and the operating part 50a drives one of the first conversion part 52 and the second conversion part 53 to rotate and drives the other to move.

[0109] Specifically, the second conversion part 53 extends into the air passage 24 along the extending direction of the air passage 24, and the second conversion part 53 rotates around the central axis of the air passage 24 to drive the first conversion part 52 to linearly move along the extending direction of the air passage 24. By the rotation of the second conversion part 53 extending into the air passage 24 to drive the first conversion part 52 to move, when different flavors of milk foams are selected for output by operating the operating part 50a, the movement of the first conversion part 52 and the second conversion part 53 is more reliable, and the adjustment of the operating part 50a is smoother.

[0110] A first opening 233 is provided on the liquid passage 23, the first conversion part 52 is inserted into the liquid passage 23 from the first opening 233, the air passage 24 has a second opening 243, the second conversion part 53 extends into the air passage 24 from the second opening 243, and the first opening 233 and the second opening 243 face the same direction. By providing the first opening 233 and the second opening 243 facing the same direction, the installation of the first conversion part 52 and the second conversion part 53 is more convenient.

[0111] Among them, a through port 236 for cooperating with the first conversion member 52 is provided in the liquid passage 23. The first conversion member 52 changes the cross-sectional area of the minimum liquid through port of the liquid passage 23 by adjusting the fluid through area of the through port 236. The mating portion of the first conversion member 52 and the through port is configured as a liquid flow variable portion. By changing the liquid inflow amount of the liquid passage 23 in a stepless adjustment manner, more choices can be provided to the user.

[0112] A cylindrical seal 244a is provided in the air passage 24. A through hole is provided at the bottom of the seal 244a. A longitudinally extending variable cross-section air intake groove 511a is provided on the outer wall of the second conversion member 53. A sealing rib 245a is provided on the inner wall of the seal 244a. The variable cross-section air intake groove 511a communicates with the air passage 24 through the through hole. The sealing rib 245a cooperates with the variable cross-section air intake groove 511a to change the air intake amount of the air passage 24. The mating portion of the sealing rib 245a and the variable cross-section air intake groove 511a constitutes an air flow variable portion. The sealing rib 245a extends along both the circumferential and axial directions of the seal 244a. Thus, when the first conversion member 52 rotates relative to the seal 244a, the position where the variable cross-section air intake groove 511a cooperates with the sealing rib 245a is different, and the cross-sectional area of the air intake groove changes, realizing the adjustment of the air intake amount. Among them, when the second conversion member 53 rotates in two opposite directions from a preset position, the change in the cross-sectional area of the air intake groove is the same, and it can be switched to another gear along two directions, facilitating the user to select gears.

[0113] In this embodiment, the operation portion 50a is configured as a knob. The knob is integrally provided with or fixedly connected to the second conversion member 53. A guide post 531 is provided on the second conversion member 53. The first conversion member 52 includes a cam groove 521. The guide post 531 is inserted into the cam groove 521. While the knob drives the second conversion member 53 to rotate, the cam groove 521 drives the first conversion member 52 to move linearly under the guidance of the guide post 531. Specifically, the first conversion member 52 includes a switching rod 522 and a guide rod 523 arranged at intervals. The switching rod 522 extends into the liquid passage 23 from the first opening 233 and is used to adjust the fluid through area of the through port 236 to change the cross-sectional area of the minimum liquid through port of the liquid passage 23. The guide rod 523 extends into the guide cylinder 125 to guide the linear movement of the switching rod 522, making the movement of the switching rod 522 more reliable. The end of the first conversion member 52 extends into the liquid passage 23 and a flow-through groove 524 is provided on this end, that is, a flow-through groove 524 is provided on the end of the switching rod 522. The flow-through groove 524 is configured as a groove with a gradually changing cross-section. The linear movement of the first conversion member 52 can adjust the communication area between the flow-through groove 524 and the through port 236, thereby controlling the liquid supply amount. The flow-through groove 524 is configured as a gradually changing groove, which can achieve a larger range of adjustment with a shorter movement distance of the first conversion member 52. The overall structure is compact, avoiding structural instability caused by a long-distance movement, and thus making the operation more reliable.

[0114] The emulsifying device 200 is configured as a milk can, which includes a tank body 11 and a cover assembly 12 covering the upper part of the tank body 11. The tank body 11 has a liquid storage cavity for containing liquid, and a hollow body 20a is arranged in the cover assembly 12. An installation opening 123a for defining a second conversion member 53 is provided outside the cover assembly 12. The knob is connected to the second conversion member 53 through the installation opening 123a, and the second conversion member 53 is drivingly connected to the first conversion member 52 inside the cover assembly 12. Only by operating the knob on the milk can, the knob drives the second conversion member 53 to rotate and drives the first conversion member 52 to move linearly, and the synchronous movement of the two conversion members can be realized, which is convenient for adjusting the corresponding relationship between the air supply amount and the liquid supply amount. For example, as the liquid supply amount increases, the air supply amount increases synchronously. The knob can be adjusted corresponding to the gears, and the user only needs to select the corresponding gear to obtain a drink with a suitable temperature.

[0115] Refer to Figures 15 to 22 As shown, it is the preferred fourth embodiment of the present invention. The components with the same reference numerals as those in the third embodiment have similar structures and functions, and will not be described in detail here.

[0116] The emulsifying device 400 includes a conversion device. The conversion device includes a first conversion member 52b connected to the liquid channel 23 and a second conversion member 53b connected to the air channel 24b. The operation part 50b drives the first conversion member 52b and the second conversion member 53b to move synchronously to change the cross-sectional area of the minimum air passage opening of the air channel 24b and the cross-sectional area of the minimum liquid passage opening of the liquid channel 23, that is, the first conversion member 52b moves relative to the hollow body 20b to change the cross-sectional area of the minimum liquid passage opening of the liquid channel 23, and the second conversion member 53b moves relative to the hollow body 20b to change the cross-sectional area of the minimum air passage opening of the air channel 24b. By setting two conversion members to respectively change the liquid inlet amount of the liquid channel 23 and the air inlet amount of the air channel 24b, the air inlet amount can be selected while selecting the liquid inlet amount, or the liquid inlet amount can be selected while selecting the air inlet amount, so that the liquid inlet amount and the air inlet amount can be set at appropriate gears to make various drinks with different flavors. Among them, the cross-sectional area of the minimum liquid passage opening of the liquid channel 23 and the cross-sectional area of the minimum air passage opening of the air channel 24b have a preset corresponding relationship, and this preset corresponding relationship is the same as that in the above embodiment.

[0117] In this embodiment, the operating part 50b is drivingly connected to the second conversion part 53b, and the operating part 50b or the second conversion part 53b is drivingly connected to the first conversion part 52b. That is to say, by means of an operating part 50b, the first conversion part 52b and the second conversion part 53b are driven to move synchronously, so that the liquid inflow rate of the liquid channel 23 and the air intake rate of the air channel 24b can be adjusted simultaneously, which is more convenient for users. By operating the operating part, not only the air supply amount can be changed, but also the liquid supply amount can be changed synchronously. When the air supply amount and the liquid supply amount are changed simultaneously, milk foams with different temperatures and ensured quality can be generated, the output of cold and hot milk foams can be realized, and the needs of different users for more flavors can be met. For example, cold milk foam with a temperature in the range of 10°C to 30°C and hot milk foam with a temperature in the range of 40°C to 70°C.

[0118] Preferably, the operating part 50b and the second conversion part 53b are integrally provided or at least circumferentially fixedly connected. The operating part 50b drives the second conversion part 53b to rotate to change the cross-sectional area of the minimum air passage opening of the air channel 24b, and the operating part 50b or the second conversion part 53b drives the first conversion part 52b to move to change the cross-sectional area of the minimum liquid passage opening of the liquid channel 23. The cross-sectional area of the minimum liquid passage opening of the liquid channel 23 and the cross-sectional area of the minimum air passage opening of the air channel 24b have a preset corresponding relationship. The preset corresponding relationship is the same as that in the above embodiment.

[0119] Specifically, the air channel 24b includes a first section 241 and a second section 242 that are angled with each other. The first section 241 and the second section 242 are arranged along the air inflow direction. The second conversion part 53b extends into the air channel 24b along a direction perpendicular to the extension of the first section 241. The second conversion part 53b rotates relative to the air channel 24b, and the operating part 50b or the second conversion part 53b drives the first conversion part 52b to move linearly. By setting the air channel 24b as the first section 241 and the second section 242 that are angled with each other, the structure of the air channel 24b can be made more compact, which is convenient for connecting with the first conversion part 52b.

[0120] A first opening 233b is provided on the liquid passage 23, and the first conversion member 52b is inserted into the liquid passage 23 from the first opening 233b. A first section 241 of the air passage 24b is provided with a second opening 243b, and the second conversion member 53b is inserted into the air passage 24b from the second opening 243b. The first opening 233b and the second opening 243b face the same direction. By providing the first opening 233b and the second opening 243b facing the same direction, the installation of the first conversion member 52b and the second conversion member 53b is more convenient. By driving the first conversion member 52b to move through the rotation of the second conversion member 53b inserted into the air passage 24b, when different flavors of milk foam are selected through the operation unit 50b, the movement of the first conversion member 52b and the second conversion member 53b is more reliable, and the adjustment of the operation unit 50b is smoother.

[0121] Wherein, a through port 236b for cooperating with the first conversion member 52b is provided in the liquid passage 23. The first conversion member 52b changes the cross-sectional area of the minimum liquid passage opening of the liquid passage 23 by adjusting the fluid passage area of the through port 236b. The cooperation between the first conversion member 52b and the through port 236b is configured as a liquid flow variable part. By changing the liquid inlet volume of the liquid passage 23 in a stepless adjustment manner, more choices can be provided to the user.

[0122] In this embodiment, the operation unit 50b is configured as a knob. A cam groove 521b is provided on the outer circumference of the knob. A guide post 531b for inserting into the cam groove 521b is provided on the first conversion member 52b. While the knob drives the second conversion member 53b to rotate, the guide post 531b drives the first conversion member 52b to move linearly under the guidance of the cam groove 521b. The knob drives the second conversion member 53b to rotate and drives the first conversion member 52b to move linearly, which can realize the synchronous movement of the two conversion members and facilitate adjusting the corresponding relationship between the air supply volume and the liquid supply volume. For example, as the liquid supply volume increases, the air supply volume increases synchronously. The knob can be adjusted corresponding to the gears, and the user only needs to select the corresponding gear to obtain a beverage with a suitable temperature.

[0123] The emulsifying device 400 further includes a base body 54 that cooperates with the second conversion member 53b. An air gap 543 (see Figure 20 ) is formed between the second conversion member 53b and the base body 54. The air passage 24b establishes an air supply path to the mixing chamber 21 through the air gap 543. The second conversion member 53b is operably movable relative to the base body 54 to change the air supply volume from the air passage 24b to the mixing chamber 21 by adjusting the communication area of the air gap 543. The air gap 543 is configured as an air flow variable part.

[0124] By providing the second conversion member 53b and the base body 54 that cooperates with it, the communication area of the air gap 543 can be changed by operating the second conversion member 53b to move. The installation direction of the second conversion member 53b forms an angle with the extending direction of the corresponding air passage 24b. The cooperation accuracy between the second conversion member 53b and the base body 54 is high, so that the adjustment of the air supply amount is more accurate, the quality of the milk foam generated by the emulsifying device is stable, the product consistency is good, and milk foams with different fineness levels can be selected to meet the user's pursuit of coffee taste.

[0125] Referring to Figures 16 to 20 , a communication groove 541 extending through in the first direction is formed on the base body 54. A convex block 537 that fits the bottom of the communication groove 541 is provided on the second conversion member 53b. An air gap 543 is formed between the convex block 537 and the side wall of the communication groove 541. The second conversion member 53b rotates to drive the convex block 537, so that the distance between the outer peripheral surface of the convex block 537 and the side wall of the communication groove 541 changes. The air gap 543 is formed between the outer peripheral surface of the convex block 537 and the side wall surface of the communication groove 541, which can be more precise in terms of technology and convenient for manufacturing, and can reduce the manufacturing cost while better controlling the air supply amount.

[0126] Preferably in this embodiment, the convex block 537 has an elliptical outer peripheral surface or a cam-shaped outer peripheral surface. A raised portion 542 is provided at the bottom of the communication groove 541, and the convex block 537 fits on the raised portion 542. By providing the convex block 537 with an elliptical outer peripheral surface or a cam-shaped outer peripheral surface, the area of the air gap 543 can be regularly changed during the rotation of the convex block 537. The raised portion 542 at the bottom of the groove fits with the convex block 537, which can better seal the gap between the convex block 537 and the bottom of the groove, ensuring that air can only pass through the air gap 543 and guaranteeing the consistency of the air supply amount.

[0127] The first section 241 of the air passage 24b extends along the first direction, and the second section 242 extends along the second direction. The second conversion member 53b rotates relative to the base body 54 around an axis perpendicular to the first direction. The air passage 24b is composed of two angled sections, which can provide sufficient space for the arrangement of the second conversion member 53b and the base body 54, and the arrangement between the second conversion member 53b and the air passage 24b is more compact.

[0128] Continuing to refer to Figure 16, in this embodiment, the emulsifying device 400 is configured as a milk can, which includes a tank body 11 and a cover assembly 12 covering the upper part of the tank body 11. The tank body 11 has a liquid storage cavity for containing liquid, and the hollow body 20b is arranged in the cover assembly 12; a bracket 55 for supporting the first section 241 is arranged inside the cover assembly 12, and an operating part 50b for connecting the second conversion part 53b is arranged outside the cover assembly 12. An installation opening 123b corresponding to the position of the second opening 243b is arranged on the cover assembly 12. The operating part 50b is connected to the second conversion part 53b through the installation opening 123b. The operating part 50b or the second conversion part 53b is in transmission connection with the first conversion part 52b outside the cover assembly 12. A through hole for the first conversion part 52b to pass through can be arranged on the cover assembly 12. By directly operating the operating part 50b on the milk can to adjust the air supply amount, gear marks can be set around the operating part 50b for convenient adjustment. The hollow body 20b is arranged in the cover assembly 12, and the space of the cover assembly 12 can be utilized to make the overall structure of the milk can simple and compact. Among them, the cover assembly 12 includes an upper cover 121 and a lower cover 122. An accommodation space is defined between the upper cover 121 and the lower cover 122. The hollow body 20b is arranged in the accommodation space, and the air passage 24b is also arranged in the accommodation space to prevent foreign objects from entering the mixing cavity through the air passage.

[0129] The first section 241 of the air passage 24b can be supported on the bracket 55, and a fixing part 56 is connected to the bracket 55. The fixing part 56 presses the second conversion part 53b towards the base body 54. A hook 561 extends towards the bracket 55 on the fixing part 56, and a corresponding slot 551 is arranged on the bracket 55. The hook 561 is inserted into the corresponding slot 551 to connect the fixing part 56 to the bracket 55, and the second conversion part 53b is limited by the fixing part 56. Preferably, the operating part 50b is connected to the fixing part 56. Along the rotation axis of the second conversion part 53b, the operating part 50b is limited by the fixing part 56. The fixing part 56 axially clamps the operating part 50b and presses the second conversion part 53b through the operating part 50b, that is, the fixing part 56 restricts the second conversion part 53b from moving away from the base body 54 through the operating part 50b to ensure that the second conversion part 53b is in close contact with the bottom of the communication groove 541 on the base body 54.

[0130] In the above embodiment, the second conversion part can also be configured to include a plurality of air flow channels connected to the air passage. The cross-sectional areas of the plurality of air flow channels are different, and the plurality of air flow channels are configured as an air flow variable part. By switching one of the plurality of air flow channels to communicate with the mixing cavity, the intake air volume of the air passage can be changed. That is, the stepped adjustment of the intake air volume can be realized, which can make the intake air control more accurate, the quality of the milk foam generated by the emulsifying device stable, and the product consistency better.

[0131] By setting two conversion components to respectively change the liquid inflow volume of the liquid channel and the air inflow volume of the air channel, the user can independently select different combinations of air inflow volume and liquid inflow volume. The user can also select the air inflow volume while selecting the liquid inflow volume, or select the liquid inflow volume while selecting the air inflow volume, so that the air inflow volume and the liquid inflow volume can be set at appropriate gears to make various different flavors of beverages. In particular, the production of cold milk foam and hot milk foam can be achieved, thus meeting the needs of the user. In addition, the production of cold milk foam and hot milk foam is carried out by using the same emulsifying device. Only the corresponding operation part needs to be operated, and there is no need to replace components, which is convenient to use and has lower costs.

[0132] Referring to Figures 23 to 27 As shown, a fifth preferred embodiment of the present invention is provided. The emulsifying device 500 includes a Venturi structure. The Venturi structure includes a hollow body 20c. The hollow body 20c has a mixing chamber 21. The mixing chamber 21 communicates with a steam channel 22, a liquid channel 23, an air channel 24, and an outlet channel 25. The steam channel 22 is used to communicate with a steam source. The liquid channel 23 is used to communicate with a liquid storage source. The air channel 24 is used to communicate with air. The outlet channel 25 is used to output the mixed fluid generated in the mixing chamber based on the Venturi effect.

[0133] The conversion device of the emulsifying device 500 includes a first conversion component 52c connected to the liquid channel 23 and a second conversion component 53c connected to the air channel 24. The first conversion component 52c moves relative to the hollow body 20c to change the cross-sectional area of the minimum liquid passage opening of the liquid channel 23. The second conversion component 53c moves relative to the hollow body 20c to change the cross-sectional area of the minimum air passage opening of the air channel 24. By setting two conversion components to respectively change the liquid inflow volume of the liquid channel and the air inflow volume of the air channel, the user can independently select different combinations of air inflow volume and liquid inflow volume, and can set the air inflow volume and the liquid inflow volume at gears that the user likes or deems appropriate to make various different flavors of beverages. Such as cold milk foam with a temperature in the range of 10°C to 30°C and hot milk foam with a temperature in the range of 40°C to 70°C.

[0134] Specifically, the first conversion member 52c is connected to the operation part 50c, and the second conversion member 53c is connected to the air intake amount adjustment part 60. The operation part 50c drives the first conversion member 52c to move between the first milk foam gear and the second milk foam gear, and the air intake amount adjustment part 60 drives the second conversion member 53c to move within the indication range corresponding to each milk foam gear. In this embodiment, the cold and hot gears of the milk foam can be selected through the first conversion member 52c. Gear indications can be set around the operation part 50c. The operation part 50c drives the first conversion member 52c to select the cold milk foam gear or the hot milk foam gear, and the air intake amount adjustment part 60 drives the second conversion member 53c to select the fineness degree of the milk foam corresponding to the cold milk foam gear or the hot milk foam gear. The air intake amount adjustment part 60 drives the second conversion member 53c in a rotating manner. Gear indications can be set around the air intake amount adjustment part. For example, the rotation angle range of the air intake amount adjustment part is within 300 degrees, where 0 - 150 degrees is the range for adjusting the hot milk foam, and 150 - 300 degrees is the range for adjusting the cold milk foam. Additionally, a hot milk gear can be set, that is, the second conversion member 53c completely closes the air passage 24 connecting to the air inlet of the mixing chamber 21. By selecting the liquid intake amount and the air intake amount through different operating members, the fineness degree of the milk foam can be further selected when selecting milk foams of different temperatures, thus meeting more needs of users.

[0135] Preferably, the first conversion member 52c is provided with a first communication flow channel 231 and a second communication flow channel 232. The cross-sectional areas of the first communication flow channel 231 and the second communication flow channel 232 are different. The first conversion member 52c changes the liquid intake amount of the liquid channel 23 by switching the connection between the first communication flow channel 231 or the second communication flow channel 232 and the mixing chamber 21. That is to say, operating the first conversion member 52c can select two different liquid intake amounts, which is convenient for users to choose. A first opening 233c is provided on the liquid channel 23. The first conversion member 52c is inserted into the liquid channel 23 from the first opening 233c, and a liquid flow path from the liquid channel 23 to the mixing chamber 21 is established through the first communication flow channel 231 and the second communication flow channel 232. There is no need to control the liquid intake amount by replacing the milk tube or squeezing the milk tube. The fixed communication flow channels can make the control of the liquid intake amount more accurate according to different types of user beverage requirements. In this embodiment, if the user needs a cold milk foam or a cold milk type beverage, the first conversion member 52c is switched to the first communication flow channel 231; if the user needs a hot milk foam or a hot milk type beverage, the first conversion member 52c is switched to the second communication flow channel 232.

[0136] In this embodiment, the emulsifying device 500 is configured as a milk tank, which includes a tank body 11 and a cover assembly 12 covering the upper part of the tank body 11. The tank body 11 has a liquid storage cavity for containing liquid, and the hollow body 20c is arranged on the cover assembly 12. An operation part 50c connecting the first conversion part 52c and an air intake amount adjusting part 60 connecting the second conversion part 53c are arranged outside the cover assembly 12. The operation part 50c is arranged on the side part of the cover assembly 12, and the air intake amount adjusting part 60 is arranged on the top of the cover assembly 12. A first through hole 120 corresponding to the position of the first opening 233c is provided on the side part of the cover assembly 12, and a second through hole 123c corresponding to the position of the air passage 24 is provided on the top of the cover assembly 12. The operation part 50c and the first conversion part 52c are integrally arranged or relatively fixedly connected. One end of the first conversion part 52c passes through the first through hole 120 and extends into the liquid passage 23 from the first opening 233c, and the other end of the first conversion part 52c forms the operation part 50c. A relief groove 111 is arranged on the tank body 11, and the operation part 50c is exposed from the relief groove 111 for convenient operation. The air intake amount adjusting part 60 and the second conversion part 53c are integrally arranged. One end of the second conversion part 53c extends into the air passage 24, and the other end of the second conversion part 53c forms the air intake amount adjusting part 60, which is exposed from the second through hole 123c for convenient operation.

[0137] Both the operation part 50c and the air intake amount adjusting part 60 are arranged on the milk tank, and the adjustment of the air supply amount and the liquid supply amount is realized by directly operating on the milk tank. The hollow body 20c is arranged on the cover assembly 12, and the space of the cover assembly 12 can be utilized. Both the first conversion part 52c and the second conversion part 53c are connected to the cover assembly 12, making the overall structure of the milk tank simple and compact. Among them, the cover assembly 12 includes an upper cover 121 and a lower cover 122. An accommodation space is defined between the upper cover 121 and the lower cover 122. The hollow body 20c is arranged in the accommodation space. The air passage 24 and the liquid passage 23 are arranged opposite to each other along the radial direction of the hollow body 20c. The first conversion part 52c extends into the liquid passage 23 along a direction perpendicular to the extending direction of the liquid passage 23, and the second conversion part 53c extends into the air passage 24 along the extending direction of the air passage 24. The connection between the hollow body 20c and the first conversion part 52c and the second conversion part 53c is more convenient, and the overall structure is compact.

[0138] Continue to refer to Figures 24 to 26, a cylindrical seal 244c is provided in the air passage 24. A through hole is provided at the bottom of the seal 244c. A longitudinally extending variable cross-section air intake groove 511c is provided on one of the inner wall of the seal 244c and the outer wall of the second conversion member 53c. A sealing rib 245c is provided on the other of the inner wall of the seal 244c and the outer wall of the second conversion member 53c. The variable cross-section air intake groove 511c communicates with the air passage 24 through the through hole. The sealing rib 245c cooperates with the variable cross-section air intake groove 511c to change the air intake volume of the air passage 24. In this embodiment, the variable cross-section air intake groove 511c is provided on the outer wall of the second conversion member 53c, and the sealing rib 245c is provided on the inner wall of the seal 244c, and the sealing rib 245c extends along both the circumferential and axial directions of the seal 244c. Thus, when the second conversion member 53c rotates relative to the seal 244c, the position where the variable cross-section air intake groove 511c cooperates with the sealing rib 245c is different, and the cross-sectional area of the air intake groove changes, realizing the adjustment of the air intake volume. Among them, when the second conversion member 53c rotates in one direction, the cross-sectional area of the air intake groove gradually decreases, or it can also be set that the cross-sectional area of the air intake groove gradually increases; of course, it can also be that according to different cold and hot milk foam gears selected by the operation part 50c, when the second conversion member 53c rotates in one direction within the range corresponding to cold milk foam, the cross-sectional area of the air intake groove gradually decreases / increases, and within the range corresponding to hot milk foam, the cross-sectional area of the air intake groove gradually increases / decreases.

[0139] In this embodiment, the switching of two kinds of liquid intake volumes is realized by providing two communicating flow channels. Of course, more communicating flow channels can also be provided to realize the stepped adjustment of the liquid intake volume. The cooperation between the variable cross-section air intake groove 511c and the sealing rib 245c realizes the stepless adjustment of the air intake volume. In other implementable ways, it can also be that the liquid intake volume is steplessly adjusted, while the air intake volume is steppedly adjusted.

[0140] Refer to Figures 28 to 33As shown, this is the sixth preferred embodiment of the present invention. The emulsifying device 600 includes a Venturi structure, which is configured to generate a Venturi effect. The Venturi structure includes a first mixing chamber 41 and a second mixing chamber 42. The first mixing chamber 41 is connected to the corresponding first steam channel 411, first liquid channel 412, first air channel 413, and outlet channel 45d; the second mixing chamber 42 is connected to the corresponding second steam channel 421, second liquid channel 422, second air channel 423, and outlet channel 45d. The first steam channel 411 and the second steam channel 421 are respectively used to connect to a steam source, the first liquid channel 412 and the second liquid channel 422 are respectively used to connect to a liquid storage source, the first air channel 413 and the second air channel 423 are respectively used to connect to air, and the outlet channel 45d is used to output the mixed fluid generated by the first mixing chamber 41 or the second mixing chamber 42 based on the Venturi effect. The first liquid channel 412 corresponds to the first milk foam gear, and the second liquid channel 422 corresponds to the second milk foam gear. Two independent mixing chambers can mix liquid, steam, and air in their respective proportions, so that milk foam at different temperatures can be output.

[0141] The emulsifying device 600 further includes a conversion device, which is operated to control the steam flow to enter the first mixing chamber 41 from the first steam channel 411 or to enter the second mixing chamber 42 from the second steam channel 421, thereby switching between the first milk foam gear and the second milk foam gear. By controlling the flow direction of the steam flow through the conversion device, the mixing chamber for fluid mixing is selected, that is, the first milk foam gear or the second milk foam gear is selected. The emulsifying device can output hot and cold milk foam with different temperature ranges, so that milk foam with different flavors can be obtained to meet the needs of different users for more flavors.

[0142] Among them, the cross-sectional area of the minimum passing port of the first liquid channel 412 leading to the first mixing chamber 41 is larger than the cross-sectional area of the minimum passing port of the second liquid channel 422 leading to the second mixing chamber 42. The cross-sectional area of the minimum passing port of the first liquid channel 412 leading to the first mixing chamber 41 and the cross-sectional area of the minimum passing port of the first air channel 413 leading to the first mixing chamber 41 have a first preset corresponding relationship. The cross-sectional area of the minimum passing port of the second liquid channel 422 leading to the second mixing chamber 42 and the cross-sectional area of the minimum passing port of the second air channel 423 leading to the second mixing chamber 42 have a second preset corresponding relationship. The preset corresponding relationship means that the cross-sectional area of the minimum passing port of the first liquid channel 412 leading to the first mixing chamber 41 corresponds to the cross-sectional area of the minimum passing port of the first air channel 413 leading to the first mixing chamber 41 within a first range, and the cross-sectional area of the minimum passing port of the second liquid channel 422 leading to the second mixing chamber 42 corresponds to the cross-sectional area of the minimum passing port of the second air channel 423 leading to the second mixing chamber 42 within a second range, so that milk foams with different temperatures can be output. The cross-sectional area of the minimum passing port is defined as the minimum cross-sectional area of the fluid passing port where the fluid channel communicates with the mixing chamber.

[0143] Specifically, the first preset corresponding relationship is preferably that the cross-sectional area of the minimum passing port of the first liquid channel 412 leading to the first mixing chamber 41 is greater than or equal to a first preset value, and the cross-sectional area of the minimum passing port of the first air channel 413 leading to the first mixing chamber 41 is within a first set range; the second preset corresponding relationship is preferably that the cross-sectional area of the minimum passing port of the second liquid channel 422 leading to the second mixing chamber 42 is less than or equal to a second preset value, and the cross-sectional area of the minimum passing port of the second air channel 423 leading to the second mixing chamber 42 is within a second set range; the first preset value is more than twice, preferably three times, the second preset value, and the first set range and the second set range partially overlap. Based on the first preset corresponding relationship or the second preset corresponding relationship, the mixing ratio of the liquid and the air is determined. The liquid supply amounts of the two liquid channels are different, and the air supply amount corresponds to the liquid supply amount of its respective liquid channel, so that milk foams with different temperatures and ensured quality can be generated, such as cold milk foam with a temperature in the range of 10°C to 30°C and hot milk foam with a temperature in the range of 40°C to 70°C, thereby ensuring that the temperatures and qualities of the generated cold and hot milk foams can meet the requirements of users.

[0144] In this embodiment, the emulsifying device 600 is configured as a milk tank, which obtains steam flow by connecting to a beverage machine. The conversion device includes a control valve 70, which is arranged on the beverage machine. The beverage machine is provided with a first steam interface 71 and a second steam interface 72 connected to the control valve 70, the first steam channel 411 is connected to the first steam interface 71, and the second steam channel 421 is connected to the second steam interface 72. The control valve 70 controls the steam flow to be output from the first steam interface 71 or the second steam interface 72 based on the input operation of the operation key or the operation panel of the beverage machine. The input operation of the operation key or the operation panel can be to directly select the flavor of the milk foam or to select a beverage prepared by the milk foam. The milk foam flavor corresponding to the beverage has been set in the control program of the beverage machine. The user directly selects the desired beverage, and the control valve 70 controls the corresponding steam interface to output the steam flow based on the setting of the control program, so as to generate the milk foam corresponding to the beverage. By one-key operation on the beverage machine, the flow direction of the steam flow is selected, and milk foam with different temperatures and guaranteed quality can be generated.

[0145] Reference Figures 29 to 31 As shown, the venturi structure includes a main body part 40 and a pipe connector 30, a first steam channel 411 and a second steam channel 421 are arranged at intervals in the main body part 40, and a first mixing chamber 41 and a second mixing chamber 42 are arranged at intervals in the pipe connector 30. Preferably in this embodiment, the main body part 40 includes a first tubular body 401 and a second tubular body 402, the first steam channel 411 is arranged in the first tubular body 401, the second steam channel 421 is arranged in the second tubular body 402, the pipe connector 30 includes a first connecting channel 31 and a second connecting channel 32 arranged at intervals, the first tubular body 401 extends into the first connecting channel 31, the second tubular body 402 extends into the second connecting channel 32, and the outlet channel 45d is arranged in the pipe connector 30. The two tubular bodies are provided to facilitate the generation of different milk foams while ensuring the dimensional accuracy of each channel.

[0146] The first tubular body 401 includes a first inner section 403 extending into the first connecting channel 31 and a first outer section 404 exposed from the first connecting channel 31, the second tubular body 402 includes a second inner section 405 extending into the second connecting channel 32 and a second outer section 406 exposed from the second connecting channel 32, the first outer section 404 and the second outer section 406 form a conjoined structure, the first liquid channel 412 passes through the tube wall of the first connecting channel 31 to communicate with the first mixing chamber 41, and the second liquid channel 422 passes through the tube wall of the second connecting channel 32 to communicate with the second mixing chamber 42. Two independent milk foam forming structures are formed by the cooperation of the main body part 40 and the tube connector 30, which is convenient to assemble, and the structure of the two tubular body parts being conjoined is compact as a whole, which can make the installation of the main body part 40 and the tube connector 30 more convenient, and the size of each channel can be accurately controlled.

[0147] Among them, the first mixing chamber 41 includes a first upstream mixing chamber 415 which can be jointly defined by the space within the pipe connector 30 and the space within the main body member 40. The first liquid channel 412 passes through the pipe connector 30. The second mixing chamber 42 includes a second upstream mixing chamber 425 which can be jointly defined by the space within the pipe connector 30 and the space within the main body member 40. The second liquid channel 422 passes through the pipe connector 30. The first steam channel 411 and the second steam channel 421 alternatively introduce a steam flow, and a local vacuum is generated within the first upstream mixing chamber 415 or the second upstream mixing chamber 425. Under the action of negative pressure, the milk from the liquid storage source will be sucked in through the first liquid channel 412 or through the second liquid channel 422 to be mixed with the steam and air together.

[0148] Preferably, the first mixing chamber 41 may include a first upstream mixing chamber 415 and a first downstream mixing chamber 416 which are sequentially arranged along the direction of fluid input to output. The milk foam after foaming in the first upstream mixing chamber 415 enters the first downstream mixing chamber 416 under the action of inertia and subsequent steam propulsion. The second mixing chamber 42 may include a second upstream mixing chamber 425 and a second downstream mixing chamber 426 which are sequentially arranged along the direction of fluid input to output. The milk foam after foaming in the second upstream mixing chamber 425 enters the second downstream mixing chamber 426 under the action of inertia and subsequent steam propulsion. The steam, milk, and air in the first downstream mixing chamber 416 or the second downstream mixing chamber 426 are further mixed to obtain a sufficient, uniform, and firm milk foam, and the foaming degree also increases accordingly. The formed milk foam will be discharged from the outlet channel 45d, and the outlet channel 45d is connected to the outlet pipe 26 and is output to the user's beverage cup through the outlet pipe 26.

[0149] Among them, both the first downstream mixing chamber 416 and the second downstream mixing chamber 426 are defined by the main body part 40 within the pipe connector 30. The length of the first downstream mixing chamber 416 is greater than that of the first upstream mixing chamber 415, and the length of the second downstream mixing chamber 426 is greater than that of the second upstream mixing chamber 425. Steam, milk, and air can be more fully mixed within the downstream mixing chambers. The first upstream mixing chamber 415 has a first upstream outlet 417, and the first upstream outlet 417 is arranged on the main body part 40. The first downstream mixing chamber 416 has a first downstream outlet 317, and the first downstream outlet 317 is arranged on the pipe connector 30. The second upstream mixing chamber 425 has a second upstream outlet 427, and the second upstream outlet 427 is arranged on the main body part 40. The second downstream mixing chamber 426 has a second downstream outlet 327, and the second downstream outlet 327 is arranged on the pipe connector 30. Among them, the cross-sectional area of the first upstream outlet 417 is greater than that of the second upstream outlet 427, and the cross-sectional area of the first downstream outlet 317 is greater than that of the second downstream outlet 327, while the cross-sectional area of the steam nozzle of the first steam channel 411 is smaller than that of the steam nozzle of the second steam channel 421, so as to further increase the temperature difference of the milk foam output from the two mixing chambers.

[0150] Furthermore, a first one-way valve 431 is arranged within the first steam channel 411, and a second one-way valve 432 is arranged within the second steam channel. The first one-way valve 431 allows opening along the direction of steam flowing into the first mixing chamber 41, and the second one-way valve 432 allows opening along the direction of steam flowing into the second mixing chamber 42. Arranging one one-way valve in each of the two steam channels can prevent steam or other fluids from flowing back through the other steam channel when steam is introduced into one of the steam channels, ensuring that the milk foam production process is more reliable. First joint sealing sleeves 441 and second joint sealing sleeves 442 are also respectively arranged within the first steam channel 411 and the second steam channel 421. The first one-way valve 431 is defined between the stepped portion of the first steam channel 411 and the first joint sealing sleeve 441, and the second one-way valve 432 is defined between the stepped portion of the second steam channel 421 and the second joint sealing sleeve 442. The one-way connection of the steam channels is realized through a simple structure, which is convenient for assembly and reduces costs. The first one-way valve 431 and the second one-way valve 432 can be set as spherical elements, and springs are arranged between the spherical elements and the stepped portions of the steam channels. The springs press against the spherical elements to close the outlets on the joint sealing sleeves, so as to ensure a more reliable structure.

[0151] Continue to refer to Figures 32 to 33, the upstream portions of the first air passage 413 and the second air passage 423 communicate to form an air hole 33. The emulsifying device 600 includes a second conversion member 53d that extends at least partially into the air hole 33. One of the outer wall of the second conversion member 53d and the inner wall of the air hole 33 is provided with a longitudinally extending first variable cross-section air intake groove 515 and a second variable cross-section air intake groove 516, and the other of the outer wall of the second conversion member 53d and the inner wall of the air hole 33 is provided with a first sealing rib 331 and a second sealing rib 332. The first variable cross-section air intake groove 515 communicates with the first air passage 413, the second variable cross-section air intake groove 342 communicates with the second air passage 423, the first sealing rib 331 cooperates with the first variable cross-section air intake groove 515 to change the air intake volume of the first air passage 413, and the second sealing rib 332 cooperates with the second variable cross-section air intake groove 516 to change the air intake volume of the second air passage 423.

[0152] As the second conversion member 53d adjusts and moves in one direction, the air supply volume can gradually decrease or increase. When selecting cold milk foam or hot milk foam, the fineness of the milk foam can be further selected by operating the second conversion member 53d. The second conversion member 53d can be connected to the air intake volume adjustment part 60b or integrally formed with the air intake volume adjustment part 60b. The air intake volume adjustment part 60b is configured as a knob, which is provided on the top of the milk can. The air intake volume of the first mixing chamber 41 and the second mixing chamber 42 can be controlled by one knob, which is convenient to operate while having a compact structure. The milk can includes a can body 11 and a cover assembly 12 covering the upper part of the can body 11. The can body 11 has a liquid storage chamber for containing liquid. The second conversion member 53d passes through the installation opening 123d and is connected to the air intake volume adjustment part 60b. The air intake volume adjustment part 60b drives the second conversion member 53d to move to change the cross-sectional area of the minimum air passage opening of the two air passages.

[0153] Referring to Figure 33 , the emulsifying device 600 may further include a locking member 81. The locking member 81 is disposed between the main body member 40 and the pipe connecting member 30. The locking member 81 is operable to move between two positions to allow and restrict the separation of the main body member 40 from the pipe connecting member 30 along the extending direction of the first connecting passage 31 or the second connecting passage 32. By providing the locking member 81, when connecting the milk can to the steam interface on the beverage machine, it can prevent the separation of the main body member 40 from the pipe connecting member 30 during the process of forming pressure by the steam flow injection, or avoid the misalignment of the main body member 40 and the pipe connecting member 30 caused by accidental operation of the user. For example, when inserting or removing the milk can, it can prevent the main body member 40 from detaching from the milk can and remaining on the main body of the beverage machine. At this time, if making a beverage, it may cause harm to the human body. Setting the locking member can ensure that the milk can is safer and more reliable to use.

[0154] In addition, an unlocking member 82 may be provided on the milk tank, the unlocking member 82 is connected to the locking member 81, a card slot 46 is provided on the main body 40, a guide slot 39 is provided at a position corresponding to the card slot 46 on the pipe connector 30, the guide slot 39 is communicated with the card slot 46, the locking member 81 extends from the guide slot 39 into the card slot 46, and the unlocking member 82 can operably drive the locking member 81 to move along the guide slot 39 and separate from the card slot 46. The locking member 81 is inserted into the guide slot 39 and the card slot 46 at the same time to lock the main body 40 and the pipe connector 30, which has a simple structure and reliable operation.

[0155] Reference Figures 34 to 36 As shown, the emulsification device 700 of the seventh preferred embodiment of the present invention is different from the sixth embodiment in that the emulsification device 700 includes a first sealing plug 351 extending into the first air channel 413 and a second sealing plug 352 extending into the second air channel 423, the first sealing plug 351 is provided with a first air inlet 353 for connecting the external air and the first mixing chamber 41, and the second sealing plug 352 is provided with a second air inlet 354 for connecting the external air and the second mixing chamber 42. Preferably, the first sealing plug 351 is connected to the first sealing sheet 361, and the second sealing plug 352 is connected to the second sealing sheet 362. The first sealing sheet 361 is provided with a first opening 363, and the second sealing sheet 362 is provided with a second opening 364. The hole cross-sectional area of ​​the first opening 363 is configured as the cross-sectional area of ​​the minimum through-port from the first air channel 413 to the first mixing chamber 41, and the hole cross-sectional area of ​​the second opening 364 is configured as the cross-sectional area of ​​the minimum through-port from the second air channel 423 to the second mixing chamber 42.

[0156] The sealing sheet can limit the air to enter the mixing chamber only from the opening. The opening is formed by providing an independent sealing sheet, which is convenient for processing, and the diameter of the opening can be accurately processed, so as to accurately control the air intake and ensure the required milk foam quality. In addition, the first sealing plug 351 and the second sealing plug 352 can be exposed relative to the milk tank part, and the exposed part is set to a conjoined structure. When the sealing plugs need to be removed, it is convenient to remove the two sealing plugs at the same time.

[0157] In this embodiment, the emulsifying device 700 may also be provided with a locking member and an unlocking member as in the above embodiment to prevent the main body component 40 from being separated from the pipe connector 30 during the process of forming pressure by steam jet. The specific structure may be the same as in the above embodiment, or any structure may be used as long as the locking and operable unlocking of the main body component 40 and the pipe connector 30 can be achieved.

[0158] Reference Figure 37As shown, the emulsifying device 800 of the eighth preferred embodiment of the present invention is different from the sixth embodiment in that the first mixing chamber 41 includes a first upstream mixing chamber 415 and a first downstream mixing chamber 416a, and the second mixing chamber 42 includes a second upstream mixing chamber 425 and a second downstream mixing chamber 426a; the first downstream mixing chamber 416a and the second downstream mixing chamber 426a form a mutually communicating downstream mixing chamber. Along the fluid outflow direction, the cross-sectional area of the downstream mixing chamber is larger than the cross-sectional area of the first upstream mixing chamber 415, and the cross-sectional area of the downstream mixing chamber is larger than the cross-sectional area of the second upstream mixing chamber 425; the length of the downstream mixing chamber is greater than the length of the first upstream mixing chamber 415, and the length of the downstream mixing chamber is also greater than the length of the second upstream mixing chamber 425. This embodiment includes the following situation: the first upstream mixing chamber 415 and the second upstream mixing chamber 425 share the downstream mixing chamber, that is, the first downstream mixing chamber 416a and the second downstream mixing chamber 426a are the same mixing chamber. By sharing the downstream mixing chamber, the space of the downstream mixing chamber can be increased, enabling more sufficient foaming of air, liquid, and steam, and making the entire Venturi structure more compact.

[0159] In this embodiment, the Venturi structure includes a single main body part 40a and a pipe connector 30a. The first steam channel 411 and the second steam channel 421 are arranged at intervals in the single main body part 40a, and the first mixing chamber 41 and the second mixing chamber 42 are arranged at intervals in the pipe connector 30a, specifically arranged in the space jointly defined by the pipe connector 30a and the single main body part 40a. The pipe connector 30a includes a single connection channel 37, the main body part 40a extends into the connection channel 37, and the outlet channel 45d is arranged in the pipe connector 30a. The cooperation between the single main body part 40a and the pipe connector 30a is simpler and more convenient to install.

[0160] In this embodiment, the emulsifying device 800 can also be provided with the locking member and the unlocking member as in the above embodiment to prevent the separation of the main body part 40a and the pipe connector 30a during the process of forming pressure by the steam flow injection. The specific structure can be the same as that of the above embodiment, or as long as the locking and operable unlocking of the main body part 40a and the pipe connector 30a can be achieved.

[0161] Refer to Figures 38 to 40As shown, the emulsifying device 900 of the ninth preferred embodiment of the present invention is different from the sixth embodiment in that the emulsifying device 900 includes a tank body 11 and a cover assembly 12 covering the upper part of the tank body 11. The tank body 11 has a liquid storage cavity for containing liquid, and the Venturi structure is arranged on the cover assembly 12. The conversion device is arranged on the milk tank or the cover assembly 12 of the milk tank. The first steam channel 411 and the second steam channel 421 are connected to a single steam joint 73 through the conversion device. An operation part 50e is arranged on the cover assembly 12. The operation part 50e can be configured as a knob or a push button. The operation part 50e drives the conversion device to move so as to switch the steam flow from the steam joint 73 to enter the first mixing cavity 41 from the first steam channel 411 or enter the second mixing cavity 42 from the second steam channel 421.

[0162] In this embodiment, the emulsifying device 900 can also be provided with a locking member and an unlocking member as in the above embodiment to prevent the main body part 40b from separating from the pipe connecting part 30b during the process of the steam flow jetting to form pressure. The specific structure can be the same as that of the above embodiment, or as long as the locking of the main body part 40b and the pipe connecting part 30b and the operable unlocking can be achieved.

[0163] Referring to Figure 39 , the conversion device includes a reversing member 58. The reversing member 58 is provided with a bent conversion channel 581. By operating the reversing member 58 to rotate through the operation part outside the milk tank, the flow direction of the steam flow is changed, and the steam flow in the steam joint 73 flows through the conversion channel 581 to the first steam channel 411 or the second steam channel 421.

[0164] Referring to Figure 14 , the reversing member 58a is provided with two spaced conversion channels 581a. By operating the reversing member 58a to move through the operation part outside the milk tank, the flow direction of the steam flow is changed, and the steam flow in the steam joint 73 flows through one of the conversion channels 581a to the first steam channel 411 or the second steam channel 421.

[0165] A single steam joint is arranged on the milk tank, which is convenient for cooperating with the single steam interface on the beverage machine. A check valve 433 is arranged on the steam joint. The structure of the check valve 433 is the same as that of the sixth embodiment. The reversing member 58 can be arranged between the check valve 433 and the two steam channels. The conversion device is arranged on the milk tank, and the output of hot and cold milk foam can be realized without changing the structure of the single steam interface of the beverage machine or setting up an adapter, thus reducing the cost.

[0166] In the above embodiments, by controlling the flow direction of the steam flow, the mixing chamber for fluid mixing is selected, and the mixing ratio of the liquid and air is determined based on the first preset correspondence or the second preset correspondence. The liquid supply amounts and air supply amounts of the two liquid channels are different, and the air supply amount corresponds to the liquid supply amount of its respective liquid channel, so that milk foams with different temperatures and ensured quality can be generated, such as cold milk foam with a temperature in the range of 10°C to 30°C and hot milk foam with a temperature in the range of 40°C to 70°C. The emulsifying device can realize the output of cold and hot milk foams, so that milk foams with different flavors can be obtained to meet the needs of different users for more flavors.

[0167] Referring Figures 41 to 47 As shown, the emulsifying device 1000 of the tenth preferred embodiment of the present invention is different from the sixth embodiment in that the first air channel 413 is connected to the first air valve 381, the second air channel 423 is connected to the second air valve 382, the first air valve 381 is automatically opened based on the negative pressure formed in the first mixing chamber 41 to allow external air to enter the first mixing chamber 41, the second air valve 382 is automatically opened based on the negative pressure formed in the second mixing chamber 42 to allow external air to enter the second mixing chamber 42, the first air valve 381 is connected to the first sealing piece 361a, the second air valve 382 is connected to the second sealing piece 362a, the inlet of the first air valve 381 is covered by the first sealing piece 361a, the inlet of the second air valve 382 is covered by the second sealing piece 362a, the first sealing piece 361a is provided with a first opening 363a, the second sealing piece 362a is provided with a second opening 364a, the first air valve 381 communicates with external air through the first opening 363a, the second air valve 382 communicates with external air through the second opening 364a, the cross-sectional area of the first opening 363a is configured as the cross-sectional area of the minimum passing port from the first air channel 413 to the first mixing chamber 41, and the cross-sectional area of the second opening 364a is configured as the cross-sectional area of the minimum passing port from the second air channel 423 to the second mixing chamber 42. The air valve and the sealing piece can be fixed in the air channel through a sealing plug.

[0168] The air valve can ensure that the air channel is in a closed state when the milk can is not in use, and the sealing piece can limit that air can only enter the mixing chamber from the opening. By providing an independent sealing piece to form the opening, it is convenient for processing, and the diameter of the opening can be accurately processed, so as to accurately control the air intake amount and ensure the required milk foam quality.

[0169] Further, a locking member 81 is provided between the main body member 40c and the pipe connector 30c. The locking member 81 is operable to move between two positions to allow and restrict the separation of the main body member 40c from the pipe connector 30c along the extension direction of the connection channel. By providing the locking member, when connecting the milk can to the steam interface on the beverage machine, the separation of the main body member 40c from the pipe connector 30c can be prevented, or the misalignment of the main body member 40c and the pipe connector 30c caused by accidental operation of the user can be avoided, ensuring more reliable use of the milk can.

[0170] Specifically, an unlocking member 82 is provided outside the milk can. The unlocking member 82 is connected to the locking member 81. A card slot 46 is provided on the main body member 40c. A guiding slot 39 is provided at a position corresponding to the card slot 46 on the pipe connector 30c. The guiding slot 39 communicates with the card slot 46. The locking member 81 extends into the card slot 46 from the guiding slot 39. The unlocking member 82 is operable to drive the locking member 81 to move along the guiding slot 39 to separate from the card slot 46. The locking member 81 locks the main body member 40c and the pipe connector 30c by inserting into the guiding slot 39 and the card slot 46 at the same time, with a simple structure and reliable operation.

[0171] An opening slot 125 is provided on the lid assembly 12 of the milk can. The unlocking member 82 passes through the opening slot 125 and is connected to the locking member 81. The extending direction of the opening slot 125 is the same as the guiding direction of the guiding slot 39. The unlocking member 82 is operable to drive the locking member 81 to move along the opening slot 125 to separate from the card slot 46. The user only needs to operate according to the instructions to unlock between the main body member 40c and the pipe connector 30c. A hook 821 is provided on the unlocking member 82. An installation slot 811 corresponding to the opening slot 125 is provided on the locking member 81. The hook 821 passes through the opening slot 125 and is clamped in the installation slot 811, facilitating the connection of the unlocking member 82 to the locking member 81 from the outside of the milk can. A support column 86 protrudes from one side of the locking member 81. A part of a spring 87 is sleeved on the support column 86. The spring 87 is used to keep the locking member 81 in the locked state located in the guiding slot 39 and the card slot 46. In addition, when operating the unlocking member 82, the elastic force of the spring 87 needs to be overcome, and the unlocking member 82 can be automatically reset under the elastic force of the spring 87 when released.

[0172] The milk can includes a steam interface portion for connecting to a steam source. The unlocking member 82 and the steam interface portion are on the same side of the milk can or the lid assembly 12. In this way, when the milk can is connected to the beverage machine, the user cannot operate the unlocking member 82, thereby preventing accidental unlocking of the main body member 40c and the pipe connector 30c, or pulling out the milk can during beverage making, which may cause harm to the human body.

[0173] Among them, the card slot 46 includes a first card slot 461 provided on the first tubular body 401 and a second card slot 462 provided on the second tubular body 402. The guiding groove 39 includes a first guiding groove 391 and a second guiding groove 392 that are spaced apart on the pipe connector 30. The locking member 81 includes a first clamping block 813 and a second clamping block 815 that are spaced apart. The first clamping block 813 extends into the first guiding groove 391 and the first card slot 461, and the second clamping block 815 extends into the second guiding groove 392 and the second card slot 462. By providing two clamping blocks and card slots, the locking between the main body component 40c and the pipe connector 30c can be made more reliable, with uniform force. The locking member 81 drives the two clamping blocks simultaneously, making installation and disassembly very convenient.

[0174] The outlet passage 45d includes a single output section 451d, a first output sub-section 452d communicating with the single output section 451d, and a second output sub-section 453d communicating with the single output section 451d. The first output sub-section 452d communicates with the first downstream foaming chamber 416, and the second output sub-section 453d communicates with the second downstream foaming chamber 426.

[0175] The present invention also relates to a beverage machine, which includes an emulsifying device in any of the above embodiments. The single steam channel of the emulsifying device communicates with the beverage machine, or one of the first steam channel and the second steam channel of the emulsifying device communicates with the beverage machine. The beverage machine can generate a steam source, and when the steam channel of the emulsifying device communicates with the beverage machine, the beverage machine provides steam to the emulsifying device.

[0176] In the above embodiments, through the conversion device based on the selection of the operation part, the liquid supply amount is different at different milk foam levels, and milk foam with different temperatures can be output, which is more convenient to use and meets the needs of different users for more flavors. In addition, the liquid supply amount of the liquid channel and the air intake amount of the air channel can be adjusted simultaneously. The air supply amount corresponds to the liquid supply amount of the respective liquid channels, and milk foam with different temperatures and ensured quality can be generated.

[0177] It should be understood that although this specification is described according to embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and 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.

[0178] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An emulsifying device, comprising a Venturi structure and a single output pipe connected to the Venturi structure, wherein the Venturi structure comprises: At least one mixing chamber, the at least one mixing chamber communicating with a corresponding steam channel, a liquid channel, an air channel and an outlet channel, and the outlet channel being connected to the single output pipe; The steam channel is used for communicating with a steam source, the liquid channel is used for communicating with a liquid storage source, the air channel is used for communicating with air, and the outlet channel is used for outputting a mixed fluid generated by the at least one mixing chamber based on the Venturi effect; It is characterized in that the emulsifying device comprises a first milk foam gear for outputting cold dairy products and a second milk foam gear for outputting hot dairy products from the single output pipe, and the cross-sectional area of the minimum liquid passage opening from the liquid channel to the at least one mixing chamber in the first milk foam gear is larger than the cross-sectional area of the minimum liquid passage opening from the liquid channel to the at least one mixing chamber in the second milk foam gear; The emulsifying device comprises a conversion device and an operation part, and the conversion device switches between the first milk foam gear or the second milk foam gear based on the selection of the operation part.

2. The emulsifying device according to claim 1, characterized in that, The cross-sectional area of the minimum air passage opening from the air channel to the at least one mixing chamber in the first milk foam gear is greater than or equal to the cross-sectional area of the minimum air passage opening from the air channel to the at least one mixing chamber in the second milk foam gear. The conversion device operably adjusts the cross-sectional area of the minimum air passage opening, and the adjustment of the cross-sectional area of the minimum air passage opening is based on a preset corresponding relationship, and the preset corresponding relationship is defined as the proportional relationship between the cross-sectional area of the minimum liquid passage opening and the cross-sectional area of the minimum air passage opening.

3. The emulsifying device according to claim 1 or 2, characterized in that, A single steam channel communicates with the at least one mixing chamber, and the conversion device is inserted into the liquid channel and the air channel to respectively form a variable liquid flow part and a variable air flow part. The operation part is used to drive the conversion device to move to change the cross-sectional area of the minimum liquid passage opening of the liquid channel through the variable liquid flow part, and to change the cross-sectional area of the minimum air passage opening of the air channel through the variable air flow part.

4. The emulsifying device according to claim 3, wherein The variable air flow part and the variable liquid flow part are arranged at intervals, and are separated by an air groove. The air groove communicates with the liquid channel, and air enters the at least one mixing chamber together with the liquid in the liquid channel after passing through the variable air flow part and the air groove in sequence.

5. The emulsifying device according to claim 3, wherein, The conversion device comprises a first communication flow channel and a second communication flow channel arranged between the liquid channel and the at least one mixing chamber. The cross-sectional areas of the first communication flow channel and the second communication flow channel are different, and the first communication flow channel and the second communication flow channel are configured as the variable liquid flow part. In the first milk foam gear, the first communication flow channel communicates with the at least one mixing chamber; In the second milk foam gear, the second communication flow channel communicates with the at least one mixing chamber.

6. The emulsifying device according to claim 5, characterized in that, The first communication channel has an upstream opening and a downstream opening, the second communication channel has an upstream opening and a downstream opening, and at least one of the upstream opening and the downstream opening communicates with the air tank, and air enters the at least one mixing chamber from the air tank together with the liquid in the first communication channel or the second communication channel.

7. The emulsifying device according to claim 3, characterized in that, The Venturi structure includes a hollow body forming the at least one mixing chamber, the conversion device includes a single conversion member connecting the liquid channel, and the single conversion member extends into the air channel along the extending direction of the air channel. When the operating portion drives the single conversion member to move relative to the hollow body, the cross-sectional area of the minimum air passage and the cross-sectional area of the minimum liquid passage are changed.

8. The emulsifying device according to claim 3, characterized in that, The Venturi structure includes a hollow body forming the at least one mixing chamber, the conversion device includes a first conversion member connecting the liquid channel and a second conversion member connecting the air channel, and the operating portion drives the first conversion member and the second conversion member to move synchronously to change the cross-sectional area of the minimum air passage and the cross-sectional area of the minimum liquid passage.

9. The emulsifying device according to claim 8, wherein The second conversion member extends into the air channel along the extending direction of the air channel, and the second conversion member rotates around the central axis of the air channel to drive the first conversion member to move linearly.

10. The emulsifying device according to claim 8, characterized in that The air channel includes a first section and a second section arranged at an angle, the second conversion member extends into the air channel along a direction perpendicular to the extension of the first section, and the second conversion member rotates relative to the hollow body to drive the first conversion member to move linearly.

11. The emulsifying device according to claim 8, wherein, The liquid channel and the air channel communicate with different positions of the at least one mixing chamber. The liquid channel is provided with a first opening, the first conversion member extends into the liquid channel from the first opening, the air channel has a second opening, and the second conversion member extends into the air channel from the second opening. The first opening and the second opening face the same direction.

12. The emulsifying device according to claim 8, characterized in that, A passage port cooperating with the first conversion member is provided in the liquid channel, and the cooperating portion of the first conversion member and the passage port is configured as the liquid flow variable portion. The first conversion member changes the cross-sectional area of the minimum liquid passage by adjusting the fluid passage area of the passage port.

13. The emulsifying device according to claim 1, characterized in that It further includes a tank body and a cover assembly covering the upper part of the tank body. The tank body has a liquid storage chamber, and the Venturi structure is arranged on the cover assembly; an installation opening is provided outside the cover assembly, the conversion device passes through the installation opening and is connected to the operating portion, and the operating portion is configured as a knob. The knob drives the conversion device to move to change the cross-sectional area of the minimum liquid passage.

14. The emulsifying device according to claim 1, characterized in that, The at least one mixing chamber includes: A first mixing chamber, which communicates with a corresponding first steam channel, a first liquid channel, and a first air channel; A second mixing chamber, which communicates with a corresponding second steam channel, a second liquid channel, and a second air channel; Both the first mixing chamber and the second mixing chamber are connected to the outlet channel, and the outlet channel is used to output the mixed fluid generated by the first mixing chamber or the second mixing chamber based on the Venturi effect; the first liquid channel corresponds to the first milk foam gear, and the second liquid channel corresponds to the second milk foam gear; The conversion device controls the steam flow to enter the first mixing chamber from the first steam channel or enter the second mixing chamber from the second steam channel.

15. The emulsifying device according to claim 14, characterized in that, The emulsifying device includes a tank body and a cover assembly covering the upper part of the tank body. The tank body has a liquid storage chamber for containing liquid, and the Venturi structure is arranged on the cover assembly; the conversion device is arranged on the cover assembly, the first steam channel and the second steam channel are connected to a single steam joint through the conversion device, the operation part is arranged on the cover assembly, and the operation part drives the conversion device to move to control the steam flow.

16. The emulsifying device according to claim 14, characterized in that, The cross-sectional area of the minimum air passage from the first air channel to the first mixing chamber and the cross-sectional area of the minimum liquid passage from the first liquid channel to the first mixing chamber have a first preset corresponding relationship, and the cross-sectional area of the minimum air passage from the second air channel to the second mixing chamber and the cross-sectional area of the minimum liquid passage from the second liquid channel to the second mixing chamber have a second preset corresponding relationship; For the first preset corresponding relationship, the cross-sectional area of the minimum liquid passage from the first liquid channel to the first mixing chamber is greater than or equal to a first preset value, and the cross-sectional area of the minimum air passage from the first air channel to the first mixing chamber is within a first set range; For the second preset corresponding relationship, the cross-sectional area of the minimum liquid passage from the second liquid channel to the second mixing chamber is less than or equal to a second preset value, and the cross-sectional area of the minimum air passage from the second air channel to the second mixing chamber is within a second set range; the first preset value is more than three times the second preset value, and the first set range partially overlaps with the second set range.

17. The emulsifying device according to claim 14, wherein, The emulsifying device obtains the steam flow by connecting to a beverage machine. The conversion device includes a control valve, and the control valve is arranged on the beverage machine. The beverage machine is provided with a first steam interface and a second steam interface connected to the control valve. The first steam channel is connected to the first steam interface, the second steam channel is connected to the second steam interface, and the operation part is configured as an operation key or an operation panel of the beverage machine.

18. The emulsifying device according to claim 14, characterized in that, A first one-way valve is arranged in the first steam channel, and a second one-way valve is arranged in the second steam channel. The first one-way valve allows opening along the direction of steam flowing into the first mixing chamber, and the second one-way valve allows opening along the direction of steam flowing into the second mixing chamber.

19. The emulsifying device according to claim 14, wherein The Venturi structure includes a main body part and a pipe connector. The pipe connector includes a connecting channel. The main body part extends into the connecting channel. The outlet channel is arranged on the pipe connector. A locking part is arranged between the main body part and the pipe connector. The locking part can be operably moved between two positions to allow and restrict the separation of the main body part from the pipe connector along the extension direction of the connecting channel.

20. The emulsifying device according to claim 1, wherein The Venturi structure includes a hollow body forming the at least one mixing chamber. The conversion device includes a first conversion member connecting the liquid passage. The first conversion member moves relative to the hollow body to change the cross-sectional area of the minimum liquid passage opening of the liquid passage. The emulsifying device further includes a second conversion member connecting the air passage. The second conversion member is connected to an air intake amount adjusting portion. The second conversion member moves relative to the hollow body to change the cross-sectional area of the minimum air passage opening of the air passage. The operation portion drives the first conversion member to move between a first milk foam gear and a second milk foam gear. The air intake amount adjusting portion drives the second conversion member to move within an indication range corresponding to the first milk foam gear and the second milk foam gear.

21. A beverage machine, characterized in that, The emulsifying device includes the emulsifying device according to any one of claims 1 to 20, and a steam passage of the emulsifying device is communicated with the beverage machine.

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