Milk frothing device and coffee machine
By integrating the milk foam regulating unit and the milk temperature regulating unit into a frother, and using regulating valve rod one and valve rod two to regulate the milk intake and air intake, the problem of complex structure and inconvenient cleaning of existing coffee machine milk frothing devices is solved, and the stability and consistency of milk foam quality are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG XINBAO ELECTRICAL APPLIANCES HLDG CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-05
AI Technical Summary
Existing coffee machine milk frothing devices have complex structures, are cumbersome to assemble and disassemble, are inconvenient to clean, and produce milk foam of unstable and inconsistent quality.
Design a milk foaming device that integrates the milk foam adjustment unit and the milk temperature adjustment unit into the foamer adjustment component. The milk intake and air intake can be adjusted by adjusting valve rod one and adjusting valve rod two respectively, so as to adjust the milk foam temperature and size, and simplify the assembly and disassembly process.
It allows for flexible adjustment of milk foam temperature and size, simplifies the cleaning process, and improves the stability and consistency of milk foam quality.
Smart Images
Figure CN224320524U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coffee machine technology, and specifically to a milk frothing device and a coffee machine. Background Technology
[0002] Many coffee machines on the market are equipped with milk frothers, which froth milk before mixing it with coffee to create specialty coffees. However, the milk frother involves many components and has a complex structure, making it difficult to clean. Furthermore, the manufacturing processes and dimensional precision requirements for each part are high, and it requires multiple testing and control processes. During production, issues such as uncontrollable milk temperature, inconsistent milk foam fineness, and poor foam quality often arise, failing to meet normal consumer demands. The stability of the machine in frothing milk needs further improvement.
[0003] The invention patent with publication number CN118614762A discloses a milk frothing system and a coffee machine. The frother of this prior art has four connecting ends, which are respectively assembled with the milk frothing adjustment part, the milk temperature adjustment part, the steam connector and the milk outlet. The milk frothing adjustment part and the milk temperature adjustment part are two independent components. During assembly, the milk frothing adjustment part is assembled on the upper part of the frother body and then assembled with the first regulating valve rod, while the milk temperature adjustment part is assembled on the lower part of the frother body and then assembled with the milk inlet pipe and the second regulating valve rod. Its structure is complex and the assembly and disassembly are relatively cumbersome, resulting in inconvenient cleaning.
[0004] Therefore, there is still room for improvement and development in existing technologies. Utility Model Content
[0005] To address the problems of complex structures, cumbersome assembly and disassembly, and inconvenient cleaning in existing technologies, this utility model provides a milk frothing device and a coffee machine.
[0006] To achieve the above objectives, the technical solution applied in this utility model is as follows:
[0007] A milk frothing device includes a milk tank assembly and a frothing assembly, the frothing assembly being detachably mounted on the milk tank assembly. The frothing assembly includes a frothing body and a frothing adjustment component. The frothing body has a correspondingly connected mixing chamber and a negative pressure channel formed within it. A milk frothing nozzle and a steam nozzle are connected to both ends of the mixing chamber. The negative pressure channel is correspondingly connected to the frothing adjustment component. The frothing adjustment component has an air inlet and a milk inlet connected to the negative pressure channel, the milk inlet being connected to a milk inlet pipe. The frothing adjustment component is movably equipped with a first adjusting valve rod and a second adjusting valve rod. The first adjusting valve rod is correspondingly configured with the milk inlet to adjust the milk inlet volume; the second adjusting valve rod is correspondingly configured with the air inlet to adjust the air inlet volume. This design allows for the adjustment of milk flow and air flow by rotating regulating valve rod one and regulating valve rod two, respectively. This achieves different air intake sizes and milk flow rates, thereby regulating the milk foam temperature and size, as well as the amount of milk foam mixed with air within a given unit of time during the milk foaming process. This allows for the control of milk temperature and foam size, achieving different foaming effects. Furthermore, the regulating valve rods one and two are integrated into the frother regulating component (comprising the milk foam regulating section and milk temperature regulating section found in existing technologies). This frother regulating component is then assembled onto the frother body. Unlike existing technologies, this design offers easier assembly and disassembly, making cleaning more convenient. Specifically, only the frother body and the frother regulating component need to be assembled and disassembled.
[0008] According to the above scheme, a milk inlet channel is formed between the milk inlet hole and the negative pressure channel. The frother adjustment component is provided with an installation port one, which is correspondingly set with the milk inlet channel. The first end of the adjustment valve rod one is provided with a knob part one, and the second end of the adjustment valve rod one passes through the installation port one and is located in the milk inlet channel. The second end of the adjustment valve rod one is provided with a slot one, a slot two, a milk passage groove, and an air passage groove one. The first end of the slot one is connected to the negative pressure channel, the second end of the slot one is connected to the first end of the slot two, and the second end of the slot two is connected to the milk passage groove and the air passage groove one. When the slot two and the milk inlet hole are connected, a high-flow milk passage channel is formed. When the milk passage groove and the milk inlet hole are connected, a low-flow milk passage channel is formed. The air passage groove one is correspondingly set with the adjustment valve rod two. With this configuration, when the regulating valve rod is rotated to align with slot two and the milk inlet, the milk flow rate is high; when the regulating valve rod is rotated to align with the milk passage and the milk inlet, the milk flow rate is low. Specifically, in the high-flow-rate milk passage, when different positions of the regulating valve rod are rotated to align with the milk inlet, the cross-sectional size of slot two can be adjusted under high flow rate to control the amount of milk foam mixed with air within a certain unit of time, thereby regulating and controlling the milk foaming temperature.
[0009] According to the above scheme, the first slot is located on the second end of the regulating valve stem, and the first slot is coaxially arranged with the negative pressure channel; the two ends of the first slot are arranged with the opening gradually decreasing in size, the larger end of the first slot is connected to the negative pressure channel, and the smaller end of the first slot is connected to the second slot. This arrangement allows the milk inlet pipe to quickly draw milk from the milk box assembly into the frother body when negative pressure is generated in the negative pressure channel.
[0010] According to the above scheme, the second slot is located on the second end sidewall of the regulating valve rod, and the milk passage groove and the first air passage groove are arranged around the outer circle of the regulating valve rod, located on both sides of the second slot. The width and / or depth of the milk passage groove gradually decrease at both ends. The wider end of the milk passage groove is connected to the second slot, and the narrower end is located on the outer circle of the regulating valve rod. With this arrangement, under low flow rate milk passage conditions, rotating the regulating valve rod to different positions of the milk passage groove corresponding to the milk inlet hole allows for adjustment of the cross-sectional size of the milk passage groove under low flow rate conditions. This controls the amount of milk foam mixed with air within a certain unit of time, thereby regulating and controlling the milk foaming temperature. That is, the closer the milk passage groove is to the second slot, the greater the milk flow rate; the farther away the milk passage groove is from the second slot, the smaller the milk flow rate.
[0011] According to the above scheme, the regulating valve stem is provided with a limiting sealing assembly that cooperates with and limits the installation port. The limiting sealing assembly includes a limiting ring on the outer circle of the regulating valve stem and a limiting groove on the inner wall of the installation port. The limiting ring and the limiting groove are engaged and locked together. This arrangement allows the regulating valve stem to rotate relative to the installation port without dislodging from it.
[0012] According to the above scheme, an air intake channel is formed between the air inlet and the first air passage. The foamer adjusting component is provided with a second mounting port, which corresponds to the air intake channel. The first end of the second adjusting valve rod is provided with a second knob, and the second end of the second adjusting valve rod passes through the second mounting port and is located within the air intake channel. The second end of the second adjusting valve rod is provided with a second air passage and a third air passage. The first end of the second air passage is connected to the air inlet, the second end of the second air passage is connected to the first end of the third air passage, and the second end of the third air passage is connected to the first air passage. With this configuration, when the second adjusting valve rod is rotated until the second air passage aligns with the air inlet, a negative pressure is generated within the foamer body, allowing external air to be drawn into the foamer body.
[0013] According to the above scheme, the second air passage groove is arranged around the outer circle of the second regulating valve rod, and the third air passage groove is vertically arranged on the outer circle of the second regulating valve rod. The width and / or depth of the two ends of the second air passage groove gradually decrease. The wider end of the second air passage groove has a width and / or depth that connects to the third air passage groove, while the narrower end of the second air passage groove has a width and / or depth that is located on the outer circle of the second regulating valve rod. With this arrangement, when the air intake channel is open, rotating the second regulating valve rod to different positions of the second air passage groove and corresponding to the air intake hole allows for adjustment of the cross-sectional size of the second air passage groove. This controls the amount of air mixed with milk foam within a certain unit of time, thereby adjusting and controlling the size of the milk foam. That is, the closer the second air passage groove is to the third air passage groove, the greater the air flow; the farther away the second air passage groove is from the third air passage groove, the smaller the air flow.
[0014] According to the above scheme, a limiting sealing assembly 2 is provided between the regulating valve stem 2 and the mounting port 2. The limiting sealing assembly 2 includes a limiting ring 2 on the outer circle of the regulating valve stem 2 and a limiting groove 2 on the inner wall of the mounting port 2. The limiting ring 2 and the limiting groove 2 are engaged and locked in place. This arrangement allows the regulating valve stem 2 to rotate relative to the mounting port 2 without dislodging from the mounting port 2.
[0015] According to the above scheme, the milk box assembly includes a milk box and a milk box lid. The milk box lid is detachably installed on the milk box opening, and the foaming component is detachably installed on the milk box lid. The milk box lid is provided with milk flow rate markings and air flow rate markings. The first regulating valve rod is provided with an indicator part corresponding to the milk flow rate markings, and the second regulating valve rod is provided with an indicator part corresponding to the air flow rate markings.
[0016] The coffee machine described in this utility model includes the milk frothing device described above.
[0017] The beneficial effects of this utility model are:
[0018] This invention is designed to regulate the milk flow rate and air flow rate by rotating regulating valve rod one and regulating valve rod two, respectively. This allows for different air intake sizes and milk flow rates, thereby adjusting the milk foam temperature and size, as well as the amount of milk foam mixed with air within a given unit of time and the amount of air mixed with milk within a given unit of time. This enables control over the milk temperature and the size of the generated foam, achieving different foaming effects. The regulating valve rods one and two are integrated into a frother regulating component (comprising the milk foam regulating part and milk temperature regulating part found in existing technologies). This frother regulating component is then assembled onto the frother body. Unlike existing technologies, this invention is easier to assemble and disassemble, making cleaning easier. Specifically, only the frother body and the frother regulating component need to be assembled and disassembled. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the foaming component of this utility model;
[0021] Figure 3 This is an exploded view of the foaming component of this utility model;
[0022] Figure 4 This is a vertical sectional view of the foaming component of this utility model;
[0023] Figure 5 This is a cross-sectional view of the foaming component of this utility model;
[0024] Figure 6 This is a schematic diagram of the regulating valve stem of this utility model;
[0025] Figure 7 This is a schematic diagram of the regulating valve stem of this utility model;
[0026] Figure 8 This is a vertical sectional view of the foaming component of this utility model with the air intake volume adjusted to the maximum and the milk intake volume adjusted to the maximum.
[0027] Figure 9 This is a cross-sectional view of the foaming component of this utility model with the air intake volume adjusted to the maximum and the milk intake volume adjusted to the maximum.
[0028] Figure 10 This is a vertical sectional view of the foaming component of this utility model with the air intake volume adjusted to the minimum and the milk intake volume adjusted to the minimum.
[0029] Figure 11 This is a cross-sectional view of the foaming component of this utility model with the air intake volume adjusted to the minimum and the milk intake volume adjusted to the minimum.
[0030] Figure 12 This is a vertical sectional view of the foaming component of this utility model in the states of air intake adjustment to off and milk intake adjustment to off;
[0031] Figure 13 This is a cross-sectional view of the foaming component of this utility model in the states of air intake adjustment being closed and milk intake adjustment being closed.
[0032] In the picture:
[0033] 1. Adjusting valve stem one; 11. Hole one; 12. Hole two; 13. Milk passage trough; 14. Air passage trough one; 15. Knob part one; 16. Indicator part one; 17. Limiting ring one; 2. Adjusting valve stem two; 21. Air passage trough two; 22. Air passage trough three; 23. Knob part two; 24. Indicator part two; 25. Limiting ring two; 3. Foamer body; 31. Mixing chamber; 32. Negative pressure channel; 4. Milk frothing nozzle; 41. Sealing ring one; 5. Foamer adjusting parts; 51. Air inlet; 52. Milk inlet; 53. Installation port one; 54. Installation port two; 6. Milk inlet pipe; 7. Steam nozzle; 71. Sealing ring two; 81. Milk tank; 82. Milk tank lid; 83. Milk flow rate marking scale; 84. Air flow rate marking scale. Detailed Implementation
[0034] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.
[0035] like Figure 1 and Figure 13 As shown, the milk frothing device of this utility model includes a milk tank assembly and a frothing assembly, the frothing assembly being detachably installed on the milk tank assembly; the frothing assembly includes a frothing body 3 and a frothing adjustment component 5, the frothing body 3 having a correspondingly connected mixing chamber 31 and a negative pressure channel 32 formed therein, the two ends of the mixing chamber 31 being connected to a milk frothing nozzle 4 and a steam nozzle 7, the negative pressure channel 32 being correspondingly connected to the frothing adjustment component 5; the frothing adjustment component 5 is provided with an air inlet 51 and a milk inlet 52 communicating with the negative pressure channel 32, the milk inlet 52 being connected to a milk inlet pipe 6; the frothing adjustment component 5 is movably provided with a first adjustment valve rod 1 and a second adjustment valve rod 2, the first adjustment valve rod 1 being correspondingly set with the milk inlet 52 for adjusting the milk intake; the second adjustment valve rod 2 being correspondingly set with the air inlet 51 for adjusting the air intake. This design allows for the adjustment of milk flow and air flow by rotating regulating valve 1 and regulating valve 2, respectively, to achieve different air intake sizes and milk flow rates. This, in turn, regulates the milk foam temperature and foam size, as well as the amount of milk foam mixed with air within a given unit of time and the amount of air mixed with milk within a given unit of time. This enables the control of milk temperature and foam size, achieving different foaming effects. The regulating valve 1 and regulating valve 2 are integrated into the frother regulating component 5 (which includes the milk foam regulating part and milk temperature regulating part found in the prior art). The frother regulating component 5 is then assembled onto the frother body 3. Unlike the prior art, this design allows for easier assembly and disassembly, making cleaning more convenient. Specifically, only the frother body 3 and the frother regulating component 5 need to be assembled and disassembled.
[0036] In practical applications, a sealing ring 41 is provided between the milk frother 4 and the frother body 3 to prevent milk foam from overflowing; a steam sealing ring 71 is provided between the steam nozzle 7 and the frother body 3 to prevent steam from overflowing.
[0037] The working principle of the milk foaming device of this utility model is as follows: When hot steam is introduced through the steam nozzle 7, a negative pressure is generated in the foamer body 3. Under the negative pressure, the milk inlet pipe 6 draws milk from the milk tank assembly 8 into the foamer body 3. At the same time, the foamer adjusting component 5 draws in external air into the foamer body 3 under the negative pressure. After the steam, air and milk in the foamer body 3 are mixed in the mixing chamber 31 in the foamer body 3, the foamed milk is discharged through the nipple 4.
[0038] Furthermore, a milk inlet channel is formed between the milk inlet hole 52 and the negative pressure channel 32. The frother adjustment component 5 is provided with an installation port 53, which is correspondingly set with the milk inlet channel. The first end of the regulating valve rod 1 is provided with a knob part 15, and the second end of the regulating valve rod 1 passes through the installation port 53 and is located in the milk inlet channel. The second end of the regulating valve rod 1 is provided with a slot 11, a slot 2 12, a milk passage groove 13, and an air passage groove 14. The first end of the slot 11 is correspondingly connected to the negative pressure channel 32, the second end of the slot 11 is correspondingly connected to the first end of the slot 2 12, and the second end of the slot 2 12 is correspondingly connected to the milk passage groove 13 and the air passage groove 14. When the slot 2 12 and the milk inlet hole 52 are correspondingly connected, a high-flow-rate milk passage is formed. When the milk passage groove 13 and the milk inlet hole 52 are correspondingly connected, a low-flow-rate milk passage is formed. The air passage groove 14 is correspondingly set with the regulating valve rod 2 2. With this configuration, when the regulating valve rod 1 is rotated to align with the slot 12 and the milk inlet 52, the milk flow rate is high; when the regulating valve rod 1 is rotated to align with the milk passage 13 and the milk inlet 52, the milk flow rate is low. In the high-flow-rate milk passage, when the regulating valve rod 1 is rotated to align with the milk inlet 52 at different positions, the cross-sectional size of the slot 12 can be adjusted under high flow rate to control the amount of milk foam mixed with air within a certain unit of time, thereby regulating and controlling the milk foaming temperature.
[0039] Furthermore, the slot 11 is located on the second end of the regulating valve stem 1, and is coaxially arranged with the negative pressure channel 32. The two ends of the slot 11 are arranged with gradually decreasing openings. The larger opening of the slot 11 is connected to the negative pressure channel 32, and the smaller opening of the slot 11 is connected to the slot 12. This arrangement allows the milk inlet pipe 6 to quickly draw milk from the milk box assembly 8 into the frother body 3 when negative pressure is generated in the negative pressure channel 32.
[0040] Furthermore, the second slot 12 is located on the second end sidewall of the regulating valve stem 1, and the milk passage 13 and the air passage 14 are arranged around the outer circle of the regulating valve stem 1, located on both sides of the second slot 12. The width and / or depth of the milk passage 13 gradually decreases at both ends. The wider end of the milk passage 13 is connected to the second slot 12, and the narrower end is located on the outer circle of the regulating valve stem 1. With this arrangement, under low flow milk passage conditions, rotating the regulating valve stem 1 to different positions of the milk passage 13 corresponding to the milk inlet 52 allows for adjustment of the cross-sectional size of the milk passage 13 under low flow conditions. This controls the amount of milk foam mixed with air within a certain unit of time, thereby regulating and controlling the milk foaming temperature. That is, the closer the milk passage 13 is to the second slot 12, the greater the milk flow rate; the farther away the milk passage 13 is from the second slot 12, the smaller the milk flow rate.
[0041] In practical applications, when the regulating valve rod 1 is rotated until the outer circular wall of the regulating valve rod 1 corresponds to the milk inlet hole 52, that is, when the slot hole 12 and the milk passage slot 13 are misaligned with the milk inlet hole 52, the milk passage is in a closed state.
[0042] Furthermore, the regulating valve stem 1 is provided with a limiting sealing assembly 1 that cooperates with and limits the movement of the mounting port 53. The limiting sealing assembly 1 includes a limiting ring 17 on the outer circle of the regulating valve stem 1 and a limiting groove on the inner wall of the mounting port 53. The limiting ring 17 and the limiting groove 1 are engaged and locked together. This arrangement allows the regulating valve stem 1 to rotate relative to the mounting port 53 without dislodging from the mounting port 53.
[0043] Furthermore, an air intake channel is formed between the air inlet 51 and the air passage 14. The foamer adjusting component 5 is provided with a second mounting port 54, which is correspondingly arranged with the air intake channel. The first end of the second adjusting valve rod 2 is provided with a second knob 23, and the second end of the second adjusting valve rod 2 passes through the second mounting port 54 and is located in the air intake channel. The second end of the second adjusting valve rod 2 is provided with an air passage 21 and an air passage 3 22. The first end of the air passage 21 is connected to the air inlet 51, the second end of the air passage 21 is connected to the first end of the air passage 3 22, and the second end of the air passage 3 22 is connected to the air passage 14. With this arrangement, when the second adjusting valve rod 2 is rotated until the air passage 21 and the air inlet 51 are aligned, a negative pressure is generated in the foamer body 3, which can draw external air into the foamer body 3.
[0044] Furthermore, the second air passage 21 is arranged around the outer circle of the second regulating valve rod 2, and the third air passage 22 is arranged vertically on the outer circle of the second regulating valve rod 2. The width and / or depth of the second air passage 21 gradually decreases at both ends. The wider end of the second air passage 21 is connected to the third air passage 22, and the narrower end of the second air passage 21 is located on the outer circle of the second regulating valve rod 2. With this arrangement, when the air intake channel is open, rotating the second regulating valve rod 2 to different positions of the second air passage 21 and corresponding to the air intake hole 51 adjusts the cross-sectional size of the second air passage 21 to control the amount of air mixed with milk foam within a certain unit of time, thereby adjusting and controlling the size of the milk foam. That is, the closer the second air passage 21 is to the third air passage 22, the greater the air flow; the farther away the second air passage 21 is from the third air passage 22, the smaller the air flow.
[0045] In practical applications, when the regulating valve rod 2 is rotated until the outer circular wall of the regulating valve rod 2 corresponds to the air inlet 51, that is, when the air passage groove 21 and the air inlet 51 are misaligned, the air inlet channel is in a closed state.
[0046] Furthermore, a limiting sealing assembly is provided between the regulating valve stem 2 and the mounting port 54. The limiting sealing assembly includes a limiting ring 25 on the outer circumference of the regulating valve stem 2 and a limiting groove on the inner wall of the mounting port 54. The limiting ring 25 and the limiting groove are engaged and locked in place. This arrangement allows the regulating valve stem 2 to rotate relative to the mounting port 54 without dislodging from it.
[0047] Furthermore, the milk box assembly includes a milk box 81 and a milk box lid 82. The milk box lid 82 is detachably installed on the opening of the milk box 81, and the foaming component is detachably installed on the milk box lid 82. The milk box lid 82 is provided with a milk flow rate marking 83 and an air flow rate marking 84. The regulating valve rod 1 is provided with an indicator part 16 corresponding to the milk flow rate marking 83, and the regulating valve rod 2 is provided with an indicator part 24 corresponding to the air flow rate marking 84.
[0048] The coffee machine described in this utility model includes the milk frothing device described above.
[0049] The working principle of the coffee machine described in this utility model is as follows:
[0050] When the coffee machine generates steam by simultaneously controlling the heating pot and the water pump to supply water, the generated steam enters the frother body 3 through the steam nozzle 7 to froth the milk. Due to the Venturi effect, the negative pressure formed inside the frother body 3 by the steam enters the frother body 3, and the milk and air are drawn into the mixing chamber 31 inside the frother body 3 through the negative pressure channel 32, and mixed with the temperature of the steam to form foam. The foamed milk foam flows out through the milk foam nozzle 4.
[0051] During the milk frothing process, by rotating the regulating valve rod 1 clockwise or counterclockwise, the size of the cross-sectional hole of the channel that mates with the regulating valve rod 1 and the frother 5 changes accordingly, thereby making the channel between the milk inlet pipe 6 and the mixing chamber 31 of the frother body 3 larger, smaller, or closed.
[0052] When the steam creates a certain negative pressure inside the frother body 3, the larger the cross-section of the adjustable milk tank 13 and the milk inlet 52, the smaller the resistance of the milk entering the mixing chamber 31 of the frother body 3 through the negative pressure. The more milk enters the mixing chamber 31 of the frother body 3 for foaming in a certain unit of time, and the lower the temperature of the milk foam after mixing with steam and air when the steam provides a certain amount of heat.
[0053] When the steam creates a certain negative pressure inside the frother body 3, the smaller the cross-section of the adjustable milk tank 13 and the milk inlet 52, the greater the resistance of the milk entering the mixing chamber 31 of the frother body 3 through the negative pressure. The less milk enters the mixing chamber 31 of the frother body 3 for foaming in a certain unit of time, and the higher the temperature of the milk foam after mixing with steam and air when the steam provides a certain amount of heat.
[0054] When a certain negative pressure is formed inside the frother body 3 by steam or hot water, the cross-section of the adjustable milk tank 13 and the milk inlet 52 can be reduced to the smallest size and closed. The milk channel that enters the mixing chamber 31 of the frother body 3 by negative pressure is closed. No milk enters the mixing chamber 31 of the frother body 3 within a certain unit of time. At this time, the residual milk in the frother body 3 can be cleaned directly by steam or hot water, thereby achieving the cleaning effect of the frother body 3 and the milk frothing nipple 4.
[0055] During the milk frothing process, by rotating the regulating valve rod 2 clockwise or counterclockwise, the size of the channel cross-section hole that cooperates with the regulating valve rod 2 and the frother 5 changes accordingly, thereby making the channel connecting the outside air and the mixing chamber 31 of the frother body 3 larger, smaller, or closed.
[0056] When the steam forms a certain negative pressure inside the foamer body 3, the larger the cross-section of the adjustable air passage 21 and the air inlet 51, the smaller the air resistance drawn into the mixing chamber 31 of the foamer body 3 through the negative pressure. The more air is drawn into the mixing chamber 31 of the foamer body 3 for foaming within a certain unit of time, the more air is drawn in. With a certain amount of milk, the more air is mixed, the larger the milk foam after foaming.
[0057] When the steam forms a certain negative pressure inside the foamer body 3, the smaller the cross-section of the adjustable air passage 21 and the air inlet 51, the greater the air resistance drawn into the mixing chamber 31 of the foamer body 3 through the negative pressure. The less air is drawn into the mixing chamber 31 of the foamer body 3 for foaming within a certain unit of time, the less air is drawn in. With a certain amount of milk, the less air is mixed, the smaller and finer the foamed milk foam will be.
[0058] When the steam creates a certain negative pressure inside the foamer body 3, the adjustable air passage 21 and the air inlet 51 cooperate to form a cross-sectional hole so small that it is closed. The air passage that is drawn into the mixing chamber 31 of the foamer body 3 by the negative pressure is closed. When the air enters the mixing chamber 31 of the foamer body 3 for foaming within a certain unit time, no air enters the mixing. At this time, only steam and milk are mixed in the mixing chamber 31 of the foamer body 3. At this time, the foamed milk has no milk foam, only the temperature rises to form hot milk.
[0059] The embodiments of the present utility model have been described above with reference to the accompanying drawings. However, the present utility model is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present utility model without departing from the spirit and scope of the claims, and all of these forms are within the scope of protection of the present utility model.
Claims
1. A milk frothing device, characterized in that: It includes a milk box assembly and a foaming assembly, wherein the foaming assembly is detachably mounted on the milk box assembly; The foaming assembly includes a foamer body (3) and a foamer adjusting component (5). The foamer body (3) has a correspondingly connected mixing chamber (31) and a negative pressure channel (32). The two ends of the mixing chamber (31) are connected to a milk frother (4) and a steam nozzle (7). The negative pressure channel (32) is correspondingly connected to the foamer adjusting component (5). The foamer adjustment component (5) is provided with an air inlet (51) and a milk inlet (52) that are connected to the negative pressure channel (32), and the milk inlet (52) is connected to a milk inlet tube (6); The foamer adjustment component (5) is movably provided with an adjustment valve rod one (1) and an adjustment valve rod two (2). The adjustment valve rod one (1) is configured to correspond to the milk inlet hole (52) for adjusting the milk inlet amount; the adjustment valve rod two (2) is configured to correspond to the air inlet hole (51) for adjusting the air inlet amount.
2. The milk frothing device according to claim 1, characterized in that: A milk inlet channel is formed between the milk inlet hole (52) and the negative pressure channel (32). The frother adjustment component (5) is provided with an installation port (53), which is correspondingly set with the milk inlet channel. The first end of the regulating valve rod (1) is provided with a knob (15), and the second end of the regulating valve rod (1) passes through the installation port (53) and is located in the milk inlet channel. The second end of the regulating valve rod (1) is provided with a slot (11), a slot (12), a milk passage groove (13), and an air passage groove (14). The first end of the first slot (11) is connected to the negative pressure channel (32), the second end of the first slot (11) is connected to the first end of the second slot (12), the second end of the second slot (12) is connected to the milk passage (13) and the air passage (14); when the second slot (12) and the milk inlet (52) are connected, a large flow milk passage is formed; when the milk passage (13) and the milk inlet (52) are connected, a small flow milk passage is formed; the air passage (14) is correspondingly set with the regulating valve rod (2).
3. The milk frothing device according to claim 2, characterized in that: The first slot (11) is located on the second end of the regulating valve stem (1), and the first slot (11) is coaxially arranged with the negative pressure channel (32). The openings at both ends of the first slot (11) are arranged to gradually decrease in size. The larger opening of the first slot (11) is connected to the negative pressure channel (32), and the smaller opening of the first slot (11) is connected to the second slot (12).
4. The milk frothing device according to claim 2, characterized in that: The second slot (12) is located on the second end side wall of the regulating valve rod (1). The milk passage groove (13) and the air passage groove (14) are arranged around the outer circle of the regulating valve rod (1). The milk passage groove (13) and the air passage groove (14) are located on both sides of the second slot (12). The width and / or depth of the two ends of the milk passage groove (13) are gradually decreasing. The width and / or depth of the larger end of the milk passage groove (13) is connected to the second slot (12). The width and / or depth of the smaller end of the milk passage groove (13) is located on the outer circle of the regulating valve rod (1).
5. A milk frothing device according to claim 2, characterized in that: The regulating valve stem (1) is provided with a limiting sealing assembly that cooperates with the installation port (53) for limiting. The limiting sealing assembly includes a limiting ring (17) on the outer circle of the regulating valve stem (1) and a limiting groove on the inner wall of the installation port (53). The limiting ring (17) and the limiting groove cooperate to lock in place.
6. A milk frothing device according to claim 2, characterized in that: An air intake channel is formed between the air inlet (51) and the first air passage (14). The foamer adjustment component (5) is provided with an installation port (54), which is correspondingly set with the air intake channel. The first end of the second regulating valve rod (2) is provided with a knob part (23), and the second end of the second regulating valve rod (2) passes through the second installation port (54) and is located in the air intake channel. The second end of the second regulating valve rod (2) is provided with an air passage groove (21) and an air passage groove (22). The first end of the second air passage groove (21) is connected to the air inlet (51), the second end of the second air passage groove (21) is connected to the first end of the third air passage groove (22), and the second end of the third air passage groove (22) is connected to the first air passage groove (14).
7. A milk frothing device according to claim 6, characterized in that: The second air passage groove (21) is arranged around the outer circle of the second regulating valve rod (2), and the third air passage groove (22) is arranged vertically on the outer circle of the second regulating valve rod (2). The width and / or depth of the two ends of the second air passage groove (21) gradually decreases. The width and / or depth of the larger end of the second air passage groove (21) is connected to the third air passage groove (22), and the width and / or depth of the smaller end of the second air passage groove (21) is located on the outer circle of the second regulating valve rod (2).
8. A milk frothing device according to claim 6, characterized in that: A limiting sealing assembly is provided between the regulating valve stem 2 (2) and the installation port 2 (54). The limiting sealing assembly includes a limiting ring 2 (25) on the outer circle of the regulating valve stem 2 (2) and a limiting groove 2 on the inner wall of the installation port 2 (54). The limiting ring 2 (25) and the limiting groove 2 cooperate to lock in place.
9. A milk frothing device according to claim 1, characterized in that: The milk box assembly includes a milk box (81) and a milk box lid (82). The milk box lid (82) is detachably installed on the opening of the milk box (81), and the foaming component is detachably installed on the milk box lid (82). The milk box lid (82) is provided with a milk flow rate marking (83) and an air flow rate marking (84). The first regulating valve rod (1) is provided with an indicator part (16) corresponding to the milk flow rate marking (83), and the second regulating valve rod (2) is provided with an indicator part (24) corresponding to the air flow rate marking (84).
10. A coffee machine, characterized in that: Includes the milk frothing device according to any one of claims 1-9.