CN119793738B - Nozzle suitable for high-viscosity solution and application of nozzle in extrusion of liquid laundry detergent - Google Patents

Abstract

The invention relates to the field of nozzles, and provides a nozzle suitable for high-viscosity solution and application thereof in extrusion of laundry detergent, which aims to solve the problem that the foaming effect is reduced when the existing nozzle is applied to the high-viscosity solution; 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, the other end of the air hole is communicated with the inner cavity of the connecting cover, one end of the liquid bin assembly is connected with the pressing head, the other end of the liquid bin assembly is connected with the connecting cover, the liquid outlet end of the liquid bin assembly is communicated with the liquid outlet hole, a gas bin space is reserved between the outer wall of the liquid bin assembly and the inner wall of the connecting cover, and a partition plate is arranged on the outer wall of the liquid bin assembly and divides the gas bin space into an upper cavity and a lower cavity. When the pressing head is pressed downwards to extrude the solution in the liquid bin assembly, the mixing between the gas flowing out of the air hole and the solution flowing out of the liquid bin assembly is promoted.

Description

A nozzle suitable for high-viscosity solution and its application in laundry detergent extrusion

Technical Field

The invention relates to the field of nozzles, and in particular to a nozzle suitable for high-viscosity solutions and application of the nozzle in laundry detergent extrusion.

Background Art

For liquids that need to foam when sprayed, a nozzle with a special structure is usually required to mix the liquid with air during the spraying process. In order to promote the formation of foam and increase the fineness and stability of the foam, a mesh structure can also be added to the space where the gas and liquid are mixed.

For laundry detergent, its viscosity will increase significantly at low temperatures. The increase in viscosity will not only affect the flow of laundry detergent, but also affect its mixing process with air. Some laundry detergents may even produce solid particles due to low temperatures. Therefore, the foaming effect of laundry detergent in winter will be relatively reduced, the extrusion force will also be relatively increased, and even the nozzle may be blocked.

Summary of the invention

The purpose of the present invention is to provide a nozzle suitable for high-viscosity solutions, so as to solve the problem that the foaming effect of the existing nozzle is reduced when it is used for high-viscosity solutions.

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

The embodiments of the present invention are implemented by the following technical solutions:

A nozzle suitable for high-viscosity solution, comprising: a connecting cover, a pressing head, a liquid storage component and a partition, the connecting cover is provided with a through hole; the pressing head is sleeved on the through hole and has the 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 connected to the liquid outlet hole, and the other section of the air hole is connected to the inner cavity of the connecting cover; one end of the liquid storage component is connected to the pressing head, and the other end of the liquid storage component is connected to the connecting cover, the liquid outlet end of the liquid storage component is connected to the liquid outlet hole, and the liquid inlet end of the liquid storage component is connected to the tube body configured with the connecting cover; an air storage space is reserved between the outer wall of the liquid storage component and the inner wall of the connecting cover; the outer wall of the liquid storage component is provided with a partition, 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 in a direction close to the pressing head.

Preferably, the pressing head is provided with a mounting hole, the mounting hole is connected to the air hole, and the connecting cover is provided with a lower connecting cylinder at one end away from the pressing head, and the liquid tank assembly comprises: an upper connecting cylinder, a plunger, a closing 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 to the inside of the connecting cover; one end of the plunger is hung on the top opening of the upper connecting cylinder; the outer wall of the closing cylinder is connected to the inner wall of the lower connecting cylinder, the other end of the plunger is penetrated through the closing cylinder, and the other end of the plunger is used to block the top opening of the closing 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, 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 with the bottom end of the moving cylinder, and the other end of the elastic member is connected or abutted with the inner wall of the connecting cover.

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 movable cylinder; the gear is installed at the end of the lower connecting cylinder, the first tooth component and the second tooth component are respectively provided on both sides of the gear and are transmission connected to the gear.

Preferably, the side wall of the upper connecting tube is provided with a first elastic part, and the first elastic part is located above the lower connecting tube; when the partition moves toward the pressing head, V ₁ ≥7.5V ₂ ; wherein V ₁ represents the reduction in volume of the upper cavity caused by the movement of the partition, and V ₂ represents the increase in volume of the upper cavity caused by the deformation of the first elastic part.

Preferably, a second elastic portion is provided at the bottom end of the connecting cover.

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 is connected to the inner cavity of the connecting cover, and the other end of the air outlet section is connected to the liquid outlet hole; one end of the air return section is connected to the air outlet section, and the other end of the air return section passes 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.

Preferably, the one-way valve includes: two sealing flaps, the two sealing flaps are symmetrically arranged in the return air section, the sealing flap is made of elastic material, a first wall is provided on the side of the sealing flap close to the air outlet section, and a second wall is provided on the side of the sealing flap away from the air outlet section, the sealing flap is also provided with an abutment wall, the first wall is connected to the second wall via the abutment wall, the height of the connecting end of the first wall and the abutment wall is smaller than the height of the other end thereof, and the height of the connecting end of the second wall and the abutment wall is smaller than the height of the other end thereof; when the sealing flap is in a natural state, the abutment walls of the two sealing flaps abut against each other.

Preferably, the one-way valve comprises: an upper ring body, a lower ring body and a sealing member, the upper ring body being arranged in the return air section; the lower ring body being arranged in the return air section, a valve cavity being formed between the upper ring body and the lower ring body, the lower ring body being further provided with a through hole, one end of the through hole being connected to the air outlet section, and the other end of the through hole being connected to the valve cavity; the wall surface of the sealing member is suitable for fitting with the inner ring wall 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.

Preferably, the pressing head is also provided with a transition hole, the bottom end of the transition hole is connected to the mounting hole, and the top end of the transition hole is connected to the liquid outlet hole, and the nozzle also includes: a bubbler cylinder and a hole net, the bubbler cylinder is arranged in the transition hole; at least one end of the bubbler cylinder is provided with the hole net, and the return air section is connected to an end of the transition hole away from the mounting hole.

An application of the nozzle in extruding laundry detergent, wherein the components of the laundry detergent include, by weight: 11-15 parts of sodium 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-propylene glycol, 2.5-3.5 parts of sodium α-olefin sulfonate, 0.8-1.3 parts of glycerol, 0.08-0.12 parts of GLDA, and 65-70 parts of deionized water.

The main functions of sodium alcohol ether sulfate (AES) in laundry detergent include detergency, wetting, foaming and emulsification. AES is an anionic surfactant with excellent detergency, emulsification, foaming and hard water resistance, and is mild to the skin.

APG is a natural plant-based nonionic surfactant, mainly made from natural coconut oil and corn starch, with good biodegradability and no pollution to the environment. Its completely biodegradable properties enable it to be completely decomposed in nature, avoiding the environmental pollution problems that may be caused by traditional detergents.

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 the stain molecules. At the same time, it adsorbs on the surface of the stains, making them easier to be removed by detergents.

MES-A can improve the formula's washing power and resistance to hard water, reduce the amount of water softener used, reduce the deposition of inorganic salts in clothing, and make clothing softer.

Propylene glycol can enhance the emulsification, dispersion, stability and antifreeze properties of laundry detergent, and can also inhibit the growth of bacteria and mold, but propylene glycol will also increase the viscosity of the laundry detergent.

The main functions of sodium α-olefin sulfonate (AOS) in laundry detergent include improving detergency, improving foam performance and enhancing hard water resistance. AOS is a high-foaming, hydrolytically stable anionic surfactant with good hard water resistance, detergency, calcium dispersibility and emulsification properties.

Glycerol can dissolve other chemicals and help detergents and other laundry detergent ingredients mix evenly. It can also increase the wettability of detergents, making it easier to evenly distribute on the surface of clothing and improve the cleaning effect. Glycerol has a certain antibacterial and antiseptic effect. Similarly, glycerol will also increase the viscosity of laundry detergent.

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.

Since the present invention improves the nozzle, the applicant increases the amount of surfactant used in the laundry detergent formula that has been adopted, especially the amount of APG, which is an alkyl polyglycoside with a large number of hydrogen bonds. At low temperatures, the molecular thermal motion is weakened, making it easier for the hydrogen bonds between APG molecules to form and exist stably. These hydrogen bonds increase the interaction force between molecules, resulting in an increase in the internal friction of the solution, thereby increasing the viscosity. In addition, APG can form a micellar structure in water. At lower temperatures, such 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, micelles may aggregate more tightly to form larger aggregates, hindering the flow of the liquid and causing the viscosity to increase. In addition, the amount of 1,2-propylene glycol and glycerol is also increased to a certain extent.

The present invention has at least the following beneficial effects:

The liquid tank assembly and the partition in the nozzle provided by the present invention cooperate so that when the pressing head is pressed down to squeeze out the solution in the liquid tank assembly, the volume change of the upper cavity in the gas tank space per unit time increases significantly due to the movement of the partition, thereby increasing the flow rate of the gas entering the pores from the upper cavity, promoting the mixing between the gas flowing out of the pores and the solution flowing out of the liquid tank assembly, and at the same time, the proportion of the mixed gas will also increase, further improving the effect of foam generation.

After the nozzle is applied to laundry detergent extrusion, the extrusion effect of the laundry detergent at low temperature can be improved, thereby improving the selectivity of components, and the usable range of components whose dosage is controlled in the prior art to avoid excessive viscosity is increased.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

FIG1 is a first schematic diagram of a nozzle suitable for high viscosity solutions;

FIG2 is a second schematic diagram of the structure of a nozzle suitable for high viscosity solutions;

FIG3 is a first structural schematic diagram of the gas storage space;

FIG4 is a second structural schematic diagram of the gas storage space;

FIG5 is a schematic diagram of the structure of a driving assembly;

FIG6 is a detailed view of point A in FIG1 ;

FIG7 is a detail view of point A in FIG2 ;

FIG8 is a schematic diagram of another state of the one-way valve in FIG6;

FIG9 is a schematic diagram of the structure of the improved pressing head;

Figure markings: 1-connecting cover, 101-second elastic part, 2-pressing head, 21-liquid outlet, 22-air hole, 221-air outlet section, 222-air return section, 223-check 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 tank assembly, 31-upper connecting tube, 311-first Elastic part, 32-plunger, 33-closing cylinder, 34-moving cylinder, 35-elastic member, 4-tube body, 5-air chamber space, 51-upper cavity, 52-lower cavity, 6-partition, 7-lower connecting cylinder, 8-driving assembly, 81-first tooth component, 82-second tooth component, 83-gear, 9-sealing flap, 91-first wall, 92-second wall, 93-abutting wall, 10-bubbling cylinder, 11-pore mesh.

DETAILED DESCRIPTION

In order to make the purpose, method scheme and advantages of the embodiments of the present invention clearer, the method scheme in the embodiments of the present invention is clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

Embodiment 1: As shown in Fig. 1-Fig. 2, a nozzle suitable for high-viscosity solution comprises: a connection cover 1, a pressing head 2, a liquid storage component 3 and a partition 6, wherein the connection cover 1 is provided with a through hole 2234; the pressing head 2 is sleeved on the through hole 2234 and has the freedom of movement along the axial direction of the through hole 2234; the pressing head 2 is provided with a liquid outlet 21 and an air hole 22, one end of the air hole 22 is connected to the liquid outlet 21, and the other end of the air hole 22 is connected to the inner cavity of the connection cover 1; one end of the liquid storage component 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 connected to the liquid outlet hole 21, and the liquid inlet end of the liquid storage assembly 3 is connected to the tube body 4 configured with 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 6 is provided on the outer wall of the liquid storage assembly 3, and the partition 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 6 moves toward the direction close to the pressing head 2.

During the specific implementation process, the connecting cover 1 can be connected to the container containing the solution through an internal thread, 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 provided on the outer wall of the pressing head 2, and a slide groove is provided in the through hole 2234, and the sliding connection and the limitation of the sliding path are realized by the cooperation of the slider and the slide groove. The structure for sucking the solution into the liquid bin for storage and the structure for squeezing the solution out of the liquid bin in the liquid bin assembly 3 can refer to the prior art, and no improvement is required in this embodiment. In this embodiment, a partition 6 is added on the basis of the function of the existing liquid bin assembly 3, and the edge of the partition 6 can be provided with elastic materials such as rubber, so that the upper cavity 51 is isolated from the lower cavity 52. As shown in Figure 1, a lightweight sealing ball can be provided at the inlet end of the liquid outlet 21 with reference to the prior art. A bubbling net can be provided at the outlet end of the liquid outlet 21.

During operation, the pressing head 2 is pressed downward, so that the solution stored in the liquid tank flows from the liquid tank component 3 to the liquid outlet 21. At the same time, the upward movement of the partition 6 and the downward movement of the pressing head 2 will 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 21. Before the gas and solution enter the liquid outlet 21, the two first converge in the mixing chamber. After mixing, the sealing ball is pushed open to enter the liquid outlet 21 and realize the liquid discharge. After the liquid discharge is completed, the pressing head 2 is reset. At this time, the space for accommodating the solution in the liquid tank component 3 becomes larger, and the solution is sucked and enters the liquid tank from the tube body 4. A sealing ball can also be set at the top of the tube body 4. When the solution is sucked, the sealing ball is pushed open and the opening at the top of the tube body 4 is released. After the suction is completed, the sealing ball falls back to block the opening at the top of the tube body 4. When the pressing head 2 is reset, the partition 6 is reset downward, the volume of the upper cavity 51 increases, and the atmosphere enters the upper cavity 51 from the air hole 22.

In this embodiment, the liquid storage component 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 component 3, due to the movement of the partition 6, the volume change of the upper cavity 51 in the gas storage space 5 per unit time increases significantly, thereby increasing the flow rate of the gas entering the pores 22 from the upper cavity 51, promoting the mixing between the gas flowing out of the pores 22 and the solution flowing out of the liquid storage component 3, and at the same time, the volume proportion of the mixed gas will also increase, further improving the effect of foam generation.

Embodiment 2: In order to realize the installation and driving of the partition 6, improvements are made on the basis of embodiment 1, as shown in Figures 1 to 3, in this embodiment, the pressing head 2 is provided with a mounting hole 23, the mounting hole 23 is communicated with the air hole 22, the end of the connecting cover 1 away from the pressing head 2 is provided with a lower connecting tube 7, the liquid tank assembly 3 includes: an upper connecting tube 31, a plunger 32, a closing tube 33, a moving tube 34 and an elastic member 35, one end of the upper connecting tube 31 is installed in the mounting hole 23, and the other end of the upper connecting tube 31 extends to the inside of the connecting cover 1; one end of the plunger 32 is hung on the top opening of the upper connecting tube 31; the outer wall of the closing tube 33 is connected to the The inner wall of the lower connecting cylinder 7 is connected, and the other end of the plunger 32 is inserted into the closing cylinder 33, and the other end of the plunger 32 is used to block the top opening of the closing cylinder 33; one end of the moving cylinder 34 is connected to the upper connecting cylinder 31 through the driving assembly 8, and 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 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.

In the specific implementation process, the elastic member 35 can be a spring. The upper connecting tube 31 can be sleeved inside the mounting hole 23 and snap-fitted with the inner wall of the mounting hole 23. The top of the upper connecting tube 31 can be provided with a tapered hole as shown in FIG. 1, and 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 tube 33 can be connected to the inner wall of the lower connecting tube 7 through an annular connector as shown in FIG. 1. The bottom end of the plunger 32 can be set as a spherical shape as shown in FIG. 1, and an arc surface is set at the top opening of the closed tube 33, so that the spherical bottom end of the plunger 32 can block the opening of the closed tube 33.

The elastic member 35 is used to reset the pressing head 2 after it is pressed down. Therefore, there are at least two ways to set the elastic member 35:

As shown in Fig. 1, the elastic member 35 can be placed on the closed tube 33, the upper end of the elastic member 35 is connected or abutted with the end of the upper connecting tube 31, and the lower end of the elastic member 35 is connected or abutted with the closed tube 33. After the pressing head 2 is pressed downward, the resilience of the elastic member 35 directly acts on the upper connecting tube 31, driving the pressing head 2 to move upward through the upper connecting tube 31.

As shown in Fig. 3, an elastic member 35 is provided according to the technical solution in this embodiment. When the pressing head 2 finishes pressing down, the elastic member 35 retracts, driving the moving cylinder 34 to move down, and then the moving cylinder 34 drives the upper connecting cylinder 31 to move up.

Of course, the elastic member 35 can also be arranged at both of the above two positions. The purpose of selecting the arrangement shown in FIG. 3 in this embodiment is that the elastic member 35 is generally made of metal, and the liquid tank assembly 3 is a storage space for the solution. If the elastic member 35 is arranged inside the liquid tank assembly 3, it is in direct contact with the solution, which may affect the performance or efficacy of the solution.

When the pressing head 2 is pressed down, the upper connecting cylinder 31 moves down, and the plunger 32 also moves down, the top of the closing cylinder 33 is opened, and the solution moves up under pressure and pushes against the top of the plunger 32, and flows out from the gap between the plunger 32 and the upper connecting cylinder 31. When the upper connecting cylinder 31 moves down, the driving assembly 8 drives the moving cylinder 34 to move up, and then the moving cylinder 34 drives the partition 6 to move up.

After the pressure applied to the pressing head 2 is released, the upper connecting tube 31 moves upward under the action of the rebound force of the elastic member 35, and the solution is sucked into the liquid tank assembly 3, and the spherical bottom end of the plunger 32 blocks the top opening of the closing tube 33. In the process of the upper connecting tube 31 moving upward, the partition 6 is driven to move downward, the upper cavity 51 becomes larger, the pressure decreases, and the outside air enters the upper cavity 51 from the air hole 22.

Embodiment 3: In order to simply realize the reverse movement of the partition 6 and the pressing head 2, improvements are made on the basis of Embodiment 2, as shown in Figures 3 to 5. In this embodiment, the driving assembly 8 includes: a first tooth component 81, a second tooth component 82 and a gear 83. The outer wall of the upper connecting cylinder 31 is provided with the first tooth component 81; the inner wall of the moving cylinder 34 is provided with the second tooth component 82; 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 transmission-connected to the gear 83.

During 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 mounted on the end of the lower connecting cylinder 7 through a frame. The structure of the first tooth component 81 and the second tooth component 82 can be a rack shape. The upper connecting cylinder 31, the moving cylinder 34 and the lower connecting cylinder 7 can adopt a cylinder with a square cross-section, and the first tooth component 81 and the second tooth component 82 can be set 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.

Example 4: In order to further improve the applicability of the nozzle for high-viscosity solutions, improvements are made on the basis of Examples 1-3. As shown in Figure 1, in this embodiment, the side wall of the upper connecting tube 31 is provided with a first elastic portion 311, and the first elastic portion 311 is located above the lower connecting tube 7; when the partition 6 moves toward the pressing head 2, V1≥7.5V2; wherein V1 represents the volume reduction of the upper cavity 51 caused by the movement of the partition 6, and V2 represents the volume increase of the upper cavity 51 caused by the deformation of the first elastic portion 311.

In the specific implementation process, a plurality of first elastic parts 311 can be arranged around the circumference of the upper connecting tube 31. The first elastic part 311 can be made of materials such as rubber or silicone. The first elastic part 311 can be set to be circular. In this embodiment, by setting the first elastic part 311, 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 high-viscosity solution in the liquid tank.

When the pressing head 2 is pressed down, the partition 6 moves up, the pressure inside the upper cavity 51 increases, and the first elastic part 311 bulges into the upper connecting tube 31. Although the flow rate of the gas in the upper cavity 51 will be reduced to a certain extent, the high-viscosity solution can be made to flow more easily through the extrusion of the first elastic part 311, and then under the same downward pressure, the high-viscosity solution can be easily driven to flow out of the liquid tank assembly 3. In this embodiment, the movement of the partition 6 can not only increase the outflow speed and outflow amount of the airflow in the upper cavity 51, but also increase the outflow speed of the solution in the liquid tank assembly 3, further increasing the gas-liquid mixing degree. When the pressing head 2 is reset, the deformation of the first elastic part 311 can also promote the high-viscosity solution to enter the liquid tank.

Since the proportion of V2 in V1 will affect the distribution of the promoting effect on the gas and liquid when the partition 6 moves, the proportional relationship between the two will affect the foaming effect after the gas and liquid are mixed.

Embodiment 5: In order to make pressing down more labor-saving, an improvement is made on the basis of Embodiment 4. As shown in FIG. 4 , in this embodiment, a second elastic portion 101 is provided at the bottom end of the connection cover 1 .

In the specific implementation process, the bottom end of the connection cover 1 in FIG3 can be in an open state, thereby avoiding the influence of the pressure change of 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, so whether the bottom end of the connection cover 1 is open can be selected according to needs. In addition, if the bottom end of the connection cover 1 is made of a hard material as a whole, in order to avoid the slight negative pressure in the solution container, an air intake channel can be set at the top of the gap between the connection part of the connection cover 1 and the container mouth and the outer wall of the lower cavity 52, one end of the air intake channel is connected to the atmosphere, and the other end of the air intake channel is connected to the solution container, and a one-way valve 223 can be set in the air intake channel.

The present embodiment provides an improved method for closing the bottom end of the connecting cover 1, in which a second elastic member 35 is added to the bottom end thereof, and the second elastic portion 101 can be set as an arc-shaped surface as shown in FIG. 4. The second elastic member 35 can be made of rubber or silicone. Since the second elastic member 35 will be placed in a container containing the solution, it is necessary to note that the height of the solution should not be too high to avoid direct contact between the solution and the second elastic member 35. When the partition 6 moves up and down, the second elastic member 35 can be deformed accordingly, thereby reducing the force required for the partition 6 to move up. In addition, the second elastic member 35 can be deformed to adapt to the change in the internal pressure of the solution container, thereby avoiding or reducing deformation of the container, and can be suitable for the use of small-volume containers, such as travel-sized laundry detergent containers.

Embodiment 6: In order to allow outside air to enter the upper cavity 51, improvements are made on the basis of Embodiment 4, as shown in Figures 1 and 2. In this embodiment, the air hole 22 includes: an air outlet section 221, an air return section 222 and a one-way valve 223. One end of the air outlet section 221 is connected to the inner cavity of the connecting cover 1, and the other end of the air outlet section 221 is connected to the liquid outlet 21; one end of the air return section 222 is connected to the air outlet section 221, and the other end of the air return section 222 passes through the connecting cover 1; 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.

During the specific implementation process, multiple gas outlet sections 221 can be provided, and multiple gas outlet sections 221 are arranged around the mounting hole 23. The return gas section 222 can be connected to one or some of the gas outlet sections 221, and the gas outlet section 221 can also be annular as a whole. The use of multiple independent gas outlet sections 221 can increase the speed of gas outflow in the gas outlet section 221, thereby increasing the degree of gas-liquid mixing and improving the foaming effect. When the partition 6 moves up, the one-way valve 223 is closed, and the gas flows from the gas outlet section 221 to the gas-liquid mixing chamber, mixes with the solution, and enters the liquid outlet hole 21. When the partition 6 moves down, the internal pressure of the upper cavity 51 decreases, and the outside air enters the upper cavity 51 through the one-way valve 223.

The connection end of the air return section 222 with the atmosphere can be arranged at the top of the pressing head 2 as shown in FIG1 , or can be arranged at the side of the pressing head 2 as shown in FIG2 . If the structure of the air return section 222 shown in FIG1 is adopted, when the pressing head 2 is continuously pressed by the palm, the palm is easy to cover the inlet end of the air return section 222, which will affect the air return during the continuous pressing process, so the air return section 222 can adopt the structure shown in FIG2 .

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

During the specific implementation process, the sealing flap 9 can be made of rubber or silicone material. The connection method between the sealing flap 9 and the return air section 222 is not limited in this embodiment. As shown in Figure 6, a mounting ring can be set in the return air section 222, and the sealing flap 9 is penetrated by the mounting ring and connected to the mounting ring. The mounting ring can provide support for the sealing flap 9. The first wall surface 91 can adopt an arc surface as shown in Figure 6. When the liquid is discharged, the gas in the air outlet section 221 squeezes 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 then the two abutting walls 93 are more closely fitted, and the gas only flows to the gas-liquid mixing chamber at the top outlet of the liquid tank assembly 3. The abutting wall 93 can adopt a longitudinal plane wall. The second wall surface 92 can adopt a sloped wall or a semi-conical wall as shown in Figure 6. When the partition 6 moves downward, the volume of the upper cavity 51 increases and the internal pressure decreases, the second wall 92 drives the abutting walls 93 of the two sealing petals 9 away from each other under the action of the external atmospheric pressure, and the external atmosphere enters the upper cavity 51 to realize the return of air to the air chamber.

The one-way valve 223 structure adopted in this embodiment is not directly applied to the liquid outlet 21 or the tube body 4 to replace the sealing ball. The main reason is that the one-way valve 223 structure in this embodiment is generally made of elastic materials such as rubber, which is not easy to directly contact certain solutions. The sealing flap 9 may react with one or some components in the solution, which not only affects the properties of the solution, but also affects the sealing effect of the sealing flap 9.

Embodiment 8: This embodiment provides another one-way valve 223 structure, as shown in FIGS. 7-8, the one-way valve 223 comprises: an upper ring body 2231, a lower ring body 2232 and a sealing member 2235, wherein the upper ring body 2231 is disposed in the air return section 222; the lower ring body 2232 is disposed in the air return section 222, a valve cavity 2233 is formed between the upper ring body 2231 and the lower ring body 2232, and the lower ring body 223 2 is also provided with a through hole 2234, one end of which is connected to the air outlet section 221, and the other end of which is connected to the valve cavity 2233; the wall surface of the sealing member 2235 is suitable for fitting with the inner ring walls of the upper ring body 2231 and the lower ring body 2232; when the sealing member 2235 fits with the upper ring body 2231 or the lower ring body 2232, there is a gap between the sealing member 2235 and the other ring body.

During the specific implementation process, when the seal 2235 is in contact with the upper ring body 2231, the other ring body is the lower ring body 2232, and vice versa, the other ring body is the upper ring body 2231. The seal 2235 can adopt a lightweight sealing ball as shown in Figure 7, and the upper ring body 2231 and the lower ring body 2232 are provided with an arc inner ring wall that cooperates with the sealing ball. The shape and specific setting position of the through hole 2234 are not limited in this embodiment. As shown in Figure 7, the through hole 2234 is set as a cylindrical hole body, and can also be set as an annular hole body, and 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 up, the internal pressure of the upper cavity 51 increases, and the seal 2235 moves up to fit with the upper ring body 2231, thereby realizing the isolation of the return air section 222 and the outlet air section 221. When the partition 6 moves downward, the internal pressure of 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 return air section 222 is connected with the outlet air section 221 through the valve cavity 2233 and the through hole 2234, thereby realizing the return air of the upper cavity 51.

Example 9: In order to further increase the applicability of the nozzle in high-viscosity solutions, improvements were made on the basis of Example 6. As shown in Figure 9, in this embodiment, the pressing head 2 is also provided with a transition hole 24, the bottom end of the transition hole 24 is connected to the mounting hole 23, and the top end of the transition hole 24 is connected to the liquid outlet hole 21. The nozzle also includes: a bubbler tube 10 and a hole mesh 11, the bubbler tube 10 is arranged in the transition hole 24; at least one end of the bubbler tube 10 is provided with the hole mesh 11, and the return air section 222 is connected to the end of the transition hole 24 away from the mounting hole 23.

During the specific implementation process, the one-way valve 223 can adopt the structure shown in Figure 7 or Figure 8. In order to make the nozzle suitable for scenes with higher requirements for foaming effect, this embodiment adds a mesh 11 to the nozzle outlet path, and improves the gas-liquid mixing degree and foam fineness through the small holes of the mesh 11. The foaming cylinder 10 is used to connect the mesh 11 and provide a channel for the gas-liquid mixture. As shown in Figure 9, the mesh 11 is set at both the upper and lower ends of the foaming cylinder 10, and the aperture of the lower mesh 11 can be larger than the aperture of the upper mesh 11. When the pressing head 2 is squeezed, the gas flows out from the gas outlet section 221, and the solution flows out from the liquid tank component 3 simultaneously, and the liquid and gas are initially mixed and foamed, and then the gas-liquid mixture flows upward and passes through the lower mesh 11 to achieve secondary mixing and foaming, and finally passes through the upper mesh 11 to achieve tertiary mixing and foaming. When the temperature drops, the residual solution at the mesh 11 may increase its viscosity sharply due to the temperature and the small volume of the residual solution, resulting in a certain degree of blockage in the mesh 11. In addition, if there are certain solid functional substances in the solution, such as solid silica in some laundry detergents, the possibility of clogging of the mesh 11 may also increase. Therefore, this embodiment also utilizes the effect of gas during air return to ensure that there is as little solution and solid particles as possible in the mesh 11.

In this embodiment, the air return 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. When returning air, the outside air passes through the air return section 222, the upper hole mesh 11, the lower hole mesh 11 and the air outlet section 221 in sequence, and finally enters the upper cavity 51. In the process of returning air, the high-viscosity solution or solid particles remaining in the hole mesh 11 can be dropped by the air flow, which can reduce the possibility of the hole mesh 11 being blocked due to the sudden drop in temperature before the next use, and the viscosity of the remaining small volume of solution increases again.

Example 10: This example provides an application of the nozzle in laundry detergent extrusion. The components of the laundry detergent include, by weight: 11-15 parts of sodium 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-propylene glycol, 2.5-3.5 parts of sodium α-olefin sulfonate, 0.8-1.3 parts of glycerol, 0.08-0.12 parts of GLDA, and 65-70 parts of deionized water.

In the specific implementation process, the performance requirements of hand-washing laundry detergent are different from those of machine-washing laundry detergent due to the different applicable objects and usage processes. Hand-washing laundry detergent is relatively mild because it will contact the skin. In addition, the stains on clothes that need to be hand-washed may be more stubborn, so the requirements for decontamination ability will be relatively higher. In addition, in order to speed up the penetration of surfactants into clothing fibers during the hand-washing process, the applicant expects that the hand-washing laundry detergent can directly foam when it is discharged.

When adjusting the formula of hand-washing laundry detergent, the applicant found that when the laundry detergent under the optimal washing effect parameters uses the existing nozzle, the foaming effect in winter is significantly reduced, and blockage may occur. After investigation, it was found that when the temperature is low in winter, the viscosity of the laundry detergent under the formula of this embodiment increases significantly, and the use of the foaming nozzle is limited. The user may need to replace it with an ordinary liquid discharge nozzle to better use the laundry detergent. Therefore, the applicant made relevant improvements to the nozzle structure, and at the same time expects that the nozzle used in the present invention is not only suitable for laundry detergent, but also can be used in other high-viscosity solution scenarios.

Test: The nozzle provided in this case was used to conduct an extrusion test of laundry detergent to observe the performance of the foam. During the test, the temperature of the laundry detergent was -10°C. Each group of tests was tested five times and the average was taken. The test results are shown in Table 1.

The laundry detergent adopts the best cleaning ratio. In terms of weight, the laundry detergent includes 11 parts of sodium fatty alcohol ether sulfate, 5 parts of APG, 4 parts of AEO-9, 5 parts of MES-A, 5 parts of 1,2-propylene glycol, 3 parts of sodium α-olefin sulfonate, 1.2 parts of glycerol, 0.1 parts of GLDA, and 65 parts of deionized water.

The nozzle structures are respectively based on the following test examples and comparative examples, and the pumping volume of the liquid tank is based on 4 ml.

Test Example 1: A nozzle suitable for high-viscosity solutions, comprising: a connecting cover, a pressing head, a liquid tank assembly and a partition, the connecting cover is provided with a through hole; the pressing head is sleeved on the through hole and has 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 connected to the liquid outlet hole, and the other section of the air hole is connected to the inner cavity of the connecting cover; one end of the liquid tank assembly is connected to the pressing head, and the other end of the liquid tank assembly is connected to the connecting cover, the liquid outlet end of the liquid tank assembly is connected to the liquid outlet hole, and the liquid inlet end of the liquid tank assembly is connected to the tube body configured with the connecting cover; an air tank space is left between the outer wall of the liquid tank assembly and the inner wall of the connecting cover; the outer wall of the liquid tank assembly is provided with a partition, and the partition divides the air tank space into an upper cavity and a lower cavity; when the pressing head is pressed down, the nozzle discharges liquid and the partition moves in a direction close to the pressing head. The pressing head is provided with a mounting hole, which is communicated with the air hole, and the connecting cover is provided with a lower connecting cylinder at one end away from the pressing head. The liquid tank assembly comprises: an upper connecting cylinder, a plunger, a closing 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 to the inside of the connecting cover; one end of the plunger is hung on the top opening of the upper connecting cylinder; the outer wall of the closing cylinder is connected to the inner wall of the lower connecting cylinder, and the other end of the plunger is penetrated through the closing cylinder, and the other end of the plunger is used to block the top opening of the closing 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, 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 with the bottom end of the moving cylinder, and the other end of the elastic member is connected or abutted with the inner wall of the connecting cover. The driving assembly includes: a first tooth component, a second tooth component and a gear. The outer wall of the upper connecting cylinder is provided with the first tooth component; the inner wall of the moving cylinder is provided with the second tooth component; the gear is installed at the end of the lower connecting cylinder, and the first tooth component and the second tooth component are respectively provided on both sides of the gear and are connected to the gear. 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 moves toward the direction of the pressing head, V ₁ =7.5V ₂ ; wherein V ₁ represents the volume reduction of the upper cavity caused by the movement of the partition, and V ₂ represents the volume increase of the upper cavity caused by the deformation of the first elastic part. The bottom end of the connecting cover is provided with a second elastic part. The one-way valve includes: two sealing flaps, the two sealing flaps are symmetrically arranged in the air return section, the sealing flap is made of elastic material, the sealing flap is provided with a first wall surface on the side close to the air outlet section, and the sealing flap is provided with a second wall surface on the side away from the air outlet section, and 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 the height of the other end thereof, and the height of the connecting end of the second wall surface and the abutting wall is less than the height of the other end thereof; when the sealing flap is in a 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 connected to the mounting hole, and the top end of the transition hole is connected to the liquid outlet hole, and the nozzle also includes: a bubbler and a hole net, the bubbler is provided in the transition hole; at least one end of the bubbler is provided with the hole net, and the air return section is connected to the end of the transition hole away from the mounting hole.

Experimental Example 2: The difference from Experimental Example 1 is that: V ₁ =8.5V ₂ .

Test Example 3: The difference from Test Example 1 is that: V ₁ =10V ₂ .

Comparative Example 1: The difference from Experimental Example 2 is that: V ₁ =7V ₂ .

Comparative Example 2: The difference from Experimental Example 2 is that the upper connecting tube is not provided with the first elastic portion.

Blank example: Use existing nozzle.

Table 1

Test Example 1 Test Example 2 Test Example 3 Comparative Example 1 Comparative Example 2 Blank example Foaming multiple 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

The half-life refers to the time required for the volume of the foam to decrease to half of its initial volume, measured in minutes.

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 effect of using the nozzle provided by Test Example 2 is better.

From the comparison between comparative example 1 and test example 2, it can be seen that the ratio of V1 to V2 affects the gas-liquid ratio and the gas-liquid flow rate, and thus affects the final foam properties. When V1≥7.5V2, the influence of the ratio on the foam properties increases significantly.

From the comparison between Comparative Example 2 and Test Example 2, it can be seen that the provision of the first elastic portion can improve the fineness and stability of the foam.

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

Claims (9)

1. A nozzle suitable for high viscosity solution, characterized by comprising: A connecting cover (1), wherein the connecting cover (1) is provided with a through hole (2234); A pressing head (2), the pressing head (2) being sleeved on 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) being provided with a liquid outlet hole (21) and an air hole (22), one end of the air hole (22) being in communication with the liquid outlet hole (21), and the other end of the air hole (22) being in communication with the inner cavity of the connecting cover (1); A liquid bin assembly (3), one end of the liquid bin assembly (3) is connected to the pressing head (2), the other end of the liquid bin assembly (3) is connected to the connecting cover (1), the liquid outlet end of the liquid bin assembly (3) is connected to the liquid outlet hole (21), and the liquid inlet end of the liquid bin assembly (3) is connected to a tube body (4) configured for the connecting cover (1); an air bin space (5) is reserved between the outer wall of the liquid bin assembly (3) and the inner wall of the connecting cover (1); A partition (6), wherein the outer wall of the liquid bin assembly (3) is provided with a partition (6), and the partition (6) divides the gas bin space (5) into an upper cavity (51) and a lower cavity (52); When the pressing head (2) is pressed downward, the nozzle discharges liquid and the partition (6) moves in a direction close to the pressing head (2); The pressing head (2) is provided with a mounting hole (23), the end of the connecting cover (1) away from the pressing head (2) is provided with a lower connecting tube (7), and the liquid tank assembly (3) comprises: An upper connecting tube (31), one end of the upper connecting tube (31) being mounted on the mounting hole (23), and the other end of the upper connecting tube (31) extending into the interior of the connecting cover (1); A moving cylinder (34), one end of the moving cylinder (34) is connected to the upper connecting cylinder (31) via 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 (6); The driving assembly (8) comprises: A first tooth component (81), the outer wall of the upper connecting tube (31) is provided with the first tooth component (81); A second tooth component (82), the inner wall of the moving cylinder (34) is provided with the second tooth component (82); A gear (83), wherein the first tooth component (81) and the second tooth component (82) are respectively arranged on two sides of the gear (83) and are transmission-connected to the gear (83). 2. The nozzle suitable for high-viscosity solution according to claim 1, characterized in that the liquid storage component (3) further comprises: A plunger (32), one end of which is hung on the top opening of the upper connecting tube (31); A closing cylinder (33), the outer wall of which is connected to the inner wall of the lower connecting cylinder (7), the other end of the plunger (32) passing through the closing cylinder (33), and the other end of the plunger (32) used to block the top opening of the closing cylinder (33); An elastic member (35), wherein the elastic member (35) is sleeved on the lower connecting tube (7), one end of the elastic member (35) is connected to or abuts against the bottom end of the moving tube (34), and the other end of the elastic member (35) is connected to or abuts against the inner wall of the connecting cover (1). 3. The nozzle suitable for high-viscosity solutions according to claim 2 is characterized in that the gear (83) is installed at the end of the lower connecting tube (7); the mounting hole (23) is connected to the air hole (22); and the moving direction of the moving tube (34) is opposite to that of the upper connecting tube (31). 4. The nozzle suitable for high-viscosity solution according to any one of claims 1 to 3, characterized in that a first elastic portion (311) is provided on the side wall of the upper connecting tube (31), and the first elastic portion (311) is located above the lower connecting tube (7); When the partition (6) moves toward the pressing head (2), V1≥7.5V2; wherein V1 represents the volume reduction of the upper cavity (51) caused by the movement of the partition (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 suitable for high-viscosity solutions according to claim 4, characterized in that a second elastic portion (101) is provided at the bottom end of the connecting cover (1). 6. The nozzle suitable for high viscosity solution according to claim 4, characterized in that the air hole (22) comprises: An air outlet section (221), one end of the air outlet section (221) being in communication with the inner cavity of the connecting cover (1), and the other end of the air outlet section (221) being in communication with the liquid outlet hole (21); An air return section (222), one end of the air return section (222) being connected to the air outlet section (221), and the other end of the air return section (222) passing through the connection cover (1); A one-way valve (223), wherein the one-way valve (223) is disposed in the air return section (222), and air can pass through the one-way valve (223) and enter the upper cavity (51). 7. The nozzle suitable for high viscosity solution according to claim 6, characterized in that the one-way valve (223) comprises: Two sealing flaps (9), the two sealing flaps (9) are symmetrically arranged in the air return section (222), the sealing flap (9) is made of elastic material, a first wall surface (91) is provided on the side of the sealing flap (9) close to the air outlet section (221), and a second wall surface (92) is provided on the side of the sealing flap (9) away 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 smaller 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 smaller than the height of the other end thereof; When the sealing flaps (9) are in a natural state, the abutting walls (93) of the two sealing flaps (9) abut against each other. 8. The nozzle suitable for high viscosity solution according to claim 6, characterized in that the one-way valve (223) comprises: An upper ring body (2231), wherein the upper ring body (2231) is disposed in the air return section (222); A lower ring body (2232), wherein the lower ring body (2232) is arranged in the air return section (222), a valve cavity (2233) is formed between the upper ring body (2231) and the lower ring body (2232), and the lower ring body (2232) is further provided with a through hole (2234), one end of the through hole (2234) is connected to the air outlet section (221), and the other end of the through hole (2234) is connected to the valve cavity (2233); A sealing member (2235), wherein the wall surface of the sealing member (2235) is suitable for fitting with the inner ring walls of the upper ring body (2231) and the lower ring body (2232); when the sealing member (2235) fits with the upper ring body (2231) or the lower ring body (2232), a gap exists between the sealing member (2235) and the other ring body. 9. The nozzle suitable for high-viscosity solution 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) is connected to the mounting hole (23), and the top end of the transition hole (24) is connected to the liquid outlet hole (21), and the nozzle further comprises: A foaming tube (10), wherein the foaming tube (10) is arranged in the transition hole (24); A mesh (11), wherein at least one end of the foaming tube (10) is provided with the mesh (11), and the air return section (222) is connected to an end of the transition hole (24) away from the mounting hole (23).