Coffee machine milk box and milk frother

Abstract

The utility model provides a coffee machine milk box and a milk frother, the coffee machine comprises a box body and a box cover, the box cover is detachably arranged on the box body, a valve seat is arranged on the box cover, an adjusting valve is detachably arranged in the valve seat, a flow channel is arranged in the adjusting valve, an inlet of the flow channel is detachably connected with a milk inlet pipe, and the milk inlet pipe is connected with the milk frother. A milk outlet pipe is detachably connected to an outlet of the flow channel; and the adjusting valve is used for adjusting the flow of milk in the flow channel. The regulating valve is installed in the valve seat arranged on the box cover, so that the box cover is detached from the box body, the regulating valve is detached from the valve seat, namely, the regulating valve is cleaned, the structure is simple, and the convenience of cleaning is improved; the milk flow is adjusted through the adjusting valve, so that the temperature of the milk foam can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee machines, in particular to a milk box and a milk frother for a coffee machine. Background Art

[0002] At present, many coffee machines on the market have the function of making milk foam. The coffee machine sucks the milk liquid in the milk box, so as to mix air, steam and milk liquid in the mixing cavity to form milk foam. However, the diameter of the milk liquid suction pipe is fixed and the flow rate of the milk liquid cannot be adjusted, resulting in an unsatisfactory milk foam forming effect.

[0003] In order to solve the above technical problems, a Chinese patent with the publication number of CN211795932U provides a milk frother with adjustable flow rate, which includes a body, a mixing cavity, a flow channel, a steam inlet, an air inlet and a milk suction pipe arranged in the body. The outlet end of the mixing cavity is connected to a milk foam outlet. The steam inlet is communicated with the upper end of the mixing cavity. One end of the flow channel is communicated with one side of the mixing cavity and is close to the steam inlet. The other end of the flow channel is communicated with the milk suction pipe. The air inlet is communicated and arranged above the flow channel. A flow regulating valve capable of adjusting the milk flow rate in the flow channel is also arranged on the flow channel. Along the flow direction of the milk, the flow regulating valve is located in front of or behind the air inlet. The above milk frother adjusts the milk flow rate by arranging a flow regulating valve on the flow channel. However, the milk frother cannot be disassembled and assembled, making it inconvenient to clean.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a milk box and a milk frother for a coffee machine aiming at the defects and deficiencies of the prior art. By installing the regulating valve in the valve seat arranged on the box cover, when the box cover is removed from the box body and the regulating valve is disassembled from the valve seat, the regulating valve can be cleaned. The structure is simple, which is beneficial to improving the cleaning convenience. By adjusting the milk liquid flow rate through the regulating valve, the adjustment of the high and low temperatures of the milk foam can be realized.

[0006] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0007] The utility model provides a milk box for a coffee machine, which includes a box body and a box cover. The box cover is detachably arranged on the box body. A valve seat is arranged on the box cover. A regulating valve is detachably arranged in the valve seat. A flow channel is arranged in the regulating valve. The inlet of the flow channel is detachably connected with a milk inlet pipe. The outlet of the flow channel is detachably connected with a milk outlet pipe. The regulating valve is used for adjusting the milk liquid flow rate in the flow channel.

[0008] By installing the regulating valve inside the valve seat provided on the box cover, when the box cover is removed from the box body and the regulating valve is disassembled from the valve seat, that is, the regulating valve is cleaned. The structure is simple, which is conducive to improving the convenience of cleaning.

[0009] According to the above solution, the regulating valve includes a valve body and a valve stem. The flow channel is formed on the valve body, and the valve stem is rotatably arranged on the flow channel. The axial direction of the valve stem is perpendicular to the direction of the flow channel.

[0010] Through the above structural arrangement, the valve stem rotates relative to the valve body around the axial center line, so that the flow rate of the milk liquid in the flow channel can be adjusted.

[0011] According to the above solution, a first groove, a milk inlet, a second groove and a milk outlet are sequentially arranged on the outer wall of the valve stem in the first rotation direction along the circumferential direction; the first groove communicates with the milk inlet, and the second groove communicates with the milk outlet; a milk outlet channel is radially penetrated in the valve stem, and both ends of the milk outlet channel communicate with the milk inlet and the milk outlet respectively; the cross-sectional area of the first groove gradually decreases starting from the milk inlet.

[0012] Through the above structural arrangement, when the milk inlet is aligned with the inlet of the flow channel, the milk outlet is aligned with the outlet of the flow channel, and the milk liquid flows out sequentially through the milk inlet pipe, the inlet of the flow channel, the milk outlet channel, the outlet of the flow channel and the milk outlet pipe. The liquid inlet area of the inlet of the flow channel is the largest, and the milk liquid flow rate is the largest. Rotating the valve stem in the first rotation direction makes the first groove aligned with the inlet of the flow channel, and the milk liquid flows out sequentially through the milk inlet pipe, the inlet of the flow channel, the first groove, the milk outlet channel, the second groove, the outlet of the flow channel and the milk outlet pipe. The liquid inlet area of the inlet of the flow channel decreases, and the flow path of the milk liquid increases, resulting in a decrease in the milk liquid flow rate. When the valve stem is continuously rotated in the first rotation direction so that the outer wall of the valve stem blocks the inlet of the flow channel, the flow channel is closed, and the milk liquid in the box body cannot flow out.

[0013] It can be understood that the first rotation direction is the clockwise direction or the counterclockwise direction.

[0014] According to the above solution, the width and / or depth of the first groove gradually decreases starting from the milk inlet. By setting the width and / or depth of the first groove, the cross-sectional area of the first groove gradually decreases starting from the milk inlet.

[0015] According to the above solution, the cross-sectional area of the second groove gradually decreases starting from the milk outlet. Through the above structural arrangement, when the gap between the first groove and the inner wall of the flow channel decreases, the gap between the second groove and the inner wall of the flow channel also decreases synchronously, thereby further reducing the milk liquid flow rate in the flow channel.

[0016] According to the above solution, the width and / or depth of the second groove gradually decreases starting from the milk outlet. By setting the width and / or depth of the second groove, the cross-sectional area of the second groove gradually decreases starting from the milk outlet.

[0017] It can be understood that those skilled in the art can flexibly set parameters such as the width and depth of the first groove and the second groove according to the required range of milk flow rate.

[0018] According to the above solution, an installation port is horizontally provided on the valve seat, and the first end of the valve stem passes through the installation port and is inserted into the valve body; the second end of the valve stem passes through the installation port and extends to the outside.

[0019] According to the above solution, the valve body is made of a flexible material, a convex ring is provided on the outer wall of the valve stem in the circumferential direction, and an annular groove is provided on the valve body and is matched with the convex ring.

[0020] Through the cooperation of the convex ring and the annular groove, when the valve stem rotates relative to the valve body around the axial center line, the convex ring rotates in the annular groove, improving the stability of the rotation of the valve stem; and it can prevent the valve stem from disengaging from the valve body during the working process. By setting the valve body to be made of a flexible material, when a certain external force is applied to the valve stem to pull it outwards from the installation port, the valve stem can be removed from the valve body, further improving the cleaning convenience.

[0021] It can be understood that the valve body can be made of flexible materials such as rubber and silica gel, and being arranged in the valve seat is also beneficial to improving the sealing performance between the valve body and the valve stem.

[0022] According to the above solution, a positioning groove is provided on the inner wall of the installation port, and a positioning block that slides in the positioning groove is provided on the outer wall of the valve stem; the positioning groove includes a first positioning groove, a guiding groove, and a second positioning groove that are sequentially connected along a first rotation direction, and both ends of the guiding groove are respectively communicated with the first positioning groove and the second positioning groove; the first side surface of the first positioning groove is used to position the valve stem at the maximum flow rate position, the second side surface of the first positioning groove is used to position the valve stem at the minimum flow rate position, and the second positioning groove is used to position the valve stem at the closed flow rate position.

[0023] Through the above structural settings, when the first side surface of the first positioning groove abuts against the positioning block, the milk inlet is aligned with the inlet of the flow channel, the milk liquid flow rate in the flow channel is the largest, and the valve stem is positioned at the maximum flow rate position; when the second side surface of the first positioning groove abuts against the positioning block, the minimum cross-sectional area of the first groove is aligned with the inlet of the flow channel, the milk liquid flow rate in the flow channel is the largest, and the valve stem is positioned at the minimum flow rate position; when the positioning block is snapped into the second positioning groove along the guiding groove, the outer wall of the valve stem seals the inlet of the flow channel to close the flow channel, and the valve stem is positioned at the closed flow rate position.

[0024] According to the above solution, a knob is fixedly connected to the second end of the valve stem; an indicating strip is provided on the outer wall of the installation port, and a first position mark, a second position mark, and a third position mark are circumferentially provided on the outer wall of the knob; when the valve stem is respectively positioned at the maximum flow rate position, the minimum flow rate position, and the closed flow rate position, the first position mark, the second position mark, and the third position mark are respectively aligned with the indicating strip.

[0025] By holding the knob, the valve stem can be driven to rotate relative to the valve body around the axial center line, improving the convenience of use. By checking which position mark on the knob is aligned with the indicating strip, the user can intuitively know the state of the milk liquid flow rate in the flow channel, which is beneficial to improving the convenience of use.

[0026] The present utility model further provides a milk frother, which includes a main body and the above milk box. A mixing cavity is provided on the main body, and a steam interface, an air interface, a milk liquid interface, and a milk foam outlet that are respectively communicated with the mixing cavity are provided on the main body. The milk liquid interface is communicated with the milk outlet pipe of the milk box.

[0027] Steam enters the mixing cavity from the steam interface. Due to the Venturi effect, a negative pressure is formed at the milk liquid interface, and the milk liquid in the box body is transported into the mixing cavity. The steam, milk liquid, and air meet and mix in the mixing cavity, and the milk foam is discharged from the milk foam outlet. Since the amount and temperature of the steam entering the mixing cavity are constant, the milk temperature can be adjusted by adjusting the milk liquid flow rate in the flow channel. Specifically, when the milk liquid flow rate is adjusted to be the largest, in the same time, the milk foam absorbs the least amount of heat, and the milk foam temperature is the lowest at this time; when the milk liquid flow rate is adjusted to be the smallest, in the same time, the milk foam absorbs the most amount of heat, and the milk foam temperature is the highest at this time.

[0028] The beneficial effects of the present utility model are as follows:

[0029] The lid of the present utility model is detachably provided on the box body. A valve seat is provided on the lid. A regulating valve is detachably provided in the valve seat. A flow channel is provided in the regulating valve. An inlet milk pipe is detachably connected to the inlet of the flow channel, and an outlet milk pipe is detachably connected to the outlet of the flow channel. The regulating valve is used to adjust the flow rate of the milk liquid in the flow channel. By installing the regulating valve in the valve seat provided on the lid, when the lid is removed from the box body and the regulating valve is detached from the valve seat, the regulating valve can be cleaned. The structure is simple, which is beneficial to improving the convenience of cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the milk box of the coffee machine after removing the inlet milk pipe and the outlet milk pipe of the present utility model;

[0031] Figure 2 is a schematic structural diagram of the milk box of the coffee machine of the present utility model;

[0032] Figure 3 is Figure 2 an enlarged view of part A in

[0033] Figure 4 is a schematic structural diagram of the milk box of the coffee machine after removing the outlet milk pipe and the valve stem of the present utility model;

[0034] Figure 5 is a schematic structural diagram of the lid of the present utility model;

[0035] Figure 6 is Figure 5 an enlarged view of part B in

[0036] Figure 7 is a schematic structural diagram of the valve stem of the present utility model Figure 1 ;

[0037] Figure 8 is a schematic structural diagram of the valve stem of the present utility model Figure 2 ;

[0038] Figure 9 is a schematic structural diagram of the milk box of the coffee machine when the valve stem is positioned at the maximum flow rate position; the arrow direction is the flow direction of the milk liquid;

[0039] Figure 10 is a schematic structural diagram of the milk box of the coffee machine when the valve stem is positioned at the minimum flow rate position; the arrow direction is the flow direction of the milk liquid;

[0040] Figure 11 is a schematic structural diagram of the milk box of the coffee machine when the valve stem is positioned at the closed flow rate position;

[0041] Figure 12It is a schematic structural diagram of the milk frother described in the present utility model.

[0042] In the figure: 1. Box body; 11. Box cover; 2. Valve seat; 21. Installation port; 211. Positioning groove; 212. First positioning groove; 2121. First side; 2122. Second side; 213. Guide groove; 214. Second positioning groove; 215. Indicator bar; 3. Regulating valve; 31. Valve body; 311. Flow channel; 3111. Inlet; 3112. Outlet; 312. Annular groove; 32. Valve rod; 321. First groove; 322. Milk inlet; 323. Second groove; 324. Milk outlet; 325. Milk outlet channel; 326. Convex ring; 327. Positioning block; 328. Knob; 3281. First position mark; 3282. Second position mark; 3283. Third position mark; 4. Milk inlet pipe; 5. Milk outlet pipe; 6. Main body; 7. Mixing cavity; 71. Steam interface; 72. Air interface; 73. Milk liquid interface; 74. Milk foam outlet. Detailed implementation mode

[0043] The technical solution of the present utility model will be described below in conjunction with the accompanying drawings and embodiments.

[0044] As Figure 1-11 shown, the present utility model provides a milk box for a coffee machine, including a box body 1 and a box cover 11. The box cover 11 is detachably arranged on the box body 1. A valve seat 2 is arranged on the box cover 11. A regulating valve 3 is detachably arranged in the valve seat 2. A flow channel 311 is arranged in the regulating valve 3. An inlet pipe 4 is detachably connected to the inlet 3111 of the flow channel 311, and an outlet pipe 5 is detachably connected to the outlet 3112 of the flow channel 311. The regulating valve 3 is used to adjust the flow rate of the milk liquid in the flow channel 311.

[0045] By installing the regulating valve 3 in the valve seat 2 arranged on the box cover 11, when the box cover 11 is removed from the box body 1, the regulating valve 3 can be disassembled from the valve seat 2, that is, the regulating valve 3 is cleaned. The structure is simple, which is beneficial to improving the convenience of cleaning.

[0046] Furthermore, the regulating valve 3 includes a valve body 31 and a valve stem 32. The flow channel 311 is formed on the valve body 31. The valve stem 32 is rotatably arranged on the flow channel 311, and the axial direction of the valve stem 32 is set perpendicular to the direction of the flow channel 311. A first groove 321, a milk inlet 322, a second groove 323, and a milk outlet 324 are sequentially arranged on the outer wall of the valve stem 32 in a first rotation direction along the circumferential direction. The first groove 321 communicates with the milk inlet 322, and the second groove 323 communicates with the milk outlet 324. A milk outlet channel 325 is radially arranged through the valve stem 32, and both ends of the milk outlet channel 325 communicate with the milk inlet 322 and the milk outlet 324 respectively. The cross-sectional area of the first groove 321 gradually decreases starting from the milk inlet 322. In this embodiment, the first rotation direction is set as the clockwise direction.

[0047] Through the above structural arrangement, when the milk inlet 322 is aligned with the inlet 3111 of the flow channel 311, the milk outlet 324 is aligned with the outlet 3112 of the flow channel 311, and the milk liquid flows out sequentially through the milk inlet pipe 4, the inlet 3111 of the flow channel 311, the milk outlet channel 325, the outlet 3112 of the flow channel 311, and the milk outlet pipe 5. The liquid inlet area of the inlet 3111 of the flow channel 311 is the largest, and the milk liquid flow rate is the largest. Rotating the valve stem 32 in the first rotation direction makes the first groove 321 aligned with the inlet 3111 of the flow channel 311, and the milk liquid flows out sequentially through the milk inlet pipe 4, the inlet 3111 of the flow channel 311, the first groove 321, the milk outlet channel 325, the second groove 323, the outlet 3112 of the flow channel 311, and the milk outlet pipe 5. The liquid inlet area of the inlet 3111 of the flow channel 311 decreases, and the flow path of the milk liquid increases, resulting in a decrease in the milk liquid flow rate. When the valve stem 32 is continuously rotated in the first rotation direction so that the outer wall of the valve stem 32 blocks the inlet 3111 of the flow channel 311, the flow channel 311 is closed, and the milk liquid in the box body 1 cannot flow out. By driving the valve stem 32 to rotate relative to the valve body 31 around the axial center line, the flow rate of the milk liquid in the flow channel 311 can be adjusted.

[0048] Furthermore, the cross-sectional area of the second groove 323 gradually decreases starting from the milk outlet 324; the width and / or depth of the first groove 321 gradually decreases starting from the milk inlet 322; the width and / or depth of the second groove 323 gradually decreases starting from the milk outlet 324.

[0049] By setting the width and / or depth of the first groove 321, the cross-sectional area of the first groove 321 is gradually reduced starting from the milk inlet 322; by setting the width and / or depth of the second groove 323, the cross-sectional area of the second groove 323 is gradually reduced starting from the milk outlet 324. When the gap between the first groove 321 and the inner wall of the flow channel 311 decreases, the gap between the second groove 323 and the inner wall of the flow channel 311 also decreases synchronously, thereby further reducing the milk flow rate in the flow channel 311. Those skilled in the art can flexibly set parameters such as the width and depth of the first groove 321 and the second groove 323 according to the required range of milk flow rate.

[0050] Further, an installation port 21 is horizontally provided on the valve seat 2, and the first end of the valve stem 32 passes through the installation port 21 and is inserted into the valve body 31; the second end of the valve stem 32 passes through the installation port 21 and extends to the outside.

[0051] As Figure 3 shown, the valve body 31 is made of a flexible material, a convex ring 326 is provided on the outer wall circumference of the valve stem 32, and an annular groove 312 is provided on the valve body 31 and is matched with the convex ring 326.

[0052] Through the cooperation of the convex ring 326 and the annular groove 312, when the valve stem 32 rotates relative to the valve body 31 around the axial center line, the convex ring 326 rotates in the annular groove 312, improving the rotation stability of the valve stem 32; and it can prevent the valve stem 32 from disengaging from the valve body 31 during the working process. By setting the valve body 31 to be made of a flexible material, when a certain external force is applied to the valve stem 32 to pull it outwards from the installation port 21, the valve stem 32 can be removed from the valve body 31, further improving the cleaning convenience.

[0053] Further, a positioning groove 211 is provided on the inner wall of the installation port 21, and a positioning block 327 that slides in the positioning groove 211 is provided on the outer wall of the valve stem 32; As Figure 5-6 shown, the positioning groove 211 includes a first positioning groove 212, a guiding groove 213, and a second positioning groove 214 that are sequentially connected along a first rotation direction, and both ends of the guiding groove 213 are respectively communicated with the first positioning groove 212 and the second positioning groove 214; the first side surface 2121 of the first positioning groove 212 is used to position the valve stem 32 at the maximum flow rate position, the second side surface 2122 of the first positioning groove 212 is used to position the valve stem 32 at the minimum flow rate position, and the second positioning groove 214 is used to position the valve stem 32 at the closed flow rate position.

[0054] With the above structural arrangement, when the first side surface 2121 of the first positioning groove 212 abuts against the positioning block 327, the milk inlet 322 is aligned with the inlet 3111 of the flow channel 311, the milk liquid flow rate in the flow channel 311 is the largest, and the valve stem 32 is positioned at the maximum flow rate position; when the second side surface 2122 of the first positioning groove 212 abuts against the positioning block 327, the minimum cross-sectional area of the first groove 321 is aligned with the inlet 3111 of the flow channel 311, the milk liquid flow rate in the flow channel 311 is the largest, and the valve stem 32 is positioned at the minimum flow rate position; when the positioning block 327 is snapped into the second positioning groove 214 along the guiding groove 213, the outer wall of the valve stem 32 blocks the inlet 3111 of the flow channel 311, closing the flow channel 311, and the valve stem 32 is positioned at the closed flow rate position.

[0055] As Figure 3 shown, a knob 328 is fixedly connected to the second end of the valve stem 32; an indicating strip 215 is provided on the outer wall of the mounting port 21, and a first position mark 3281, a second position mark 3282 and a third position mark 3283 are circumferentially provided on the outer wall of the knob 328; when the valve stem 32 is respectively positioned at the maximum flow rate position, the minimum flow rate position and the closed flow rate position, the first position mark 3281, the second position mark 3282 and the third position mark 3283 are respectively aligned with the indicating strip 215.

[0056] By holding the knob 328, the valve stem 32 can be driven to rotate relative to the valve body 31 around the axial center line, improving the convenience of use. By checking which position mark on the knob 328 is aligned with the indicating strip 215, the user can directly know the state of the milk liquid flow rate in the flow channel 311, which is beneficial to improving the convenience of use.

[0057] As Figure 12 shown, the present utility model further provides a milk frother, which includes a main body 6 and the above milk box, a mixing cavity 7 is provided on the main body 6, and a steam interface 71, an air interface 72, a milk liquid interface 73 and a milk foam outlet 74 which are respectively communicated with the mixing cavity 7 are provided on the main body 6, and the milk liquid interface 73 is communicated with the milk outlet pipe 5 of the milk box.

[0058] Steam enters the mixing cavity 7 from the steam interface 71. Due to the Venturi effect, a negative pressure is formed at the milk liquid interface 73, and the milk liquid in the box body 1 is transported into the mixing cavity 7. The steam, milk liquid, and air meet and mix in the mixing cavity 7, and the milk foam is discharged from the milk foam outlet 74. Since the amount and temperature of the steam entering the mixing cavity 7 are constant, adjusting the milk liquid flow rate in the flow channel 311 through the regulating valve 3 can achieve the adjustment of the milk temperature. Specifically, when the milk liquid flow rate is adjusted to the maximum, in the same time, the milk foam absorbs the least amount of heat, and the milk foam temperature is the lowest at this time; when the milk liquid flow rate is adjusted to the minimum, in the same time, the milk foam absorbs the most amount of heat, and the milk foam temperature is the highest at this time.

[0059] When the milk foam of the present utility model is in use, steam and air enter the mixing cavity 7 from the steam interface 71 and the air interface 72 respectively. Due to the Venturi effect, a negative pressure is formed at the milk liquid interface 73. The handheld knob 328 drives the valve stem 32 to rotate to the first position mark 3281 to align with the indicating bar 215. At this time, the positioning block 327 on the valve stem 32 abuts against the first side surface 2121 of the first positioning groove 212, as Figure 9 shown, the milk inlet 322 is directly opposite to the inlet 3111 of the flow channel 311, and the milk outlet 324 is directly opposite to the outlet 3112 of the flow channel 311. The milk liquid in the box body 1 flows out into the mixing cavity 7 under the action of negative pressure in sequence through the milk inlet pipe 4, the inlet 3111 of the flow channel 311, the milk outlet channel 325, the outlet 3112 of the flow channel 311, and the milk outlet pipe 5. The milk liquid flow rate is the largest, and the steam, milk liquid, and air meet and mix in the mixing cavity 7, and the milk foam is discharged from the milk foam outlet 74. At this time, the milk foam temperature is the lowest. The handheld knob 328 drives the valve stem 32 to rotate along the first rotation direction to the second position mark 3282 to align with the indicating bar 215. At this time, the positioning block 327 on the valve stem 32 abuts against the second side surface 2122 of the first positioning groove 212, as Figure 10 shown, the minimum cross-sectional area of the first groove 321 is directly opposite to the inlet 3111 of the flow channel 311. The milk liquid in the box body 1 flows out into the mixing cavity 7 under the action of negative pressure in sequence through the milk inlet pipe 4, the inlet 3111 of the flow channel 311, the first groove 321, the milk outlet channel 325, the second groove 323, the outlet 3112 of the flow channel 311, and the milk outlet pipe 5. The milk liquid flow rate is the smallest, and the steam, milk liquid, and air meet and mix in the mixing cavity 7, and the milk foam is discharged from the milk foam outlet 74. At this time, the milk foam temperature is the highest. The handheld knob 328 continues to drive the valve stem 32 to rotate along the first rotation direction to the third position mark 3283 to align with the indicating bar 215, and the positioning block 327 on the valve stem 32 is inserted into the second positioning groove 214 along the guide groove 213, as Figure 11 shown, the outer wall of the valve stem 32 blocks the inlet 3111 of the flow channel 311, closing the flow channel 311, and the milk liquid in the box body 1 cannot be sucked out.

[0060] The above is only the preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A milk box for a coffee machine, characterized in that, It includes a box body (1) and a box cover (11), and the box cover (11) is detachably arranged on the box body (1). A valve seat (2) is provided on the box cover (11), a regulating valve (3) is detachably arranged in the valve seat (2), a flow channel (311) is arranged in the regulating valve (3), a milk inlet pipe (4) is detachably connected to the inlet (3111) of the flow channel (311), and a milk outlet pipe (5) is detachably connected to the outlet (3112) of the flow channel (311). The regulating valve (3) is used to regulate the flow rate of the milk liquid in the flow channel (311).

2. The milk box of the coffee machine according to claim 1, characterized in that, The regulating valve (3) includes a valve body (31) and a valve rod (32), the flow channel (311) is formed on the valve body (31), the valve rod (32) is rotatably arranged on the flow channel (311), and the axis of the valve rod (32) is arranged vertically to the direction of the flow channel (311).

3. The milk box of the coffee machine according to claim 2, wherein, On the outer wall circumference of the valve rod (32), a first groove (321), a milk inlet (322), a second groove (323), and a milk outlet (324) are sequentially arranged along a first rotation direction. The first groove (321) communicates with the milk inlet (322), and the second groove (323) communicates with the milk outlet (324). A milk outlet channel (325) is radially arranged in the valve rod (32), and both ends of the milk outlet channel (325) communicate with the milk inlet (322) and the milk outlet (324) respectively; the cross-sectional area of the first groove (321) gradually decreases starting from the milk inlet (322).

4. The coffee machine milk box according to claim 3, characterized in that, The cross-sectional area of the second groove (323) gradually decreases starting from the milk outlet (324).

5. The coffee machine milk box according to claim 4, characterized in that The width and / or depth of the first groove (321) gradually decreases starting from the milk inlet (322); the width and / or depth of the second groove (323) gradually decreases starting from the milk outlet (324).

6. The milk box of the coffee machine according to claim 3, characterized in that A mounting port (21) is horizontally arranged on the valve seat (2), and the first end of the valve rod (32) passes through the mounting port (21) and is inserted into the valve body (31); the second end of the valve rod (32) passes through the mounting port (21) and extends to the outside.

7. The milk box of the coffee machine according to claim 6, characterized in that, The valve body (31) is made of a flexible material, a convex ring (326) is arranged on the outer wall circumference of the valve rod (32), and an annular groove (312) matching with the convex ring (326) is arranged on the valve body (31).

8. The milk box of the coffee machine according to claim 7, characterized in that, A positioning groove (211) is arranged on the inner wall of the mounting port (21), and a positioning block (327) that slides in the positioning groove (211) is arranged on the outer wall of the valve rod (32). The positioning groove (211) includes a first positioning groove (212), a guiding groove (213), and a second positioning groove (214) that are sequentially connected along the first rotation direction, and both ends of the guiding groove (213) communicate with the first positioning groove (212) and the second positioning groove (214) respectively. The first side surface (2121) of the first positioning groove (212) is used to position the valve stem (32) at the maximum flow rate position, the second side surface (2122) of the first positioning groove (212) is used to position the valve stem (32) at the minimum flow rate position, and the second positioning groove (214) is used to position the valve stem (32) at the closed flow rate position.

9. The milk box of the coffee machine according to claim 8, characterized in that, A knob (328) is fixedly connected to the second end of the valve stem (32); an indicating strip (215) is provided on the outer wall of the installation port (21), and a first position mark (3281), a second position mark (3282), and a third position mark (3283) are circumferentially provided on the outer wall of the knob (328); When the valve stem (32) is respectively positioned at the maximum flow rate position, the minimum flow rate position, and the closed flow rate position, the first position mark (3281), the second position mark (3282), and the third position mark (3283) are respectively aligned with the indicating strip (215).

10. A milk frother, characterized in that, It includes a main body (6) and the milk box according to any one of claims 1-9. A mixing cavity (7) is provided on the main body (6). A steam interface (71), an air interface (72), a milk liquid interface (73), and a milk foam outlet (74) that are respectively communicated with the mixing cavity (7) are provided on the main body (6). The milk liquid interface (73) is communicated with the milk outlet pipe (5) of the milk box.

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