Automatic foamer for micro-foaming a liquid and impeller thereof, and impeller for automatic micro-foaming

Abstract

An automatic foamer for microfoaming a liquid and an impeller thereof, and an impeller for automatic microfoaming are disclosed. The impeller can include a base, a coupling device for coupling the base to a motor, a support wall extending upwardly from the base, a blade extending upwardly from the support wall, a shroud disposed about the blade, and a screen coupled to the shroud. The support wall is curved inwardly toward a central axis of the base. The support wall defines a channel, wherein the support wall and the base define an outlet in communication with the channel. The blade extends along the support wall. The blade defines an inlet in fluid communication with the channel. The shroud includes a ring and a wall extending downwardly from the ring. The wall of the shroud engages the support wall. The coupling device can include a first set of magnets disposed about the impeller, and a second set of magnets disposed about the motor.

Description

Technical Field

[0001] This disclosure relates to the field of kitchen equipment technology, and specifically to an impeller for automatic micro-bubbling in coffee machines. Background Technology

[0002] This disclosure generally relates to a tool for preparing milk or milk substitutes for espresso or cocoa beverages such as cappuccino, coffee latte, and mocha.

[0003] Coffee drinks, especially milk-based ones like cappuccinos, lattes, and mochas, have long been popular. A key characteristic of these drinks is their delicate, silky milk foam on top, which experienced baristas can use to create exquisite "latte art" on the surface. In professional coffee shops, large commercial espresso machines are typically used to prepare this high-quality milk foam. These machines usually contain multiple water boilers, one of which is dedicated to generating high-temperature, high-pressure steam. The steam propelled at high speed by the steam wand not only heats the milk but also creates foam within it. Skilled baristas can further break down the bubbles in the foam, making them even smaller, forming so-called "microbubbles." These microbubbles, when mixed with espresso, contribute to the final drink's superior taste and sweetness.

[0004] However, for home coffee lovers, replicating this professional microbubble brewing process in a home environment presents many challenges. Typical home espresso machines are often less robust than commercial machines, and many small home machines don't even come with a steam boiler or steam wand, only capable of making espresso, making it impossible for users to make any form of microbubble milk at home.

[0005] To address these shortcomings, various home milk frothing devices have emerged on the market. These devices typically use small stirrs to agitate the milk, but the resulting bubbles are large, causing the milk and foam to separate quickly, forming a thick layer of foam on top and a thin layer of milk at the bottom. This foam is difficult to fully mix with espresso when poured into coffee, often resulting in flavor separation and failing to achieve the desired latte art effect. In short, traditional home handheld or automatic milk frothing devices generally cannot produce true microbubbles because they lack a mechanism to effectively break down large bubbles into a microscopic, uniform texture. Summary of the Invention

[0006] The purpose of this invention is to create a device that can generate microbubbles repeatedly, continuously and rapidly without requiring any learning skills or technology.

[0007] An exemplary embodiment of the disclosed subject matter is a novel impeller for automated microbubbling. The impeller preferably includes a base, a coupling device for connecting the base to a motor, a support wall extending upward from the base, blades extending upward from the support wall, a shroud surrounding the blades, and a screen connected to the shroud. The base has a top, an opposing bottom, and a central axis. The base is preferably generally circular and has an outer edge. A first end of the support wall extends upward from or around the outer edge. The support wall gradually curves inward toward the central axis of the base, such that a second end of the support wall extends upward from or around the central axis. The support wall defines a channel, wherein the support wall and the base define an outlet communicating with the channel.

[0008] The first end of the blade extends upward from or around the second end of the support wall. The blade extends along the support wall, and the second end of the blade extends upward from or around the first end of the support wall. The blade defines an inlet in fluid communication with the channel.

[0009] The shield preferably includes a knurled ring and a wall extending downward from the ring. The wall of the shield preferably engages with a support wall. The coupling device may include a magnet disposed around the bottom of the base for magnetically engaging the motor. Alternatively, the base may have a housing, wherein the coupling device includes a magnet surrounding the housing at the bottom of the base for magnetically engaging the motor.

[0010] Another exemplary embodiment of the novel impeller for automated microbubbling includes a generally circular base, a coupling device for connecting the base to a motor, a first curved support wall and a second curved support wall extending upward from the base, a first blade and a second blade extending upward from their respective support walls, a first outlet and a second outlet, a shroud, a screen connected to the shroud, and an inlet defined by the first blade and the second blade.

[0011] The first curved support wall preferably extends upward from the outer edge of the base and bends radially inward toward the central axis of the base. A first end of the first blade extends upward from or around the second end of the first curved support wall. A second end of the first blade extends upward from or around the first end of the first curved support wall. The second curved support wall preferably extends upward from the outer edge of the base and bends radially inward toward the central axis. A first end of the second blade extends upward from or around the second end of the second curved support wall. A second end of the second blade extends upward from or around the first end of the second curved support wall.

[0012] The first outlet is preferably defined by the base, the second end of the first curved support wall, and the first end of the first blade. The second outlet is preferably defined by the base, the second end of the second curved support wall, and the first end of the second blade.

[0013] The shield preferably has a ring and a wall extending downward from the ring. The wall of the shield is preferably located around a curved support wall.

[0014] Another exemplary embodiment of the disclosed subject matter is an automated foamer for microbubbling a liquid. The microbubbler preferably includes a vessel for containing the liquid, an impeller disposed within the vessel, and a motor for rotating the impeller. The impeller preferably has a generally circular base with an outer edge and a central axis. A first support wall extends upward from or around the outer edge of the base and curves inward toward the central axis. A first blade extends upward from the first support wall. A second support wall extends upward from or around the outer edge of the base and curves inward toward the central axis. A second blade extends upward from the second support wall.

[0015] A protective cover (with a screen attached to it) is arranged around the first and second blades. The protective cover can be fixed to a support wall. The protective cover can be knurled to aid the microfoaming process.

[0016] The inlet is defined by a first blade and a second blade, wherein the inlet contains the liquid to be micro-foamed. The first outlet is defined by a first support wall, a second support wall, and a base, wherein the first outlet allows the liquid to be ejected radially outward away from the central axis during microfoaming. The second outlet is defined by the first support wall, the second support wall, and the base, wherein the second outlet allows the liquid to be ejected radially outward away from the central axis during microfoaming.

[0017] The motor is preferably a variable speed motor, and the container includes at least one button for changing the motor power. The container may include a first container for holding the liquid to be micro-foamed. The container may also include a second container for holding the motor. The automatic foamer may also have a coupling device for detachably connecting the impeller to the motor. Attached Figure Description

[0018] The following figures illustrate some non-limiting exemplary embodiments of the disclosed subject matter. Identical or repeated, equivalent or similar structures, elements, or parts appearing in one or more figures are generally labeled with the same reference numerals, optionally with additional letters or letters to distinguish similar objects or variations thereof, and may be labeled and / or described without repetition. The dimensions of the parts and features shown in the figures are chosen for convenience or clarity of presentation. For convenience or clarity, some elements or structures are not shown or are only partially shown and / or shown from different perspectives or viewpoints.

[0019] Figure 1 This is a top perspective view of an embodiment of the impeller disclosed herein, showing the device in its operating environment prior to the impeller being coupled to the motor; Figure 2 Showing Figure 1 The impeller seen here is after it is connected to the motor; Figure 3 yes Figure 1 An exploded cross-sectional view of the impeller as seen in the image; Figure 4A yes Figure 3 Top perspective view of the impeller as seen in the image; Figure 4B yes Figure 4A An exploded view of the impeller as seen in the image; Figure 5 yes Figure 1 The impeller seen in the image is a top view without the shroud and screen. Figure 6A This is an exploded top perspective view of another embodiment of the impeller disclosed herein, wherein the shroud has knurling; Figure 6B yes Figure 6A Top perspective view of the impeller as seen in the image; Figure 6C yes Figure 6A The side view of the impeller seen in the image; and Figure 7 This is a top perspective view of an embodiment of an automatic foamer with the impeller disclosed herein, wherein the automatic foamer has a coupling device for adjusting the motor speed. Detailed Implementation

[0020] In coffee shops, you'll often see high-quality, silky milk used to prepare cappuccinos, allowing baristas to create elegant patterns on the drink known as "latte art." These shops use large commercial espresso machines containing multiple water boilers, one of which is dedicated to creating high-temperature, high-pressure steam. This steam is propelled at high speed through a steam wand to heat the milk and create foam. Experienced baristas can further break up the bubbles in the foam to create even smaller bubbles, known as microbubbles. When poured, the microbubbled milk blends with the espresso, adding a pleasant sweetness to the final drink.

[0021] While home baristas can use espresso machines with steam boilers and steam wands to create foam, creating the silky, microbubbly milk perfect for latte art is entirely different. Typical home machines are not as robust as the commercial machines found in coffee shops. Furthermore, many small home espresso machines don't include a second boiler or steam wand at all, producing only espresso, thus preventing users from creating any kind of microbubbly milk.

[0022] To address these shortcomings, milk frothing devices have been designed for home use. These devices typically use small stirrers to create bubbles of average size, causing the milk to separate almost instantly, resulting in a thick foam texture on top and milk at the bottom. When poured, the milk comes out first, followed by the foam clump. This foam clump doesn't mix well with espresso drinks, resulting in a separation of flavors between foamy milk on top and espresso at the bottom, failing to achieve the desired latte art. In short, traditional handheld or automatic milk frothing devices don't create microbubbles because they lack a mechanism to break down the bubbles into a microscopically uniform milk texture.

[0023] An alternative to traditional handheld or automatic milk frothing devices is the French press. The method involves adding hot milk to the French press and vigorously pumping the plunger up and down to create foam, then slowing the plunger's movement to submerge it until the foam is smooth. While this method may not achieve the microbubbly perfection of a skilled barista using a steam wand, it is convenient and affordable for most average home baristas.

[0024] An alternative to traditional handheld or automatic milk frothers is the microbubbling device disclosed in U.S. Patent 11,864,687, invented by the same inventor as the present invention. These devices use an impeller with a uniquely configured screen, positioned downstream of the fluid to create microbubbles. The impeller rotates at very high speeds per minute, initially agitating the milk to create ordinary foam, then adjusting its position or speed to pull the newly created foam bubbles downwards and break them down into ultrafine bubbles. In a second stage, as the milk, foam, and bubbles circulate in the vessel and pass through the impeller, the microbubbles gradually become finer until a very uniform, wet-paint-like texture is created.

[0025] To create microbubbles with a perfectly controlled foam-to-milk ratio, the impeller must remain submerged throughout the second stage. Exposing the impeller at any point during this stage can alter or ruin the quality of the milk foam. Specifically, if a deep vortex is accidentally formed and the impeller is exposed, even momentarily, more air is added to the mixture, changing the foam-to-milk ratio and unintentionally creating more foam, resulting in a thicker texture than desired. If this unintended aeration occurs around the end of the cycle, large air bubbles will enter the impeller and not be broken down, thus disrupting the smoothness of the microbubbles.

[0026] Furthermore, fluids accumulate momentum over time as they rotate, even at a constant rate. This gradual increase in momentum leads to progressively deeper vortices, which can expose the impeller, resulting in over-inflation caused by these vortices, as described above. Reducing the impeller speed eliminates the risk of accidental inflation; however, a significantly reduced speed also lacks the power to pull the bubbles downwards to convert them into microbubbles, leaving a layer of large bubbles on the surface. Therefore, excessively reducing the impeller speed to avoid accidental inflation is not a viable solution.

[0027] Therefore, the challenge lies in finding a solution that allows the impeller to rotate as fast as possible without the need for external fixed blades, baffles, or other flow control mechanisms, while preventing the formation of deep vortices.

[0028] Therefore, a new type of impeller and an automated foaming device using this new impeller are needed to solve these and other problems.

[0029] The following is a non-limiting overview of implementations of this disclosure. This overview provides exemplary practices of embodiments of this disclosure and offers a constructive basis for variations and / or alternatives and / or different embodiments, some of which are described subsequently.

[0030] Figure 1-7 An impeller 100 for automatically foaming liquids (such as milk or milk substitutes) is shown. The impeller 100 is preferably coupled to a motor 110, both of which can be held in a rod-like manner. The impeller 100 may be contained in a vessel (such as a water jug ​​or kettle), and the motor 110 may be located outside the water jug ​​or kettle. Figure 1 The illustrated vessel 202 has a bottom wall 204 and a side wall 206 extending upward from the bottom wall 204. The vessel 202 may have a handle 208 attached to and extending from the side wall 206 of the vessel 202. The vessel 202 preferably has a first container 210 with its bottom wall 212 and a second container 214. Figure 7 A preferred automatic foamer 200 is shown in particular, wherein the vessel 202 may have one or more buttons 216 for changing the power of the motor 110. The motor 110 is preferably a variable speed motor, wherein a user of the automatic foamer 200 can press button 216 to change the speed of the motor 110, such as... Figure 7 The mark 218 is shown on the side wall 206 of the middle vessel 202.

[0031] Details of the steering impeller 100 preferably include a base 102, a connecting device 108 for connecting the base 102 to the motor 110, a support wall 112 extending upward from the base 102, blades 126 extending upward from the support wall 112, a shroud 134 disposed around the blades 126, and a screen 142 connected to the shroud 134.

[0032] Reference Figure 6A The base 102 has a top 104, an opposite bottom 106, a central axis 124, and an outer edge 125.

[0033] The coupling device 108 for connection may include the use of magnets, friction fit, one or more pins or the like, direct mounting, and similar arrangements. For detailed description of direct mounting, the impeller 100 may be secured to a motor shaft protruding through the bottom wall 204 of the vessel 202. Regarding the friction fit arrangement, the base 102 may have a housing (such as housing 144), and the motor 110 may have a shaft or arm 146 extending therefrom, wherein the housing 144 is adapted to receive and accommodate the arm 146 and hold it in place by friction. Regarding the use of magnets, one arrangement includes magnets concentrically arranged around the impeller, and another set of magnets radially arranged along the motor shaft. Figure 3 As best seen, the coupling device 108 for connection preferably includes a base 102 having a housing 144 adapted to accommodate the arm 146 of the motor 110, a first set of magnets 145 disposed around the housing 144 in the base 102, and a second set of matching / opposing magnets 147 in the motor arm 146. An air gap between the two magnets 145, 147 allows the coupling device 108 for connection to operate through the vessel 202 and prevents leakage.

[0034] like Figure 5 and 6A As best seen in -6B, support wall 112 has a first end 114 and a second end 116. Support wall 112 defines a channel 118, wherein support wall 112 and base 102 define an outlet 132 communicating with the channel. Blade 126 extending upward from the top of support wall defines an inlet 140 in fluid communication with channel 118.

[0035] The impeller 100 preferably includes at least two support walls and blades. Since the impeller 100 is preferably miniaturized, using fewer blades means that each blade can be made larger and stronger. Figure 5An impeller 100 for microbubbling liquids may include a generally circular base 102 having an outer edge 125 and a central axis 124. A first curved support wall 112 (with a first end 114 and a second end 116) extends its first end 114 upward from the outer edge 125. The first curved support wall 112 is radially inwardly curved toward the central axis 124 of the base 102. A first blade 126 (with a first end 128 and a second end 130) extends its first end 128 upward from or around the second end 116 of the first curved support wall 112. The second end 130 of the first blade 126 extends upward from or around the first end 114 of the first curved support wall 112. A second curved support wall 148 has a first end 150 and a second end 152, wherein the first end 150 extends upward from the outer edge 125 of the base 102. The second curved support wall 148 is also radially inward toward the central axis 125 of the base 102. A second blade 154 (with a first end 156 and a second end 158) extends upward from the top of the second curved support wall 148. Specifically, the first end 156 of the second blade 154 extends upward from or around the second end 152 of the second curved support wall 148. The second end 158 of the second blade 154 extends upward from or around the first end 150 of the second curved support wall 148.

[0036] With this arrangement, the first outlet 132 is defined by the base 102, the second end 116 of the first curved support wall 112, and the first end 128 of the first blade 126. A second outlet 160 is also defined by the base 102, the second end 152 of the second curved support wall 148, and the first end 156 of the second blade 154. The inlet 140 is defined by the first blade 126 and the second blade 154.

[0037] The first blade 126 and the second blade 154 are preferably designed to bend at a minimal angle to minimize fluid resistance, thereby allowing the impeller 100 to rotate at impressive speeds. The blades 126 and 154 are preferably designed to guide fluid radially to the outer edge 125 of the base 102 of the impeller 100.

[0038] The protective cover 134 (which can be detachably attached or secured to the base 102) preferably includes a ring 136 having a wall 138 extending downward from the wall 138. For example... Figures 6A-6C As shown, the ring can have knurled 139 to aid the microfoaming process. (As...) Figure 3As best seen, the wall 138 of the shroud 134 is configured to sit atop each of the first curved support walls 112 and the second curved support walls 148. In this way, the shroud 134 (with its screen 142) covers the inlet 140 and is also positioned above each of the curved blades 126, 154. The position of the screen 142 and the annular structure of the shroud 134 increase the efficiency of the impeller 100. In fact, the disclosed impeller 100 allows for the creation of a very small diameter. A small diameter allows for very high rotation speeds in the liquid while using less power. Furthermore, a small-diameter impeller has less contact / friction with the liquid and generates smaller vortices, while a large-diameter impeller tends to gradually increase the momentum of the rotating liquid and eventually create deep vortices. Finally, compared to a slowly rotating screen 142, a small-diameter impeller allows a faster-rotating screen 142 to break up large bubbles in the liquid more quickly and effectively.

[0039] During operation, the user of impeller 100 may first wish to clean it. To do this, the user can pull the cover 134 off the base 102 to remove it from the support walls 112, 148, thus easily cleaning the device 100. After cleaning, the user places the impeller 100 on the arm 146 of the motor 110. As the motor 110 rotates the impeller 100, magnets 145, 147 help hold the impeller 100 in the proper position within the container 202.

[0040] Next, the user pours the liquid to be micro-foamed into container 202. This liquid can be milk or a milk-based substitute, and may have varying degrees of viscosity and other properties. While the exact amount of liquid may vary depending on user preference, the user pours enough liquid to cover impeller 100. Once covered, the user turns on manufacturing 200 and presses button 216 to change the power output of motor 110.

[0041] In the first stage, the motor 110 rotates the impeller 100 extremely rapidly, creating a deep vortex and exposing the impeller 100 to ambient air. This semi-exposed impeller 100 agitates the liquid (preferably milk) and creates bubbles.

[0042] In the second stage, impeller 100 slows down to reduce the size of the vortex and allows impeller 100 to rotate fully submerged. During this stage, no additional foam is created because impeller 100 is not in contact with air. In this submerged stage, the impeller pulls milk downwards through inlet 140 of impeller 100, forcing the milk and bubbles through a rapidly rotating screen 142. As the milk passes through screen 142, the bubbles are broken into very fine bubbles and ejected laterally through outlets 132 and 160. Recirculation and periodic execution of this process ultimately create a very fine, uniform microbubble texture.

[0043] It should now be apparent that even inexperienced baristas can use the disclosed impeller and automatic frother to create perfect microbubbles. Furthermore, it should be readily understood by those skilled in the art that the novel impeller solves the problems of (1) over-aeration caused by vortices and conversely (2) insufficient speed (which introduces large bubbles in the second stage, thus ruining the smoothness of the microbubbles). Specifically, because the screen 142 covers the inlet 140 of the impeller 100, the impeller advantageously rotates as fast as possible while preventing the formation of deep vortices without the use of external fixed blades, baffles, or other flow control mechanisms. The specific screen-inlet arrangement allows some milk to flow through the channel 118, while the remaining milk flows over the top of the impeller 100 and is recirculated. It is this portion of milk flowing through the impeller 100 that helps to seal vortices and prevent aeration, even at high rotation speeds. With the disclosed arrangement, the user now has the advantage of a high-speed impeller that pulls down the milk and bubbles, cuts the bubbles through the fine mesh of the screen, and recirculates the foam, while effectively controlling the vortex depth to avoid accidental aeration.

[0044] While certain embodiments have been described, these embodiments are presented by way of example only and are not intended to limit the scope of the invention. In fact, the novel impeller and automatic bubbler described herein can be implemented in various other forms. Furthermore, various omissions, substitutions, and changes can be made to the form of the disclosed elements without departing from the spirit of the invention. The appended claims and their equivalents are intended to cover these forms or modifications that fall within the scope and spirit of the invention.

Claims

1. An impeller for automated microbubbling, characterized in that, include: The base has a top, an opposite bottom, and a central axis; A connecting device for connecting the bottom of the base to the motor; A support wall extends upward from the top of the base, the support wall defining a channel, wherein the support wall and the base define an outlet communicating with the channel; Blades, extending upward from the support wall, define an inlet in fluid communication with the channel; A protective cover is provided around the blade; as well as A screen is attached to the protective cover.

2. The impeller for automated microbubbling according to claim 1, characterized in that, The base is generally circular and has an outer edge. The support wall has a first end and an opposite second end. The first end of the support wall extends upward from or around the outer edge, and the support wall gradually bends inward toward the central axis of the base. The second end of the support wall extends upward from or around the central axis.

3. The impeller for automated microbubbling according to claim 2, characterized in that, The blade has a first end and an opposite second end, wherein the first end of the blade extends upward from or around the second end of the support wall, and wherein the blade extends along the support wall, and the second end of the blade extends upward from or around the first end of the support wall.

4. The impeller for automated microbubbling according to claim 3, characterized in that, The shield includes a ring and a wall extending downward from the ring, wherein the wall of the shield engages the support wall.

5. The impeller according to claim 1, characterized in that, The coupling device includes a magnet disposed around the bottom of the base for magnetically engaging the motor.

6. The impeller for automated microbubbling according to claim 1, characterized in that, The base has a housing, and the coupling device includes a magnet located around the housing at the bottom of the base for magnetically engaging the motor.

7. The impeller for automated microbubbling according to claim 1, characterized in that, The cover has knurling, and the cover is adapted to engage with the support wall.

8. An impeller for micro-foaming liquids, characterized in that, include: A roughly circular base with an outer edge and a central axis; A connecting device for connecting the base to the motor; A first curved support wall has a first end and a second end, wherein the first end of the first curved support wall extends upward from the outer edge of the base, and wherein the first curved support wall is radially inward toward the central axis of the base; A first blade has a first end and a second end, wherein the first end of the first blade extends upward from or around the second end of the first curved support wall, and wherein the second end of the first blade extends upward from or around the first end of the first curved support wall. The second curved support wall has a first end and a second end, wherein the first end of the second curved support wall extends upward from the outer edge of the base, and wherein the second curved support wall is radially inward toward the central axis of the base; The second blade has a first end and a second end, wherein the first end of the second blade extends upward from or around the second end of the second curved support wall, and wherein the second end of the second blade extends upward from or around the first end of the second curved support wall. The first outlet is defined by the base, the second end of the first curved support wall, and the first end of the first blade; The second outlet is defined by the base, the second end of the second curved support wall, and the first end of the second blade; A protective cover having a ring and a wall extending downward from the ring, wherein the wall of the protective cover is located around the first curved support wall and the second curved support wall; A screen, connected to the protective cover; and The inlet is defined by the first blade and the second blade.

9. The impeller for microbubbling liquids according to claim 8, characterized in that, The coupling device includes a magnet disposed around the base for magnetically engaging the motor.

10. The impeller for microbubbling liquids according to claim 8, characterized in that, The base has a housing, and the coupling device includes a magnet disposed around the housing for magnetically engaging the motor.

11. An automatic foamer for micro-foaming liquids, characterized in that, include: A vessel used to hold liquids; An impeller is disposed within the vessel; as well as An electric motor is used to rotate the impeller; The impeller includes: A roughly circular base with an outer edge and a central axis; The first support wall extends upward from or around the outer edge of the base and curves inward toward the central axis; The first blade extends upward from the first support wall; The second support wall extends upward from or around the outer edge of the base and curves inward toward the central axis; The second blade extends upward from the second support wall; A protective cover is provided around the first blade and the second blade; A screen is attached to the protective cover; An inlet, defined by the first blade and the second blade, is used to contain the liquid to be micro-foamed; A first outlet, defined by the first support wall, the second support wall, and the base, is used to allow liquid to be ejected radially outward away from the central axis during microbubbling; and The second outlet, defined by the first support wall, the second support wall, and the base, is used to allow liquid to be sprayed radially outward away from the central axis during microfoaming.

12. The automatic foamer for micro-foaming liquids according to claim 11, characterized in that, The protective cover is fixed to the first support wall and the second support wall.

13. The automatic foamer for micro-foaming liquids according to claim 11, characterized in that, The motor is a variable speed motor, and the vessel includes at least one button for changing the motor power.

14. The automatic foamer for micro-foaming liquids according to claim 11, characterized in that, The vessel includes a first container for holding the liquid to be micro-foamed, and wherein the vessel includes a second container for holding the motor.

15. The automatic foamer for micro-foaming liquids according to claim 11, characterized in that, It also includes a coupling device for detachably connecting the impeller to the motor.

16. The automatic foamer for micro-foaming liquids according to claim 15, characterized in that, The device for detachable connection includes a first set of magnets and a second set of magnets, wherein the first set of magnets is arranged around the impeller and wherein the second set of magnets is arranged around the motor.

17. The automatic foamer for micro-foaming liquids according to claim 16, characterized in that, The base includes a housing, wherein the motor includes an arm extending from the motor, wherein the housing is adapted to receive the arm, wherein a first set of magnets is disposed around the housing, and wherein a second set of magnets is disposed around the arm.

Images