Milk foam preparation device

Abstract

The invention discloses a milk foam preparation device, and relates to the field of milk foam preparation, the milk foam preparation device comprises a stator shell, a stator body, a rotor shell, a rotor body, an end cover, a first peristaltic stirring mechanism and a second peristaltic stirring mechanism, the upper part of the stator shell is of an open structure, the end cover is detachably mounted on the upper part of the stator shell, and an inlet is formed in the end cover; the lower part of the stator shell is provided with an outlet, and the stator body is embedded in the stator shell; the rotor shell is arranged between the end cover and the stator shell, the rotor body is embedded in the rotor shell, the upper end and the lower end of the rotor body are rotationally installed on the end cover and the stator shell respectively, and gaps exist between the side portion and the bottom of the rotor shell and between the side portion and the bottom of the stator shell. The first peristaltic stirring mechanism is arranged on the lower surface of the end cover, and the second peristaltic stirring mechanism is arranged on the upper surface of the rotor shell. According to the device, the preparation effect is not affected by manual operation, milk liquid is stirred in a peristaltic mode, and obtained milk foam is finer and more dense and better in taste.

Description

Technical Field

[0001] The invention relates to the field of milk foam preparation, and in particular to a milk foam preparation device. Background Art

[0002] The existing milk froth preparation device has an external stirrer, including a motor and a stirring rod connected to the power output shaft of the motor. The milk froth is prepared by inserting the stirring rod into the milk and stirring. The milk is easy to overflow during the stirring process, and the stirring time needs to be manually controlled. The method of using a steam-type milk froth preparation device is easily affected by the position and angle of the steam spray. These two devices have high requirements for human operation. Different time and different techniques have a great influence on the effect of the milk froth, and the taste is different. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a milk foam preparation device, which is not affected by human operation and can make the milk liquid peristaltic stirred, so that the obtained milk foam is more delicate and dense and has a better taste.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a milk froth preparation device, comprising a stator shell, a stator body, a rotor shell, a rotor body, an end cover, a first peristaltic stirring mechanism, and a second peristaltic stirring mechanism, wherein the upper portion of the stator shell is an open structure, the end cover can be detachably mounted on the upper portion of the stator shell, the end cover is provided with an inlet, the lower portion of the stator shell is provided with an outlet, the stator body is embedded in the stator shell; the rotor shell is arranged between the end cover and the stator shell, the rotor body is embedded in the rotor shell, and the upper and lower ends of the rotor body are rotatably mounted on the end cover and the stator shell respectively, and there are gaps between the side and bottom of the rotor shell and the side and bottom of the stator shell; the first peristaltic stirring mechanism is arranged at The lower surface of the end cover, the second peristaltic stirring mechanism is arranged on the upper surface of the rotor shell, the first peristaltic stirring mechanism includes a plurality of first rings which are sequentially spaced from the outside to the inside, the lower part of each of the first rings is sequentially provided with a plurality of first channels along the circumferential direction, and each of the first channels runs through the inner and outer sides of the first ring, the second peristaltic stirring mechanism includes a plurality of second rings which are sequentially spaced from the outside to the inside, the upper part of each of the second rings is sequentially provided with a plurality of second channels along the circumferential direction, and each of the second channels runs through the inner and outer sides of the second ring, an annular groove is formed between any two adjacent second rings, each of the first rings is inserted into an annular groove, and there is a gap between each of the first rings and the two adjacent second rings.

[0006] Preferably, a central ring is provided in the middle of the lower surface of the end cover, an opening is provided on one side of the central ring, the inlet is connected to the central ring, and the inlet is provided on a side away from the opening.

[0007] Preferably, a central protrusion is provided in the middle of the upper surface of the rotor housing, the central protrusion extends into the central circular ring, and there is a gap between the central protrusion and the central circular ring.

[0008] Preferably, the cross-sectional area of ​​the first channel increases from the inside to the outside, and both side surfaces of the first channel are inclined toward one side relative to the radial direction of the end cover; the cross-sectional areas of the second channels on the second circular rings other than the outermost second circular ring increase from the inside to the outside, and both side surfaces of the second channels on the second circular rings other than the outermost second circular ring are inclined toward the other side relative to the radial direction of the rotor housing.

[0009] Preferably, the rotor body includes a rotor core, a center axis and a plurality of magnets, the center axis is fixed at the center of the rotor core, a plurality of positioning grooves are sequentially arranged on the outer side of the rotor core along the circumferential direction, and a magnet is arranged in each of the positioning grooves, the rotor core, the center axis and the plurality of magnets are all embedded in the rotor housing, the upper and lower ends of the center axis respectively pass through the upper and lower ends of the rotor housing, and are respectively rotatably mounted on the end cover and the stator housing.

[0010] Preferably, the upper end of the central shaft is rotatably mounted on the end cover via a first bearing, and the lower end of the central shaft is rotatably mounted on the stator housing via a second bearing.

[0011] Preferably, the stator body comprises a stator core, an upper bobbin, a lower bobbin, a terminal and a plurality of coils, the upper bobbin, the stator core and the lower bobbin are arranged in sequence from top to bottom, the interior of the stator core has a plurality of protrusions arranged in sequence along the circumferential direction, the interior of the lower end of the upper bobbin is provided with a plurality of upper plug-in parts in sequence along the circumferential direction, each of the upper plug-in parts is sleeved on the upper part of one of the protrusions, the interior of the upper end of the lower bobbin is provided with a plurality of lower plug-in parts in the circumferential direction, each of the lower plug-in parts is sleeved on the lower part of one of the protrusions, each of the upper plug-in parts and the lower plug-in parts is wound with one of the coils, the plurality of protrusions, the plurality of upper plug-in parts, the plurality of lower plug-in parts and the plurality of coils are embedded in the annular side wall of the stator housing, the terminal is arranged on the outside of the annular side wall of the stator housing, and the plurality of coils are connected to the terminal.

[0012] Preferably, the end cover is a circular plate-shaped structure, and the annular side wall of the stator housing is a cylindrical structure; an annular mounting groove is provided on the outer side of the end cover, a sealing ring is provided in the annular mounting groove, the sealing ring is located between the outer side of the end cover and the inner side of the annular side wall of the stator housing, and a plurality of clamping plates are provided in sequence along the circumferential direction on the outer side of the top of the end cover; an outer side of the upper part of the stator housing is provided with an extension annular plate, a top cylinder is provided on the outer side of the extension annular plate, and a plurality of clamping parts are provided in sequence along the circumferential direction on the upper part of the extension annular plate, and the clamping parts include a top plate and a baffle plate provided at the lower part of one side of the top plate, the outer side of the top plate is connected to the inner side of the top cylinder, the lower part of the baffle plate is connected to the extension annular plate, a clamping groove is formed between each of the top plates and each of the baffle plates and the extension annular plate and the top cylinder, and each of the clamping plates is used to be clamped in one of the clamping grooves.

[0013] Preferably, the inlet is connected to a feed nozzle, and the outlet is connected to a discharge nozzle.

[0014] Preferably, the end cover, the stator housing and the rotor housing are all made of food-grade plastic; the feed nozzle and the discharge nozzle are both made of food-grade stainless steel.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The stator body of the milk froth preparation device of the present invention is embedded in the stator shell, the rotor shell is arranged between the end cover and the stator shell, the rotor body is embedded in the rotor shell, and the upper and lower ends of the rotor body are rotatably mounted on the end cover and the stator shell respectively, there are gaps between the side and bottom of the rotor shell and the side and bottom of the stator shell, the first peristaltic stirring mechanism is arranged on the lower surface of the end cover, and the second peristaltic stirring mechanism is arranged on the upper surface of the rotor shell. During operation, milk is introduced from the inlet, and the stator body is energized to generate a magnetic field, so that the rotor body rotates, thereby driving the rotor shell and the second peristaltic stirring mechanism to rotate. The second peristaltic stirring mechanism and the first peristaltic stirring mechanism are one moving and one static, and the milk is fully stirred to prepare milk foam. At the same time, the milk in the present invention enters the interior of the milk foam preparation device for stirring and preparation. There is no problem of milk easily overflowing during the stirring process when an external stirrer is used, and there is no problem of being easily affected by the position and angle of the steam injection when a steam-type milk foam preparation device is used. The preparation effect is not affected by human operation, and the milk is peristaltically stirred, so that the obtained milk foam is more delicate and dense, and has a better taste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of the milk foam preparation device provided by the present invention;

[0019] Figure 2 A cross-sectional view of the milk froth preparation device provided by the present invention;

[0020] Figure 3 An exploded view of the milk froth preparation device provided by the present invention;

[0021] Figure 4 A three-dimensional structural diagram of a rotor housing, a rotor body and a second peristaltic stirring mechanism in the milk froth preparation device provided by the present invention;

[0022] Figure 5 A top view of a rotor housing, a rotor body and a second peristaltic stirring mechanism in the milk froth making device provided by the present invention;

[0023] Figure 6 A first three-dimensional structural diagram of an end cover and a first peristaltic stirring mechanism in the milk froth preparation device provided by the present invention;

[0024] Figure 7 A bottom view of the end cover and the first peristaltic stirring mechanism in the milk froth making device provided by the present invention;

[0025] Figure 8 A second three-dimensional structural diagram of the end cover and the first peristaltic stirring mechanism in the milk froth preparation device provided by the present invention;

[0026] Fig. 9 A three-dimensional structural diagram of a stator housing and a stator body in the milk froth preparation device provided by the present invention;

[0027] Fig.10 A schematic structural diagram of a stator core in the milk foam making device provided by the present invention;

[0028] Fig.11 A schematic structural diagram of an upper wire frame in a milk froth preparation device provided by the present invention;

[0029] Fig.12 This is a schematic structural diagram of a lower line frame in the milk froth preparation device provided by the present invention.

[0030] Explanation of reference numerals: 100, milk foam preparation device; 1, stator housing; 2, stator core; 3, protrusion; 4, upper wire rack; 5, upper plug-in portion; 6, lower wire rack; 7, lower plug-in portion; 8, coil; 9, terminal; 10, lead assembly; 11, epitaxial ring plate; 12, top cylinder; 13, top plate; 14, baffle; 15, outlet; 16, discharge nozzle; 17, end cover; 18, clamping plate; 19, cutting portion; 20, inlet; 21, feed nozzle; 22, center ring; 23, opening; 24, first ring; 25, first channel; 26, rotor housing; 27, center protrusion; 28, rotor core; 29, magnetic steel; 30, center axis; 31, first bearing; 32, second bearing; 33, second ring; 34, second channel; 35, sealing ring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The purpose of the present invention is to provide a milk foam preparation device, which does not affect the preparation effect due to human operation, enables the milk liquid to peristaltically stir, and the obtained milk foam is more delicate and dense, and has a better taste.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1-Figure 12As shown, this embodiment provides a milk foam preparation device 100, including a stator housing 1, a stator body, a rotor housing 26, a rotor body, an end cover 17, a first peristaltic stirring mechanism, and a second peristaltic stirring mechanism. The upper part of the stator housing 1 is an open structure, and the end cover 17 can be detachably installed on the upper part of the stator housing 1. The end cover 17 is provided with an inlet 20, and the lower part of the stator housing 1 is provided with an outlet 15. The stator body is embedded in the stator housing 1; the rotor housing 26 is arranged between the end cover 17 and the stator housing 1, and the rotor body is embedded in the rotor housing 26, and the upper and lower ends of the rotor body are rotatably installed on the end cover 17 and the stator housing 1 respectively, and there are gaps between the side and bottom of the rotor housing 26 and the side and bottom of the stator housing 1; the first peristaltic stirring mechanism is arranged on the lower surface of the end cover 17, and the second peristaltic stirring mechanism is arranged on the rotor housing 26. On the upper surface of the shell 26, the first peristaltic stirring mechanism includes a plurality of first circular rings 24 which are sequentially spaced from the outside to the inside, a plurality of first channels 25 are sequentially arranged in the circumferential direction at the lower portion of each first circular ring 24, each first channel 25 passes through the inner and outer sides of the first circular ring 24, and each first channel 25 passes through the bottom of the first circular ring 24; the second peristaltic stirring mechanism includes a plurality of second circular rings 33 which are sequentially spaced from the outside to the inside, a plurality of second channels 34 are sequentially arranged in the circumferential direction at the upper portion of each second circular ring 33, each second channel 34 passes through the inner and outer sides of the second circular ring 33, and each second channel 34 passes through the top of the second circular ring 33; an annular groove is formed between any two adjacent second circular rings 33, each first circular ring 24 is inserted into an annular groove, and there is a gap between each first circular ring 24 and the two adjacent second circular rings 33.

[0035] During operation, milk is introduced from the inlet 20, and the milk can enter between the first peristaltic stirring mechanism and the second peristaltic stirring mechanism through the inlet 20, and the stator body is energized to generate a magnetic field, so that the rotor body rotates, and then the rotor housing 26 and the second peristaltic stirring mechanism rotate. The second peristaltic stirring mechanism and the first peristaltic stirring mechanism are in motion and static mode, and the milk is fully stirred to produce milk foam. The formed milk foam enters the outlet 15 through the gap between the side and bottom of the rotor housing 26 and the side and bottom of the stator housing 1 and is discharged to the outside. At the same time, the milk in this embodiment enters the interior of the milk foam preparation device 100 for stirring and preparation, and there is no problem of milk easily overflowing during stirring when an external stirrer is used, and there is no problem of being easily affected by the position and angle of the steam spray when the steam type milk foam preparation device 100 is used. The preparation effect is not affected by human operation, and the milk is peristaltically stirred, and the obtained milk foam is more delicate and dense, and the taste is better.

[0036] like Figure 6 and Figure 7As shown, a central ring 22 is provided in the middle of the lower surface of the end cover 17 , an opening 23 is provided on one side of the central ring 22 , an inlet 20 is connected to the central ring 22 , and the inlet 20 is provided on a side away from the opening 23 .

[0037] like Figure 4 and Figure 5 As shown, a central protrusion 27 is provided in the middle of the upper surface of the rotor housing 26 . The central protrusion 27 extends into the central circular ring 22 , and a gap exists between the central protrusion 27 and the central circular ring 22 .

[0038] The central ring 22 is provided so that the milk enters from the inlet 20 and gathers at the center, and then is discharged from the bottom of the central ring 22 and the opening 23. The central protrusion 27 is provided so that the milk is fully dispersed in the gap between the central protrusion 27 and the central ring 22.

[0039] like Figure 7 As shown, the cross-sectional area of ​​the first channel 25 increases from the inside to the outside, and both side surfaces of the first channel 25 are inclined toward one side relative to the radial direction of the end cover 17. Figure 5 As shown, the cross-sectional areas of the second channels 34 on the other second circular rings 33 except the outermost second circular ring 33 increase from the inside to the outside, and both side surfaces of the second channels 34 on the other second circular rings 33 except the outermost second circular ring 33 are inclined toward the other side relative to the radial direction of the rotor housing 26.

[0040] By performing the above arrangement on the first channel 25 and the second channels 34 on the second rings 33 other than the outermost second ring 33, the milk is fully collided under the action of the first peristaltic stirring mechanism and the second peristaltic stirring mechanism, thereby improving the stirring effect.

[0041] Specifically, the first channel 25 is formed by cutting at the bottom of the first circular ring 24. The second channel 34 on the outermost second circular ring 33 is formed by cutting at the top of the second circular ring 33 and cutting to the bottom of the second circular ring 33, and the second channels 34 on the second circular rings 33 other than the outermost second circular ring 33 are formed by cutting at the top, inside and outside of the second circular ring 33.

[0042] like Figure 2 As shown, the rotor body includes a rotor core 28, a center shaft 30 and a plurality of magnets 29. The center shaft 30 is fixed at the center of the rotor core 28. A plurality of positioning grooves are sequentially arranged on the outer side of the rotor core 28 along the circumferential direction. A magnet 29 is arranged in each positioning groove. The rotor core 28, the center shaft 30 and the plurality of magnets 29 are all embedded in the rotor housing 26. The upper and lower ends of the center shaft 30 respectively pass through the upper and lower ends of the rotor housing 26 and are rotatably mounted on the end cover 17 and the stator housing 1 respectively.

[0043] Specifically, the upper end of the central shaft 30 is rotatably mounted on the end cover 17 via a first bearing 31 , and the lower end of the central shaft 30 is rotatably mounted on the stator housing 1 via a second bearing 32 , thereby allowing the central shaft 30 to rotate smoothly.

[0044] In this specific embodiment, the first bearing 31 and the second bearing 32 are both plastic bearings.

[0045] like Figure 2 and Figure 10-12 As shown, the stator body includes a stator core 2, an upper bobbin 4, a lower bobbin 6, a terminal 9 and a plurality of coils 8. The upper bobbin 4, the stator core 2 and the lower bobbin 6 are arranged in sequence from top to bottom. The interior of the stator core 2 has a plurality of protrusions 3 arranged in sequence along the circumferential direction. The interior of the lower end of the upper bobbin 4 is provided with a plurality of upper plug-in portions 5 in sequence along the circumferential direction. Each upper plug-in portion 5 is sleeved on the upper portion of a protrusion 3. The interior of the upper end of the lower bobbin 6 is provided with a plurality of lower plug-in portions 7 in the circumferential direction. Each lower plug-in portion 7 is sleeved on the lower portion of a protrusion 3. A coil 8 is wound around each upper plug-in portion 5 and each lower plug-in portion 7. The plurality of protrusions 3, the plurality of upper plug-in portions 5, the plurality of lower plug-in portions 7 and the plurality of coils 8 are all embedded in the annular side wall of the stator housing 1. The terminal 9 is arranged on the outside of the annular side wall of the stator housing 1. The plurality of coils 8 are all connected to the terminal 9. The terminal 9 is used to be connected to the lead assembly 10. The coil 8 in this embodiment is made of enameled wire.

[0046] The end cover 17 is a disc-shaped structure, the annular side wall of the stator housing 1 is a cylindrical structure, and the bottom of the stator housing 1 is a disc-shaped structure; an annular mounting groove is provided on the outer side of the end cover 17, and a sealing ring 35 is provided in the annular mounting groove. The sealing ring 35 is located between the outer side of the end cover 17 and the inner side wall of the annular side wall of the stator housing 1, thereby achieving a seal between the end cover 17 and the stator to prevent milk from leaking out. A plurality of clamping plates 18 are sequentially provided on the outer side of the top of the end cover 17 along the circumferential direction. Fig. 9 As shown, an outer side of the upper part of the stator housing 1 is provided with an outer circular ring plate 11, and a top cylinder 12 is provided on the outer side of the outer circular ring plate 11. A plurality of clamping components are sequentially provided on the upper part of the outer circular ring plate 11 along the circumferential direction, and the clamping components include a top plate 13 and a baffle 14 arranged at the lower part of one side of the top plate 13. The outer side of the top plate 13 is connected to the inside of the top cylinder 12, and the lower part of the baffle 14 is connected to the outer circular ring plate 11. A clamping groove is formed between each top plate 13 and each baffle 14 and the outer circular ring plate 11 and the top cylinder 12, and each clamping plate 18 is used to be clamped in a clamping groove.

[0047] When the end cover 17 is in the installed state, each clamping plate 18 is clamped in a clamping slot. When the end cover 17 needs to be disassembled, each clamping plate 18 is rotated toward the side away from the clamping slot so that each clamping plate 18 is separated from the clamping slot, and then the end cover 17 can be disassembled, thereby facilitating the cleaning of the first peristaltic stirring mechanism and the second peristaltic stirring mechanism.

[0048] In order to facilitate the insertion of the card plate 18 into the card slot, a cutting portion 19 is provided at the upper portion of one end of each card plate 18 close to the corresponding card slot.

[0049] In order to facilitate the connection of the milk to the liquid inlet pipe, a feed nozzle 21 is connected to the inlet 20, and the feed nozzle 21 is used to connect to the liquid inlet pipe. A discharge nozzle 16 is connected to the outlet 15, and the discharge nozzle 16 is provided to facilitate the discharge of milk foam to the outside.

[0050] In this specific embodiment, the end cover 17, the stator housing 1 and the rotor housing 26 are all made of food-grade plastic material, that is, in this embodiment, the stator housing 1 is used to plastic-encapsulate the stator body, and the rotor housing 26 is used to plastic-encapsulate the rotor body. The feed nozzle 21 and the discharge nozzle 16 are both made of food-grade stainless steel.

[0051] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A milk froth preparation device, characterized in that: The invention comprises a stator shell, a stator body, a rotor shell, a rotor body, an end cover, a first peristaltic stirring mechanism and a second peristaltic stirring mechanism, wherein the upper part of the stator shell is an open structure, the end cover can be detachably installed on the upper part of the stator shell, the end cover is provided with an inlet, the lower part of the stator shell is provided with an outlet, the stator body is embedded in the stator shell; the rotor shell is arranged between the end cover and the stator shell, the rotor body is embedded in the rotor shell, and the upper and lower ends of the rotor body are rotatably installed on the end cover and the stator shell respectively, and there are gaps between the side and bottom of the rotor shell and the side and bottom of the stator shell; the first peristaltic stirring mechanism is arranged on the lower surface of the end cover The second peristaltic stirring mechanism is arranged on the upper surface of the rotor shell, the first peristaltic stirring mechanism includes a plurality of first circular rings which are sequentially spaced from the outside to the inside, a plurality of first channels are sequentially arranged at the lower part of each of the first circular rings along the circumferential direction, and each of the first channels runs through the inner and outer sides of the first circular ring, the second peristaltic stirring mechanism includes a plurality of second circular rings which are sequentially spaced from the outside to the inside, a plurality of second channels are sequentially arranged at the upper part of each of the second circular rings along the circumferential direction, and each of the second channels runs through the inner and outer sides of the second circular ring, an annular groove is formed between any two adjacent second circular rings, each of the first circular rings is inserted into an annular groove, and there is a gap between each of the first circular rings and the two adjacent second circular rings.

2. The milk froth preparation device according to claim 1, characterized in that: A central circular ring is arranged in the middle of the lower surface of the end cover, an opening is arranged on one side of the central circular ring, the inlet is connected with the central circular ring, and the inlet is arranged on a side away from the opening.

3. The milk froth preparation device according to claim 2, characterized in that: A central protrusion is provided in the middle of the upper surface of the rotor housing. The central protrusion extends into the central circular ring, and a gap exists between the central protrusion and the central circular ring.

4. The milk froth preparation device according to claim 1, characterized in that: The cross-sectional area of ​​the first channel increases from the inside to the outside, and the two side surfaces of the first channel are inclined toward one side relative to the radial direction of the end cover; the cross-sectional areas of the second channels on the other second circular rings except the outermost second circular ring increase from the inside to the outside, and the two side surfaces of the second channels on the other second circular rings except the outermost second circular ring are inclined toward the other side relative to the radial direction of the rotor housing.

5. The milk froth preparation device according to claim 1, characterized in that: The rotor body includes a rotor core, a center axis and a plurality of magnets, wherein the center axis is fixed at the center of the rotor core, a plurality of positioning grooves are sequentially arranged along the circumferential direction on the outer side of the rotor core, and a magnet is arranged in each of the positioning grooves, the rotor core, the center axis and the plurality of magnets are all embedded in the rotor housing, and the upper and lower ends of the center axis respectively pass through the upper and lower ends of the rotor housing, and are respectively rotatably mounted on the end cover and the stator housing.

6. The milk froth preparation device according to claim 5, characterized in that: The upper end of the central shaft is rotatably mounted on the end cover via a first bearing, and the lower end of the central shaft is rotatably mounted on the stator housing via a second bearing.

7. The milk froth preparation device according to claim 1, characterized in that: The stator body comprises a stator core, an upper bobbin, a lower bobbin, a terminal and a plurality of coils, wherein the upper bobbin, the stator core and the lower bobbin are arranged in sequence from top to bottom, the interior of the stator core comprises a plurality of protrusions arranged in sequence along the circumferential direction, the interior of the lower end of the upper bobbin is provided with a plurality of upper plug-in parts in sequence along the circumferential direction, each of the upper plug-in parts is sleeved on the upper part of one of the protrusions, the interior of the upper end of the lower bobbin is provided with a plurality of lower plug-in parts in the circumferential direction, each of the lower plug-in parts is sleeved on the lower part of one of the protrusions, each of the upper plug-in parts and the lower plug-in parts is wound with one of the coils, the plurality of protrusions, the plurality of upper plug-in parts, the plurality of lower plug-in parts and the plurality of coils are embedded in the annular side wall of the stator housing, the terminal is arranged on the outside of the annular side wall of the stator housing, and the plurality of coils are connected to the terminal.

8. The milk froth preparation device according to claim 1, characterized in that: The end cover is a circular plate-shaped structure, and the annular side wall of the stator housing is a cylindrical structure; an annular mounting groove is provided on the outer side of the end cover, and a sealing ring is provided in the annular mounting groove, and the sealing ring is located between the outer side of the end cover and the inner side of the annular side wall of the stator housing, and a plurality of clamping plates are sequentially provided on the outer side of the top of the end cover along the circumferential direction; an outer side of the upper part of the stator housing is provided with an extension circular ring plate, and a top cylinder is provided on the outer side of the extension circular ring plate, and a plurality of clamping parts are sequentially provided on the upper part of the extension circular ring plate along the circumferential direction, and the clamping parts include a top plate and a baffle plate provided at the lower part of one side of the top plate, the outer side of the top plate is connected to the inner side of the top cylinder, and the lower part of the baffle plate is connected to the extension circular ring plate, and a clamping groove is formed between each of the top plates and each of the baffle plates and the extension circular ring plate and the top cylinder, and each of the clamping plates is used to be clamped in one of the clamping grooves.

9. The milk froth making device according to claim 1, characterized in that: The inlet is connected with a feed nozzle, and the outlet is connected with a discharge nozzle.

10. The milk froth preparation device according to claim 9, characterized in that: The end cover, the stator housing and the rotor housing are all made of food-grade plastic; the feed nozzle and the discharge nozzle are both made of food-grade stainless steel.

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