A nozzle suitable for high-viscosity solutions and its application in the extrusion of laundry detergent

Abstract

The present invention relates to the field of nozzles. To solve the problem that the foaming effect of existing nozzles decreases when applied to high-viscosity solutions, a nozzle suitable for high-viscosity solutions and its application in the extrusion of laundry detergent are provided, including: a connection cover, a pressing head, a liquid storage component, and a partition. The connection cover is provided with a through hole; the pressing head is sleeved in the through hole; the pressing head is provided with a liquid outlet hole and an air hole, one end of the air hole is communicated with the liquid outlet hole, and the other end of the air hole is communicated with the inner cavity of the connection cover; one end of the liquid storage component is connected to the pressing head, the other end of the liquid storage component is connected to the connection cover, and the liquid outlet end of the liquid storage component is communicated with the liquid outlet hole; there is an air storage space left between the outer wall of the liquid storage component and the inner wall of the connection cover; a partition is provided on the outer wall of the liquid storage component, and the partition divides the air storage space into an upper cavity and a lower cavity. When the pressing head is pressed down in the present invention to extrude the solution in the liquid storage component, the mixing between the gas flowing out of the air hole and the solution flowing out of the liquid storage component is promoted.

Description

Technical Field

[0001] The present invention relates to the field of nozzles, and more particularly, to a nozzle suitable for high-viscosity solutions and its application in the extrusion of laundry detergent. Background Art

[0002] For liquids that need to form bubbles when ejected, nozzles with special structures are usually required to mix the liquid with air during the ejection process. In order to promote the formation of bubbles and increase the fineness and stability of the bubbles, a mesh structure or the like can also be added to the gas-liquid mixing space.

[0003] For laundry detergent, its viscosity will increase significantly at low temperatures. The increase in viscosity not only affects the flow of the laundry detergent but also affects its mixing process with air. Some laundry detergents may even produce solid particles at low temperatures, resulting in a relatively reduced foaming effect of the laundry detergent in winter, an increase in the extrusion force, and even possible blockage of the nozzle. Summary of the Invention

[0004] The purpose of the present invention is to provide a nozzle suitable for high-viscosity solutions to solve the problem of the decreased foaming effect of existing nozzles when applied to high-viscosity solutions.

[0005] Another purpose of the present invention is to provide an application of a nozzle in the extrusion of laundry detergent to solve the problem of the reduced foaming effect of the nozzle after the viscosity of the laundry detergent increases significantly at low temperatures.

[0006] The embodiments of the present invention are achieved by the following technical solutions:

[0007] A nozzle suitable for high-viscosity solutions includes: a connection cap, a pressing head, a liquid storage component, and a partition. The connection cap is provided with a through hole; the pressing head is sleeved in the through hole and has a degree of freedom of movement along the axial direction of the through hole; the pressing head is provided with a liquid outlet hole and an air hole, one end of the air hole is communicated with the liquid outlet hole, and the other end of the air hole is communicated with the inner cavity of the connection cap; one end of the liquid storage component is connected to the pressing head, the other end of the liquid storage component is connected to the connection cap, the liquid outlet end of the liquid storage component is communicated with the liquid outlet hole, and the liquid inlet end of the liquid storage component is communicated with the pipe body configured by the connection cap; there is an air storage space between the outer wall of the liquid storage component and the inner wall of the connection cap; a partition is provided on the outer wall of the liquid storage component, and the partition divides the air storage space into an upper cavity and a lower cavity; when the pressing head is pressed down, the nozzle ejects liquid and the partition moves towards the direction close to the pressing head.

[0008] Preferably, the pressing head is provided with a mounting hole which communicates with the air hole. One end of the connecting cover away from the pressing head is provided with a lower connecting cylinder. The liquid storage assembly includes: an upper connecting cylinder, a plunger, a closed cylinder, a moving cylinder and an elastic member. One end of the upper connecting cylinder is installed in the mounting hole, and the other end of the upper connecting cylinder extends into the connecting cover; one end of the plunger is hung on the top opening of the upper connecting cylinder; the outer wall of the closed cylinder is connected to the inner wall of the lower connecting cylinder, and the other end of the plunger passes through the closed cylinder, and the other end of the plunger is used to block the top opening of the closed cylinder; one end of the moving cylinder is connected to the upper connecting cylinder through a driving assembly, and the other end of the moving cylinder is slidably connected to the lower connecting cylinder. The outer wall of the moving cylinder is connected to the partition plate, and the moving direction of the moving cylinder is opposite to that of the upper connecting cylinder; the elastic member is sleeved on the lower connecting cylinder, one end of the elastic member is connected or abutted to the bottom end of the moving cylinder, and the other end of the elastic member is connected or abutted to the inner wall of the connecting cover.

[0009] Preferably, the driving assembly includes: a first tooth component, a second tooth component and a gear. The first tooth component is provided on the outer wall of the upper connecting cylinder; the second tooth component is provided on the inner wall of the moving cylinder; the gear is installed at the end of the lower connecting cylinder, and the first tooth component and the second tooth component are respectively arranged on both sides of the gear and are in transmission connection with the gear.

[0010] Preferably, the side wall of the upper connecting cylinder is provided with a first elastic part, and the first elastic part is located above the lower connecting cylinder; when the partition plate moves towards the pressing head, V1≥7.5V2; where V1 represents the reduction amount of the volume of the upper cavity caused by the movement of the partition plate, and V2 represents the increase amount of the volume of the upper cavity caused by the deformation of the first elastic part.

[0011] Preferably, the bottom end of the connecting cover is provided with a second elastic part.

[0012] Preferably, the air hole includes: an air outlet section, an air return section and a one-way valve. One end of the air outlet section communicates with the inner cavity of the connecting cover, and the other end of the air outlet section communicates with the liquid outlet hole; one end of the air return section communicates with the air outlet section, and the other end of the air return section penetrates through the connecting cover; the one-way valve is arranged in the air return section, and the atmosphere can pass through the one-way valve and enter the upper cavity.

[0013] Preferably, the one-way valve includes: two sealing flaps, the two sealing flaps are symmetrically arranged in the air return section, the sealing flaps are made of elastic material, a first wall surface is provided on one side of the sealing flap close to the air outlet section, a second wall surface is provided on the side of the sealing flap away from the air outlet section, the sealing flap is further provided with an abutting wall, the first wall surface is connected to the second wall surface through the abutting wall, the height of the connection end of the first wall surface and the abutting wall is less than the height of the other end thereof, and the height of the connection end of the second wall surface and the abutting wall is less than the height of the other end thereof; when the sealing flaps are in a natural state, the abutting walls of the two sealing flaps abut against each other.

[0014] Preferably, the one-way valve includes: an upper ring body, a lower ring body and a sealing member, the upper ring body is arranged in the air return section; the lower ring body is arranged in the air return section, a valve cavity is formed between the upper ring body and the lower ring body, the lower ring body is further provided with a through hole, one end of the through hole communicates with the air outlet section, and the other end of the through hole communicates with the valve cavity; the wall surface of the sealing member is adapted to fit with the inner ring walls of the upper ring body and the lower ring body; when the sealing member fits with the upper ring body or the lower ring body, there is a gap between the sealing member and the other ring body.

[0015] Preferably, the pressing head is further provided with a transition hole, the bottom end of the transition hole communicates with the mounting hole, the top end of the transition hole communicates with the liquid outlet hole, and the nozzle further includes: a foaming cylinder and a pore network, the foaming cylinder is arranged in the transition hole; at least one end of the foaming cylinder is provided with the pore network, and the air return section communicates with the end of the transition hole away from the mounting hole.

[0016] An application of the nozzle in the extrusion of laundry detergent, by weight, the components of the laundry detergent include: 11-15 parts of fatty alcohol ether sulfate, 3-5 parts of APG, 3-5 parts of AEO-9, 3.5-5 parts of MES-A, 4-5 parts of 1,2-propanediol, 2.5-3.5 parts of alpha-olefin sulfonate, 0.8-1.3 parts of glycerol, 0.08-0.12 parts of GLDA, and 65-70 parts of deionized water.

[0017] The functions of fatty alcohol ether sulfate (AES) in laundry detergent mainly include decontamination, wetting, foaming and emulsification, etc. AES is an anionic surfactant with excellent decontamination, emulsification, foaming properties and hard water resistance, and is gentle to the skin.

[0018] APG is a natural plant-based non-ionic surfactant, mainly made from natural raw materials such as coconut oil and corn starch, with good biodegradability and no environmental pollution. Its completely biodegradable property enables it to be completely decomposed in nature, avoiding the environmental pollution problems that traditional detergents may bring.

[0019] As a non-ionic surfactant, AEO-9 can effectively reduce the surface tension of water, making it easier for water molecules to penetrate into clothing fibers, thereby helping to disperse stain molecules and at the same time adsorbing on the surface of stains, making them easier to be removed by detergents.

[0020] MES-A can enhance the washing power and hard water resistance of the formula, reduce the dosage of water softener, reduce the deposition of inorganic salts on clothes, and make clothes softer.

[0021] Propylene glycol can enhance the emulsification, dispersion, stability and anti-freezing properties of laundry detergent, and can also inhibit the growth of bacteria and molds. However, the corresponding propylene glycol will also increase the viscosity of laundry detergent.

[0022] The functions of sodium α-olefin sulfonate (AOS) in laundry detergent mainly include improving detergency, improving foam performance and enhancing hard water resistance. AOS is an anionic surfactant with high foam and good hydrolysis stability, and has good hard water resistance, detergency, calcium dispersion ability and emulsification performance.

[0023] Glycerol can dissolve other chemical substances and help the detergent and other laundry detergent components to mix evenly. It can also increase the wettability of the detergent, making it easier to be evenly distributed on the surface of clothes and improving the cleaning effect. Glycerol has a certain antibacterial and anti-corrosion effect. Similarly, glycerol will also increase the viscosity of laundry detergent.

[0024] GLDA has excellent chelating ability and can form stable complexes with metal ions in water, thereby effectively reducing the concentration of metal ions in water and improving the washing effect.

[0025] Since the nozzle of the present invention has been improved, the applicant has increased the dosage of surfactants in the adopted laundry detergent formula, especially the dosage of APG. APG is alkyl polyglycoside and has a large number of hydrogen bonds. At low temperatures, the molecular thermal motion weakens, making it easier for hydrogen bonds between APG molecules to form and exist stably. These hydrogen bonds increase the intermolecular interaction force, resulting in an increase in the internal friction of the solution, thereby increasing the viscosity. In addition, APG can form micelle structures in water. At lower temperatures, these micelles may become more compact or change their shape and size, thereby affecting the rheological properties of the entire solution. For example, at low temperatures, the micelles may aggregate more closely to form larger aggregates, hindering the flow of the liquid and resulting in an increase in viscosity. In addition, the dosages of 1,2-propylene glycol and glycerol have also increased to a certain extent.

[0026] The present invention has at least the following beneficial effects:

[0027] In the nozzle provided by the present invention, the liquid storage component cooperates with the partition plate. When the pressing head is pressed down to extrude the solution in the liquid storage component, due to the movement of the partition plate, the volume change of the upper cavity in the air storage space per unit time increases significantly. Furthermore, the flow rate of the gas entering the air hole from the upper cavity can be increased, promoting the mixing between the gas flowing out of the air hole and the solution flowing out of the liquid storage component. At the same time, the proportion of the mixed gas will also increase, further improving the foam generation effect.

[0028] After applying the nozzle of the present invention to the extrusion of laundry detergent, the extrusion effect of the laundry detergent at low temperature can be improved, and thus the selectivity of the components can be improved. The applicable range of the components that are controlled in dosage to avoid too high viscosity in the prior art is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 The first structural schematic diagram of the nozzle applicable to high-viscosity solutions;

[0031] Figure 2 The second structural schematic diagram of the nozzle applicable to high-viscosity solutions;

[0032] Figure 3 The first structural schematic diagram of the air storage space;

[0033] Figure 4 The second structural schematic diagram of the air storage space;

[0034] Figure 5 The structural schematic diagram of the driving component;

[0035] Figure 6 For Figure 1 The detailed view of part A in

[0036] Figure 7 For Figure 2 The detailed view of part A in

[0037] Figure 8 For Figure 6 Another state schematic diagram of the check valve in

[0038] Figure 9 The structural schematic diagram of the improved pressing head;

[0039] Reference numerals: 1 - connecting cover, 101 - second elastic part, 2 - pressing head, 21 - liquid outlet hole, 22 - air hole, 221 - air outlet section, 222 - air return section, 223 - one-way valve, 2231 - upper ring body, 2232 - lower ring body, 2233 - valve cavity, 2234 - through hole, 2235 - seal, 23 - mounting hole, 24 - transition hole, 3 - liquid storage assembly, 31 - upper connecting cylinder, 311 - first elastic part, 32 - plunger, 33 - closed cylinder, 34 - moving cylinder, 35 - elastic member, 4 - tube body, 5 - air storage space, 51 - upper cavity, 52 - lower cavity, 6 - partition plate, 7 - lower connecting cylinder, 8 - driving assembly, 81 - first tooth member, 82 - second tooth member, 83 - gear, 9 - sealing flap, 91 - first wall surface, 92 - second wall surface, 93 - abutting wall, 10 - foaming cylinder, 11 - pore network. Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention.

[0041] Embodiment 1: As Figure 1 - Figure 2 shown, a nozzle applicable to high-viscosity solutions includes: a connecting cover 1, a pressing head 2, a liquid storage assembly 3 and a partition plate 6. The connecting cover 1 is provided with a through hole 2234; the pressing head 2 is sleeved in the through hole 2234 and has a degree of freedom of movement along the axial direction of the through hole 2234; the pressing head 2 is provided with a liquid outlet hole 21 and an air hole 22. One end of the air hole 22 is communicated with the liquid outlet hole 21, and the other end of the air hole 22 is communicated with the inner cavity of the connecting cover 1; one end of the liquid storage assembly 3 is connected to the pressing head 2, the other end of the liquid storage assembly 3 is connected to the connecting cover 1, the liquid outlet end of the liquid storage assembly 3 is communicated with the liquid outlet hole 21, and the liquid inlet end of the liquid storage assembly 3 is communicated with a tube body 4 configured by the connecting cover 1; an air storage space 5 is left between the outer wall of the liquid storage assembly 3 and the inner wall of the connecting cover 1; a partition plate 6 is provided on the outer wall of the liquid storage assembly 3, and the partition plate 6 divides the air storage space 5 into an upper cavity 51 and a lower cavity 52; when the pressing head 2 is pressed down, the nozzle discharges liquid and the partition plate 6 moves towards the direction close to the pressing head 2.

[0042] In the specific implementation process, the connecting cover 1 can be connected to the container for holding the solution through internal threads, and the tube body 4 at the lower end of the connecting cover 1 extends into the solution. A sliding connection can be adopted between the connecting cover 1 and the pressing head 2. For example, a slider is arranged on the outer wall of the pressing head 2, and a sliding groove is arranged in the through hole 2234, and the sliding connection and the limit of the sliding path are realized through the cooperation of the slider and the sliding groove. The structures for sucking the solution into the liquid storage chamber and squeezing out the solution in the liquid storage chamber in the liquid storage assembly 3 can refer to the prior art and can be not improved in this embodiment. A partition 6 is added to the liquid storage assembly 3 in this embodiment on the basis of the existing function of the liquid storage assembly 3. Elastic materials such as rubber can be arranged at the edge of the partition 6 to isolate the upper cavity 51 from the lower cavity 52. As Figure 1 shown, with reference to the prior art, a light sealing ball can be arranged at the inlet end of the liquid outlet hole 21. A foaming net can be arranged at the outlet end of the liquid outlet hole 21.

[0043] During the operation, the pressing head 2 is pressed down, so that the solution stored in the liquid storage chamber flows from the liquid storage assembly 3 to the liquid outlet hole 21. At the same time, the partition 6 moves upward and cooperates with the downward movement of the pressing head 2 to greatly reduce the space of the upper cavity 51. The gas in the upper cavity 51 flows from the air hole 22 to the liquid outlet hole 21. Before the gas and the solution enter the liquid outlet hole 21, the two first converge in the mixing chamber, and after mixing, they push open the sealing ball and enter the liquid outlet hole 21 to realize liquid outlet. After the liquid outlet is finished, the pressing head 2 resets. At this time, the space for accommodating the solution in the liquid storage assembly 3 becomes larger, and the solution is sucked, and enters the liquid storage chamber from the tube body 4. A sealing ball can also be arranged at the top end of the tube body 4. When sucking the solution, the sealing ball is pushed open, and the top opening of the tube body 4 is released. After the sucking is finished, the sealing ball falls back to block the top opening of the tube body 4. At the same time as the pressing head 2 resets, the partition 6 moves downward and resets, and the volume of the upper cavity 51 in the air storage space 5 increases, and the atmosphere enters the upper cavity 51 from the air hole 22.

[0044] In this embodiment, the liquid storage assembly 3 cooperates with the partition 6, so that when the pressing head 2 is pressed down to squeeze out the solution in the liquid storage assembly 3, due to the movement of the partition 6, the volume change of the upper cavity 51 in the air storage space 5 per unit time increases significantly, thereby increasing the flow rate of the gas entering the air hole 22 from the upper cavity 51, promoting the mixing of the gas flowing out of the air hole 22 and the solution flowing out of the liquid storage assembly 3, and at the same time, the volume ratio of the mixed gas will also increase, further improving the foam generation effect.

[0045] Embodiment 2: In order to realize the installation and drive of the partition 6, improvements are made on the basis of Embodiment 1, as Figure 1 - Figure 3As shown, in this embodiment, the pressing head 2 is provided with a mounting hole 23, and the mounting hole 23 communicates with the air hole 22. One end of the connecting cover 1 away from the pressing head 2 is provided with a lower connecting cylinder 7. The liquid storage assembly 3 includes: an upper connecting cylinder 31, a plunger 32, a closed cylinder 33, a moving cylinder 34, and an elastic member 35. One end of the upper connecting cylinder 31 is installed in the mounting hole 23, and the other end of the upper connecting cylinder 31 extends into the connecting cover 1; one end of the plunger 32 is hung on the top opening of the upper connecting cylinder 31; the outer wall of the closed cylinder 33 is connected to the inner wall of the lower connecting cylinder 7, and the other end of the plunger 32 passes through the closed cylinder 33, and the other end of the plunger 32 is used to block the top opening of the closed cylinder 33; one end of the moving cylinder 34 is connected to the upper connecting cylinder 31 through a driving assembly 8, and the other end of the moving cylinder 34 is slidably connected to the lower connecting cylinder 7. The outer wall of the moving cylinder 34 is connected to the partition 6, and the moving direction of the moving cylinder 34 is opposite to that of the upper connecting cylinder 31; the elastic member 35 is sleeved on the lower connecting cylinder 7, one end of the elastic member 35 is connected or abutted to the bottom end of the moving cylinder 34, and the other end of the elastic member 35 is connected or abutted to the inner wall of the connecting cover 1.

[0046] In the specific implementation process, the elastic member 35 can be a spring. The upper connecting cylinder 31 can be sleeved inside the mounting hole 23 and clamped with the inner wall of the mounting hole 23. The top of the upper connecting cylinder 31 can be as Figure 1 shown, a tapered hole is opened. The shape of the top of the plunger 32 matches the tapered hole and is located above the tapered hole. The bottom side wall of the closed cylinder 33 can be referred to Figure 1 shown, and is connected to the inner wall of the lower connecting cylinder 7 through an annular connecting member. The bottom end of the plunger 32 can be as Figure 1 shown, set to be spherical, and an arc surface is arranged at the top opening of the closed cylinder 33, so that the spherical bottom end of the plunger 32 can block the opening of the closed cylinder 33.

[0047] The elastic member 35 is used for the reset after the pressing head 2 is pressed down. Therefore, there are at least the following two setting methods for the elastic member 35:

[0048] Exemplarily, as shown in Figure 1 , the elastic member 35 can be sleeved on the closed cylinder 33. The upper end of the elastic member 35 is connected or abutted to the end of the upper connecting cylinder 31, and the lower end of the elastic member 35 is connected or abutted to the closed cylinder 33. After the pressing head 2 finishes pressing down, the resilience of the elastic member 35 directly acts on the upper connecting cylinder 31, and drives the pressing head 2 to move up through the upper connecting cylinder 31.

[0049] Exemplarily, as shown in Figure 3 , the elastic member 35 is set according to the technical solution in this embodiment. When the pressing head 2 finishes pressing down, the elastic member 35 retracts, drives the moving cylinder 34 to move down, and then the moving cylinder 34 drives the upper connecting cylinder 31 to move up.

[0050] Of course, elastic members 35 can also be provided at both of the above two positions. In this embodiment, Figure 3 The purpose of the shown setting method is that the elastic member 35 is generally made of metal, and the liquid storage component 3 is a storage space for the solution. If the elastic member 35 is arranged inside the liquid storage component 3 and is in direct contact with the solution, it may affect the performance or efficacy of the solution.

[0051] When the pressing head 2 is pressed downwards, the upper connecting cylinder 31 moves downwards, and the plunger 32 also moves downwards accordingly. The top of the closing cylinder 33 is opened, and the solution is pressed upwards and pushes up the top end of the plunger 32, flowing out from the gap between the plunger 32 and the upper connecting cylinder 31. When the upper connecting cylinder 31 moves downwards, the moving cylinder 34 is driven to move upwards through the driving component 8, and then the moving cylinder 34 drives the partition plate 6 to move upwards.

[0052] After the pressure applied to the pressing head 2 is released, under the action of the resilience of the elastic member 35, the upper connecting cylinder 31 moves upwards, sucking the solution into the liquid storage component 3, and the spherical bottom end of the plunger 32 seals the top opening of the closing cylinder 33. During the upward movement of the upper connecting cylinder 31, the partition plate 6 is driven to move downwards, the upper cavity 51 becomes larger, the pressure decreases, and the outside air enters the upper cavity 51 from the air hole 22.

[0053] Embodiment 3: In order to simply realize the reverse movement of the partition plate 6 and the pressing head 2, improvements are made on the basis of Embodiment 2, as Figure 3 - Figure 5 shown. In this embodiment, the driving component 8 includes: a first tooth component 81, a second tooth component 82, and a gear 83. The first tooth component 81 is provided on the outer wall of the upper connecting cylinder 31; the second tooth component 82 is provided on the inner wall of the moving cylinder 34; the gear 83 is installed at the end of the lower connecting cylinder 7, and the first tooth component 81 and the second tooth component 82 are respectively arranged on both sides of the gear 83 and are in transmission connection with the gear 83.

[0054] In the specific implementation process, the first tooth component 81 can be integrally formed with the upper connecting cylinder 31, and the second tooth component 82 can also be integrally formed with the moving cylinder 34. The gear 83 can be supported by a frame at the end of the lower connecting cylinder 7. The structures of the first tooth component 81 and the second tooth component 82 can adopt tooth bar shapes. The upper connecting cylinder 31, the moving cylinder 34, and the lower connecting cylinder 7 can adopt cylinders with a square cross-section, and the first tooth component 81 and the second tooth component 82 can be provided on the four side walls of the cylinder. In order to increase the stability of the movement of the moving cylinder 34, the upper end of the moving cylinder 34 can be slidably connected to the upper connecting cylinder 31, and the lower end of the moving cylinder 34 can be slidably connected to the lower connecting cylinder 7.

[0055] Embodiment 4: In order to further improve the applicability of the nozzle to high-viscosity solutions, improvements are made on the basis of Embodiments 1-3, as Figure 1As shown in the figure, in this embodiment, a first elastic part 311 is provided on the side wall of the upper connecting cylinder 31, and the first elastic part 311 is located above the lower connecting cylinder 7; when the partition 6 moves towards the pressing head 2, V1≥7.5V2; where V1 represents the reduction in the volume of the upper cavity 51 caused by the movement of the partition 6, and V2 represents the increase in the volume of the upper cavity 51 caused by the deformation of the first elastic part 311.

[0056] In the specific implementation process, a plurality of first elastic parts 311 can be arranged around the circumference of the upper connecting cylinder 31. The first elastic part 311 can be made of materials such as rubber or silica gel. The first elastic part 311 can be set as circular. Through the setting of the first elastic part 311 in this embodiment, the upward movement of the partition 6 can not only promote the flow of gas in the upper cavity 51, but also promote the flow of the high-viscosity solution in the liquid storage bin.

[0057] When the pressing head 2 is pressed down, the partition 6 moves upward, the pressure inside the upper cavity 51 increases, and the first elastic part 311 bulges into the upper connecting cylinder 31. Although it will reduce the flow rate of the gas in the upper cavity 51 to a certain extent, through the extrusion of the first elastic part 311, the high-viscosity solution can flow more easily. Thus, under the action of the same downward pressure, it is easy to drive the high-viscosity solution to flow out from the liquid storage bin assembly 3. Furthermore, in this embodiment, the movement of the partition 6 can not only increase the outflow speed and outflow volume of the air flow in the upper cavity 51, but also increase the outflow speed of the solution in the liquid storage bin assembly 3, further increasing the gas-liquid mixing degree. When the pressing head 2 returns to its original position, the deformation of the first elastic part 311 can also promote the high-viscosity solution to enter the liquid storage bin.

[0058] Since the proportion of V2 in V1 will affect the distribution of the promotion effects on gas and liquid when the partition 6 moves, the proportional relationship between the two will affect the foaming effect after gas-liquid mixing.

[0059] Embodiment 5: In order to make the downward pressing more labor-saving, an improvement is made on the basis of Embodiment 4, as Figure 4 shown in the figure, in this embodiment, a second elastic part 101 is provided at the bottom end of the connecting cover 1.

[0060] In the specific implementation process, Figure 3 the bottom end of the connecting cover 1 can be in an open state, thereby avoiding the influence of the pressure change in the lower cavity 52 on the upward movement of the partition 6, but the closed state can promote the downward movement of the partition 6. Thus, whether the bottom end of the connecting cover 1 is open can be selected according to needs. In addition, if the whole bottom end of the connecting cover 1 is made of a hard material, in order to avoid the micro-negative pressure in the solution container, an air intake channel can be provided at the top of the gap between the connecting part of the connecting cover 1 and the container mouth and the outer wall of the lower cavity 52. One end of the air intake channel is communicated with the atmosphere, and the other end of the air intake channel is communicated with the solution container. A one-way valve 223 can be provided in the air intake channel.

[0061] This embodiment provides an improved method for closing the bottom end of the connecting cover 1. A second elastic member 35 is added to its bottom end, and the second elastic portion 101 can be as Figure 4 shown, and is set as an arc surface. The second elastic member 35 can be made of rubber or silica gel. Since the second elastic member 35 will be placed in the container containing the solution, it is necessary to pay attention that the height of the solution should not be too high to avoid the solution directly contacting the second elastic member 35. When the partition 6 moves up and down, the second elastic member 35 can deform accordingly, thereby reducing the force required for the partition 6 to move upward. In addition, the second elastic member 35 can deform to adapt to the change of the internal pressure in the solution container, avoiding or reducing the deformation of the container, and can be applied to the use of small-volume containers, such as travel-sized laundry detergent containers.

[0062] Embodiment 6: In order to allow external air to enter the upper cavity 51, an improvement is made on the basis of Embodiment 4. As Figure 1 - Figure 2 shown, in this embodiment, the air hole 22 includes an air outlet section 221, a return air section 222, and a one-way valve 223. One end of the air outlet section 221 is communicated with the inner cavity of the connecting cover 1, and the other end of the air outlet section 221 is communicated with the liquid outlet hole 21; one end of the return air section 222 is communicated with the air outlet section 221, and the other end of the return air section 222 penetrates through the connecting cover 1; the one-way valve 223 is arranged in the return air section 222, and the atmosphere can pass through the one-way valve 223 and enter the upper cavity 51.

[0063] In the specific implementation process, multiple air outlet sections 221 can be provided. The multiple air outlet sections 221 are arranged around the mounting hole 23. The return air section 222 can be communicated with one or some of the air outlet sections 221, and the air outlet section 221 can also be in an overall annular shape. Using multiple independent air outlet sections 221 can increase the gas outflow speed in the air outlet section 221, thereby increasing the gas-liquid mixing degree and improving the foaming effect. When the partition 6 moves upward, the one-way valve 223 closes, and the gas enters the air-liquid mixing chamber from the air outlet section 221, mixes with the solution, and then enters the liquid outlet hole 21. When the partition 6 moves downward, the internal pressure in the upper cavity 51 decreases, and external air enters the upper cavity 51 through the one-way valve 223.

[0064] The connection end of the return air section 222 with the atmosphere can be as Figure 1 shown, arranged at the top of the pressing head 2, or can be as Figure 2 shown, arranged at the side of the pressing head 2. If the structure of the return air section 222 as Figure 1 shown is adopted, when continuously pressing the pressing head 2 with the palm, the palm is likely to cover the inlet end of the return air section 222, which will affect the return air during the continuous pressing process. Therefore, the return air section 222 can adopt the structure as Figure 2 shown.

[0065] Embodiment 7: This embodiment provides a structure of the one-way valve 223. As Figure 6As shown, the one-way valve 223 includes: two sealing flaps 9, the two sealing flaps 9 are symmetrically arranged in the gas return section 222, the sealing flaps 9 are made of an elastic material, a first wall surface 91 is provided on one side of the sealing flap 9 close to the gas outlet section 221, a second wall surface 92 is provided on the side of the sealing flap 9 away from the gas outlet section 221, the sealing flap 9 is further provided with an abutting wall 93, the first wall surface 91 is connected to the second wall surface 92 through the abutting wall 93, the height of the connecting end of the first wall surface 91 and the abutting wall 93 is less than the height of the other end thereof, and the height of the connecting end of the second wall surface 92 and the abutting wall 93 is less than the height of the other end thereof; when the sealing flap 9 is in a natural state, the abutting walls 93 of the two sealing flaps 9 abut against each other.

[0066] In the specific implementation process, the sealing flap 9 can be made of rubber or silica gel. The connection method between the sealing flap 9 and the gas return section 222 is not limited in this embodiment, and can be as Figure 6 shown, an installation ring is arranged in the gas return section 222, the sealing flap 9 passes through the installation ring and is connected to the installation ring, and the installation ring can provide support for the sealing flap 9. The first wall surface 91 can adopt an arc surface as Figure 6 shown. When discharging liquid, the gas in the gas outlet section 221 presses the arc-shaped first wall surface 91, so that the first wall surfaces 91 of the two sealing flaps 9 tend to approach each other, and further the fitting of the two abutting walls 93 is closer, and the gas only flows to the gas-liquid mixing chamber at the top outlet of the liquid storage assembly 3. The abutting wall 93 can adopt a longitudinal flat wall. The second wall surface 92 can adopt an inclined wall or a semi-conical wall as Figure 6 shown. When the partition plate 6 moves downward and the volume of the upper cavity 51 increases and the internal pressure decreases, under the action of the external atmospheric pressure, the second wall surface 92 drives the abutting walls 93 of the two sealing flaps 9 to move away from each other, and the external atmosphere enters the upper cavity 51 to realize the gas return of the gas chamber.

[0067] The structure of the one-way valve 223 adopted in this embodiment is not directly applied to the liquid outlet hole 21 or the pipe body 4 to replace the sealing ball. The main reason is that the structure of the one-way valve 223 in this embodiment is generally made of an elastic material such as rubber, and it is not easy to be directly contacted with certain solutions. The sealing flap 9 may react with one or some components in the solution, which will not only affect the properties of the solution, but also affect the sealing effect of the sealing flap 9.

[0068] Embodiment 8: This embodiment provides another structure of the one-way valve 223, as Figure 7 - Figure 8As shown, the one-way valve 223 includes an upper ring body 2231, a lower ring body 2232, and a seal 2235. The upper ring body 2231 is disposed in the gas return section 222; the lower ring body 2232 is disposed in the gas return section 222. A valve cavity 2233 is formed between the upper ring body 2231 and the lower ring body 2232. The lower ring body 2232 is further provided with a through hole 2234. One end of the through hole 2234 communicates with the gas outlet section 221, and the other end of the through hole 2234 communicates with the valve cavity 2233; the wall surface of the seal 2235 is adapted to fit with the inner ring walls of the upper ring body 2231 and the lower ring body 2232; when the seal 2235 fits with the upper ring body 2231 or the lower ring body 2232, there is a gap between the seal 2235 and the other ring body.

[0069] In the specific implementation process, when the seal 2235 fits with the upper ring body 2231, the other ring body is the lower ring body 2232. Conversely, the other ring body is the upper ring body 2231. The seal 2235 can be a lightweight sealing ball as shown in Figure 7 . The upper ring body 2231 and the lower ring body 2232 are provided with arc-shaped inner ring walls that cooperate with the sealing ball. The shape and specific position of the through hole 2234 are not limited in this embodiment. The through hole 2234 is as shown in Figure 7 . It is provided as a cylindrical hole body, or can be provided as an annular hole body. The central axis of the annular hole body can coincide with the central axis of the lower ring body 2232. When the partition 6 moves upward, the pressure in the upper cavity 51 increases, and the seal 2235 moves upward to fit with the upper ring body 2231, realizing the isolation between the gas return section 222 and the gas outlet section 221. When the partition 6 moves downward, the pressure in the upper cavity 51 decreases, and the seal 2235 falls back to fit with the lower ring body 2232 under the action of atmospheric pressure and its own gravity. At this time, the gas return section 222 communicates with the gas outlet section 221 through the valve cavity 2233 and the through hole 2234, thereby realizing the gas return of the upper cavity 51.

[0070] Embodiment 9: In order to further increase the applicability of the nozzle to high-viscosity solutions, improvements are made on the basis of Embodiment 6. As shown in Figure 9 , in this embodiment, the pressing head 2 is further provided with a transition hole 24. The bottom end of the transition hole 24 communicates with the mounting hole 23, and the top end of the transition hole 24 communicates with the liquid outlet hole 21. The nozzle further includes a foaming cylinder 10 and a pore network 11. The foaming cylinder 10 is disposed in the transition hole 24; at least one end of the foaming cylinder 10 is provided with the pore network 11. The gas return section 222 communicates with one end of the transition hole 24 away from the mounting hole 23.

[0071] In the specific implementation process, the one-way valve 223 can be as shown in Figure 7 or Figure 8The structure shown. In order for the nozzle to be applicable to scenarios with higher requirements for foaming effect, in this embodiment, a pore mesh 11 is added to the liquid outlet path of the nozzle, and the small holes of the pore mesh 11 are used to improve the gas-liquid mixing degree and foam fineness, etc. The foaming cylinder 10 is used for connecting the pore mesh 11 and providing a channel for the gas-liquid mixture. As shown in Figure 9 As shown, pore meshes 11 are provided at both the upper and lower ends of the foaming cylinder 10, and the aperture of the lower pore mesh 11 can be larger than that of the upper pore mesh 11. When the extrusion pressing head 2 is pressed, gas flows out from the air outlet section 221, and the solution synchronously flows out from the liquid storage assembly 3. The liquid and gas are initially mixed and foamed, then the gas-liquid mixture flows upward and passes through the lower pore mesh 11 to achieve secondary mixing and foaming, and finally passes through the upper pore mesh 11 to achieve tertiary mixing and foaming. When the temperature drops, the residual solution at the pore mesh 11 may, due to the temperature and the small volume of the residual solution, have a sharp increase in viscosity, resulting in a certain degree of blockage of the pore mesh 11. In addition, if there are certain solid functional substances in the solution, such as solid silica in some laundry detergents, it may also increase the possibility of blockage of the pore mesh 11. Therefore, in this embodiment, the effect of the gas during backflow is also utilized to make the pore mesh 11 as free as possible from the retention of solution and solid particles.

[0072] In this embodiment, the backflow section 222 is no longer directly connected to the air outlet section 221, but is connected to the air outlet section 221 through the transition hole 24. During backflow, the outside air sequentially passes through the backflow section 222, the upper pore mesh 11, the lower pore mesh 11, and the air outlet section 221, and finally enters the upper cavity 51. During the backflow process, the high-viscosity solution or solid particles remaining at the pore mesh 11 can be made to fall back through the air flow, which can reduce the possibility of blockage of the pore mesh 11 caused by the increase in the viscosity of the remaining small volume of solution due to a sudden drop in temperature before the next use.

[0073] Example 10: This embodiment provides an application of the nozzle in the extrusion of laundry detergent. By weight, the components of the laundry detergent include: 11-15 parts of fatty alcohol polyoxyethylene sulfate, 3-5 parts of APG, 3-5 parts of AEO-9, 3.5-5 parts of MES-A, 4-5 parts of 1,2-propanediol, 2.5-3.5 parts of α-olefin sulfonate, 0.8-1.3 parts of glycerol, 0.08-0.12 parts of GLDA, and 65-70 parts of deionized water.

[0074] During the specific implementation process, due to the different applicable objects and usage processes, the requirements for the performance of hand-washing laundry detergent are also somewhat different from those of machine-washing laundry detergent. Since hand-washing laundry detergent will come into contact with the skin, it is relatively mild. In addition, the clothes that need to be hand-washed may have stubborn stains, so the requirement for the detergency ability will relatively increase. In addition, in order to accelerate the penetration of the surfactant into the fabric fibers during hand-washing, the applicant expects the hand-washing laundry detergent to directly foam when discharging the liquid.

[0075] When the applicant was adjusting the formula of the hand-washing laundry detergent, it was found that when using the existing nozzle, the foaming effect of the laundry detergent under the parameters of the best washing effect was significantly reduced in winter, and blockage might occur. After investigation, it was found that when the temperature was relatively low in winter, the viscosity of the laundry detergent under the formula of this embodiment increased significantly, and the use of the foaming nozzle was restricted. Users might need to replace it with a common liquid outlet nozzle to better use the laundry detergent. Therefore, the applicant made relevant improvements to the nozzle structure, and at the same time hoped that the nozzle adopted in the present invention was not only applicable to laundry detergent, but also applicable to other high-viscosity solution scenarios.

[0076] Experiment: Use the nozzle provided in this case to conduct an extrusion experiment on the laundry detergent and observe the performance of the foam. During the experiment, the temperature of the laundry detergent was -10°C. Each group of experiments was tested five times and the average value was taken. The experimental results are shown in Table 1.

[0077] Among them, the laundry detergent used the ratio with the best detergency. By weight, the laundry detergent included 11 parts of fatty alcohol polyoxyethylene sulfate, 5 parts of APG, 4 parts of AEO-9, 5 parts of MES-A, 5 parts of 1,2-propanediol, 3 parts of alpha-olefin sulfonate, 1.2 parts of glycerol, 0.1 part of GLDA, and 65 parts of deionized water.

[0078] Among them, the nozzle structure adopted the following test examples and comparative examples respectively, and the pumping volume of the liquid storage tank was 4 ml.

[0079] Test Example 1: A nozzle suitable for high-viscosity solutions, comprising: a connection cover, a pressing head, a liquid storage assembly, and a partition. The connection cover is provided with a through hole; the pressing head is sleeved in the through hole and has a degree of freedom of movement along the axial direction of the through hole; the pressing head is provided with a liquid outlet hole and an air hole, one end of the air hole is communicated with the liquid outlet hole, and the other end of the air hole is communicated with the inner cavity of the connection cover; one end of the liquid storage assembly is connected to the pressing head, the other end of the liquid storage assembly is connected to the connection cover, the liquid outlet end of the liquid storage assembly is communicated with the liquid outlet hole, and the liquid inlet end of the liquid storage assembly is communicated with a pipe body configured by the connection cover; there is an air storage space between the outer wall of the liquid storage assembly and the inner wall of the connection cover; a partition is provided on the outer wall of the liquid storage assembly, and the partition divides the air storage space into an upper cavity and a lower cavity; when the pressing head is pressed down, the nozzle discharges liquid and the partition moves towards the pressing head. The pressing head is provided with a mounting hole, and the mounting hole is communicated with the air hole. The end of the connection cover away from the pressing head is provided with a lower connection cylinder. The liquid storage assembly includes: an upper connection cylinder, a plunger, a closed cylinder, a moving cylinder, and an elastic member. One end of the upper connection cylinder is installed in the mounting hole, and the other end of the upper connection cylinder extends into the connection cover; one end of the plunger is hung on the top opening of the upper connection cylinder; the outer wall of the closed cylinder is connected to the inner wall of the lower connection cylinder, and the other end of the plunger passes through the closed cylinder, and the other end of the plunger is used to block the top opening of the closed cylinder; one end of the moving cylinder is connected to the upper connection cylinder through a driving assembly, the other end of the moving cylinder is slidably connected to the lower connection cylinder, the outer wall of the moving cylinder is connected to the partition, and the moving direction of the moving cylinder is opposite to that of the upper connection cylinder; the elastic member is sleeved on the lower connection cylinder, one end of the elastic member is connected or abutted against the bottom end of the moving cylinder, and the other end of the elastic member is connected or abutted against the inner wall of the connection cover. The driving assembly includes: a first tooth component, a second tooth component, and a gear. The first tooth component is provided on the outer wall of the upper connection cylinder; the second tooth component is provided on the inner wall of the moving cylinder; the gear is installed at the end of the lower connection cylinder, and the first tooth component and the second tooth component are respectively arranged on both sides of the gear and are in transmission connection with the gear. The side wall of the upper connection cylinder is provided with a first elastic part, and the first elastic part is located above the lower connection cylinder; when the partition moves towards the pressing head, V1 = 7.5V2; where V1 represents the reduction amount of the volume of the upper cavity caused by the movement of the partition, and V2 represents the increase amount of the volume of the upper cavity caused by the deformation of the first elastic part. The bottom end of the connection cover is provided with a second elastic part.The one-way valve includes: two sealing flaps, which are symmetrically arranged in the air return section. The sealing flaps are made of elastic material. One side of the sealing flap close to the air outlet section is provided with a first wall surface, and the other side of the sealing flap far from the air outlet section is provided with a second wall surface. The sealing flap is also provided with an abutting wall. The first wall surface is connected to the second wall surface through the abutting wall. The height of the connecting end of the first wall surface and the abutting wall is less than that of its other end, and the height of the connecting end of the second wall surface and the abutting wall is less than that of its other end. When the sealing flaps are in the natural state, the abutting walls of the two sealing flaps abut against each other. The pressing head is also provided with a transition hole, the bottom end of the transition hole is communicated with the installation hole, and the top end of the transition hole is communicated with the liquid outlet hole. The nozzle further includes: a foaming cylinder and a pore network. The foaming cylinder is arranged in the transition hole. The foaming cylinder is provided with the pore network at at least one end. The air return section is communicated with the end of the transition hole far from the installation hole.

[0080] Test Example 2: The difference from Test Example 1 is that V1 = 8.5V2.

[0081] Test Example 3: The difference from Test Example 1 is that V1 = 10V2.

[0082] Comparative Example 1: The difference from Test Example 2 is that V1 = 7V2.

[0083] Comparative Example 2: The difference from Test Example 2 is that the upper connecting cylinder is not provided with the first elastic part.

[0084] Blank Example: An existing nozzle is adopted.

[0085] Table 1

[0086] Test Example 1 Test Example 2 Test Example 3 Comparative Example 1 Comparative Example 2 Blank Example Foaming Ratio 39.8 43.2 40.1 32.4 30.6 26.7 Half - life 16.7 18.4 17.8 16.0 14.5 13.2

[0087] The half-life refers to the time required for the volume of the foam to decrease to half of the initial volume, and the unit is min.

[0088] From the comparison between Test Examples 1-3 and the Blank Example, it can be seen that the nozzle provided by the present invention can greatly improve the foaming multiple and foam stability of the laundry detergent at low temperature, and the nozzle provided by Test Example 2 has better effects.

[0089] From the comparison between Comparative Example 1 and Test Example 2, it can be seen that the proportional relationship between V1 and V2 will affect the gas-liquid ratio and gas-liquid flow rate, and thus affect the final foam properties. When V1 ≥ 7.5V2, the influence of its ratio on the foam properties increases significantly.

[0090] From the comparison between Comparative Example 2 and Test Example 2, it can be seen that the setting of the first elastic part can improve the fineness and stability of the foam.

[0091] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A nozzle applicable to high-viscosity solutions, characterized in that, Comprising: A connecting cover (1), the connecting cover (1) being provided with a through hole (2234); A pressing head (2), the pressing head (2) being sleeved in the through hole (2234) and having a degree of freedom of movement along the axial direction of the through hole (2234); the pressing head (2) is provided with a liquid outlet hole (21) and an air hole (22), one end of the air hole (22) is communicated with the liquid outlet hole (21), and the other end of the air hole (22) is communicated with the inner cavity of the connecting cover (1); A liquid storage assembly (3), one end of the liquid storage assembly (3) is connected to the pressing head (2), the other end of the liquid storage assembly (3) is connected to the connecting cover (1), the liquid outlet end of the liquid storage assembly (3) is communicated with the liquid outlet hole (21), and the liquid inlet end of the liquid storage assembly (3) is communicated with a pipe body (4) configured on the connecting cover (1); there is an air storage space (5) left between the outer wall of the liquid storage assembly (3) and the inner wall of the connecting cover (1); A partition plate (6), the outer wall of the liquid storage assembly (3) is provided with a partition plate (6), and the partition plate (6) divides the air storage space (5) into an upper cavity (51) and a lower cavity (52); When the pressing head (2) is pressed down, the nozzle discharges liquid and the partition plate (6) moves towards the direction close to the pressing head (2); The pressing head (2) is provided with a mounting hole (23), and the end of the connecting cover (1) far from the pressing head (2) is provided with a lower connecting cylinder (7), and the liquid storage assembly (3) includes: An upper connecting cylinder (31), one end of the upper connecting cylinder (31) is mounted in the mounting hole (23), and the other end of the upper connecting cylinder (31) extends into the connecting cover (1); A moving cylinder (34), one end of the moving cylinder (34) is connected to the upper connecting cylinder (31) through a driving assembly (8), the other end of the moving cylinder (34) is slidably connected to the lower connecting cylinder (7), and the outer wall of the moving cylinder (34) is connected to the partition plate (6); The driving assembly (8) includes: A first tooth member (81), the outer wall of the upper connecting cylinder (31) is provided with the first tooth member (81); A second tooth member (82), the inner wall of the moving cylinder (34) is provided with the second tooth member (82); A gear (83), the first tooth member (81) and the second tooth member (82) are respectively arranged on both sides of the gear (83) and are in transmission connection with the gear (83).

2. The nozzle for high-viscosity solutions according to claim 1, characterized in that, The liquid storage assembly (3) further includes: A plunger (32), one end of the plunger (32) is hung on the top opening of the upper connecting cylinder (31); A closed cylinder (33), the outer wall of the closed cylinder (33) is connected to the inner wall of the lower connecting cylinder (7), and the other end of the plunger (32) passes through the closed cylinder (33), and the other end of the plunger (32) is used to block the top opening of the closed cylinder (33); Elastic member (35), the elastic member (35) is sleeved outside the lower connecting cylinder (7), one end of the elastic member (35) is connected or abutted to the bottom end of the moving cylinder (34), and the other end of the elastic member (35) is connected or abutted to the inner wall of the connecting cover (1).

3. The nozzle for high-viscosity solutions according to claim 2, characterized in that, The gear (83) is installed at the end of the lower connecting cylinder (7); the mounting hole (23) communicates with the air hole (22); the moving direction of the moving cylinder (34) is opposite to that of the upper connecting cylinder (31).

4. The nozzle for high-viscosity solutions according to any one of claims 1-3, characterized in that, The side wall of the upper connecting cylinder (31) is provided with a first elastic part (311), and the first elastic part (311) is located above the lower connecting cylinder (7); When the partition plate (6) moves towards the pressing head (2), V1≥7.5V2; where V1 represents the volume reduction of the upper cavity (51) caused by the movement of the partition plate (6), and V2 represents the volume increase of the upper cavity (51) caused by the deformation of the first elastic part (311).

5. The nozzle for high-viscosity solutions according to claim 4, characterized in that, The bottom end of the connecting cover (1) is provided with a second elastic part (101).

6. The nozzle for high-viscosity solutions according to claim 4, characterized in that, The air hole (22) includes: An air outlet section (221), one end of the air outlet section (221) communicates with the inner cavity of the connecting cover (1), and the other end of the air outlet section (221) communicates with the liquid outlet hole (21); An air return section (222), one end of the air return section (222) communicates with the air outlet section (221), and the other end of the air return section (222) penetrates through the connecting cover (1); A one-way valve (223), the one-way valve (223) is arranged in the air return section (222), and the atmosphere can pass through the one-way valve (223) and enter the upper cavity (51).

7. The nozzle for high-viscosity solutions according to claim 6, characterized in that, The one-way valve (223) includes: Two sealing flaps (9), the two sealing flaps (9) are symmetrically arranged in the air return section (222), the sealing flaps (9) are made of elastic material, a first wall surface (91) is arranged on the side of the sealing flap (9) close to the air outlet section (221), a second wall surface (92) is arranged on the side of the sealing flap (9) far from the air outlet section (221), the sealing flap (9) is also provided with an abutting wall (93), the first wall surface (91) is connected to the second wall surface (92) through the abutting wall (93), the height of the connecting end of the first wall surface (91) and the abutting wall (93) is less than that of its other end, and the height of the connecting end of the second wall surface (92) and the abutting wall (93) is less than that of its other end; When the sealing flap (9) is in a natural state, the abutting walls (93) of the two sealing flaps (9) abut against each other.

8. The nozzle for high-viscosity solutions according to claim 6, characterized in that, The one-way valve (223) includes: An upper ring body (2231), the upper ring body (2231) is arranged in the air return section (222); A lower ring body (2232), the lower ring body (2232) is arranged in the gas return section (222), a valve cavity (2233) is formed between the upper ring body (2231) and the lower ring body (2232), the lower ring body (2232) is further provided with a through hole (2234), one end of the through hole (2234) communicates with the air outlet section (221), and the other end of the through hole (2234) communicates with the valve cavity (2233); A seal (2235), the wall surface of the seal (2235) is adapted to fit with the inner ring walls of the upper ring body (2231) and the lower ring body (2232); when the seal (2235) fits with the upper ring body (2231) or the lower ring body (2232), there is a gap between the seal (2235) and the other ring body.

9. The nozzle for high-viscosity solutions according to claim 6, characterized in that, The pressing head (2) is further provided with a transition hole (24), the bottom end of the transition hole (24) communicates with the mounting hole (23), the top end of the transition hole (24) communicates with the liquid outlet hole (21), and the nozzle further includes: A foaming cylinder (10), the foaming cylinder (10) is arranged in the transition hole (24); A pore network (11), the foaming cylinder (10) is provided with the pore network (11) at at least one end, and the gas return section (222) communicates with the end of the transition hole (24) far from the mounting hole (23).

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