Foaming equipment

Abstract

The utility model discloses foaming equipment which comprises a tubular body, the tubular body comprises a mixing chamber, at least one liquid supply channel and a gas supply channel which are communicated with the mixing chamber, the tubular body is provided with a feeding end and a discharging end, the feeding end is used for being communicated with a steam source, and mixed fluid in the mixing chamber is output from the discharging end; the gas supply channel is connected with a gas supply amount adjusting mechanism and comprises a first section extending in the first direction, a mounting opening facing the second direction is formed in the first section, an angle is formed between the second direction and the first direction, and the gas supply amount adjusting mechanism extends into the channel of the first section from the mounting opening. The gas supply amount adjusting mechanism comprises a gas switching piece and a base body matched with the switching piece, a gas seam is formed between the gas switching piece and the base body, the gas supply channel establishes a gas supply path to the mixing cavity through the gas seam, and the gas switching piece operably moves relative to the base body to adjust the communication area of the gas seam.

Description

Technical Field

[0001] The utility model relates to the technical field of beverage preparation, in particular to a foaming device. Background Art

[0002] Modern coffee machines are often provided with a frothing device for preparing milk foam or hot milk. The frothing device is usually connected to a steam delivery connector provided on the coffee machine. The frothing device includes a milk delivery pipe, an air pipe, a steam pipe and a mixing chamber. The milk delivery pipe, the air pipe and the steam pipe are all connected to the mixing chamber, and the mixing chamber has an output port. When in use, steam enters the mixing chamber from the steam pipe, forms a negative pressure in the mixing chamber, drives the milk to flow into the mixing chamber, and the air is sucked into the mixing chamber through the air inlet pipe, and is mixed with the milk in the mixing chamber to form milk foam, which finally flows out from the output port, and is used for making milk coffee.

[0003] As consumers pursue more and more diverse coffee flavors, in order to cater to people's various tastes, coffee machines are also becoming more and more diverse and can also adjust milk foaming. The existing milk foaming mechanism mainly adjusts the size of milk foaming by controlling the size of the air supply. The method for achieving air supply control is also mainly to set an air intake sealing rib at the air intake end of the foaming body, set an air intake groove with a variable cross-section on the adjustment rod installed at the air intake end, and rotate the adjustment rod to align the air intake groove with the air intake sealing rib to introduce air into the foaming body, and adjust the air supply by adjusting the size of the alignment area between the air intake groove and the air intake sealing rib. This air supply adjustment method is difficult to control the matching clearance between the adjustment rod and the air intake sealing rib it contacts, such as the sealing rib will sink into the air intake groove, and the processability is poor. Therefore, the adjustment accuracy of the air supply is very poor, and the milk foam is very sensitive to the change of the air supply. If the air volume is slightly more or less, the size of the milk foam will change. Therefore, this adjustment method is unstable in the quality of the milk foam and poor in product consistency, which cannot meet the user's pursuit of coffee taste. Utility Model Content

[0004] The utility model aims to provide a foaming device which is reliable in use.

[0005] To achieve the above-mentioned utility model object, the utility model provides a foaming device, comprising a tubular body, the tubular body comprising a mixing chamber, at least one liquid supply channel and a gas supply channel connected to the mixing chamber, the tubular body having a feed end and a discharge end, the feed end is used to connect to a steam source, the at least one liquid supply channel is used to connect to a liquid storage source and introduce liquid into the mixing chamber, the gas supply channel is used to introduce air into the mixing chamber, under the action of negative pressure generated by steam flowing in the tubular body, the liquid or liquid and gas are drawn into the mixing chamber, and the mixed fluid in the mixing chamber is output from the discharge end;

[0006] The gas supply channel is connected to a gas supply volume regulating mechanism, the gas supply channel includes a first section extending along a first direction, the first section is provided with a mounting opening facing a second direction, the second direction is set at an angle to the first direction, the gas supply volume regulating mechanism extends from the mounting opening into the interior of the channel of the first section, the gas supply volume regulating mechanism includes a gas switching component and a substrate cooperating with the switching component, an air gap is formed between the gas switching component and the substrate, the gas supply channel establishes a gas supply path to the mixing chamber through the air gap, the gas switching component can be operated relative to the substrate to change the gas supply volume from the gas supply channel to the mixing chamber by adjusting the connecting area of ​​the air gap.

[0007] As a further improvement of one embodiment of the utility model, a connecting groove penetrating along the first direction is formed on the base, and a protrusion that fits the bottom of the connecting groove is provided on the switching member, and the air gap is formed between the protrusion and the side wall of the connecting groove. The gas switching member rotates to drive the protrusion, so that the distance between the outer peripheral surface of the protrusion and the side wall of the connecting groove changes.

[0008] As a further improvement of an embodiment of the utility model, the protrusion has an elliptical outer peripheral surface or a cam-shaped outer peripheral surface, the groove bottom of the connecting groove is provided with a protrusion, and the protrusion is attached to the protrusion.

[0009] As a further improvement of one embodiment of the utility model, the gas supply channel also includes a second section extending along the second direction, the first section and the second section are arranged along the air inflow direction, and the gas switching component rotates relative to the base around an axis perpendicular to the first direction.

[0010] As a further improvement of one embodiment of the utility model, it also includes a tank body and a cover assembly arranged on the top of the tank body, the tank body has a liquid storage cavity for containing liquid, and the tubular body is arranged on the cover assembly; the interior of the cover assembly is provided with a bracket supporting the first section, the exterior of the cover assembly is provided with an operating part connected to the gas switching component, the cover assembly is provided with a through hole corresponding to the installation opening position, and the operating part is connected to the gas switching component through the through hole.

[0011] As a further improvement of one embodiment of the utility model, a fixing piece is connected to the bracket, a hook is extended from the fixing piece toward the bracket, a corresponding slot is provided on the bracket, the hook is inserted into the corresponding slot to connect the fixing piece to the bracket, the operating part is connected to the fixing piece, and the fixing piece limits the gas switching part from being away from the base through the operating part.

[0012] As a further improvement of one embodiment of the utility model, it also includes an operating part connected to the gas switching part and a liquid switching part, the liquid switching part is connected to the liquid supply channel, the liquid switching part moves relative to the liquid supply channel to change the liquid supply amount from the liquid supply channel to the mixing chamber, and the operating part can be operated to synchronously drive the liquid switching part and the gas switching part.

[0013] As a further improvement of one embodiment of the utility model, the operating part is constructed as a knob, a cam groove is provided on the outer circumference of the knob, and the liquid switching component is provided with a guide column inserted into the cam groove. While the knob drives the gas switching component to rotate, the guide column drives the liquid switching component to move in a straight line under the guidance of the cam groove.

[0014] As a further improvement of one embodiment of the utility model, the operating part drives the gas switching component to rotate to change the gas supply amount, and the operating part drives the liquid switching component to move to change the liquid supply amount, and the liquid supply amount of the at least one liquid supply channel and the gas supply amount of the gas supply channel are in a preset corresponding relationship.

[0015] As a further improvement of an embodiment of the utility model, an assembly opening is provided on the at least one liquid supply channel, the liquid switching component extends from the assembly opening into the at least one liquid supply channel, and the assembly opening and the installation opening have the same direction.

[0016] As a further improvement of one embodiment of the utility model, a through port cooperating with the liquid switching element is provided in the at least one liquid supply channel, and the liquid switching element changes the liquid supply amount of the at least one liquid supply channel by adjusting the fluid passage area of ​​the through port.

[0017] Compared with the prior art, the beneficial effects of the utility model are: by installing a gas supply volume adjustment mechanism, the connection area of ​​the gas gap can be changed by operating the gas switching component, the installation direction of the gas supply volume adjustment mechanism is at an angle to the extension direction of the corresponding gas supply channel, the gas switching component and the base have high matching accuracy, so that the gas supply volume is more accurately adjusted, the quality of the milk foam generated by the foaming equipment is stable, the product consistency is good, and milk foam of different fineness can be selected, thereby satisfying the user's pursuit of coffee taste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a foaming device according to one embodiment of the utility model.

[0019] Figure 2 yes Figure 1 Schematic diagram of the exploded view of the foaming equipment in FIG.

[0020] Figure 3yes Figure 1 Schematic cross-sectional view of the foaming equipment along line AA.

[0021] Figure 4 yes Figure 3 An enlarged schematic diagram of part a of the foaming equipment.

[0022] Figure 5 yes Figure 4 Schematic diagram of the gas switching element and the base body of the foaming equipment forming the gas gap.

[0023] Figure 6 yes Figure 4 A three-dimensional schematic diagram of the gas switching components of the foaming device.

[0024] Figure 7 yes Figure 4 A three-dimensional schematic diagram of the base of the foaming device.

[0025] Figure 8 yes Figure 1 Schematic side view of the foaming device in FIG.

[0026] Fig. 9 yes Figure 8 Schematic cross-sectional view of the foaming equipment along line BB. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0028] It should be understood that the terms used herein, such as "upper", "above", "lower", "below", etc., indicating spatial relative positions, are used for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the drawings. The terms of spatial relative positions may be intended to include different orientations of the device in use or operation other than the orientation shown in the drawings.

[0029] The foaming device in the specific implementation mode of the present invention is described by taking the foaming device 100 used in conjunction with a coffee machine as an example. Figures 1 to 3As shown, in this embodiment, the foaming device 100 includes a tubular body 10, which is configured as a hollow element. The tubular body 10 includes a mixing chamber 11, and at least one liquid supply channel 12 and a gas supply channel 13 are connected to the mixing chamber 11. The tubular body 10 has a feed end and a discharge end, the feed end is used to connect to a steam source, the at least one liquid supply channel 12 is used to connect to a liquid storage source and introduce liquid into the mixing chamber 11, and the gas supply channel 13 is used to introduce air into the mixing chamber 11. Under the action of negative pressure generated by steam flowing in the tubular body 10, liquid or liquid and gas are drawn into the mixing chamber 11, and the mixed fluid in the mixing chamber 11 is output from the discharge end. The tubular body 10 constitutes a venturi tube. When steam is ejected, a partial vacuum can be generated in the mixing chamber 11. Under the action of negative pressure, the milk in the liquid storage source will be sucked in and mixed with the steam and air. In this process, the steam, milk and air are fully and evenly mixed, so that fine milk foam can be formed and discharged from the discharge end.

[0030] The tubular body 10 is connected to the steam nozzle 20, which is sealed with the tubular body 10 through a sealing ring. The steam nozzle 20 is adapted to the contraction portion 113 of the venturi tube through a conical nozzle head, so that the steam flow will form a vacuum in the mixing chamber 11 of the venturi tube after passing through the steam nozzle 20, and the vacuum can ensure that air and milk are effectively sucked into the mixing chamber 11. The mixing chamber 11 includes a first mixing chamber 111, and the contraction portion 113 is arranged at the end of the first mixing chamber 111. When steam is ejected, a partial vacuum is generated in the first mixing chamber 111, and under the action of negative pressure, milk in the liquid storage source will be sucked in to mix with steam and air.

[0031] Preferably, the mixing chamber 11 may include a first mixing chamber 111 and a second mixing chamber 112 sequentially arranged along the direction from fluid input to output. The milk foam after frothing in the first mixing chamber 111 enters the second mixing chamber 112 under the inertia and subsequent steam push. The steam, milk and air in the second mixing chamber 112 are further mixed to obtain sufficient and uniformly compact milk foam, and the degree of frothing increases accordingly. The formed milk foam will be discharged from the discharge end. The discharge end can be connected to the outlet pipe 15 and output to the user's beverage cup through the outlet pipe 15.

[0032] Furthermore, the gas supply channel 13 is connected to a gas supply amount adjustment mechanism, and the gas supply channel 13 includes a first section 131 extending along a first direction, and a mounting opening 133 facing a second direction is provided on the first section 131, wherein the second direction is arranged at an angle to the first direction, and the gas supply amount adjustment mechanism extends from the mounting opening 133 into the channel interior of the first section 131. The gas supply amount adjustment mechanism includes a gas switching member 31 and a base body 32 matched with the gas switching member 31, and an air gap 33 is formed between the gas switching member 31 and the base body 32 (refer to Figure 5 ), the gas supply channel 13 establishes a gas supply path to the mixing chamber 11 through the gas gap 33, and the gas switching member 31 is operable to move relative to the base 32 to change the gas supply amount from the gas supply channel 13 to the mixing chamber 11 by adjusting the connecting area of ​​the gas gap 33.

[0033] By installing a gas supply volume adjustment mechanism, the connection area of ​​the gas gap 33 can be changed by operating the gas switching member 31. The installation direction of the gas supply volume adjustment mechanism is at an angle to the extension direction of the corresponding gas supply channel. The gas switching member 31 and the base 32 have high matching accuracy, so that the gas supply volume can be adjusted more accurately. The quality of the milk foam generated by the foaming equipment is stable, the product consistency is good, and milk foam of different fineness can be selected, thereby satisfying the user's pursuit of coffee taste.

[0034] Reference Figures 4 to 7 A connecting groove 321 penetrating along the first direction is formed on the base 32, a protrusion 311 is provided on the gas switching member 31 to fit the bottom of the connecting groove 321, an air gap 33 is formed between the protrusion 311 and the side wall of the connecting groove 321, and the gas switching member 31 rotates to drive the protrusion 311, so that the distance between the outer peripheral surface of the protrusion 311 and the side wall of the connecting groove 321 changes. The air gap 33 is formed between the outer peripheral surface of the protrusion 311 and the side wall surface of the connecting groove 321, which can be more precise in process and convenient to manufacture, and can reduce the manufacturing cost while better controlling the gas supply.

[0035] In this embodiment, preferably, the protrusion 311 has an elliptical outer peripheral surface or a cam-shaped outer peripheral surface, and the bottom of the connecting groove 321 is provided with a protrusion 322, and the protrusion 311 is attached to the protrusion 322. The protrusion 311 is provided with an elliptical outer peripheral surface or a cam-shaped outer peripheral surface, so that the protrusion 311 can achieve a regular change in the area of ​​the air gap 33 during the rotation process. The protrusion 322 at the bottom of the groove fits with the protrusion 311, which can better seal the gap between the protrusion 311 and the bottom of the groove, ensuring that air can only pass through the air gap 33, and ensuring the consistency of the air supply.

[0036] The gas supply channel 13 further includes a second section 132 extending along the second direction, the first section 131 and the second section 132 are arranged along the air inflow direction, and the gas switching element 31 rotates relative to the base 32 around an axis perpendicular to the first direction. The gas supply channel 13 is composed of two sections at an angle, which can provide sufficient space for the arrangement of the gas switching element 31 and the base 32, and the arrangement between the gas supply amount adjustment mechanism and the gas supply channel 13 is more compact.

[0037] Continue to refer to Figure 2 In this embodiment, the foaming device is configured as a milk tank, which includes a tank body 2 and a cover assembly 1 disposed on the tank body 2. The tank body 2 has a liquid storage cavity for containing liquid, and a tubular body 10 is disposed on the cover assembly 1; a bracket 41 supporting the first section 131 is disposed inside the cover assembly 1, and an operating portion 50 connected to the gas switching member 31 is disposed outside the cover assembly 1. A through hole 51 corresponding to the position of the mounting opening 133 is disposed on the cover assembly 1, and the operating portion 50 is connected to the gas switching member 31 through the through hole 51. The gas supply amount can be adjusted by directly operating the operating portion 50 on the milk tank, and a gear mark can be disposed around the operating portion 50 for easy adjustment. The tubular body 20 is disposed on the cover assembly 1, and the space of the cover assembly 1 can be utilized to make the overall structure of the milk tank simple and compact. Among them, the cover assembly 1 includes an upper cover 110 and a lower cover 120, and a accommodating space is defined between the upper cover 110 and the lower cover 120. The tubular body 10 is arranged in the accommodating space, and the gas supply channel 13 is also arranged in the accommodating space to prevent external foreign matter from entering the mixing chamber 11 from the gas supply channel 13.

[0038] The first section 131 of the gas supply channel 13 can be supported on the bracket 41, and the bracket 41 is connected to the fixing member 42, and the fixing member 42 presses the gas switching member 31 toward the base 32. A hook 421 extends from the fixing member 42 toward the bracket 41, and a corresponding slot 411 is provided on the bracket 41. The hook 421 is inserted into the corresponding slot 411 to connect the fixing member 42 to the bracket 41, and the gas switching member 31 is limited by the fixing member 42. Preferably, the operating part 50 is connected to the fixing member 42, and the operating part 50 is limited by the fixing member 42 along the rotation axis of the gas switching member 31. The fixing member 42 clamps the operating part 50 in the axial direction, and presses the gas switching member 31 through the operating part 50, that is, the fixing member 42 limits the gas switching member 31 from being away from the base 32 through the operating part 50, ensuring that the gas switching member 31 is in close contact with the bottom of the connecting slot 321 on the base 32.

[0039] Furthermore, the foaming device 100 further includes a liquid switching member 61, which is connected to the liquid supply channel 12. The liquid switching member 61 moves relative to the liquid supply channel 12 to change the amount of liquid supplied from the liquid supply channel 12 to the mixing chamber 11. The operating part 50 can be operated to synchronously drive the liquid switching member 61 and the gas switching member 31. Through the operating member 50, not only the gas supply amount can be changed, but also the liquid supply amount can be changed synchronously. The gas supply amount and the liquid supply amount are changed at the same time, and milk foams with different temperatures and guaranteed quality can be generated, and the output of hot and cold milk foams can be realized, which can meet the needs of different users for more flavors. For example, cold milk foams with a temperature range of 10°C to 30°C and hot milk foams with a temperature range of 40°C to 70°C.

[0040] In this embodiment, the operating part 50 is configured as a knob, and a cam groove 52 is provided on the outer circumference of the knob, and a guide column 62 inserted into the cam groove 52 is provided on the liquid switching member 61. When the knob drives the gas switching member 31 to rotate, the guide column 62 drives the liquid switching member 61 to move linearly under the guidance of the cam groove 52. The knob drives the gas switching member 31 to rotate and drives the liquid switching member 61 to move linearly, which can realize the synchronous movement of the two switching members, and facilitate the adjustment of the corresponding relationship between the gas supply and the liquid supply. For example, as the liquid supply increases, the gas supply increases synchronously. The knob can be adjusted according to the gear position, and the user only needs to select the corresponding gear position to get a drink of the appropriate temperature.

[0041] In this embodiment, the operating part 50 drives the gas switching member 31 to rotate to change the gas supply amount, and the operating part 50 drives the liquid switching member 61 to move to change the liquid supply amount. The liquid supply amount of the liquid supply channel 12 and the gas supply amount of the gas supply channel 13 are in a preset corresponding relationship. The preset corresponding relationship means that as the operating part 50 is adjusted in one direction, the change of the gas supply amount and the liquid supply amount increases the temperature of the output milk foam; when the operating part 50 is adjusted in another opposite direction, the change of the gas supply amount and the liquid supply amount decreases the temperature of the output milk foam. Specifically, when the milk supply cross-sectional area is less than or equal to the first preset value, as the gas supply cross-sectional area increases, the temperature of the output milk foam increases; when the milk supply cross-sectional area is greater than or equal to the second preset value, as the gas supply cross-sectional area increases, the temperature of the output milk foam decreases, wherein the second preset value is greater than twice the first preset value. By setting the correspondence between the liquid supply amount and the gas supply amount, the output of milk foam of different temperatures, hot and cold, can be obtained, and the quality of the output milk foam is stable. The operating part 50 may drive the gas switching component 31 and the liquid switching component 61 by directly driving the gas switching component 31 and the liquid switching component 61; or the operating part 50 may directly drive the gas switching component 31, and the gas switching component 31 may then drive the liquid switching component 61; or the operating part 50 may directly drive the liquid switching component 61, and the liquid switching component 61 may then drive the gas switching component 31. As long as the synchronous movement of the gas switching component 31 and the liquid switching component 61 can be achieved, it will be sufficient.

[0042] Among them, with reference Figure 8 and Fig. 9 , an assembly opening 122 is provided on the liquid supply channel 12, and the liquid switching component 61 extends into the liquid supply channel 12 from the assembly opening 122, and the assembly opening 122 and the installation opening 133 are oriented in the same direction. The assembly opening 122 and the installation opening 133 are arranged in the same direction, so that it is convenient to connect the knob with the liquid switching component 31 and the gas switching component 61 at the same time, and the assembly is convenient and the structure is reliable. A through port 123 that cooperates with the liquid switching component 61 is provided in the liquid supply channel 12, and the liquid switching component 61 changes the liquid supply amount of the liquid supply channel 12 by adjusting the fluid passage area of ​​the through port 123. By adjusting the fluid passage area of ​​the through port 123, stepless regulation of the liquid flow rate can be achieved, providing users with more choices.

[0043] In the above embodiment, by providing a gas supply volume regulating mechanism and installing the gas supply volume regulating mechanism along a direction which is an angle with the extension direction of the gas supply channel, the connection area of ​​the gas gap can be changed by operating the activity of the gas switching member. The switching member and the base body have high matching accuracy, so that the gas supply volume can be adjusted more accurately, the quality of the milk foam generated by the foaming equipment is stable, the product consistency is good, and milk foams of different fineness can be selected, thereby satisfying the user's pursuit of coffee taste.

[0044] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0045] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A foaming device, comprising a tubular body, the tubular body comprising a mixing chamber, at least one liquid supply channel and a gas supply channel communicating with the mixing chamber, the tubular body having a feed end and a discharge end, the feed end being used to communicate with a steam source, the at least one liquid supply channel being used to communicate with a liquid storage source and introduce liquid into the mixing chamber, the gas supply channel being used to introduce air into the mixing chamber, the liquid or liquid and gas being drawn into the mixing chamber under the effect of negative pressure generated by steam flowing in the tubular body, and the mixed fluid in the mixing chamber being discharged from the discharge end; It is characterized in that The gas supply channel is connected to a gas supply volume regulating mechanism, the gas supply channel includes a first section extending along a first direction, the first section is provided with a mounting opening facing a second direction, the second direction is set at an angle to the first direction, the gas supply volume regulating mechanism extends from the mounting opening into the interior of the channel of the first section, the gas supply volume regulating mechanism includes a gas switching component and a substrate cooperating with the gas switching component, an air gap is formed between the gas switching component and the substrate, the gas supply channel establishes a gas supply path to the mixing chamber through the air gap, the gas switching component can be operated relative to the substrate to change the gas supply volume from the gas supply channel to the mixing chamber by adjusting the connecting area of ​​the air gap.

2. The foaming device according to claim 1, characterized in that: A connecting groove penetrating along the first direction is formed on the base, and a protrusion that fits the bottom of the connecting groove is provided on the gas switching component. The air gap is formed between the protrusion and the side wall of the connecting groove. The gas switching component rotates to drive the protrusion, so that the distance between the outer peripheral surface of the protrusion and the side wall of the connecting groove changes.

3. The foaming device according to claim 2, characterized in that: The convex block has an elliptical outer peripheral surface or a cam-shaped outer peripheral surface, and a convex portion is provided at the bottom of the communicating groove, and the convex block is attached to the convex portion.

4. The foaming device according to claim 1, characterized in that: The gas supply channel further includes a second section extending along the second direction, the first section and the second section are arranged along an air inflow direction, and the gas switching element rotates relative to the base around an axis perpendicular to the first direction.

5. The foaming device according to claim 4, characterized in that: It also includes a tank body and a cover assembly arranged on top of the tank body, the tank body has a liquid storage cavity for containing liquid, and the tubular body is arranged on the cover assembly; the interior of the cover assembly is provided with a bracket supporting the first section, the exterior of the cover assembly is provided with an operating part connected to the gas switching component, the cover assembly is provided with a through hole corresponding to the installation opening position, and the operating part is connected to the gas switching component through the through hole.

6. The foaming device according to claim 5, characterized in that: The bracket is connected to a fixing piece, and a hook is extended from the fixing piece toward the bracket. The bracket is provided with a corresponding slot, and the hook is inserted into the corresponding slot to connect the fixing piece to the bracket. The operating part is connected to the fixing piece, and the fixing piece limits the gas switching part from being away from the base through the operating part.

7. The foaming device according to claim 1, characterized in that: It also includes an operating part connected to the gas switching part and a liquid switching part, the liquid switching part is connected to the liquid supply channel, the liquid switching part moves relative to the liquid supply channel to change the liquid supply amount from the liquid supply channel to the mixing chamber, and the operating part can be operated to synchronously drive the liquid switching part and the gas switching part.

8. The foaming device according to claim 7, characterized in that The operating part is constructed as a knob, a cam groove is provided on the outer circumference of the knob, and the liquid switching component is provided with a guide column inserted into the cam groove. When the knob drives the gas switching component to rotate, the guide column drives the liquid switching component to move linearly under the guidance of the cam groove.

9. The foaming device according to claim 7, characterized in that: The operating part drives the gas switching component to rotate to change the gas supply amount, and the operating part drives the liquid switching component to move to change the liquid supply amount. The liquid supply amount of the at least one liquid supply channel and the gas supply amount of the gas supply channel are in a preset corresponding relationship.

10. The foaming device according to claim 7, characterized in that: The at least one liquid supply channel is provided with an assembly opening, the liquid switching element extends from the assembly opening into the liquid supply channel, and the assembly opening and the installation opening have the same direction.

11. The foaming device according to claim 7, characterized in that: A through port cooperating with the liquid switching element is provided in the at least one liquid supply channel, and the liquid switching element changes the liquid supply amount of the at least one liquid supply channel by adjusting the fluid passing area of ​​the through port.

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