A nebulizer

Abstract

The utility model provides a kind of sprayer, with for spraying liquid nozzle part and for liquid from the nozzle part accelerated ejection pre-compression structure;The pre-compression structure includes valve seat and valve, and the valve includes sealing portion;The sealing portion separates the pre-compression chamber into relatively independent upper chamber and lower chamber, correspondingly, the valve seat is provided with the acting portion compatible with the sealing portion, the acting portion is housed in the upper chamber and can prevent the sealing portion continue to flex or move, and make the liquid flow path through the lower chamber be limited. The pre-compression chamber is divided into two by the sealing portion of valve, and is separated into relatively independent upper chamber and lower chamber, allows pressure to be accumulated in smaller cavity lower chamber before being ejected from nozzle part, can force sealing portion to displace in shorter time and accelerate liquid to be ejected, to better obtain the desired faster ejection effect.

Description

Technical Field

[0001] This utility model relates to the field of sprayer technology, and in particular to a pump sprayer that is manually operated by a trigger lever. Background Technology

[0002] A sprayer is a miniature sprayer that utilizes the movement of a piston within a pump body to cause gas flow within the pump body, reducing the pressure while maintaining a constant pressure outside the pump body. This pressure difference creates a pressure gradient, guiding the liquid out of the pump body. When the liquid encounters the high-speed airflow, it is instantly atomized. Examples include the "Spray Gun Body" disclosed in Chinese Patent ZL201620317419.6 or the liquid sprayer disclosed in European Patent EP1585602. These spray guns / sprayers utilize a user-operated trigger rod and a pump actuated by the trigger rod to draw liquid from a container through a clamp tube, ultimately spraying the liquid through a delivery nozzle. The valve for fluid suction and delivery is located inside the pump chamber or upstream of the pump chamber, allowing selective and unidirectional suction of fluid from the container into the pump chamber and delivery of fluid from the pump chamber towards the delivery nozzle.

[0003] However, since sprayers are commonly used for purposes such as household hygiene, room deodorization, or pre-ironing fabric treatment, it is usually necessary to accelerate the discharge of liquid from the sprayer, or to ensure that the liquid is sprayed in one or more specific desired configurations (mist, stream, etc.). In addition to increasing the actuation speed of the trigger lever, it is also necessary to increase the liquid delivery pressure. Therefore, existing sprayers often employ a "pre-compression" arrangement, so that the fluid can be forcefully and completely distributed after the initial priming when the trigger lever is first actuated, i.e., after the initial use of the aforementioned pump. An example of this pre-compression valve system is found in European patent application EP97105012, "Sprayer Device with Pre-compression Pump, Manually Distributed by Trigger Lever". The operation is described and shown, which relies on the elastic restoring force generated by the metal spring. Although it can generate a certain pre-pressure effect, there have been many suggestions over the years to avoid the use of metal in pumps. For this reason, a "sprayer" with patent application number 202180087630.5 uses a valve with a secondary valve piston and an elastically deformable dome-shaped dome spring as a secondary valve (also called an "outlet valve"). When the wrench is turned to the end and the pressurized state of the cylinder space is released by the spraying of liquid (or air in the initial state), the secondary valve pushes down the secondary valve piston by the restoring force of the dome spring, closing the flow path and preventing droplets from being generated from the nozzle after the liquid is sprayed out.

[0004] While it can generate a certain pre-pressure to reduce the force required to pull the wrench, it still has the following drawbacks: First, because the secondary valve piston (including the inner skirt) is directly pressurized by the liquid stored in the cylinder to a certain threshold and then pushed upward to open the flow path, the inner skirt is relatively long in the vertical direction, and the compression and return space of the dome spring needs to be set. As a result, the secondary valve itself has a relatively long vertical length in the auxiliary cylinder. The liquid stored in the cylinder can quickly open the flow path after being pressurized to a smaller threshold, but the time for the inner skirt to return downward to close the flow path using the dome spring is relatively longer. This can easily cause the nozzle to still have the risk of leakage. On the other hand, the secondary valve piston only acts as a piston for opening and closing, and the pre-compression force it generates is small, which makes the actuating force required by the wrench greater. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a sprayer that can generate a greater speed of liquid discharge with a smaller actuation force, in view of the above-mentioned existing technology.

[0006] The technical solution adopted by this utility model to solve the technical problem is as follows: the sprayer has a spray gun body that can be used to draw in and spray out liquid in a container. The spray gun body includes a nozzle for spraying out liquid and a pre-compression structure for accelerating the spraying of liquid from the nozzle.

[0007] Its features are:

[0008] The pre-compression structure includes a valve seat and a valve, wherein the valve seat and the spray gun body are engaged to hold the valve in the proper position, i.e., upstream of the nozzle section;

[0009] The outer periphery of the valve abuts against the spray gun body and / or valve seat and forms a pre-compression chamber. The valve includes a sealing part, which can force the sealing part to be displaced to open the water outlet channel communicating with the nozzle when the liquid generates sufficient fluid pressure in the lower chamber.

[0010] The sealing part divides the pre-compression chamber into a relatively independent upper chamber and a lower chamber. Correspondingly, the valve seat is provided with an action part adapted to the sealing part. The action part is housed in the upper chamber and can prevent the sealing part from continuing to flex or move, and limit the liquid flow path through the lower chamber.

[0011] To ensure the pre-compression structure achieves the desired "pre-pressure storage" effect, the ratio of the lower chamber to the cylinder section's chamber size is preferably between 1:4 and 1:6. The cylinder section is fluidly connected to the container's inlet pipe and is used to store liquid. It should be noted that the lower chamber is crucial for allowing pressure accumulation or pre-compression of the fluid, such as liquid or air. The higher the pre-pressure required by the sprayer, the smaller the ratio of its chamber size needs to be. If the ratio is too large, it can easily cause problems with liquid loading onto the spray gun body. Therefore, a ratio between 1:4 and 1:6 is preferred.

[0012] Furthermore, the vertical height H of the sealing part from the spray gun body is between 1 mm and 1.4 mm. This vertical height H directly determines the size of the lower chamber. As mentioned earlier, the limitation of this vertical height H is a decisive factor in allowing pressure accumulation or pre-compression of fluids such as liquids or air. The valve as a whole can be made of elastomer, flexible material, plastic, polyurethane, silicone, etc. It utilizes the sealing part's ability to flex, move, or deform when a certain amount of force is applied. The material can be selected according to the required discharge force. Since the sealing part is only pulled back to its initial position using its own elastic properties or characteristics, the "fast opening, slow closing" problem in the prior art is avoided, achieving a "fast opening, fast closing" effect. With the sealing part's vertical height H from the spray gun body between 1 mm and 1.4 mm, the ratio of the lower chamber to the cylinder chamber size can be between 1:4 and 1:6.

[0013] To further generate the expected "pre-compression and energy storage" effect, preferably, an inner periphery is also provided at intervals within the outer periphery of the valve. The inner periphery is thicker than the outer periphery and abuts against the spray gun body. The inner periphery divides the internal space of the lower chamber into a first chamber and a second chamber from the center to the outside. A water passage is provided at the bottom of the inner periphery. After the liquid flows into the first chamber, it flows through the water passage to the second chamber, and the outer periphery is kept in a sealed state by means of the liquid surface tension. It should be noted that, in order to further increase the pre-pressure of the lower chamber, the applicant further reduces the size of the chamber by means of the inner periphery. In addition to its "dividing" function, the inner periphery is required to be thicker than the outer periphery wall, which can also further play a role in pressure storage. At the same time, the water passage is provided at its bottom, which allows the liquid to flow through the water passage to the second chamber, and the surface tension of the liquid can be used to keep the outer periphery in a sealed state, increasing the reliability of the pre-compression structure.

[0014] Furthermore, the spray gun body also includes:

[0015] A piston is reciprocally disposed at the outer end of the cylinder section and is used to form a sealed inner cavity in the cylinder section.

[0016] A wrench, located on one side of the piston, is used to push the piston toward the cylinder from front to back;

[0017] as well as

[0018] The pre-compression structure is located on the water outlet channel between the cylinder section and the nozzle section. When the liquid generates sufficient fluid pressure in the lower chamber, it can force the sealing part to be displaced to open the water outlet channel connecting to the nozzle section.

[0019] With the cylinder section filled with liquid, rotating the wrench moves the piston backward, pressurizing the liquid in the cylinder section and causing it to be ejected from the nozzle section. Conversely, rotating the wrench to reset moves the piston forward, creating negative pressure in the cylinder section, thereby filling the cylinder section with liquid from the container. The pre-compression structure provided on the water outlet channel allows pressure to accumulate before the liquid is ejected from the nozzle section, so that sufficient force can be applied to the liquid to generate the desired spray pattern during dispensing or to achieve finer liquid particles.

[0020] Furthermore, the water outlet channel between the cylinder section and the nozzle section includes a first flow path connecting the cylinder section and the lower chamber, and a second flow path connecting the lower chamber and the nozzle section. The first flow path is located outside the second flow path, and the outlet of the first flow path is lower than the inlet of the second flow path, so that after the liquid flows through the first flow path to the pre-compression chamber, it forms at least a partially inverted flow path before entering the inlet of the second flow path.

[0021] The applicant also needs to emphasize the special design of the water outlet channel, which is divided into a "nested" first flow path and a second flow path. Unlike the inverted "L" shape of the water outlet channel between the cylinder and the nozzle in the existing patent, the liquid in this application is pressurized by rotating the wrench, causing the piston to move backward. This pressurizes the liquid in the cylinder and causes the liquid to enter the first flow path located on the periphery. This allows the pressure to be accumulated in the lower chamber before being ejected from the nozzle. When the pressure accumulates to a preset threshold, it can force the sealing part to shift and accelerate the ejection of the liquid. In order for the sealing part to be pulled back to its initial position using its own elastic properties or features, a specific height difference must be maintained between the sealing part and the outlet of the first flow path where the liquid enters the lower chamber, thereby achieving the effect of "quick opening and quick closing".

[0022] To facilitate the installation of the pre-compression structure and for ease of implementation, it is preferable that the pre-compression structure is located at the top of the spray gun body. The top of the spray gun body has an upwardly extending upper circumference, while the valve seat is a downward-opening cylindrical shape. The valve seat and the upper circumference are aligned and sealed together. The second flow path is formed by a vertical tube perpendicular to the cylinder section. The spray gun body has a circumferential wall around the vertical tube, which together form a flow path. The circumferential wall has at least a partial platform for valve installation. While the outer periphery of the valve is sealed to the upper circumference, the sealing part is held at the top edge of the vertical tube. Alternatively, the pre-compression structure can be directly located at the rear end of the cylinder section.

[0023] Furthermore, the sealing portion has a preset thickness Th, where 0.4mm ≤ Th ≤ 0.9mm, and is either horizontally perpendicular to the vertical pipe body or an arc shape with the opening facing upwards. The preset thickness of the sealing portion is determined based on the required resistance or minimum opening pressure for the sealing portion to be displaced to open the water outlet channel. Thicker and thinner portions may be included as needed. In addition, this preset thickness can, to some extent, help generate sufficient fluid pressure in the lower chamber.

[0024] To facilitate machining of the valve seat's actuating portion and for structural simplicity, the actuating portion of the valve seat is preferably a downwardly protruding post parallel to the axial direction of the vertical pipe body. The lower end face of this post contacts the sealing portion during operation, preventing further deflection or movement of the sealing portion and fixing the fluid flow passage through the lower chamber. When the pressure applied to the valve decreases, the valve sealing portion can return to its unacted position, thereby preventing liquid flow through the valve.

[0025] Compared with the prior art, the advantages of this utility model are:

[0026] 1. The pre-compression chamber is divided into two relatively independent upper and lower chambers by the valve's sealing part. This allows pressure to accumulate in the smaller lower chamber before being ejected from the nozzle, which forces the sealing part to shift in a shorter time and accelerates the ejection of the liquid, thus achieving the desired faster ejection effect.

[0027] 2. At the same time, by placing the valve seat acting on the sealing part in the upper chamber, the longitudinal length of the valve itself in the pre-compression chamber in the vertical direction can be effectively reduced. After the liquid stored in the cylinder is pressurized to a small threshold, the flow path can be opened quickly, and the sealing part is pulled back to the initial position by its own elasticity or characteristics. The "quick opening and quick closing" effect is achieved in the small "lower chamber" pressure storage space, which makes the sprayer have the function of accelerating the spraying speed and preventing liquid from dripping from the nozzle. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the sprayer in Embodiment 1 of the present invention;

[0029] Figure 2 This is a top view of the sprayer in Embodiment 1 of the present invention;

[0030] Figure 3 for Figure 2 Schematic diagram of the cross section at point AA;

[0031] Figure 4 for Figure 2 Schematic diagram of the cross section at point BB;

[0032] Figure 5 This is a schematic diagram of the water inlet state of the sprayer in Embodiment 1 of the present invention;

[0033] Figure 6 This is a schematic diagram of the sprayer spraying water in Embodiment 1 of the present invention;

[0034] Figure 7 This is a top view of the sprayer in Embodiment 2 of the present invention;

[0035] Figure 8 for Figure 7 Schematic diagram of cross-section at CC;

[0036] Figure 9 This is a schematic diagram of the water inlet state of the sprayer in Embodiment 2 of the present invention;

[0037] Figure 10 This is a schematic diagram of the sprayer spraying water in Embodiment 2 of the present invention. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to specific embodiments.

[0039] Example 1

[0040] like Figures 1-6 The present invention is shown as the preferred embodiment.

[0041] The structure and function of the sprayer will be further explained below.

[0042] Figures 3-6 This is a side sectional view of the sprayer.

[0043] The sprayer of this utility model has the following functions: when installed on a container (not shown), and with the cylinder 12 filled with liquid, the piston 13 is moved to the right side of the figure by rotating the wrench 14, pressurizing the liquid in the cylinder 12 (at this time, the valve structure 6 is open), causing the liquid to be sprayed out from the nozzle 11. In order to meet the user's needs, the nozzle 11 can spray, spray water, or be closed. For this purpose, a connector is provided on the nozzle 11. By adjusting the rotation angle of the connector relative to the nozzle 11, the nozzle 11 can be in at least one of the following spray states: spraying or closed. Alternatively, in the direction of liquid spraying, the nozzle 11 is provided with a mesh structure downstream of the spray nozzle that can convert the spray state into a foam state. This mesh structure can also enable the nozzle 11 to spray foam.

[0044] Conversely, by resetting the rotation of the wrench 14, the piston 13 moves upstream (to the left in the figure), creating a negative pressure in the cylinder 12, thereby filling the cylinder 12 with liquid from the container (at this time, the valve structure 6 is closed).

[0045] Furthermore, by simply providing a valve structure 6 in the fluid passage between the cylinder section 12 and the inlet pipe 5, it is sufficient to prevent the liquid entering the cylinder section 12 from flowing back into the container.

[0046] Structurally, the sprayer is used to draw in and spray liquid from a container, and includes: a spray gun body 1, an inlet pipe 5, and a cover. The spray gun body 1 includes: a nozzle section 11, a cylinder section 12, a piston 13, a wrench 14, a first elastic element for resetting, and a valve structure 6. Specifically, the spray gun body 1 is provided with an inlet pipe 5 for introducing liquid into the container and a nozzle section 11 for spraying liquid. It also includes a cylinder section 12 that is fluidly connected to the inlet pipe 5 and stores liquid; a piston 13 that is reciprocally movable at the outer end of the cylinder section 12 and forms a sealed inner cavity in the cylinder section 12; and a wrench 14 located on one side of the piston 13. The wrench 14 is used to push the piston 13 into the cylinder section 12, and the first elastic element is connected to the wrench 14 for resetting. Furthermore, the sprayer also includes a cover that covers the cylinder section 12 and the body.

[0047] In addition to the valve structure 6, a pre-compression structure 2 is also provided on the water outlet channel 4 between the cylinder section 12 and the nozzle section 11. This pre-compression structure 2 can prevent liquid from leaking outward and avoid liquid backflow, and also allows the user to generate a greater speed to discharge liquid with a smaller force of the actuating wrench 14.

[0048] The following section will mainly describe the pre-compression structure 2 that constitutes the sprayer.

[0049] refer to Figure 3The pre-compression structure 2 of the sprayer includes a valve seat 21 and a valve 22. In a simpler way, the valve 22, the spray gun body 1 and the valve seat 21 are arranged such that the valve seat 21, which is a cylindrical shape with its opening facing downward, is engaged with the spray gun body 1 to hold the valve 22 in the proper position, that is, upstream of the nozzle section 11.

[0050] In a simpler form, the outer periphery 222 of valve 22 directly abuts against the spray gun body 1 and forms a pre-compression chamber 3. Valve 22 includes a sealing part 221. When sufficient fluid pressure is generated in the lower chamber 32 after the liquid passes through it, the sealing part 221 can be forced to shift to open the second flow path 42 connecting to the water outlet channel 4 of the nozzle 11. The sealing part 221 divides the pre-compression chamber 3 into a relatively independent upper chamber 31 and a lower chamber 32. By using the sealing part 221 of valve 22 to divide the pre-compression chamber 3 into two relatively independent upper chamber 31 and lower chamber 32, pressure is allowed to accumulate in the smaller lower chamber 32 before being sprayed from the nozzle 11. This allows the sealing part 221 to shift in a shorter time, accelerating the liquid spray and achieving the desired faster spray. The valve seat 21 is provided with an action part 211 that is adapted to the sealing part 221. The action part 211 is housed in the upper chamber 31 and can prevent the sealing part 221 from continuing to flex or move. It also limits the liquid flow path through the lower chamber 32. The action part 211 that acts on the sealing part 221 of the valve seat 21 is located in the upper chamber 31. This can effectively reduce the longitudinal length of the valve 22 itself in the pre-compression chamber 3 in the vertical direction. After the liquid stored in the cylinder part 12 is pressurized to a small threshold, the flow path can be opened quickly. The sealing part 221 is pulled back to the initial position by its own elastic properties or characteristics. The "quick opening and quick closing" effect is achieved in the small "lower chamber 32" pressure storage space, so that the sprayer can accelerate the spraying speed and prevent liquid from dripping from the nozzle part 11.

[0051] Its specific structure is as follows:

[0052] like Figure 3As shown, in order to enable the pre-compression structure 2 to produce the expected "pre-pressure storage" effect, the ratio of the size of the lower chamber 32 to the chamber size of the cylinder 12 is 1:5. It should be noted that the lower chamber 32 is crucial for allowing pressure accumulation or pre-compression of fluids such as liquids or air. The greater the pre-pressure required by the sprayer, the smaller the ratio of its chamber size needs to be. If the ratio is too large, it can easily cause problems with liquid loading onto the spray gun body 1. Meanwhile, the vertical height H of the sealing part 221 from the spray gun body 1 is approximately 1.2 mm. The vertical height H of the sealing part 221 from the spray gun body 1 directly determines the size of the lower chamber 32. As mentioned above, the limitation of this vertical height H is a decisive factor in maintaining the pressure accumulation or pre-compression of the fluid, such as liquid or air. The valve 22 as a whole can be made of an elastomeric material, which utilizes its sealing part 221 to flex, move, or deform when a certain amount of force is applied. Its material can also be selected according to the required discharge force. Since the sealing part 221 is pulled back to its initial position only by utilizing its own elastic properties or characteristics, the problem of "fast opening and slow closing" in the prior art is avoided, and the effect of "fast opening and fast closing" is achieved. At the same time, the sealing part 221 also needs to have a preset thickness Th, and Th = 0.8 mm, and is horizontally perpendicular to the vertical tube body 16. The sealing part 221 is set at a preset thickness, which is determined by the resistance or minimum opening pressure required for the sealing part 221 to be displaced to open the water outlet channel 4. In this embodiment, a thicker part is selected, so that the preset thickness can help generate sufficient fluid pressure in the lower chamber 32 to a certain extent.

[0053] In addition, in order to further generate the expected "pre-pressure storage" effect, an inner periphery 223 is also provided at intervals inside the outer periphery 222 of the valve 22. The inner periphery 223 is thicker than the outer periphery 222 and abuts against the spray gun body 1. The inner periphery 223 divides the internal space of the lower chamber 32 into a first chamber 321 and a second chamber 322 from the center to the outside. A water passage 224 is opened at the bottom of the inner periphery 223. After the liquid flows into the first chamber 321, it flows through the water passage 224 to the second chamber 322, and the outer periphery 222 is kept in a sealed state by means of the surface tension of the liquid. The size of the chamber is further reduced by means of the inner periphery 223. In addition to the function of "separation", the inner periphery 223 is required to be thicker than the outer periphery 17, which can also further perform the function of pressure storage. At the same time, a water passage 224 is provided at its bottom. When the liquid flows through the water passage 224 to the second chamber 322, its incompressibility makes the outer periphery 222 keep in a sealed state. Due to the design of the first chamber 321, the water outlet channel 4 also has a special design. Unlike the inverted "L" shape of the water outlet channel 4 between the cylinder 12 and the nozzle 11 in the prior art, the water outlet channel 4 in this embodiment is divided into a "nested" first flow path 41 and a second flow path 42. The first flow path 41 connects the cylinder 12 and the lower chamber 32, while the second flow path 42 connects the lower chamber 32 and the nozzle 11. When the wrench 14 is actuated, the piston 13 moves to the rear and pressurizes the liquid in the cylinder 12, so that the liquid first enters the first flow path 41 located on the periphery. This allows the pressure to be accumulated in the first chamber 321 before being ejected from the nozzle 11. When the pressure accumulates to a preset threshold, it can force the sealing part 221 to shift (in this embodiment, the shift means "at least partially bent upward") and the liquid is ejected at an accelerated speed.

[0054] Finally, to better install the pre-compression structure 2, in this embodiment, the pre-compression structure 2 is set on the top of the spray gun body 1. The top of the spray gun body 1 has an upwardly extending upper circumferential edge 15, and the valve seat 21 is closed and sealed to the upper circumferential edge 15. The second flow path 42 is formed by a vertical tube 16 perpendicular to the axial direction of the cylinder part 12, and the spray gun body 1 has a circumferential wall 17 around the vertical tube 16, which together form the first flow path 41. While the outer circumferential edge 222 of the valve 22 is sealed to the upper circumferential edge 15, the sealing part 221 is held on the top edge of the vertical tube 16, and the working part 211 of the valve seat 21 is a protruding post that is parallel to the axial direction of the vertical tube 16 and protrudes downward. The lower end face of the protruding post can contact the sealing part 221 when in action, so that the continued bending or movement of the sealing part 221 is prevented, and the fluid flow channel through the lower chamber 32 is fixed. When the pressure applied to valve 22 decreases, the valve 22 sealing part 221 can return to the unacted position, thereby preventing the flow of liquid through valve 22.

[0055] In summary, the spraying process of this sprayer is as follows: First, the user selects the nozzle section 11 with a mesh structure according to whether foam generation is required. Then, depending on the usage requirements, the user selects the indicator icon corresponding to the connector on the nozzle section 11 to spray or turn off the spray. After adjusting the rotation angle of the connector, pressing the wrench 14 to apply liquid... Figure 5 As shown, the outer skirt of the valve structure 6 is forced open, thereby opening the outlet end of the third flow path 7 of the inlet pipe 5 to the cylinder section 12. The reduced pressure generated in the cylinder section 12 is used as power to drive the liquid from the fluid-connected container into the cylinder section 12 to reach the metered amount. The liquid in the cylinder section 12 instantly blocks the outlet end of the third flow path 7, which can effectively seal the outlet end of the third flow path 7 and prevent the liquid from flowing back towards the container.

[0056] Pressing the wrench 14 again, due to the incompressibility of the liquid, forces the piston 13 of the valve structure 6 to move downstream (to the right in the figure) while the wrench 14 is pressed. This causes the first elastic element to deform and store energy. The liquid flows from the cylinder section 12 to the first flow path 41 through the water inlet of the pre-compression structure 2 near the inner wall of the cylinder section 12. Furthermore, taking advantage of the smaller vertical height H of the sealing part 221 from the spray gun body 1, its greater thickness, and the greater thickness of its inner periphery 223, the pressure is allowed to accumulate quickly when the liquid flows into the first chamber 321. When the pressure accumulates to a preset threshold, it forces the sealing part 221 to bend upwards, opening the inlet of the second flow path 42. The lower end face of the protrusion can contact the sealing part 221 during operation, preventing further bending of the sealing part 221 and fixing the fluid flow channel through the lower chamber 32. After the liquid flows through the first flow path 41 to the first chamber 321, it forms an inverted "L" flow path and enters the inlet of the second flow path 42, thus accelerating the liquid out. The liquid in the cylinder part 12 instantly presses against the flow path corresponding to the inlet pipe 5, preventing the liquid from flowing back towards the container (e.g. Figure 6 As shown), at this time, the outside air is connected to the container through the air inlet to achieve air pressure balance; when the wrench 14 is stopped, the wrench 14 is reset under the reset action of the first elastic element. At this time, the piston 13 can return to the original position, and the sealing part 221 of the valve 22 can return to the unacted position, thereby preventing the liquid from flowing through the valve 22, and the liquid in the container is refilled into the cylinder part 12 (at this time, the corresponding outer skirt in the valve structure 6 opens).

[0057] Example 2:

[0058] like Figure 7-10As shown, the structure is basically the same as that of the embodiment, with the only difference being that the sealing part 221 is an arc shape with the opening facing upwards, and has a "nipple-like" protrusion 220 in the center to block the second flow channel 42, with a preset thickness Th = 0.6 mm. The spray gun body 1 has at least a partial platform 18 for mounting the valve 22 on a circumferential wall 17 surrounding the vertical tube 16. The valve 22 according to several different embodiments of the present invention can be made of any desired material. The valve 22 can be formed of an elastic material or a material that can deform and return to a non-deformed state, or it can be formed of olefin-based polymers, silicon, other polymer materials or plastic materials. Of course, the size of the lower chamber 32 corresponding to the valve 22, the thickness of the sealing part 221 and the vertical height relative to the spray gun body 1 can also be adaptively selected according to the pre-compression structure 2 to generate the pre-pressure.

Claims

1. A sprayer having a spray gun body (1) capable of drawing in and spraying liquid from a container, the spray gun body (1) including a nozzle portion (11) for spraying liquid and a pre-compression structure (2) for accelerating the spraying of liquid from the nozzle portion (11); Its features are: The pre-compression structure (2) includes a valve seat (21) and a valve (22), wherein the valve seat (21) and the spray gun body (1) are engaged to hold the valve (22) in the proper position, i.e., upstream of the nozzle section (11); The outer periphery (222) of the valve (22) abuts against the spray gun body (1) and / or valve seat (21) and forms a pre-compression chamber (3). The valve (22) includes a sealing part (221). When the liquid passes through the lower chamber (32) and generates sufficient fluid pressure, the sealing part (221) can be forced to be displaced to open the water outlet channel (4) connected to the nozzle part (11). The sealing part (221) divides the pre-compression chamber (3) into a relatively independent upper chamber (31) and a lower chamber (32). Correspondingly, the valve seat (21) is provided with an action part (211) adapted to the sealing part (221). The action part (211) is housed in the upper chamber (31) and can prevent the sealing part (221) from continuing to flex or move, and limit the liquid flow path through the lower chamber (32).

2. The sprayer according to claim 1, characterized in that: The ratio of the size of the lower chamber (32) to the size of the cylinder section (12) must be between 1:4 and 1:

6. The cylinder section (12) is in fluid communication with the inlet pipe (5) of the container and is used to store liquid.

3. The sprayer according to claim 1 or 2, characterized in that: The vertical height H of the sealing part (221) from the spray gun body (1) is between 1 mm and 1.4 mm.

4. The sprayer according to claim 3, characterized in that: The valve (22) is further provided with an inner periphery (223) at intervals on the outer periphery (222). The inner periphery (223) is thicker than the outer periphery (222) and abuts against the spray gun body (1). The inner periphery (223) divides the internal space of the lower chamber (32) into a first chamber (321) and a second chamber (322) from the center to the outside. The bottom of the inner periphery (223) has a water passage (224). After the liquid flows into the first chamber (321), it flows through the water passage (224) to the second chamber (322). The outer periphery (222) is kept in a sealed state by means of the surface tension of the liquid.

5. The sprayer according to claim 2, characterized in that: The spray gun body (1) also includes: A piston (13) is reciprocally disposed at the outer end of the cylinder section (12) and is used to form a sealed inner cavity in the cylinder section (12); A wrench (14) is provided on one side of the piston (13) for pushing the piston (13) toward the cylinder (12) from front to back; as well as The pre-compression structure (2) is provided on the water outlet channel (4) between the cylinder part (12) and the nozzle part (11). When the liquid generates sufficient fluid pressure in the lower chamber (32), it can force the sealing part (221) to be displaced to open the water outlet channel (4) connected to the nozzle part (11).

6. The sprayer according to claim 5, characterized in that: The water outlet channel (4) between the cylinder section (12) and the nozzle section (11) includes a first flow path (41) connecting the cylinder section (12) and the lower chamber (32) and a second flow path (42) connecting the lower chamber (32) and the nozzle section (11). The first flow path (41) is located outside the second flow path (42). The outlet of the first flow path (41) is lower than the inlet of the second flow path (42), so that after the liquid flows through the first flow path (41) to the pre-compression chamber (3), it forms at least a partially inverted flow path and then enters the inlet of the second flow path (42).

7. The sprayer according to claim 6, characterized in that: The pre-compression structure (2) is disposed on the top of the spray gun body (1). The top of the spray gun body (1) has an upwardly extending upper edge (15), and the valve seat (21) is a cylindrical shape with the opening facing downward. The valve seat (21) and the upper edge (15) are relatively merged and sealed together. The second flow path (42) is formed by a vertical tube (16) perpendicular to the axial direction of the cylinder part (12). The spray gun body (1) is provided with a circumferential wall (17) around the vertical tube (16) and together they form the first flow path (41). The circumferential wall (17) has at least a partial platform (18) for the valve (22) to be installed. While the outer periphery (222) of the valve (22) and the upper edge (15) are kept sealed, the sealing part (221) is held on the top edge of the vertical tube (16).

8. The sprayer according to claim 7, characterized in that: The sealing part (221) has a preset thickness Th, and 0.4mm≤Th≤0.9mm, and is in a horizontal shape perpendicular to the vertical tube (16) or an arc shape with the opening facing upward.

9. The sprayer according to claim 8, characterized in that: The function part (211) of the valve seat (21) is a protruding post that is parallel to the axial direction of the vertical tube (16) and protrudes downward.

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