A detachable milk frothing device for a coffee machine and a frothing mechanism thereof

Abstract

The present application relates to a detachable coffee machine milk frothing device and its frothing mechanism, which aims to solve the technical problems of the existing similar products, such as inconvenient disassembly and cleaning, poor milk frothing effect, and less use of frothing device assembly disassembled from the knob in the middle of the lower cover of the milk box. The key points are that the middle of the lower cover of the milk box in the milk tank of the coffee machine is provided with a knob, the bottom of the knob is provided with two equal-distance protruding reverse buckles which respectively extend out of the L-shaped hole of the lower cover of the milk box, at the same time, the reverse buckles are buckled with the inner wall buckling ribs of the inner sleeve in the center of the upper cover of the milk box through rotation, the inner sleeve on both sides of the upper cover of the milk box is respectively provided with a limiting port for mounting and fixing the frothing device assembly; the frothing tube inner plug is arranged in the frothing tube of the frothing device main pipe at one end of the frothing device main pipe connected with the frothing device main body, the frothing device inner plug is fixedly arranged in the hole of the protruding part of the end of the frothing device main body, and the positioning column of the frothing device main body is screwed into the L-shaped slot with an opening at the plug opening of the frothing tube inner plug.

Description

TECHNICAL FIELD

[0001] The present application relates to a milk frothing device of a coffee machine, and is a detachable coffee machine milk frothing device and a frothing mechanism thereof. BACKGROUND

[0002] A coffee machine is an electrical device for making coffee, generally divided into semi-automatic and fully automatic, among which the semi-automatic coffee machine is an Italian traditional coffee machine, which grinds, presses, loads, brews and manually removes residues according to manual operation, and some of which need a milk frothing device to improve the taste of the beverage. There are generally three ways to achieve the existing coffee machine milk frothing: steam rod, suction pipe and milk box. The above three ways have basically the same principle, which is to form milk froth by sucking air or milk at high speed based on the Venturi effect. In the existing coffee machine, some devices with milk frothing function are usually designed integrally with the coffee machine body, which is not convenient in use and cleaning. On the one hand, the integrated design makes the milk frothing device design complex, the parts are fixed by screws, which affects the production efficiency, and consumers cannot disassemble the parts, making it difficult to clean thoroughly; on the other hand, it is easy to breed bacteria, affecting the sanitary quality of coffee drinks. Therefore, as disclosed in the Chinese patent document with application number 202410794481.1, application publication date 2024.08.16, invention name "a milk frothing device and a coffee machine having the same"; and as disclosed in the Chinese patent document with application number 202310673296.2, application publication date 2023.10.03, invention name "milk frothing device, milk frothing air inlet assembly and button lock assembly thereof"; but the above products and similar products are mainly disassembled by keying, but after disassembling the box cover, the frothing device assembly is less disassembled from the middle knob at the bottom of the lower cover of the milk box, and the internal structure of the existing frothing device assembly is less designed, resulting in poor Venturi effect and poor milk frothing effect, large space occupation of the milk outlet and the milk box, and poor layout rationality. SUMMARY

[0003] To overcome the above shortcomings, the purpose of the present application is to provide a full disassembly type detachable coffee machine milk frothing device without screw fixing parts and a frothing mechanism thereof to the field, so as to solve the technical problems that the existing similar products are less disassembled from the middle knob at the bottom of the lower cover of the milk box after disassembling the box cover, and the internal structure of the existing frothing device assembly is less designed, resulting in poor Venturi effect and poor milk frothing effect, large space occupation of the milk outlet and the milk box, and poor layout rationality. The purpose is achieved through the following technical scheme.

[0004] The detachable coffee machine milk frothing device comprises a milk tank, a milk box lower cover, a milk box upper cover and a frothing device assembly, the frothing device assembly comprises an air inlet assembly, a steam inlet assembly, a milk outlet nozzle assembly and a straw assembly; the frothing device assembly is fixedly arranged in a groove at the top of the milk box lower cover and between the milk box lower cover and the milk box upper cover in the milk box upper cover, the outer diameter of the top notch of the milk box lower cover is matched with the inner diameter of the bottom cover opening of the milk box upper cover, and the milk box lower cover and the milk box upper cover are integrally connected and fixedly connected to the tank opening at the top of the milk tank through the locking assembly arranged on the milk box lower cover or the milk box upper cover, the steam inlet at the steam inlet assembly of the frothing device assembly and the milk outlet at the milk outlet nozzle assembly respectively extend out of the milk box upper cover, and the straw body at the straw assembly of the frothing device assembly respectively extends into the milk tank through the milk box lower cover. The structural design points are that a rotary knob is arranged at the middle of the milk box lower cover in the milk tank, the two pairs of equidistant and protruding reverse buckles of the rotary knob bottom respectively extend out of the L-shaped hole of the milk box lower cover, and the reverse buckles are buckled with the buckle ribs on the inner wall of the inner sleeve at the center of the milk box upper cover through rotation, and the inner sleeve on both sides of the milk box upper cover is respectively provided with a limiting opening for mounting and fixing the frothing device assembly. Therefore, the tank cover composed of the above-mentioned milk box lower cover, milk box upper cover and frothing device assembly is disassembled through the locking assembly, the frothing device assembly is disassembled from the rotary knob at the middle of the bottom of the milk box lower cover, and cleaning or part replacement is performed.

[0005] The circular surface of the rotary knob in the milk tank is embedded in the milk box lower cover and flush with the plane of the milk box lower cover, a protruding rotary rib is arranged in the semicircular groove of the rotary knob in the milk tank, a rotary knob groove is arranged at the bottom of the rotary rib, the two pairs of equidistant and protruding arc surfaces of the reverse buckles are arranged on the rotary knob groove on both sides of the rotary knob bottom, and the milk box lower cover plane on the outside of the rotary knob is provided with a through hole.

[0006] The locking assembly is symmetrically arranged on both sides of the milk box upper cover, the locking body of the locking assembly is arranged in the locking groove at the outer diameter of the inner sleeve protruding at the center of the milk box upper cover, the protruding shafts on both sides of the locking body are respectively buckled and fixed in the clamping grooves in the locking groove, the pressing parts on the outside of the locking body respectively extend out of the locking holes on both sides of the milk box upper cover, the hook parts of the locking body respectively extend out of the bottom cover opening of the milk box upper cover and the edge grooves on both sides of the milk box lower cover, and are simultaneously buckled and fixed in the hook grooves on both sides of the tank opening at the top of the milk tank, and the locking spring is arranged between the locking body and the inner wall of the milk box upper cover.

[0007] The milk tank and the milk box upper cover are connected in the shape of a rectangular parallelepiped, the outer diameter of the milk outlet nozzle assembly on one side of the milk tank is arranged on the transition slope from the top to the top of the bottom and inward, and the milk outlet nozzle assembly corresponding to the transition slope on the outside is arranged on the outer diameter of the milk tank.

[0008] One side of the top tank opening of the milk tank is provided with a lower rib groove, one side of the milk box lower cover corresponding to the lower rib groove is provided with a positioning rib, one side of the milk box upper cover corresponding to the positioning rib is provided with an upper rib groove, and the positioning rib of the milk box lower cover is guided and fitted into the upper rib groove of the milk box upper cover and the lower rib groove of the milk tank.

[0009] The frothing mechanism body of the coffee machine milk frothing device is a frother assembly, a frothing tube inner plug is arranged in the frothing tube inner plug of the frothing tube main pipe at the connection between the frothing tube main pipe of the frothing tube main body and the frothing tube main body of the steam inlet assembly, the outer diameter of the frothing tube inner plug in the frothing tube main pipe is provided with a two-stage stepped peripheral surface, the outer diameter of the frothing tube main body in the frothing tube main pipe is provided with a three-stage stepped peripheral surface, the side pipe opening of the frothing tube main pipe is provided with a frothing tube cover, the other stage stepped peripheral surface of the outer diameter of the frothing tube main body and the one end cover opening of the frothing tube cover are limited to the pipe opening of the frothing tube main pipe, meanwhile, the positioning block protruding from the outer diameter of the frothing tube main body passes through the other end cover opening of the frothing tube cover and is screwed into the spiral hole on one side of the frothing tube cover to the locking position; the frothing tube inner plug is fixedly arranged in the hole opening of the end protrusion of the frothing tube main body in the frothing tube main pipe, the outer diameter of the hole opening of the end protrusion is symmetrically provided with a positioning column, the positioning column is screwed into the L-shaped groove opened in the plug opening of the frothing tube inner plug in the frothing tube main pipe, the three-stage stepped peripheral surface of the frothing tube main body and the hole opening of the end protrusion are respectively provided with symmetric frothing grooves and frothing holes between the outer diameters of the two sides; the frothing tube main pipe is a Venturi tube with the three-stage stepped peripheral surface of the frothing tube main body and the three-stage stepped peripheral surface of the frothing tube inner plug of the frothing tube main pipe of the steam inlet assembly sequentially increasing in diameter, the frothing tube main body of the frothing tube main pipe and the frothing tube inner plug are respectively provided with a gas inlet assembly mounting hole and a straw assembly connecting hole at the side of the end of the frothing tube main body connected with the frothing tube inner plug, the frothing tube main pipe of the other end of the symmetric steam inlet assembly is provided with a milk outlet nozzle assembly. Thus, the steam entering the steam inlet assembly, the milk entering the straw assembly and the air entering the gas inlet assembly form mixed frothing in the frothing tube inner plug of the frothing tube main pipe and the frothing tube main body of the steam inlet assembly, and finally the frothing is completed and sprayed out from the milk outlet nozzle assembly.

[0010] The milk outlet nozzle body of the milk outlet nozzle assembly is in an inclined "V" shape, L The one end of the milk outlet nozzle body is inserted into the frothing tube main pipe and then rotationally fixed by the limiting ribs protruding from the outer diameter of the port corresponding to the gap in the inner diameter of the hole opening of the upper cover of the milk box, and the limiting ring protruding from the outer diameter of the milk outlet nozzle body at the limiting rib position abuts against the hole opening of the upper cover of the milk box to limit the position.

[0011] The other end of the milk outlet nozzle body is provided with a telescopic milk pipe, and the connection between the telescopic milk pipe and the milk outlet nozzle body is provided with a telescopic milk pipe sealing ring.

[0012] The frothing tube main body of the steam inlet assembly is provided with a milk box connector sealing ring fixed in the frothing tube main body by a frothing tube cover buckle, the outer diameter and the hole diameter of the milk box connector sealing ring are larger than the outer diameter and the hole diameter of the frothing tube inner plug, and the frothing tube inner plug and the milk box connector sealing ring support in the frothing tube main body are provided with a transition cavity.

[0013] The straw body of the straw assembly is connected with the frothing tube main pipe through a straw connector, and the straw connector is provided with a straw inner plug.

[0014] The milk box air inlet piece is arranged in the air inlet of one end of the air inlet body of the air inlet assembly, the orifice of the other end of the air inlet body is connected with the connecting hole of the suction pipe assembly of the frother main pipe, the duckbill is arranged in the connecting hole of the frother main pipe at the connecting position, the flat mouth of one end of the duckbill is sleeved into the connecting hole of the frother main pipe, and the round orifice of the other end of the duckbill is limited in the orifice of the connecting hole of the frother main pipe, the air inlet assembly is arranged in the upper cover of the milk box, and the air inlet gap is arranged between the air inlet assembly and the inner wall of the upper cover of the milk box.

[0015] The structure of the present application has reasonable structure design, and is convenient to disassemble, clean and assemble as a whole, has good frothing effect, has small space occupation of the milk outlet and the milk box, especially the frother assembly in the box cover and components thereof are convenient to disassemble, clean and replace, and is suitable for use as a detachable coffee machine milk frothing device and a frothing mechanism thereof, and structure improvement of similar products. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is an explosion structure schematic diagram of the present application.

[0017] Figure 2 is Figure 1 the assembly after the three-dimensional structure schematic diagram.

[0018] Figure 3 is Figure 2 the bottom structure schematic diagram of the box cover after opening, and the milk box is omitted in the figure.

[0019] Figure 4 is Figure 3 the frother assembly structure schematic diagram in the box cover.

[0020] Figure 5 is Figure 4 the internal structure of the frother main pipe, and the dotted line in the figure is the frother main pipe.

[0021] Figure 6 is Figure 5 the enlarged structure schematic diagram of the frothing pipe inner plug, the frothing pipe cover and the frother body after assembly.

[0022] Figure 7 is Figure 2 the cross-sectional structure schematic diagram Figure 1 .

[0023] Figure 8 is Figure 2 the cross-sectional structure schematic diagram Figure 2 .

[0024] Figure 9 is Figure 2 the cross-sectional structure schematic diagram Figure 3 .

[0025] Figure 10 is Figure 3A schematic diagram of the foamer assembly, the top cover of the milk carton, and the bottom cover of the milk carton in their open states.

[0026] Attached Figures and Their Names: 1. Milk Carton; 101. Hook Groove; 102. Lower Rib Groove; 2. Knob; 201. Inverted Clip; 3. Milk Carton Lower Cover; 301. L-shaped Hole; 302. Positioning Rib; 4. Air Intake Assembly; 401. Milk Carton Air Intake Plate; 402. Air Intake Body; 403. Duckbill; 5. Steam Inlet Assembly; 501. Aerator Cover; 502. Milk Carton Connector Sealing Ring; 503. Aerator Inner Plug; 504. Aerator Body; 5041. Positioning Block; 5042. Positioning Post; 5043. Aerator Groove; 5044. Aerator Hole; 6. 7. Milk box lid, 701. Inner sleeve, 7011. Buckle, 8. Nipple assembly, 801. Nipple body, 8011. Limiting rib, 8012. Limiting ring, 802. Telescopic milk tube sealing ring, 803. Telescopic milk tube, 9. Locking assembly, 901. Locking body, 902. Locking spring, 10. Straw assembly, 1001. Straw body, 1002. Straw connector, 1003. Straw inner plug, 11. Foaming tube inner plug, 1101. L-shaped groove, 12. Foaming tube cap, 1201. Spiral hole. Implementation

[0027] The structure and use of the present invention will now be further described with reference to the accompanying drawings. Figures 1-10 As shown, the milk frothing device of the coffee machine includes a milk tank 1, a lower milk box cover 3, a higher milk box cover 7, and a frother assembly. The frother assembly includes an air inlet assembly 4, a steam inlet assembly 5, a milk outlet assembly 8, and a straw assembly 10. The frother assembly is fixedly installed in the groove at the top of the lower milk box cover and between the lower and upper milk box covers inside the upper milk box cover. The outer diameter of the top groove of the lower milk box cover is fastened to the inner diameter of the bottom opening of the upper milk box cover, and is fastened to the top opening of the milk tank by a locking assembly 9 installed on the lower or upper milk box cover. The steam inlet of the steam inlet assembly and the milk outlet of the milk outlet assembly of the frother assembly extend out of the upper milk box cover, respectively. The straw body 1001 of the straw assembly of the frother assembly extends into the milk tank through the lower milk box cover.

[0028] The specific structure is as follows: the middle part of the lower cover of the milk box in the milk tank is provided with a knob 2, the bottom of the knob is provided with two equidistant protrusions 201 which respectively extend out of the L-shaped hole 301 of the lower cover of the milk box, at the same time, the protrusions are buckled with the inner wall of the inner sleeve 701 in the center of the upper cover of the milk box through rotation, the inner sleeve in the upper cover of the milk box is provided with a limiting hole on both sides for mounting and fixing the frother assembly. The circular surface of the knob in the milk tank is embedded in the lower cover of the milk box and is flush with the plane of the lower cover of the milk box, the semicircular groove in the knob is provided with a protruding rotating rib in the middle, the bottom of the rotating rib is provided with a knob groove corresponding to the bottom of the knob, the protruding arc surface of the protrusions is provided on both sides of the knob groove in the bottom of the knob, and the plane of the lower cover of the milk box on the outside of the knob is provided with a through hole. The locking assembly is symmetrically arranged on both sides of the upper cover of the milk box, the locking body 901 of the locking assembly is arranged in the locking groove on the outer diameter of the inner sleeve protruding in the center of the upper cover of the milk box, the rotating shaft protruding on both sides of the locking body is respectively buckled and fixed in the clamping groove in the locking groove, the pressing part on the outside of the locking body respectively protrudes out of the locking hole on both sides of the upper cover of the milk box, the hook part of the locking body respectively protrudes out of the bottom cover hole of the upper cover of the milk box and the edge groove on both sides of the lower cover of the milk box, and is buckled and fixed in the hook groove 101 on both sides of the top box hole of the milk tank at the same time, and the locking spring 902 is arranged between the locking body and the inner wall of the upper cover of the milk box. The milk tank and the upper cover of the milk box are connected to form a rectangular body, the outer diameter of the milk outlet assembly on one side of the milk tank is provided with a transition slope which transitions from the top to the bottom and upward, and the milk outlet assembly corresponding to the transition slope is arranged obliquely on the outer diameter of the milk tank. One side of the top box hole of the milk tank is provided with a lower rib groove 102, the lower cover of the milk box corresponding to the lower rib groove is provided with a positioning rib 302 on one side, and the upper cover of the milk box corresponding to the positioning rib is provided with an upper rib groove on one side, and the positioning rib of the lower cover of the milk box is guided and assembled into the upper rib groove of the upper cover of the milk box and the lower rib groove of the milk tank.

[0029] The aforementioned bubbler assembly has a bubble tube plug 11 inside the bubbler main pipe at one end of the connection between the bubbler main pipe and the bubbler body 504 of the steam inlet assembly. The outer diameter of the bubble tube plug inside the bubbler main pipe has a two-stage stepped circumferential surface, and the outer diameter of the bubbler body inside the bubbler main pipe has a three-stage stepped circumferential surface. A bubble tube cap 12 is provided at the pipe opening on this side of the bubbler main pipe. The other stage stepped circumferential surface of the outer diameter of the bubbler body and one end cap of the bubble tube cap are limited to the pipe opening of the bubbler main pipe. At the same time, the positioning block 5041 protruding from the outer diameter of the bubbler body interference passes over the other end cap of the bubble tube cap and is screwed into the spiral hole 1201 on one side of the bubble tube cap to the locking position. A bubble tube plug is fixedly installed inside the hole at the end protrusion of the bubbler body inside the bubbler main pipe. The inner plug of the bubbler 503 has symmetrically arranged positioning pins 5042 on the outer diameter of the orifice at the end protrusion. The positioning pins are screwed into the L-shaped groove 1101 at the opening of the inner plug of the bubbling tube in the main bubbler pipe. Symmetrical bubbling grooves 5043 and bubbling holes 5044 are respectively provided on both sides of the outer diameter between the three-step circumferential surface of the bubbling body and the orifice at the end protrusion. The main bubbler pipe is a Venturi tube with a progressively increasing conical diameter on the circumferential surface of the inner plug of the bubbling tube at one end of the steam inlet assembly and the three-step circumferential surface of the bubbler body. The bubbler body end at the connection between the bubbler body and the inner plug of the bubbling tube in the main bubbler pipe has a connecting hole for the air inlet assembly and a connecting hole for the straw assembly. The other end of the main bubbler pipe symmetrical to the steam inlet assembly has a nipple assembly.

[0030] The nipple body 801 of the aforementioned nipple assembly is angled. L The nipple body is shaped like the Chinese character "“". One end of the nipple body is inserted into the milk box cover through a notch 8011 on the outer diameter of the port, which corresponds to the notch on the inner diameter of the opening. It is then connected to the main body of the frother and rotated to fix it in place. The limiting ring 8012 on the outer diameter of the nipple body at the limiting rib abuts against the opening on the milk box cover. The other end of the nipple body is provided with a telescopic milk tube 803, and a telescopic milk tube sealing ring 802 is provided at the connection between the telescopic milk tube and the nipple body. The steam inlet assembly has a milk box connector sealing ring 502 inside the opening at the other end of the frother body, which is fastened and fixed inside the frother body by the frother cover 501. The outer diameter and the hole diameter of the milk box connector sealing ring are larger than the outer diameter and the hole diameter of the frother inner plug 503. The inner plug of the frother and the sealing ring bracket of the milk carton connector have a transition cavity. The straw body 1001 of the straw assembly is connected to the main frother of the frother via the straw connector 1002, and the straw connector at the connection point has an inner straw plug 1003. The air intake body 402 of the air intake assembly has a milk carton air intake plate 401 in the air intake port at one end, and the opening at the other end of the air intake body is connected to the connection hole of the straw assembly of the frother main body. The connection hole of the frother main body at the connection point has a duckbill 403. The flat opening at one end of the duckbill fits into the connection hole of the frother main body, and the round opening at the other end of the duckbill is limited to the opening of the connection hole of the frother main body. The air intake assembly is located inside the milk carton lid, and there is an air intake gap between it and the inner wall of the milk carton lid.

[0031] In use, the coffee machine milk frothing device is placed in one side of the coffee machine, the steam inlet assembly is connected to the steam port of the coffee machine, the frothing button of the coffee machine is pressed, the coffee machine provides steam, the frothing assembly froths the milk, and the frothed milk is sprayed out from the milk outlet nozzle assembly. When cleaning or replacing the coffee machine milk frothing device is needed, the user can easily detach the coffee machine milk frothing device from the coffee machine body for separate cleaning or maintenance.

[0032] At the same time, the fixing method of the milk outlet nozzle assembly rotates the milk outlet nozzle assembly 180° upward, one end of the milk outlet nozzle body is inserted into the gap of the inner diameter of the hole of the upper cover of the milk box through the limiting rib of the outer diameter of the port, and then rotated by a certain angle; this structure is easy to disassemble and clean; the telescopic milk pipe has a wide range of use and can be applied to various different cups. The fixing method of the knob rotates the box cover about 22° to the right to the locking mark after the box cover is detached from the milk box through the lock assembly; the fixing method of the lock assembly installs the lock assembly in place, then puts the box cover into the milk box, and the lock assembly is fixed with the milk box; when the milk box needs to be taken out, press the lock assemblies on both sides, the lock assembly and the milk box will be separated, and the milk box or the box cover can be easily taken out.

[0033] In summary, the coffee machine milk frothing device uses a spring to realize the telescopic, fixing and removal of the lock assembly, which is easy to operate and reliable to fix; at the same time, the upper cover and the lower cover of the milk box use a knob locking structure to realize the separation and cleaning of the internal milk passing part; in addition, the milk outlet nozzle assembly uses a telescopic milk pipe design, which can be applied to different cup types.

Claims

1. A detachable milk frothing device for a coffee machine, comprising a milk container (1), a lower cover (3), an upper cover (7), and a frother assembly, wherein the frother assembly comprises an air inlet assembly (4), a steam inlet assembly (5), a milk outlet assembly (8), and a straw assembly (10); the frother assembly is fixedly disposed in a groove at the top of the lower cover and between the lower cover and the upper cover of the milk container, wherein the outer diameter of the top groove of the lower cover is fastened to the inner diameter of the bottom opening of the upper cover, and is fastened to the top opening of the milk container by a locking assembly (9) disposed on the lower cover or the upper cover of the milk container, wherein the steam inlet of the steam inlet assembly and the milk outlet of the milk outlet assembly of the frother assembly extend out of the upper cover of the milk container, and the straw body (1001) of the straw assembly of the frother assembly extends into the milk container through the lower cover of the milk container; characterized in that A knob (2) is provided in the middle of the lower cover (3) of the milk box (1). Two equidistant buckles (201) at the bottom of the knob protrude from the L-shaped holes (301) of the lower cover. At the same time, the buckles are engaged with the buckle rib (7011) on the inner wall of the inner sleeve (701) protruding in the center of the upper cover (7) of the milk box by rotation. The inner sleeve inside the upper cover of the milk box is provided with limiting ports for installing and fixing the aerator assembly on both sides. The aerator main pipe (6) and the steam inlet assembly (5) The aerator body (504) has an aerator tube plug (11) at one end of the aerator main pipe. The outer diameter of the aerator tube plug in the aerator main pipe has a two-stage stepped circumferential surface. The outer diameter of the aerator body in the aerator main pipe has a three-stage stepped circumferential surface. The side opening of the aerator main pipe has an aerator tube cap (12). The other stage of the outer diameter of the aerator body and one end of the cap of the aerator tube cap are limited to the opening of the aerator main pipe. At the same time, the positioning block (5041) protruding from the outer diameter of the aerator body passes through... The foam tube cap is screwed over to the other end and into the spiral hole (1201) on one side of the foam tube cap until it is locked. An inner plug (503) is fixedly installed inside the hole at the end protrusion of the foam tube body inside the foam tube main pipe. Positioning pins (5042) are symmetrically arranged on the outer diameter of the hole at the end protrusion. The positioning pins are screwed into the L-shaped groove (1101) at the opening of the inner plug of the foam tube inside the foam tube main pipe. The outer diameter of the three-step circumferential surface of the foam body is respectively... The steam inlet assembly is provided with symmetrical foaming grooves (5043) and foaming holes (5044); the main steam inlet assembly is a Venturi tube with a progressively increasing conical diameter on the three-step circumferential surface of the steam inlet assembly and the foaming tube plug at one end. The steam inlet assembly and the foaming tube plug are connected at the foaming body end on one side, respectively, with a mounting hole at the air inlet assembly (4) and a connecting hole at the straw assembly (10). The other end of the steam inlet assembly is provided with a nipple assembly (8).

2. The detachable coffee machine milk frothing device according to claim 1, characterized in that... The inner circular surface of the knob (2) is embedded in the lower cover (3) of the milk box and is flush with the plane of the lower cover. The knob inside the milk box has a raised rotating rib in the middle of the semi-circular groove. The knob bottom at the bottom of the rotating rib has a corresponding knob groove. The inverted buckle (201) is equidistantly arranged on the raised arc surface on both sides of the knob bottom knob groove. The lower cover plane of the milk box outside the knob has a through hole.

3. The detachable coffee machine milk frothing device according to claim 1, characterized in that... The locking assembly (9) is symmetrically arranged on both sides of the milk box cover (7). The locking body (901) of the locking assembly is located in the locking groove at the outer diameter of the inner sleeve (701) protruding in the center of the milk box cover. The rotating shafts protruding on both sides of the locking body are respectively locked in the slots in the locking groove. The pressing part on the outside of the locking body protrudes from the locking holes on both sides of the milk box cover. The hook part of the locking body extends out of the bottom cover opening of the milk box cover and the side grooves on both sides of the bottom cover (3) of the milk box, and simultaneously engages and is fixed to the hook grooves (101) on both sides of the top opening of the milk box (1). Locking springs (902) are respectively provided between the locking body and the inner wall of the milk box cover.

4. The detachable coffee machine milk frothing device according to claim 1, characterized in that... The milk box (1) is connected to the milk box cover (7) in a cuboid shape. The outer diameter of the milk box nipple assembly (8) is set with a transition slope from the top to the bottom and inward. The nipple assembly corresponding to the outer side of the transition slope is obliquely set on the outer diameter of the milk box.

5. The detachable coffee machine milk frothing device according to claim 1, characterized in that... The top opening of the milk box (1) is provided with a lower rib groove (102), the lower cover (3) of the milk box corresponding to the lower rib groove is provided with a positioning rib (302), the upper cover (7) of the milk box corresponding to the positioning rib is provided with an upper rib groove, and the positioning rib of the lower cover of the milk box is guided into the upper rib groove of the upper cover of the milk box and the lower rib groove of the milk box.

6. The detachable coffee machine milk frothing device according to claim 1, characterized in that... The nipple body (801) of the nipple assembly (8) is angled. L The nipple body is shaped like the Chinese character "“". One end of the nipple body is inserted into the notch of the inner diameter of the opening at the top cover of the milk box (7) through the limiting rib (8011) on the outer diameter of the port, and then connected to the main tube of the frother (6) and then rotated to fix it in a misaligned position. The limiting ring (8012) on the outer diameter of the nipple body at the limiting rib abuts against the opening at the top cover of the milk box for limiting. The other end of the nipple body is provided with a telescopic milk tube (803), and a telescopic milk tube sealing ring (802) is provided at the connection between the telescopic milk tube and the nipple body.

7. The detachable coffee machine milk frothing device according to claim 1, characterized in that... The steam inlet assembly (5) has a milk carton connector sealing ring (502) at the other end of the bubbler body (504) provided with a milk carton connector sealing ring (502) that is fastened and fixed inside the bubbler body by the bubbler cover (501). The outer diameter and hole diameter of the milk carton connector sealing ring are larger than the outer diameter and hole diameter of the bubbler inner plug (503). The bubbler inner plug and the milk carton connector sealing ring support are provided with a transition cavity inside the bubbler body.

8. The detachable coffee machine milk frothing device according to claim 1, characterized in that... The straw body (1001) of the straw assembly (10) is connected to the foamer main tube (6) through the straw connector (1002), and the straw connector at the connection is provided with a straw plug (1003).

9. The detachable coffee machine milk frothing device according to claim 1, characterized in that... The air intake assembly (4) has an air intake body (402) with an air intake port at one end, which is provided with a milk box air intake plate (401). The other end of the air intake body is connected to the connection hole of the straw assembly of the frother (6). The connection hole of the frother is provided with a duckbill (403). The flat opening at one end of the duckbill is fitted into the connection hole of the frother, and the round opening at the other end of the duckbill is limited to the opening of the connection hole of the frother. The air intake assembly is located inside the milk box cover (7) and has an air intake gap between it and the inner wall of the milk box cover.

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