Foam making device and foam making method for soft and dense foam

Abstract

The invention provides a soft and dense foam making device and method. The soft and dense foam making device comprises a shell, and a containing space is formed in the shell; the driving bubble making gear and the driven bubble making gear are arranged in a meshed mode, the driving bubble making gear and the driven bubble making gear are rotationally arranged in the containing space, and the radial clearance between the tooth crest of the driving bubble making gear and the side wall of the containing space and the radial clearance between the tooth crest of the driven bubble making gear and the side wall of the containing space are larger than the standard working clearance of the gear pump; a suction cavity is formed in the gear disengagement side in the containing space, and a discharge cavity is formed in the gear engagement side in the containing space. The outer wall of the shell is provided with a foam output port communicated with the discharging cavity and an air inlet communicated with the suction cavity, and the outer wall of the shell is further provided with a liquid inlet communicated with the containing space. And the output end of the driving device is connected with the driving foaming gear. The foaming device has the advantages that dense foam can be formed under the condition that a foaming net is not needed, and blockage can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of foam machines, and particularly to a foam generating device and a foam generating method for dense foam.

Background Art

[0002] A gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport liquids. When the gears rotate, the space volume on the side where the gears disengage changes from small to large, creating a vacuum to suck in the liquid; the space volume on the side where the gears mesh changes from large to small, thereby squeezing out the liquid. To ensure that the gear pump can transport liquids normally, it is required that the clearance between the tooth tips of the gears and the side wall of the pump cylinder (i.e., the radial clearance) in the gear pump be within a set standard working clearance (currently, for small gear pumps used to transport liquids such as washing liquids, the general requirement for its standard working clearance is 0.05 - 0.15 mm). At the same time, when the existing gear pump transports liquids, due to the change in the closed volume during the meshing process at the intersection of the gears, it will cause the phenomenon of trapped oil and cause harm.

[0003] The foam machine can mix liquids and gases and pump them into the gas-liquid mixing chamber, enabling the detergent to be directly ejected in the form of foam without the user having to manually rub it repeatedly, which can bring a better user experience. Existing foam machines usually use a foaming net to achieve the output of delicate foam. However, for detergents with paste-like ingredients such as facial cleanser, due to their weak foaming ability, using a foaming net not only easily causes blockage but also has extremely poor foaming effect and cannot form dense foam. Therefore, there is an urgent need to provide a foam generating device that does not require the use of a foaming net and can form dense foam to meet the usage requirements of detergents with paste-like ingredients such as facial cleanser.

Summary of the Invention

[0004] In view of the above technical problems existing in the prior art, the purpose of the present invention is to provide a foam generating device and a foam generating method for dense foam, which can form dense foam without using a foaming net.

[0005] The present invention is implemented as follows:

[0006] In the first aspect, a foam generating device for dense foam includes:

[0007] A housing, within which a receiving space is formed;

[0008] The driving bubble-making gear and the driven bubble-making gear of the meshing setting are rotatably arranged in the accommodation space, and the radial clearance between the tooth tips of the driving bubble-making gear and the driven bubble-making gear and the side wall of the accommodation space is greater than the standard working clearance of the gear pump; an inhalation chamber is formed on the gear disengaging side in the accommodation space, and a discharge chamber is formed on the gear meshing side in the accommodation space; a foam output port communicated with the discharge chamber and an air inlet communicated with the inhalation chamber are arranged on the outer wall of the housing, and a liquid inlet communicated with the accommodation space is further arranged on the outer wall of the housing;

[0009] A driving device, the output end of the driving device is connected with the driving bubble-making gear.

[0010] Further, the radial clearance between the tooth tips of the driving bubble-making gear and the driven bubble-making gear and the side wall of the accommodation space is greater than 0.15 mm and less than or equal to 1.50 mm.

[0011] Further, a first axial clearance is left between the upper end surfaces of the driving bubble-making gear and the driven bubble-making gear and the top wall of the accommodation space, and a second axial clearance is left between the lower end surfaces of the driving bubble-making gear and the driven bubble-making gear and the bottom wall of the accommodation space; both the first axial clearance and the second axial clearance are less than 0.5 mm.

[0012] Further, the foam output port is arranged on the side wall of the housing, and the foam output port is communicated with the bottom of the discharge chamber.

[0013] Further, an active liquid supply device communicated with the input end of the liquid inlet is further included.

[0014] Further, the active liquid supply device includes a leather cup pump and a stirring assembly. A detergent input port and a water inlet are arranged on the outer wall of the leather cup pump. A liquid passing and mixing chamber is formed at the outlet of the leather cup pump, and the liquid passing and mixing chamber is communicated with the liquid inlet; the stirring assembly is arranged in the liquid passing and mixing chamber and between the outlet of the leather cup pump and the liquid inlet, and both the stirring assembly and the leather cup pump use the driving device as the power source.

[0015] Further, the detergent input port is arranged at the top of the leather cup pump.

[0016] Further, the foam particle size of the dense foam is 0.03 - 0.3 mm.

[0017] In a second aspect, a method for making dense foam, the method for making foam includes the following steps:

[0018] Liquid and air input: Inject the mixed liquid of detergent and water into the accommodation space of the housing through the liquid inlet, and send air into the accommodation space through the air inlet communicated with the accommodation space in the initial state;

[0019] Foaming: The driving device drives the active foaming gear and the driven foaming gear to rotate. By utilizing the change in the closed volume generated during the meshing process at the intersection of the active foaming gear and the driven foaming gear, air and the liquid mixture are continuously squeezed to form large particle bubbles. Among them, the radial clearance between the tooth tips of the active foaming gear and the driven foaming gear and the side wall of the accommodating space is greater than the standard working clearance of the gear pump.

[0020] Bubble breaking: With the continuous meshing rotation of the active foaming gear and the driven foaming gear, the active foaming gear and the driven foaming gear continuously stir the large particle bubbles to break them into smaller bubbles, thereby gradually forming a dense foam.

[0021] Foam output: When the dense foam fills the radial clearance between the tooth tips of the active foaming gear and the driven foaming gear and the side wall of the accommodating space, and hinders the internal leakage between the discharge chamber and the suction chamber to establish the working pressure, the dense foam is output through the foam outlet.

[0022] Air intake: When the dense foam is discharged, air is inhaled into the suction chamber through the air inlet by the negative pressure generated during the operation of the active foaming gear and the driven foaming gear.

[0023] Furthermore, the specific operation of injecting the liquid mixture of detergent and water into the accommodating space of the housing through the liquid inlet is as follows: According to the required mixing ratio, the active liquid supply device sucks the detergent and water into the liquid mixing chamber, and in the liquid mixing chamber, the stirring assembly is used to continuously stir and mix the detergent and water to form a liquid mixture, and the liquid mixture is actively injected into the accommodating space of the housing through the liquid inlet.

[0024] The foaming method further includes: controlling the size of the foam particles by adjusting the clearance between the active foaming gear and the driven foaming gear and the inner wall of the accommodating space.

[0025] By adopting the technical solution of the present invention, there are at least the following beneficial effects:

[0026] 1. Gears are directly used for foaming without the need to use a foaming net. Since gears have strong resistance to harsh environments, compared with using a foaming net, it can better adapt to the foaming of facial cleansers and other detergents containing paste-like substances or impurities, and can avoid blockage.

[0027] 2. By continuously rotating and squeezing the gears to generate foam, compared with a foaming net, finer foam can be generated, especially for facial cleansers and other detergents that are not easy to foam, denser foam can be better produced.

[0028] 3. By setting an active liquid supply device at the input end of the liquid inlet, the active liquid supply device is designed to include a leather cup pump, and a liquid passing and mixing chamber is formed at the outlet of the leather cup pump, and a stirring assembly is arranged in the liquid passing and mixing chamber. When working specifically, on the one hand, the leather cup pump can be used to actively transport the mixed liquid to the accommodation space to meet the liquid supply requirements; on the other hand, the real-time preparation of the mixed liquid can be realized to ensure the use effect.

Description of the Drawings

[0029] The present invention will be further described below with reference to the drawings in conjunction with embodiments.

[0030] Figure 1 is one of the three-dimensional structure diagrams of a foaming device for dense foam of the present invention;

[0031] Figure 2 is the second of the three-dimensional structure diagrams of a foaming device for dense foam of the present invention;

[0032] Figure 3 is the cross-sectional view of a foaming device for dense foam of the present invention;

[0033] Figure 4 is the structure diagram of a check valve arranged in the input area of the liquid passing and mixing chamber of the leather cup pump of the present invention;

[0034] Figure 5 is the structure diagram of the liquid passing and mixing chamber and the stirring assembly in the leather cup pump of the present invention;

[0035] Figure 6 is the assembly diagram of the active foaming gear and the driven foaming gear in the accommodation space of the present invention;

[0036] Figure 7 is the schematic diagram of the principle of foam formation by the foaming device of the present invention;

[0037] Figure 8 is the physical diagram of the foaming device of the present invention at the initial stage of bubbles;

[0038] Figure 9 is a physical diagram of the foaming device of the present invention during the bubble breaking process;

[0039] Figure 10 is the physical diagram of the foaming device of the present invention when the foam is output;

[0040] Figure 11 is the physical diagram of the foaming device of the present invention when the radial clearance is 0.05 mm;

[0041] Figure 12 is the physical diagram of the foam output by the foaming device of the present invention when the radial clearance is 0.05 mm;

[0042] Figure 13It is a physical diagram of the foaming device of the present invention when a radial clearance of 0.15 mm is adopted;

[0043] Figure 14 It is a physical diagram of the foam output by the foaming device of the present invention when a radial clearance of 0.15 mm is adopted;

[0044] Figure 15 It is a physical diagram of the foaming device of the present invention when a radial clearance of 0.30 mm is adopted;

[0045] Figure 16 It is a physical diagram of the foam output by the foaming device of the present invention when a radial clearance of 0.30 mm is adopted;

[0046] Figure 17 It is a physical diagram of the foaming device of the present invention when a radial clearance of 0.50 mm is adopted;

[0047] Figure 18 It is a physical diagram of the foam output by the foaming device of the present invention when a radial clearance of 0.50 mm is adopted;

[0048] Figure 19 It is a physical diagram of the foaming device of the present invention when a radial clearance of 1.00 mm is adopted;

[0049] Figure 20 It is a physical diagram of the foam output by the foaming device of the present invention when a radial clearance of 1.00 mm is adopted;

[0050] Figure 21 It is a physical diagram of the foaming device of the present invention when a radial clearance of 1.50 mm is adopted;

[0051] Figure 22 It is a physical diagram of the foam output by the foaming device of the present invention when a radial clearance of 1.50 mm is adopted.

[0052] Explanation of reference numerals:

[0053] Foaming device 100;

[0054] Housing 1, accommodating space 11, suction chamber 111, discharge chamber 112, foam outlet 12, air inlet 13, liquid inlet 14, radial clearance 151, first axial clearance 152, second axial clearance 153;

[0055] Active foaming gear 2;

[0056] Driven foaming gear 3;

[0057] Driving device 4, connecting shaft 41, gear set 42;

[0058] The active liquid supply device 5, the leather cup pump 51, the liquid passing and mixing chamber 511, the input area 5111, the mixing area 5112, the output area 5113, the stirring assembly 52, the detergent delivery channel 53, the water inlet channel 54, the one-way valve 55, the detergent input port 561, the water inlet 562;

[0059] The closed volume 6.

Detailed implementation manners

[0060] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with the specification drawings and specific implementation manners.

[0061] It should be noted here that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing these implementation manners and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0062] Embodiment 1

[0063] Please refer to Figures 1 to 22 As shown, a foaming device 100 for dense foam of the present invention, the foaming device 100 includes:

[0064] The housing 1, an accommodation space 11 is formed inside the housing 1, and the accommodation space 11 is used to receive gears, liquids, gases, etc.;

[0065] The driving foaming gear 2 and the driven foaming gear 3 with meshing setting are rotatably arranged in the accommodating space 11, and the radial clearance 151 between the tooth tips of the driving foaming gear 2 and the driven foaming gear 3 and the side wall of the accommodating space 11 is larger than the standard working clearance of the gear pump; an inhalation chamber 111 is formed on the gear disengaging side in the accommodating space 11, and a discharge chamber 112 is formed on the gear meshing side in the accommodating space 11; a foam outlet 12 communicating with the discharge chamber 112 and an air inlet 13 communicating with the inhalation chamber 111 are provided on the outer wall of the housing 1, and a liquid inlet 14 communicating with the accommodating space 11 is further provided on the outer wall of the housing 1; wherein, the foam outlet 12 is used for outputting the dense foam to the outside when the output condition is reached, the air inlet 13 is used for inputting the external air into the accommodating space 11, and the liquid inlet 14 is used for inputting the mixed liquid (i.e., the mixed liquid of detergent and water) into the accommodating space 11; due to the design of the present invention, the radial clearance 151 between the tooth tips of the driving foaming gear 2 and the driven foaming gear 3 and the side wall of the accommodating space 11 is larger than the standard working clearance of the gear pump, so that the mixed liquid injected into the accommodating space 11 through the liquid inlet 14 cannot be output in real time. Therefore, it is only necessary to connect the liquid inlet 14 with the accommodating space 11, and the specific connecting position can be flexibly designed according to actual use requirements, and is not limited to a specific position;

[0066] A driving device 4, the output end of the driving device 4 is connected with the driving foaming gear 2, so that the driving device 4 can drive the meshing driving foaming gear 2 and the driven foaming gear 3 to rotate to produce foam; wherein, the housing 1, the driving foaming gear 2, the driven foaming gear 3 and the driving device 4 just form a gear pump.

[0067] It should be noted that: the standard working clearance of the above-mentioned gear pump specifically refers to the radial clearance between the tooth tip of the gear and the side wall of the pump cylinder when a gear pump of the same size as the present invention can drive a liquid (such as clear water) for normal real-time transportation; that is, when the radial clearance 151 between the tooth tips of the driving foaming gear 2 and the driven foaming gear 3 and the side wall of the accommodating space 11 is within the range of the standard working clearance, the foaming device 100 of the present invention is a gear pump that can normally transport liquid in real time; and when the above technical solution of the present invention is adopted, that is, the radial clearance 151 between the tooth tips of the driving foaming gear 2 and the driven foaming gear 3 and the side wall of the accommodating space 11 is larger than the standard working clearance of the gear pump, at this time the foaming device 100 is equivalent to a gear pump with serious internal leakage and failure, which cannot establish a working pressure, so that the liquid injected into the accommodating space 11 cannot be output in real time, but will stay in the accommodating space 11 until the working pressure is established inside the foaming device 100 before it will be output.

[0068] The working principle of the foam generating device 100 of the present invention to generate foam is as follows: By ingeniously utilizing the phenomenon of trapped oil existing in the existing gear pump during operation (i.e., the change of the closed volume 6 occurs at the intersection of the gears during the meshing process), it is designed that the radial clearance 151 between the tooth tops of the driving foam generating gear 2 and the driven foam generating gear 3 and the side wall of the accommodation space 11 is larger than the standard working clearance of the gear pump, and a foam outlet 12 communicating with the discharge chamber 112, an air inlet 13 communicating with the suction chamber 111, and a liquid inlet 14 communicating with the accommodation space 11 are respectively arranged on the outer wall of the housing 1; thus, at the beginning of operation, the foam generating device 100 is equivalent to a gear pump with serious internal leakage and failure, which cannot establish working pressure, so that the mixed liquid (i.e., the mixed liquid of detergent such as facial cleanser and water) injected through the liquid inlet 14 will stay in the accommodation space 11, and in the initial state, external air will enter the suction chamber 111 through the air inlet 13 and be mixed with the mixed liquid; please refer to Figure 7 As shown, during operation, the change of the closed volume 6 occurs at the intersection of the driving foam generating gear 2 and the driven foam generating gear 3 during the meshing process, that is, during the meshing rotation of the driving foam generating gear 2 and the driven foam generating gear 3, the closed volume 6 formed at the intersection will be first compressed and reduced and then increased from the gear meshing side to the gear disengaging side. Under the action of the driving foam generating gear 2 and the driven foam generating gear 3, the mixed liquid and air will be continuously squeezed to form large particle bubbles; then, with the continuous meshing rotation of the driving foam generating gear 2 and the driven foam generating gear 3, the driving foam generating gear 2 and the driven foam generating gear 3 will continuously stir the large particle bubbles to break them into smaller bubbles, thereby gradually forming a dense foam; because the foam has a certain viscosity to prevent the internal leakage of the gear pump, and the denser the foam, the greater its viscosity, so when the dense foam fills the radial clearance 151 between the tooth tops of the driving foam generating gear 2 and the driven foam generating gear 3 and the side wall of the accommodation space 11 and hinders the internal leakage between the discharge chamber 112 and the suction chamber 111 to establish working pressure, the foam outlet 12 will output the dense foam; at the same time, when the dense foam is discharged, a negative pressure will be generated inside the foam generating device 100 to suck air into the suction chamber 111 through the air inlet 13.

[0069] By adopting the above technical solutions of the present invention, there are at least the following beneficial effects:

[0070] 1. Foaming is directly carried out by gears without using a foaming net. Since the gears have strong resistance to harsh environments, compared with using a foaming net, it can better adapt to the foaming of detergents such as facial cleanser containing paste or impurities, and can avoid blockage.

[0071] 2. By continuously rotating and squeezing the gears to generate foam, compared with a foaming net, finer foam can be generated, especially for detergents such as facial cleanser that are not easy to foam, and denser foam can be better produced.

[0072] In the invention, the radial clearance 151 between the tooth tips of the active foaming gear 2 and the driven foaming gear 3 and the side wall of the accommodation space 11 is greater than 0.15 mm and less than or equal to 1.50 mm, so as to ensure that the foaming device 100 can generate denser foam, thereby better meeting the actual use requirements. When the present invention is specifically implemented, for the specific radial clearance 151 between the tooth tips of the active foaming gear 2 and the driven foaming gear 3 and the side wall of the accommodation space 11, it can be selected and set within the range of greater than 0.15 mm and less than or equal to 1.50 mm according to actual needs, and the smaller the clearance, the coarser the foam. At the same time, although the foam has a certain viscosity to prevent internal leakage of the gear pump, if the radial clearance 151 between the tooth tips of the active foaming gear 2 and the driven foaming gear 3 and the side wall of the accommodation space 11 is too large, it is difficult to effectively prevent internal leakage of the gear pump by relying on the foam. Therefore, in order to ensure that the working pressure can be established to output the foam, the present invention is designed such that the radial clearance 151 between the tooth tips of the active foaming gear 2 and the driven foaming gear 3 and the side wall of the accommodation space 11 is less than or equal to 1.50 mm.

[0073] In the invention, please refer to Figure 3 As shown, a first axial clearance 152 is left between the upper end faces of the active foaming gear 2 and the driven foaming gear 3 and the top wall of the accommodation space 11, and a second axial clearance 153 is left between the lower end faces of the active foaming gear 2 and the driven foaming gear 3 and the bottom wall of the accommodation space 11; both the first axial clearance 152 and the second axial clearance 153 are less than 0.5 mm.

[0074] When the foaming device 100 is specifically working, the active foaming gear 2 and the driven foaming gear 3 will continuously rotate under the drive of the drive device 4. If there is no clearance between the upper end faces of the active foaming gear 2 and the driven foaming gear 3 and the top wall of the accommodation space 11 and between the lower end faces and the bottom wall of the accommodation space 11, it will have an adverse effect on the rotation of the active foaming gear 2 and the driven foaming gear 3, and even lead to wear. Therefore, the present invention is designed such that a first axial clearance 152 is left between the upper end faces of the active foaming gear 2 and the driven foaming gear 3 and the top wall of the accommodation space 11, and a second axial clearance 153 is left between the lower end faces of the active foaming gear 2 and the driven foaming gear 3 and the bottom wall of the accommodation space 11; at the same time, if the clearances between the upper end faces of the active foaming gear 2 and the driven foaming gear 3 and the top wall of the accommodation space 11 and between the lower end faces and the bottom wall of the accommodation space 11 are too large, it will also cause the foam to be difficult to effectively prevent internal leakage of the gear pump. Therefore, the present invention is designed such that both the first axial clearance 152 and the second axial clearance 153 are less than 0.5 mm.

[0075] In the present invention, the foam outlet 12 is provided on the side wall of the housing 1, and the foam outlet 12 communicates with the bottom of the discharge chamber 112 to ensure that the generated dense foam can be better output through the foam outlet 12 when establishing the working pressure. At the same time, in the specific implementation of the present invention, the caliber of the foam outlet 12 can be designed according to the actual output requirements of the foam.

[0076] In some embodiments of the present invention, the foaming device 100 further includes a main liquid supply device 5 communicating with the input end of the liquid inlet 14. Since the radial clearance 151 between the tips of the main foaming gear 2 and the driven foaming gear 3 and the side wall of the accommodation space 11 in the present invention is greater than the standard working clearance of the gear pump, the suction requirement for the mixed liquid cannot be met during specific operation. Therefore, the main liquid supply device 5 is provided at the input end of the liquid inlet 14 so that the mixed liquid can be actively injected into the accommodation space 11 by using the main liquid supply device 5 during operation.

[0077] As a specific implementation manner of the present invention, please refer to Figures 4 - 6 As shown, the main liquid supply device 5 includes a leather cup pump 51 and a stirring assembly 52. The outer wall of the leather cup pump 51 is provided with a detergent input port 561 and a water inlet 562. Among them, the detergent input port 561 is used to input detergent (such as facial cleanser, etc.), and the water inlet 562 is used to input clear water to dilute the detergent.

[0078] A liquid passing and mixing chamber 511 is formed at the outlet of the leather cup pump 51. The liquid passing and mixing chamber 511 is used for the passage of liquid (including detergent and clear water) and the mixing and dilution of the passed liquid. The liquid passing and mixing chamber 511 communicates with the liquid inlet 14 to inject the mixed mixed liquid into the accommodation space 11 through the liquid inlet 14. The stirring assembly 52 is arranged in the liquid passing and mixing chamber 511 and is located between the outlet of the leather cup pump 51 and the liquid inlet 14. When the leather cup pump 51 of the present invention is operating, it can suck detergent (such as facial cleanser) into the liquid passing and mixing chamber 511 through the detergent input port 561, and at the same time suck clear water into the liquid passing and mixing chamber 511 through the water inlet 562, and use the stirring assembly 52 to stir, mix and dilute the detergent and clear water in the liquid passing and mixing chamber 511 to obtain a mixed liquid. It should be noted that the leather cup pump 51 is a commonly used liquid pumping pump in the art and belongs to the prior art, so the specific structure of the leather cup pump 51 will not be introduced in detail here.

[0079] In the present invention, both the stirring assembly 52 and the diaphragm pump 51 use the driving device 4 as the power source. When the present invention is specifically implemented, the driving device 4 is a driving motor. The active foaming gear 2, the stirring assembly 52, and the diaphragm pump 51 can all be connected to the driving motor by a connecting shaft 41 and a gear set 42, so as to use one driving motor to drive the active foaming gear 2, the stirring assembly 52, and the diaphragm pump 51 to work simultaneously. At the same time, in the present invention, the diaphragm pump 51 and the gear pump can share a housing 1. By adopting the above structural design, on the one hand, the overall cost of the entire foaming device 100 can be effectively reduced, and on the other hand, the overall structure of the entire foaming device 100 can be made more compact, small and beautiful. Of course, the above is only a preferred embodiment of the present invention, but the present invention is not limited thereto. When specifically implemented, an independent driving device 4 can also be used for the active foaming gear 2, the stirring assembly 52, or the diaphragm pump 51 according to actual needs, or corresponding housings can be provided for the diaphragm pump 51 and the gear pump respectively.

[0080] In the present invention, by providing an active liquid supply device 5 at the input end of the liquid inlet 14, the active liquid supply device 5 is designed to include a diaphragm pump 51, and a liquid passing and mixing chamber 511 is formed at the outlet of the diaphragm pump 51, and a stirring assembly 52 is arranged in the liquid passing and mixing chamber 511. So that during specific operation, on the one hand, the diaphragm pump 51 can actively transport the mixed liquid to the accommodation space 11 to meet the liquid supply requirements; on the other hand, the real-time preparation of the mixed liquid can be realized to ensure the use effect.

[0081] Furthermore, the liquid passing and mixing chamber 511 includes an input area 5111, a mixing area 5112, and an output area 5113 that are connected in sequence. The stirring assembly 52 is located in the mixing area 5112, the outlet of the diaphragm pump 51 is located in the input area 5111, and the liquid inlet 14 is located in the output area 5113; more specifically, the input area 5111 is respectively connected to the detergent input port 561 through a detergent delivery channel 53 and to the water inlet 562 through a water inlet channel 54. The outlets of the detergent delivery channel 53 and the water inlet channel 54 are the outlets of the diaphragm pump 51. By adopting the above structural design, it can be ensured that the stirring assembly 52 can better stir and mix the detergent and clean water to obtain the mixed liquid.

[0082] Furthermore, one-way valves 55 are provided at the position corresponding to the outlet of the diaphragm pump 51 in the input area 5111 and at the position corresponding to the liquid inlet 14 in the accommodation space 11 to prevent the backflow of the mixed liquid during the working process. Among them, the one-way valve at the position corresponding to the liquid inlet 14 in the accommodation space 11 is not shown in the drawings.

[0083] The detergent input port 561 is provided at the top of the leather cup pump 51. Since detergents such as facial cleanser have high viscosity and are not easy to extract, by setting the detergent input port 561 at the top of the leather cup pump 51, the detergent can be gathered at the bottom of the container under the action of gravity, so as to better extract the detergent.

[0084] In the present invention, the foam particle size of the dense foam is 0.03 - 0.3 mm. When the present invention is specifically implemented, the specific radial clearance 151 between the tooth tips of the active foam - making gear 2 and the driven foam - making gear 3 and the side wall of the accommodation space 11 can be adjusted to obtain the dense foam with the required particle size.

[0085] Embodiment 2

[0086] Please refer to Figures 1 to 22 As shown, a foam - making method for dense foam of the present invention. The foam - making method of the present invention uses the above - mentioned foam - making device 100. For the specific structure of the foam - making device 100 and the specific technical effects that can be obtained, please refer to the detailed introduction in Embodiment 1 and will not be elaborated here; the foam - making method includes the following steps:

[0087] Liquid and air input: Inject the mixed liquid of detergent and water into the accommodation space 11 of the housing 1 through the liquid inlet 14, and input air into the accommodation space 11 through the air inlet 13 connected to the accommodation space 11 in the initial state; because in the initial state, the foam - making device 100 is equivalent to a gear pump with serious internal leakage and failure, and it cannot establish working pressure, so it is impossible to actively suck external air into the accommodation space 11; however, because the accommodation space 11 is connected to the external atmosphere through the air inlet 13, external air can automatically enter the accommodation space 11 through the air inlet 13 before or at the beginning of injecting the mixed liquid;

[0088] Foaming: Drive the active foam - making gear 2 and the driven foam - making gear 3 to rotate through the driving device 4, and utilize the change of the closed volume 6 generated during the meshing process at the intersection of the active foam - making gear 2 and the driven foam - making gear 3 to continuously squeeze air and the mixed liquid to form large - particle bubbles; among them, the radial clearance 151 between the tooth tips of the active foam - making gear 2 and the driven foam - making gear 3 and the side wall of the accommodation space 11 is larger than the standard working clearance of the gear pump, so as to ensure that the mixed liquid injected into the accommodation space 11 cannot be output in real time, but will stay in the accommodation space 11 and be mixed with external air under the action of the active foam - making gear 2 and the driven foam - making gear 3 to achieve foaming; as Figure 8As shown; the large particle bubbles generated will gradually fill the radial clearance 151 between the tops of the teeth of the active foam-making gear 2 and the driven foam-making gear 3 and the side wall of the accommodation space 11. At the same time, since the large particle bubbles cannot fill the radial clearance 151, the working pressure cannot be established, and the bubbles have a certain viscosity, so that the large particle bubbles cannot be output through the foam outlet 12 either;

[0089] Bubble breaking: With the continuous meshing rotation of the active foam-making gear 2 and the driven foam-making gear 3, the active foam-making gear 2 and the driven foam-making gear 3 continuously stir the large particle bubbles to break them into smaller bubbles, thus gradually forming a dense foam, as Figure 9 shown; in the process of the specific operation of the present invention, the continuously broken smaller bubbles will continue to fill the radial clearance 151 between the tops of the teeth of the active foam-making gear 2 and the driven foam-making gear 3 and the side wall of the accommodation space 11, and because the bubbles have a certain viscosity, they still cannot be output before the working pressure is established;

[0090] Foam output: When the dense foam fills the radial clearance 151 between the tops of the teeth of the active foam-making gear 2 and the driven foam-making gear 3 and hinders the internal leakage between the discharge chamber 112 and the suction chamber 111 to establish the working pressure, the dense foam is output through the foam outlet 12, as Figure 10 shown;

[0091] Air intake: When the dense foam is discharged, the air is sucked into the suction chamber 111 through the intake port 13 by the negative pressure generated when the active foam-making gear 2 and the driven foam-making gear 3 work, for subsequent foam making.

[0092] In the present invention, the injection of the mixed liquid of detergent and water into the accommodation space 11 of the housing 1 through the liquid inlet 14 is specifically as follows: according to the required mixing ratio, the active liquid supply device 5 sucks the detergent and water into the liquid passing and mixing chamber 511, and in the liquid passing and mixing chamber 511, the stirring assembly 52 is used to stir and mix the detergent and water in real time to form a mixed liquid, that is, the real-time preparation of the mixed liquid is realized, and the mixed liquid is actively injected into the accommodation space 11 of the housing 1 through the liquid inlet 14.

[0093] In the present invention, the foam-making method further includes: controlling the size of the foam particles by adjusting the radial clearance 151 between the tops of the teeth of the active foam-making gear 2 and the driven foam-making gear 3 and the side wall of the accommodation space 11, that is, in the specific implementation of the present invention, the radial clearance 151 between the tops of the teeth of the active foam-making gear 2 and the driven foam-making gear 3 and the side wall of the accommodation space 11 can be designed according to the actual required size of the foam particles.

[0094] The technical solution of the present invention will be further described in detail below in conjunction with the settings of some gaps and the actual output foam effect diagrams. It should be noted that since the axial gaps between the upper end faces of the active foaming gear 2 and the driven foaming gear 3 and the top wall of the accommodation space 11 and between the lower end faces and the bottom wall of the accommodation space 11 have little effect on the foam effect and only need to be less than 0.5 mm, in the following tests, the radial gap 151 between the tooth tips of the active foaming gear 2 and the driven foaming gear 3 and the side wall of the accommodation space 11 is used:

[0095] As Figures 11 - 22 shown, where Figure 11 and Figure 12 are the physical diagram of the device and the physical diagram of the output foam when the radial gap 151 is set to 0.05 mm; Figure 13 and Figure 14 are the physical diagram of the device and the physical diagram of the output foam when the radial gap 151 is set to 0.15 mm; Figure 15 and Figure 16 are the physical diagram of the device and the physical diagram of the output foam when the radial gap 151 is set to 0.30 mm; Figure 17 and Figure 18 are the physical diagram of the device and the physical diagram of the output foam when the radial gap 151 is set to 0.50 mm; Figure 19 and Figure 20 are the physical diagram of the device and the physical diagram of the output foam when the radial gap 151 is set to 1.00 mm; Figure 21 and Figure 22 are the physical diagram of the device and the physical diagram of the output foam when the radial gap 151 is set to 1.50 mm. Through Figure 12 , Figure 14 , Figure 16 , Figure 18 , Figure 20 and Figure 22 it can be clearly seen that: the smaller the radial gap 151, the coarser the finally output foam; while the larger the radial gap 151, the denser and finer the finally output foam. When the radial gap 151 set by the present invention is greater than 0.15 mm and less than or equal to 1.50 mm, it can well form a dense foam with a particle size of 0.03 - 0.3 mm, thus better meeting the actual use requirements.

[0096] Although the specific embodiments of the present invention have been described above, those skilled in the art of this technology should understand that the specific embodiments we described are illustrative rather than used to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope protected by the claims of the present invention.

Claims

1. A foaming device for a dense foam, characterized in that, Comprising: A housing, within which an accommodation space is formed; An actively foaming gear and a driven foaming gear which are meshed, the actively foaming gear and the driven foaming gear are rotatably arranged within the accommodation space, and the radial clearance between the tooth tips of the actively foaming gear and the driven foaming gear and the side wall of the accommodation space is greater than the standard working clearance of the gear pump; an inhalation chamber is formed on the gear disengagement side within the accommodation space, and a discharge chamber is formed on the gear meshing side within the accommodation space; a foam output port communicating with the discharge chamber and an air inlet communicating with the inhalation chamber are provided on the outer wall of the housing, and a liquid inlet communicating with the accommodation space is further provided on the outer wall of the housing; A driving device, the output end of which is connected to the actively foaming gear.

2. The foaming device for dense foam according to claim 1, characterized in that: The radial clearance between the tooth tips of the actively foaming gear and the driven foaming gear and the side wall of the accommodation space is greater than 0.15 mm and less than or equal to 1.50 mm.

3. The foaming device for dense foam according to claim 1, characterized in that: A first axial clearance is left between the upper end surfaces of the actively foaming gear and the driven foaming gear and the top wall of the accommodation space, and a second axial clearance is left between the lower end surfaces of the actively foaming gear and the driven foaming gear and the bottom wall of the accommodation space; both the first axial clearance and the second axial clearance are less than 0.5 mm.

4. The foaming device for a dense foam according to claim 1, wherein: The foam output port is provided on the side wall of the housing and communicates with the bottom of the discharge chamber.

5. A foaming device for a dense foam according to any one of claims 1-4, characterized in that: It further includes an actively supplying liquid device connected to the input end of the liquid inlet.

6. The foaming device for dense foam according to claim 5, characterized in that: The actively supplying liquid device includes a leather cup pump and a stirring assembly. A detergent input port and a water inlet are provided on the outer wall of the leather cup pump, a liquid passing and mixing chamber is formed at the outlet of the leather cup pump, and the liquid passing and mixing chamber communicates with the liquid inlet; the stirring assembly is arranged within the liquid passing and mixing chamber and between the outlet of the leather cup pump and the liquid inlet, and both the stirring assembly and the leather cup pump use the driving device as the power source.

7. The foaming device for a dense foam according to claim 6, wherein: The detergent input port is provided on the top of the leather cup pump.

8. The foaming device for a dense foam according to claim 1, characterized in that: The foam particle size of the dense foam is 0.03 - 0.3 mm.

9. A method for producing a dense foam, characterized in that, The foaming method includes the following steps: Liquid and air input: Inject a mixed liquid of detergent and water into the accommodation space of the housing through the liquid inlet, and send air into the accommodation space through the air inlet communicating with the accommodation space in the initial state; Foaming: Drive the actively foaming gear and the driven foaming gear to rotate through the driving device, and utilize the change in the closed volume generated during the meshing process at the intersection of the actively foaming gear and the driven foaming gear to continuously squeeze air and the mixed liquid to form large particle bubbles; wherein, the radial clearance between the tooth tips of the actively foaming gear and the driven foaming gear and the side wall of the accommodation space is greater than the standard working clearance of the gear pump; Bubble breaking: As the actively foaming gear and the driven foaming gear continue to mesh and rotate, the actively foaming gear and the driven foaming gear continuously stir the large particle bubbles to break them into smaller bubbles, thereby gradually forming dense foam; Foam output: When the dense foam fills the radial clearance between the tooth tips of the actively foaming gear and the driven foaming gear and the side wall of the accommodation space and hinders the internal leakage between the discharge chamber and the inhalation chamber to establish a working pressure, output the dense foam through the foam output port; Inhalation: After the dense foam is discharged, negative pressure generated when the active foam-making gear and the driven foam-making gear work sucks air into the inhalation chamber through the air inlet.

10. A method for producing a dense foam according to claim 9, characterized in that, The specific process of injecting the mixed liquid of detergent and water into the accommodation space of the housing through the liquid inlet is as follows: According to the required mixing ratio, the active liquid supply device sucks the detergent and water into the liquid passing and mixing chamber, and in the liquid passing and mixing chamber, the stirring assembly is used to stir and mix the detergent and water in real time to form a mixed liquid, and the mixed liquid is actively injected into the accommodation space of the housing through the liquid inlet; The foam-making method further includes: controlling the size of the foam particles by adjusting the radial clearance between the tooth tips of the active foam-making gear and the driven foam-making gear and the side wall of the accommodation space.

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