Sprayer

Abstract

The utility model relates to a sprayer which is used for sucking and spraying out liquid in a container, a main body is provided with an ingress pipe and a nozzle part, the sprayer further comprises an air cylinder part, a piston, a wrench and the like, and is characterized in that a first valve structure is arranged on a water outlet channel between the air cylinder part and the nozzle part; the first valve structure is constructed to be capable of closing a flow path between the guide-in pipe and the air cylinder part all the time under pressurization of liquid in the air cylinder part, when the wrench triggers the first valve structure to be opened, the liquid in the air cylinder part is sprayed out of the nozzle part, and a switching valve is further arranged at the upper end of the guide-in pipe and comprises at least two inverted liquid pumping ports. The sprayer has the advantages that the built-in switching valve is installed, so that the sprayer can normally work in the vertical mode and the inverted mode, the sprayer is detachably installed at the upper end of the guide-in pipe, and the damage proportion in the transportation process can be greatly reduced; the first valve structure can further increase the spraying speed and prevent liquid from leaking.

Description

Technical Field

[0001] The present invention relates to the technical field of sprayers, and particularly to a pump sprayer manually operated by a trigger rod. Background Art

[0002] A sprayer is a miniature sprayer. Such products utilize the movement of a piston in a pump body to cause the gas in the pump body to flow, reducing the pressure. The pressure outside the pump body remains unchanged, creating a pressure difference between the inside and outside of the pump body. Through this pressure difference, the liquid is conducted out of the pump body. When the liquid encounters a high-speed air flow, it is instantly atomized. For example, the "a spray gun" disclosed in Chinese Patent ZL201620320123.8 and the "a spray gun body" disclosed in ZL201620317419.6 belong to the valve structure of this type of steel ball seat.

[0003] However, since sprayers can be commonly used for, for example, household hygiene, room deodorization, or treating fabrics before ironing, etc., for different usage scenarios, it is required that the sprayer can not only be used with the bottle placed upright, but also be able to spray liquid normally when the bottle is inverted. Therefore, there have also emerged many liquid sprayers integrated with a USD (inverted) device in the market, such as integrated in the lower area of the sprayer body. Examples of this type of sprayer are described in the "inverted sprayer" disclosed in Chinese Patent ZL202121066548.8 or ZL202321095444.9. In order to be able to be used in the inverted state, a special assembly route is designed, such as setting a liquid guide tube, a marble, and a corresponding inverted valve structure. Although this sprayer solves the problem of being able to be used in the inverted state, it still has the following limitations during use:

[0004] First, due to the newly added liquid guide tube structure, the liquid filling stroke is actually extended, resulting in a slower liquid filling speed.

[0005] Second, the function of the air inlet is to supplement air to the container bottle filled with cleaning water in both the upright and inverted postures to avoid the phenomenon of the bottle body being deformed during the pumping process. However, in the inverted posture, during the air supplement process of operating the piston of the pump body, the cleaning water in the container bottle will also leak out from this air inlet, causing a liquid leakage phenomenon.

[0006] Third, many additional components are necessary for operation in both the upright and inverted positions. This not only increases the manufacturing cost of the sprayer, but also significantly increases the damage ratio during transportation due to being integrated in the lower area of the sprayer body. Summary of the Invention

[0007] The first technical problem to be solved by the present invention is to provide a sprayer with a built-in USD device to significantly reduce the damage ratio during transportation in view of the above-mentioned current situation of the prior art.

[0008] The second technical problem to be solved by the present invention is to provide a sprayer that can reduce the pressure loss during pressing and is beneficial to improving the liquid supply speed in view of the above-mentioned current situation of the prior art.

[0009] The third technical problem to be solved by the present invention is to provide a sprayer that is not prone to liquid leakage whether in an upright or inverted position in view of the above-mentioned current situation of the prior art.

[0010] The fourth technical problem to be solved by the present invention is to provide a sprayer that can achieve simple installation steps, thereby limiting the increase in product cost in view of the above-mentioned current situation of the prior art.

[0011] The technical solution adopted by the present invention to solve the first technical problem is as follows: The sprayer, which can be used to suck and eject the liquid in the container, includes a main body, and an inlet pipe for introducing the liquid in the container and a nozzle part for ejecting the liquid are provided on the main body. It also includes:

[0012] A cylinder part, which can be in fluid communication with the inlet pipe and store the liquid;

[0013] A piston, which is reciprocally movably arranged at the outer end of the cylinder part and is used to form a closed inner cavity in the cylinder part;

[0014] A wrench, which is arranged on one side of the piston and is used to push the piston from front to back into the cylinder part;

[0015] It is characterized in that:

[0016] A first valve structure is provided on the water outlet channel between the cylinder part and the nozzle part, and the first valve structure is configured to always close the flow path between the inlet pipe and the cylinder part under the pressure of the liquid in the cylinder part. When the wrench triggers the piston to press, so that the hydraulic pressure in the cylinder part exceeds the preset pressure of the first valve structure, the first valve structure is opened and the liquid in the cylinder part is ejected from the nozzle part;

[0017] A switching valve is further equipped at the upper end of the inlet pipe. The switching valve includes a first valve seat, a first valve ball and at least two inverted liquid pumping ports formed in the first valve seat, so that the sprayer can be operated in an upright mode or an inverted mode.

[0018] In order to connect the switching valve with the inlet pipe, preferably, the switching valve is constructed on a connecting member. The connecting member is used to detachably connect and position at the upper end of the inlet pipe. The connecting member includes a socket into which the upper end of the inlet pipe can be inserted. Through the design of the connecting member, the USD function can be used with minimal modification, which is convenient for achieving simple installation steps, thereby limiting the increase in product cost.

[0019] Furthermore, in order to enable the switching valve to eject liquid even when the sprayer is in the downward inverted position, preferably, an inlet chamber communicating with the switching valve is provided at the rear of the cylinder portion in the main body, and the inlet chamber communicates with the outlet passage or the cylinder portion. Correspondingly, the connecting member includes an upper connecting portion in the lower section of the main body and a lower connecting portion in the threaded collar of the container, where:

[0020] The upper connecting portion constitutes the first valve seat of the switching valve and a connecting pipe arranged side by side and spaced apart from the first valve seat. The connecting pipe is embedded in the inlet chamber, and the lower connecting portion includes a communication cavity formed by mating with the upper connecting portion. The communication cavity, the first valve seat, and the connecting pipe are in fluid communication with the inlet chamber and the inlet pipe. The inverted liquid pumping port includes a first port provided on the first valve seat, and the switching valve is configured to: close the first port when the sprayer is in the upward upright position, and open the first port when the sprayer is in the downward inverted position so that liquid can flow from the container to the inlet chamber.

[0021] Adopting the design of integrating the switching valve structure into the upper connecting portion, first, it can reduce the internal structure of the main body; second, when the sprayer is in the upward upright position, the first valve ball of the switching valve closes the first port on the first valve seat, which can prevent the liquid from flowing to the first port when the cylinder portion sucks liquid, resulting in a reduction in the liquid flowing into the inlet chamber, and effectively improves the liquid filling speed; third, the split cooperation setting of the lower connecting portion and the upper connecting portion not only meets the requirement of convenient installation but also forms a sealed communication cavity, enabling the liquid to directly enter the inlet chamber through the communication cavity via the inlet pipe in the upright mode; or in the inverted mode, the first valve ball of the switching valve opens the first port on the first valve seat, and the liquid can directly enter the first valve seat through the communication cavity via the inlet pipe. The first valve seat constitutes the "outlet cavity" in the inverted mode and finally enters the inlet chamber, thus realizing the inverted mode.

[0022] For further design, to enable the liquid to flow into the water inlet chamber when the sprayer is in a downward inverted state, preferably, the inverted liquid pumping port includes a second port provided on the lower connecting portion, the second port is located on the front side of the socket, an air supplement port for supplementing external air into the container is formed on the cylinder portion, and an air guiding chamber communicating with the air supplement port is provided on the main body. The lower portion of the air guiding chamber faces the second port and there is a first gap left. A closing seat opening downward and used for closing the first valve seat is provided on the main body. A second gap communicating with the first gap is formed between the closing seat and the first valve seat. And when the sprayer is in a downward inverted position, the first port is opened so that the liquid can flow from the second port through the first gap and the second gap into the water inlet chamber.

[0023] The air supplement port is provided to maintain the air pressure balance in the bottle and avoid the situation that the pressure in the bottle is too small to suck out the liquid or the bottle body is deformed. The function of the closing seat is that when the sprayer is in a downward inverted state, the liquid does not enter through the inlet pipe, but enters through the second port communicating with the container, and the second port is located above the inlet pipe. In this way, through the bottom closing end of the closing seat, it can be achieved that when the sprayer is in a downward inverted state, the liquid can only flow into the water inlet chamber through the second port, the first gap and the second gap. In addition, according to actual needs, at least two inwardly protruding ridges can be circumferentially spaced on the inner wall of the closing seat, that is, in the shape of a "conical funnel", and a fluid channel communicating with the first gap is formed between adjacent ridges. Each ridge constitutes an upper limit portion for preventing the first valve ball from moving upward. Due to its own gravity, the first valve ball seals the first port to prevent air or fluid from being sucked through the inlet pipe during upright actuation.

[0024] To solve the second technical problem, preferably, the lower connecting part includes a lower cylinder body. The center of the bottom of the lower cylinder body has a liquid inlet that communicates with the inlet pipe for liquid to flow in. A first pipe body extends upward from the periphery of the liquid inlet and a second pipe body extends downward. The second pipe body forms the socket, and the first pipe body is correspondingly located in the gap between the first valve seat and the connecting pipe. There is a third gap between the upper end of the first pipe body and the gap part. A blocking member is arranged on the front side of the first pipe body. When the sprayer is in an upright position upward, the blocking member is used to block the flow of the liquid flowing out through the third gap towards the first valve seat. The applicant needs to emphasize that the setting of the "blocking member" is the key to solving the problem of improving the liquid supply speed in the upright mode. If there is no blocking member, when the sprayer is in an upright state and liquid is being supplied, the liquid will pass through the inlet pipe, the communication cavity, and the water inlet chamber. Under the impact of the liquid, the position of the first valve ball may shift, which causes the first valve ball to be opened, resulting in the switching valve being briefly opened, making the air pressure in the water inlet chamber consistent with that of the container through the second port, causing the vacuum environment required in the cavities between the inlet pipe, the communication cavity, and the water inlet chamber to disappear, resulting in liquid supply pressure loss and reduced liquid supply speed. However, the setting of this blocking member can cleverly avoid the impact of the liquid on the first valve ball, so as to avoid pressure loss and improve the liquid supply speed.

[0025] To prevent the blocking member from interfering with the liquid supply to the cylinder part when the sprayer is in an inverted state downward, preferably, the blocking member includes a first plate body. The top of the first plate body is higher than the upper end of the first pipe body, and the length of the first plate body is greater than the outer edge of the bottom of the first valve seat. The top of the first plate body abuts against the outer edge of the bottom of the first valve seat; the first plate body divides the internal space of the communication cavity into a first cavity corresponding to the first port and a second cavity corresponding to the connecting pipe from front to back in sequence. There is a fourth gap between the periphery of the first plate body and the peripheral wall of the lower cylinder body. When the sprayer is in an inverted position downward, it allows the liquid to flow from the second cavity through the fourth gap and the third gap into the first cavity and then into the water inlet chamber. In fact, there are various choices for the structure of the blocking member. The advantage of preferably designing it into a plate shape in this solution is as follows:

[0026] First, on the premise of achieving the blocking effect, its structure is the simplest, which is easy to process in production and can effectively limit the increase in product cost;

[0027] Second, the function of the blocking member is similar to that of the "water retaining plate in a water channel". In addition to the relationship that the top height and length need to abut against the bottom of the first valve seat, its width also needs to meet the requirement that it does not affect the liquid supply when used in an inverted state, that is, it cannot completely block the first port of the first valve seat, and the liquid can enter the communication cavity from the second port through the first port.

[0028] To solve the third technical problem, preferably, the upper connecting part includes an upper cylinder body. The upper cylinder body includes an outer peripheral wall and an inner peripheral wall spaced from the outer peripheral wall. A slot for inserting the peripheral wall of the lower cylinder body is formed between the outer peripheral wall and the inner peripheral wall, and a sealed state is maintained when the two are joined. The upper cylinder body further extends a second plate body downward to the lower part of the air guiding chamber. The air guiding chamber is formed by extending downward from the periphery of the air supplement port. A one-way valve is provided at the upper end of the air guiding chamber. The one-way valve includes a second valve ball and a second valve seat communicated with the air supplement port. When the sprayer is in the downward inverted position, the second valve ball closes the second valve seat to prevent liquid from leaking out of the air supplement port. When the sprayer is in the upward upright position, the second plate body constitutes a lower limit part for limiting the second valve ball. Through the setting of the one-way valve, it is possible to avoid the phenomenon that liquid leaks to the outside through the air supplement port when the sprayer is in the downward inverted position. In addition to forming a sealed communication cavity in cooperation with the specifically designed lower connecting part, the upper connecting part of the connecting member also has the function of "serving two purposes with one object", that is, the second plate body provided on the upper cylinder body also has the function of limiting the downward movement of the second valve ball.

[0029] Further, to avoid the possibility that liquid may still leak to the outside through the one-way valve during the air supplement process, preferably, a air supplement chamber is further connected to the lower end of the air guiding chamber. The air supplement chamber includes an upper part and a lower part that are opposed to each other. Among them, the upper part extends a first annular wall part downward. There are at least two first annular wall parts, which are sequentially spaced from the center to the periphery. The lower part extends at least two second annular wall parts upward. The second annular wall parts are also sequentially spaced from the center to the periphery. Each second annular wall part is inserted into the space formed between the first annular wall parts. A tortuous air flow channel is formed between the adjacent first annular wall part and the second annular wall part. The air flow channel is in fluid communication with the air guiding chamber and the container. Through the special design of the air supplement chamber, the problem of liquid leakage caused by air supplement when the sprayer is used upside down can be cleverly solved. The principle is as follows: The air supplement chamber has a tortuous air flow channel communicated with the air guiding chamber. Even if liquid enters, on the one hand, due to the relatively narrow and tortuous air flow channel, the liquid enters at a slower speed. And because the air flow channel is relatively narrow, the gas can block the further entry of the liquid, so as to avoid the problem that liquid may still leak to the outside through the one-way valve during the air supplement process. Of course, for the sprayer itself, the air supplement chamber is an optional component, and the user can choose to insert and match it according to needs. When inserting and matching, only need to insert it to the lower end of the air guiding chamber. At the same time, a liquid inlet similar to a "second port" needs to be added correspondingly during use. In addition, the air supplement chamber can also be integrally provided with the upper connecting part or the lower connecting part. Therefore, actually when the air supplement chamber is provided, the lower limit part inside it for limiting the second valve ball can also be regarded as the second plate body on the upper cylinder body.

[0030] To solve the fourth technical problem, preferably, the water outlet channel is directly communicated with the water inlet chamber, and the first valve structure is arranged at the rear end of the water outlet channel, including a third valve seat communicated with the water inlet chamber and a third valve ball arranged on the front side of the third valve seat. When the water inlet chamber is filled with liquid, the third valve ball is forced to open so that the water outlet channel and the nozzle part are in fluid communication. The design of directly adopting the third valve ball on the first valve structure at the rear end of the water outlet channel can simplify the structure more, and the installation steps are also simple. When installing, only the nozzle part needs to be opened, and the third valve ball is stuffed into the water outlet channel. Under the action of its own weight, the third valve ball can better open and close the water outlet channel.

[0031] To solve the fourth technical problem, in addition to the above-mentioned solution of directly opening and closing the water outlet channel by using the third valve ball, there is another feasible solution, that is: the water outlet channel is communicated with the water inlet chamber through the cylinder part, the first valve structure is arranged at the connection of the cylinder part and the water inlet chamber, and a water outlet rod communicated with the nozzle part is arranged in the water outlet channel. A water passing channel communicated with the cylinder part is arranged in the water outlet rod. The water outlet position of the water passing channel is lower than the nozzle part. The end of the water outlet rod is provided with a water passing hole communicated with the water passing channel, and an elastic plugging member is arranged at the end of the pipeline of the water outlet channel. The plugging member always closes the water passing hole in the natural state. When the hydraulic pressure in the water outlet channel reaches the preset pressure of the plugging member, the plugging member is forced to open and the liquid passes through the water passing hole. To solve the phenomenon that there will be dripping at the nozzle part after the liquid spraying is finished, there are two key factors in this solution. First, the plugging member can always close the water passing hole in the natural state, so as to avoid the liquid leaking from the nozzle part. Second, the water outlet position of the water passing channel is designed to be always lower than the nozzle part. According to the natural law of "water flows to lower places", even if there is unsprayed liquid left in the water passing channel, it will not flow out to the nozzle part located at a higher place. In addition, the plugging member also has the function of "energy storage", which can make the liquid have a faster spraying speed when spraying out from the water outlet channel, so it is also beneficial for users with poor grip strength such as children or the elderly.

[0032] Compared with the prior art, the advantages of the present invention are as follows:

[0033] 1. By installing a built-in switching valve, not only can the sprayer work normally in both the upright mode and the inverted mode, but also the switching valve is detachably installed at the upper end of the inlet pipe, so that the damage ratio of the switching valve during transportation can be greatly reduced;

[0034] 2. When the hydraulic pressure in the cylinder part exceeds the preset pressure of the first valve structure, the liquid in the cylinder part can be sprayed out from the nozzle part, so that it also has a certain effect of accelerating the spraying speed and preventing the liquid from dripping from the nozzle part. Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of the sprayer in Embodiment 1 of the present invention;

[0036] Figure 2 It is a schematic structural diagram of the main body in Embodiment 1 of the present invention;

[0037] Figure 3 It is a middle cross-sectional view of the sprayer in the upright position in Embodiment 1 of the present invention;

[0038] Figure 4 It is a partially enlarged schematic structural diagram of the connection member area in Embodiment 1 of the present invention;

[0039] Figure 5 It is a partially enlarged schematic structural diagram of the switching valve area in Embodiment 1 of the present invention;

[0040] Figure 6 It is a middle cross-sectional view of the switching valve in Embodiment 1 of the present invention;

[0041] Figure 7 It is an exploded structural diagram of the switching valve in Embodiment 1 of the present invention;

[0042] Figure 8 It is an exploded structural diagram of the air supplement chamber in Embodiment 1 of the present invention;

[0043] Figure 9 It is a middle cross-sectional view of the air supplement chamber in Embodiment 1 of the present invention;

[0044] Figure 10 It is a middle cross-sectional view of the liquid outlet rod in Embodiment 1 of the present invention;

[0045] Figure 11 It is a state schematic diagram of the liquid inlet state of the sprayer in the upright position in Embodiment 1 of the present invention;

[0046] Figure 12 It is a state schematic diagram of the liquid spraying state of the sprayer in the upright position in Embodiment 1 of the present invention;

[0047] Figure 13 It is a state schematic diagram of the liquid inlet state of the sprayer in the inverted position in Embodiment 1 of the present invention;

[0048] Figure 14 It is a state schematic diagram of the liquid spraying state of the sprayer in the inverted position in Embodiment 1 of the present invention;

[0049] Figure 15 It is a middle cross-sectional view of the sprayer in the upright position in Embodiment 2 of the present invention;

[0050] Figure 16Schematic diagram of the upper connection part in Embodiment 2 of the present invention;

[0051] Figure 17 Schematic diagram of the liquid inlet state when the sprayer is in the upright position in Embodiment 2 of the present invention;

[0052] Figure 18 Schematic diagram of the liquid spraying state when the sprayer is in the upright position in Embodiment 2 of the present invention;

[0053] Figure 19 Schematic diagram of the liquid inlet state when the sprayer is in the inverted position in Embodiment 2 of the present invention;

[0054] Figure 20 Schematic diagram of the liquid spraying state when the sprayer is in the inverted position in Embodiment 2 of the present invention;

[0055] Figure 21 Middle cross-sectional view when the sprayer is in the upright position in Embodiment 3 of the present invention;

[0056] Figure 22 Middle cross-sectional view when the sprayer is in the upright position in Embodiment 4 of the present invention.

[0057] Figure 23 Middle cross-sectional view when the sprayer is in the upright position in Embodiment 5 of the present invention. Detailed implementation manners

[0058] The present invention will be further described in detail below in conjunction with specific embodiments.

[0059] Embodiment 1

[0060] As Figures 1 - 10 shown is the best embodiment of the present invention.

[0061] The structure and function of the sprayer will be further described below.

[0062] Figure 3 Side view cross-sectional view of the sprayer.

[0063] The sprayer of the present invention has the following functions: It includes a main body 1 installed on a container (not shown), an inlet pipe 11 for introducing the liquid in the container and a nozzle part 12 for spraying the liquid are provided on the main body 1, and it also includes a cylinder part 2, a piston 21 and a wrench 22. The cylinder part 2 can be in fluid communication with the inlet pipe 11 and store the liquid; the piston 21 is arranged at the outer end of the cylinder part 2 so as to be reciprocally movable and is used to form a closed inner cavity in the cylinder part 2; the wrench 22 is arranged on one side of the piston 21 and is used to push the piston 21 backward from the front into the cylinder part 2. When the cylinder part 2 is filled with liquid, by rotating the wrench 22, the piston 21 moves backward in the figure, pressurizes the liquid in the cylinder part 2, and makes the liquid spray out from the nozzle part 12. In order to enable the nozzle part 12 to achieve spraying, spraying water or closing when meeting the user's usage requirements, a connector is provided on the nozzle part 12. By adjusting the rotation angle of the connector relative to the nozzle part 12, at least one of the following liquid spraying states of the nozzle part 12 can be achieved: spraying or closing. Or in the liquid spraying direction, a mesh structure capable of converting the liquid spraying state into a foam state is provided downstream of the liquid spraying port of the nozzle part 12, and this mesh structure can also enable the nozzle part 12 to spray foam. In addition, on the contrary, by rotating the wrench 22 in the reverse direction, the piston 21 moves upstream (left side in the figure), a negative pressure is generated in the cylinder part 2, and thus the liquid in the container is filled into the cylinder part 2.

[0064] In addition to the above basic spraying function, the applicant has mainly made a technical improvement to the sprayer by internally installing a USD device, and at the same time, it is a spraying device that can improve the liquid filling speed and avoid the phenomenon of liquid leakage.

[0065] Specifically in terms of the structure, a first valve structure 3 is provided on the water outlet channel 13 between the cylinder part 2 and the nozzle part 12. The first valve structure 3 is configured to always close the flow path between the inlet pipe 11 and the cylinder part 2 under the pressure of the liquid in the cylinder part 2. When the wrench 22 triggers the piston 21 to press, so that the hydraulic pressure in the cylinder part 2 exceeds the preset pressure of the first valve structure 3, the first valve structure 3 is opened and the liquid in the cylinder part 2 sprays out from the nozzle part 12. A switching valve 4 is also equipped at the upper end of the inlet pipe 11. The switching valve 4 includes a first valve seat 41, a first valve ball 42 and at least two inverted liquid pumping ports 43 formed in the first valve seat 41, so that the sprayer can operate in an upright mode or an inverted mode.

[0066] The specific structure of the switching valve 4 is as Figure 3As shown, the switching valve 4 is constructed on the connecting member 5, and the connecting member 5 is detachably connected and positioned at the upper end of the inlet pipe 11. The connecting member 5 includes a socket 51 into which the upper end of the inlet pipe 11 can be inserted. Through the design of the connecting member 5, it is an effective way to enable the USD function with minimal modification. In addition, in order to enable the switching valve 4 to spray liquid when the sprayer is in the downward inverted position, in addition to the connecting member 5, a water inlet chamber 14 communicating with the switching valve 4 needs to be provided in the main body 1 at the rear of the cylinder portion 2. The water inlet chamber 14 is directly communicated with the water outlet passage 13 or communicated with the water outlet passage 13 through the cylinder portion 2. In this embodiment, the case where the water inlet chamber 14 is communicated with the water outlet passage 13 through the cylinder portion 2 is taken as an example for the following description:

[0067] Reference Figure 6 and Figure 7 , the connecting member 5 includes an upper connecting portion 52 located in the lower section of the main body 1 and a lower connecting portion 53 located in the threaded collar 15 of the container. The upper connecting portion 52 constitutes the first valve seat 41 of the switching valve 4 and a connecting pipe 521 arranged side by side and spaced apart from the first valve seat 41. The connecting pipe 521 is embedded in the water inlet chamber 14. The lower connecting portion 53 includes a communication cavity 54 formed by mating with the upper connecting portion 52. And the communication cavity 54, the first valve seat 41 and the connecting pipe 521 are in fluid communication with the water inlet chamber 14 and the inlet pipe 11. The inverted liquid pumping port 43 includes a first port 431 provided on the first valve seat 31. The switching valve 4 is arranged such that when the sprayer is in the upward upright position, the first port 431 is closed, and when the sprayer is in the downward inverted position, the first port 431 is opened so that liquid can flow from the container to the water inlet chamber 14. When the sprayer is in the upward upright position, the first valve ball 42 closes the first port 431 on the first valve seat 41. The purpose of this design is to avoid the liquid flowing to the first port 431 when the cylinder portion 2 sucks liquid, resulting in a reduction in the liquid flowing into the water inlet chamber 14, and at the same time effectively improving the liquid feeding speed. In addition, the split and mating setting of the lower connecting portion 53 and the upper connecting portion 52 not only meets the requirement of convenient installation but also cooperates to form a sealed communication cavity 54, so that in the upright mode, the liquid can directly enter the water inlet chamber 14 through the communication cavity 54 via the inlet pipe 11; or in the inverted mode, the first valve ball 42 of the switching valve 4 opens the first port 431 on the first valve seat 41, and the liquid can directly enter the first valve seat 41 through the communication cavity 54 via the inlet pipe 11. The first valve seat 41 constitutes the "water outlet cavity" in the inverted mode and finally enters the water inlet chamber 14, enabling the inverted mode to be realized.

[0068] Considering that gas needs to be replenished into the container during the use of the sprayer to balance the air pressure, such as Figures 4 - 6As shown in the figure, the inverted liquid pumping port 43 in this embodiment includes a second port 432 provided on the lower connection portion 53. The second port 432 is located on the front side of the socket 51. An air supplement port 23 is provided on the cylinder portion 2 for supplementing external air into the container. An air guiding chamber 16 communicating with the air supplement port 23 is provided on the main body 1. The lower part of the air guiding chamber 16 faces the second port 432 with a first gap 61 left therebetween. A closing seat 17 opening downward and used for closing the first valve seat 41 is provided on the main body 1. A second gap 62 communicating with the first gap 61 is formed between the closing seat 17 and the first valve seat 41. And when the sprayer is in the downward inverted position, the first port 431 is opened so that the liquid can flow from the second port 432 through the first gap 61 and the second gap 62 to the water inlet chamber 14. The air supplement port 23 can maintain the air pressure balance in the bottle to avoid the situation that the pressure in the bottle is too small to suck out the liquid or the bottle body becomes deflated. The function of setting the closing seat 17 is that when the sprayer is in the downward inverted state, the liquid does not enter through the introduction pipe 11 but through the second port 432 communicating with the container, and the second port 432 is located above the introduction pipe 11. In this way, through the bottom closed end of the closing seat 17, it can be achieved that when the sprayer is in the downward inverted state, the liquid can only flow from the second port 432 through the first gap 61 and the second gap 62 to the water inlet chamber 14. In addition, at least two inwardly protruding ridges are circumferentially spaced on the inner wall of the closing seat 17 in this embodiment, that is, it forms a "conical funnel" shape. A fluid channel communicating with the first gap 61 is formed between adjacent ridges. Each ridge constitutes an upper limit portion for preventing the first valve ball 42 from moving upward. Due to its own gravity, the first valve ball 42 seals the first port 431 to prevent air or fluid from being sucked through the introduction pipe 11 during upright actuation.

[0069] As described above, in the upright use state, the first valve seat 41 is closed, while in the inverted mode, it forms a "water outlet cavity" and finally enters the water inlet chamber 14, enabling the inverted mode to be realized. Therefore, the key to improving the liquid filling speed in the upright mode lies in that the first valve seat 41 is always closed to avoid the flow of liquid towards the first valve seat 41. For this reason, a key point in the structural design of the lower connection portion 53 is the setting of a "blocking member 55". Specifically refer to Figure 6 and 7, in this embodiment, the lower connection part 53 includes a lower cylinder body 531. In the center of the bottom of the lower cylinder body 531, there is a liquid inlet 532 communicating with the inlet pipe 11 for liquid to flow in. A first pipe body 533 extends upward from the periphery of the liquid inlet 532, and a second pipe body 534 extends downward. The second pipe body 534 forms a socket. The first pipe body 533 is correspondingly located in the gap part 522 between the first valve seat 41 and the connecting pipe 521. There is a third gap 63 between the upper end of the first pipe body 533 and the gap part 522. And a blocking member 55 is arranged on the front side of the first pipe body 533. When the sprayer is in the upright position upward, the blocking member 55 is used to block the flow of the liquid flowing out through the third gap 63 towards the first valve seat 41. If the blocking member 55 is not provided, when the sprayer is in the upright state upward and the cylinder part 2 sucks the liquid from the container, the liquid will pass through the inlet pipe 11, the communication cavity 54 and the water inlet chamber 14. Under the impact of the liquid, the position of the first valve ball 42 may shift, that is, the first valve ball 42 is opened, resulting in the switching valve 4 being briefly opened, and then the air pressure in the water inlet chamber 14 is kept consistent with that of the container through the second port 432, that is, the required vacuum environment in the cavity between the inlet pipe 11, the communication cavity 54 and the water inlet chamber 14 disappears, causing the loss of the liquid supply pressure and reducing the liquid supply speed. And the arrangement of the blocking member 55 can cleverly avoid the impact of the liquid on the first valve ball 42 to avoid the pressure loss and improve the liquid supply speed. Since the blocking member 55 can block the flow of the liquid flowing out through the third gap 63 towards the first valve seat 41, it may also prevent the liquid from flowing through the second port 432 and the first port 431 to the communication cavity 54 when the sprayer is in the inverted position downward. Therefore, the blocking member 55 is designed as a plate shape. The function of the blocking member 55 is similar to that of the "water retaining plate in the water channel". Except for the relationship that the top height and length need to abut against the bottom of the first valve seat 41, its width also needs to meet the requirement that it does not affect the liquid inlet when used in the inverted position, that is, it cannot completely block the first port 431 of the first valve seat 41, and the liquid can enter the communication cavity 54 from the second port 432 through the first port 431. The specific structure includes a first plate body 551. The top of the first plate body 551 is higher than the upper end of the first pipe body 533, and the length of the first plate body 551 is greater than the outer edge of the bottom of the first valve seat 41. The top of the first plate body 551 abuts against the outer edge of the bottom of the first valve seat 41, and the ratio of the length to the width of the first plate body 551 is about 8:1. In addition, the first plate body 551 divides the internal space of the communication cavity 54 into a first cavity 541 corresponding to the first port 431 and a second cavity 542 corresponding to the connecting pipe 521 in sequence from front to back. There is a fourth gap 64 between the periphery of the first plate body 551 and the peripheral wall of the lower cylinder body 531. When the sprayer is in the inverted position downward, the liquid flows from the second cavity 542 through the fourth gap 64 and the third gap 63 to the first cavity 541 and then enters the water inlet chamber 14.

[0070] In addition to increasing the liquid filling speed of the sprayer, another key problem needs to be solved, that is, whether in the upright or inverted position, it is not easy to cause liquid leakage. To solve this problem, the solution proposed by the applicant is still integrated on the upper connection part 52 of the connection member 5. That is, the upper connection part 52 in this embodiment includes an upper cylinder 523. The upper cylinder 523 includes an outer peripheral wall 524 and an inner peripheral wall 525 spaced from the outer peripheral wall 524. A slot for inserting the peripheral wall of the lower cylinder 531 is formed between the outer peripheral wall 524 and the inner peripheral wall 525. When the two are joined, they remain in a sealed state. The air guiding chamber 16 is formed by extending downward from the periphery of the self-supplementary air port 23. A one-way valve 7 is provided at the upper end of the air guiding chamber 16. The one-way valve 7 includes a second valve ball 71 and a second valve seat 72 communicated with the air supplement port 23. When the sprayer is in the downward inverted position, the second valve ball 71 closes the second valve seat 72 to prevent liquid from leaking out of the air supplement port 23. When the sprayer is in the upward upright position, the second plate body 526 constitutes the lower limit part for limiting the second valve ball 71. Through the setting of the one-way valve 7, it is possible to avoid the phenomenon that liquid leaks to the outside through the air supplement port 23 when the sprayer is in the downward inverted position. In addition to forming a sealed communication cavity 54 in cooperation with the specifically designed lower connection part 53 of the connection member 5, even if the air supplement port 23 is closed by the second valve ball 71, during the inverted use process, the air supplement port 23 may still be briefly opened during air supplement, causing the liquid entering the second valve seat 72 to leak out from the air supplement port 23. Therefore, in this embodiment, the sprayer further strengthens the anti-liquid leakage ability at the position of the air supplement port 23, such as Figure 8 , Figure 9 As shown, a supplementary air chamber 18 is further connected to the lower end of the air guiding chamber 16. The supplementary air chamber 18 includes an upper part 181 and a lower part 182 that are joined together. Among them, the upper part 181 extends downward with two first annular wall portions 183, which are sequentially spaced apart from the center to the periphery. The lower part 182 also extends upward with two second annular wall portions 184, and the second annular wall portions 184 are also sequentially spaced apart from the center to the periphery. Each second annular wall portion 184 is respectively inserted into the interval formed between the first annular wall portions 183, and a tortuous air flow channel 185 is formed between the adjacent first annular wall portions 183 and second annular wall portions 184. The air flow channel 185 is in fluid communication with the air guiding chamber 16 and the container. Through the special design of the supplementary air chamber, the problem of liquid leakage caused by air supplement during the inverted use of the sprayer can be skillfully solved. The principle is as follows: The supplementary air chamber 18 has a tortuous air flow channel 185 communicated with the air guiding chamber 16. Even if liquid enters, on the one hand, due to the relatively narrow and tortuous air flow channel 185, the liquid enters at a slower speed. And because the air flow channel 185 is relatively narrow, the gas can block the further entry of the liquid, thus avoiding the problem that the liquid may still leak to the outside through the open one-way valve 7 during the air supplement process.

[0071] Of course, for the atomizer itself, the air supplement chamber 18 is a selectable component, and the user can choose to insert and assemble it according to needs. When inserting and assembling, it only needs to be inserted to the lower end of the air guiding chamber 16. At the same time, when in use, a liquid inlet 186 similar to the "second port 432" needs to be added correspondingly. For details, please refer to Figure 3 . In addition, the air supplement chamber 18 can also be integrally arranged with the upper connection part 52 or the lower connection part 53. Therefore, actually when the air supplement chamber 18 is provided, a lower limit part for limiting the second valve ball 71 is formed inside. The air supplement chamber 18 in this embodiment can actually be integrally arranged with the upper cylinder body 523 according to actual needs. Therefore, the corresponding part A of the first ring wall part 183 for limiting the second valve seat 72 on the air supplement chamber 18 can also be regarded as the second plate body 526. Finally, in order to provide more circuitous space for the liquid to rise in the air supplement chamber 18 and prevent the liquid in the container from entering the air supplement port 23 too quickly, the specific structure is set to be relatively large. Refer to Figure 8 and 9 As shown, central holes 180 for the second pipe body 534 to pass through are respectively provided at the centers of the upper part 181 and the lower part 182 of the air supplement chamber.

[0072] In addition, it is not only possible for the liquid to leak through the air inlet 23, but also possible for it to drip through the nozzle part 12. As described above, the water outlet channel 13 communicates with the water inlet chamber 14 through the cylinder part 2, and the first valve structure 3 is arranged at the connection between the cylinder part 2 and the water inlet chamber 14. An outlet rod 81 communicating with the nozzle part 12 is arranged in the water outlet channel 13. A water passage 82 communicating with the cylinder part 2 is arranged in the outlet rod 81, and the water outlet level of the water passage 82 is lower than that of the nozzle part 12. A water passage hole 83 communicating with the water passage 82 is arranged at the end of the outlet rod 81, and an elastic plugging member 84 is arranged at the end of the pipeline of the water outlet channel 13. The plugging member 84 always closes the water passage hole 83 in the natural state. When the hydraulic pressure in the water outlet channel 13 reaches the preset pressure of the plugging member 84, the plugging member 84 is forced to open, allowing the liquid to pass through the water passage hole 83. Since the plugging member 84 needs to have elasticity, its structure is an elastic body in the shape of a cylinder. The closed end is used to plug the water passage hole 83, and the open tail abuts against the bottom end of the water outlet channel 13, enabling it to switch between opening and closing the water passage hole 83. The water passage 82 in the outlet rod 81 is a first flow channel 821 arranged parallel to the axial direction of the outlet rod 81, a second flow channel 822 connected to the first flow channel 821 and arranged perpendicular to the axial direction of the outlet rod 81, and a third flow channel 823 communicating with the second flow channel 822 and arranged in the gap between the outlet rod 81 and the water outlet channel 13. The water outlet level of the water passage 82 is lower than that of the nozzle part 12, effectively solving the problem of liquid dripping from the nozzle part 12 after spraying. The reason is that the third flow channel 823 is always below the nozzle part 12. According to the natural law of "water flowing to lower places", even if there is unsprayed liquid left in the water passage 82, it will not flow into the nozzle part 12 located at a higher place. On the other hand, the setting of the elastic plugging member 84 enables the plugging member 84 to always close the water passage hole 83 in the natural state, thus preventing the liquid from leaking out of the nozzle part 12. In addition, due to its elastic property, the plugging member 84 also has the function of "energy storage", enabling the liquid to have a faster spraying speed when spraying from the water outlet channel 13, which is also beneficial for users with poor grip strength such as children or the elderly.

[0073] In summary, the process of spraying of the sprayer in this embodiment is as follows: First, the user can select the nozzle part 12 with a mesh structure according to whether foam needs to be generated, and then, according to the usage requirements, select the corresponding indication icon of the connector on the nozzle part 12 for spraying or closing, and adjust the rotation angle of the connector. If the user needs to spray the sprayer in an upright mode, press the liquid on the wrench 22, and the first valve structure 3 is forced to open. The liquid enters the cylinder part 2 from the container through the inlet pipe 11, the second cavity 542, and the water inlet chamber 14 (as Figure 11 、 12As shown, using the reduced pressure generated in the cylinder part 2 as the driving force, the liquid is driven to enter the cylinder part 2 from the fluid - connected container until it reaches a fixed quantity. The liquid in the cylinder part 2 instantaneously presses against the first valve structure 3, which can effectively prevent the liquid from flowing back towards the container. When the wrench 22 is pressed again, due to the incompressibility of the liquid, the liquid sprays out towards the nozzle part 12 through the water - passing channel 82 of the water outlet rod 81;

[0074] If the user needs to use the sprayer in an inverted mode for spraying, which has a different flow path from the upright mode, when pressing the liquid on the wrench 22, the liquid inlet process of the cylinder part 2 is as follows: The liquid flows from the first gap 61 and the second gap 62 to the communication cavity 54, and then through the third gap 63 and the fourth gap 64 to the water inlet chamber 14, and then enters the inner cavity of the cylinder part 2. In this way, continuous actuation sucks the liquid from the water inlet chamber 14 into the cylinder part 2. Whether in an inverted or upright use state, once the cylinder part 2 is filled with liquid, further actuation can push the liquid into the water outlet channel 13. That is, the process of spraying the liquid by pressing the wrench 22 again is the same as when the sprayer is in an upright position. At this time, the outside air communicates with the container through the air - supplementing port 23 to achieve air - pressure balance. When the wrench 22 is no longer pressed, the wrench 22 resets under the reset action of an elastic member such as a plastic spring arranged outside the cylinder part 2. At this time, the piston 21 can return to its original position, and the blocking member 84 re - blocks the water - passing hole 83, thereby refilling the liquid in the container into the cylinder part 2 (at this time, the skirt corresponding to the first valve structure 3 opens); Figures 11 - 14 The dotted arrows shown indicate the flow path of the liquid. And in order to make the flow path in the figure clearer, the air - supplementing chamber 18 and the second valve ball 71 are omitted. For example Figure 11 the dotted arrow indicates how the liquid is sucked out of the container through the inlet pipe 11 and enters the cylinder part 2.

[0075] If the user chooses to install an air - supplementing chamber 18 on the inlet pipe 11, after pressing the wrench 22, the outside air supplements air to the container through the air - supplementing port 23 via the air - supplementing chamber 18. When the wrench 22 is no longer pressed, the liquid in the container will flow back along the air - supplementing chamber 18. However, due to the limitation of the tortuous air - flow channel 185, the liquid in the container can enter the air - supplementing chamber 18 slowly and gently, avoiding the liquid flowing directly out of the air - supplementing port 23.

[0076] Embodiment 2

[0077] As Figures 15 - 16 shown, it is basically the same as the structure of Embodiment 1. The main difference is that: in this embodiment, there is no air - supplementing chamber 18. Therefore, as Figure 16As shown, the outer peripheral wall 524 of the upper cylinder body 523 of the upper connection part 52 extends downward into the air guiding chamber 16 with a second plate body 526. The second plate body 526 has the function of "serving two purposes with one object", that is, it also has the limiting function of restricting the downward movement of the second valve ball 71. The second plate body 526 replaces the corresponding part A that plays a limiting role in the air supplement chamber 18. For the specific corresponding part A, reference can be made to that in Embodiment 1 Figure 3 As Figures 17 - 20 shown is a schematic diagram of the state of the sprayer in different states in this embodiment. The dotted arrows shown indicate the flow path of the liquid.

[0078] Embodiment 3

[0079] As Figure 21 shown, it is basically the same as the structure of Embodiment 1. The differences are mainly as follows: In this embodiment, there is no air supplement chamber 18, and a metal spring arranged inside the cylinder part 2 is used to replace the plastic spring arranged outside the cylinder part 2. The valve rod 9 is used to replace the water outlet rod 81. At the same time, the structural position of the first valve structure 3 also changes, that is, the water outlet channel 13 is directly communicated with the water inlet chamber 14, and the first valve structure 3 is arranged at the rear end of the water outlet channel 13, including a third valve seat 31 communicated with the water inlet chamber 14 and a third valve ball 32 arranged on the front side of the third valve seat 31. When the liquid enters the water inlet chamber 14, the third valve ball 32 is forced to open so that the water outlet channel 13 and the nozzle part 12 are in fluid communication, and the liquid flows out from the nozzle part 12. Compared with the structure of Embodiment 1, this scheme is simpler in the operation of installing the third valve ball 32 and the valve rod 9.

[0080] Embodiment 4

[0081] As Figure 22 shown, it is basically the same as the structure of Embodiment 3. The difference is that the cross-section of the valve rod 9 is divided into a narrowing section 91 and an expanding section 92 along the water outlet direction. A flow gap for the liquid to flow out is formed between the narrowing section 91 and the water outlet channel 13, and a blocking valve 93 for closing the nozzle part 12 after the liquid spraying ends is arranged in the expanding section 92. A space for the third valve ball 32 to roll is left between the end of the narrowing section 91 of the valve rod 8 and the third valve ball 32. This space is the space for the third valve ball 32 to open and close.

[0082] Embodiment 5

[0083] As Figure 23As shown, it is basically the same as the structure of Embodiment 1, except that it further includes a connecting member B. The connecting member B is provided to prevent liquid from leaking at the connection between the main body 1 and the threaded collar 15. The main body 1 is independently connected to the threaded collar 15 by means of the connecting member B. The connecting member B has an upper section 1b for connecting to the main body 1 and a lower section 2b for connecting to the threaded collar 15. The main body 1 can rotate relative to the upper section 1b in a sealed manner, while the threaded collar 15 maintains a static sealed fit with the lower section 2b.

Claims

1. A sprayer that can be used to suck and spray the liquid in a container, comprising a main body (1), and an inlet pipe (11) for introducing the liquid in the container and a nozzle part (12) for spraying the liquid are provided on the main body (1), and further comprising: A cylinder part (2) that can be in fluid communication with the inlet pipe (11) and store the liquid; A piston (21) that is reciprocally movably arranged at the outer end of the cylinder part (2) and is used to form a sealed inner cavity of the cylinder part (2); A wrench (22) is arranged on one side of the piston (21) and is used to push the piston (21) backward from the front to the cylinder part (2); It is characterized in that: A first valve structure (3) is provided on the water outlet channel (13) between the cylinder part (2) and the nozzle part (12), and the first valve structure (3) is configured to always close the flow path between the inlet pipe (11) and the cylinder part (2) under the pressure of the liquid in the cylinder part (2). When the wrench (22) triggers the piston (21) to press, so that the hydraulic pressure in the cylinder part (2) exceeds the preset pressure of the first valve structure (3), the first valve structure (3) is opened and the liquid in the cylinder part (2) is sprayed out from the nozzle part (12); The upper end of the inlet pipe (11) is further equipped with a switching valve (4), and the switching valve (4) includes a first valve seat (41), a first valve ball (42) and at least two inverted liquid pumping ports (43) formed in the first valve seat (41), enabling the sprayer to operate in an upright mode or an inverted mode.

2. The sprayer according to claim 1, characterized in that: The switching valve (4) is constructed on a connecting member (5), and the connecting member (5) is used to detachably connect and position at the upper end of the inlet pipe (11), and the connecting member (5) includes a socket (51) into which the upper end of the inlet pipe (11) can be inserted.

3. The sprayer according to claim 2, characterized in that: An inlet water chamber (14) communicating with the switching valve (4) is provided in the rear part of the cylinder part (2) in the main body (1), and the inlet water chamber (14) communicates with the water outlet channel (13) or communicates with the cylinder part (2). Correspondingly, the connecting member (5) includes an upper connecting part (52) located in the lower section of the main body (1) and a lower connecting part (53) located in the threaded collar (15) of the container, wherein: The upper connecting portion (52) constitutes the first valve seat (41) of the switching valve (4) and a connecting pipe (521) arranged side by side and spaced apart from the first valve seat (41). The connecting pipe (521) is embedded in the water inlet chamber (14). The lower connecting portion (53) includes a communicating chamber (54) formed by being aligned with the upper connecting portion (52). The communicating chamber (54), the first valve seat (41), and the connecting pipe (521) are in fluid communication with the water inlet chamber (14) and the inlet pipe (11). The inverted liquid pumping port (43) includes a first port (431) provided on the first valve seat (41). The switching valve (4) is arranged such that when the sprayer is in the upright upward position, the first port (431) is closed, and when the sprayer is in the inverted downward position, the first port (431) is opened so that liquid can flow from the container to the water inlet chamber (14).

4. The sprayer according to claim 3, wherein: The inverted liquid pumping port (43) includes a second port (432) provided on the upper connecting portion (52). The second port (432) is located on the front side of the socket (51). An air supplement port (23) for supplementing external air into the container is provided on the cylinder portion (2). An air guiding chamber (16) communicating with the air supplement port (23) is provided on the main body (1). The lower part of the air guiding chamber (16) faces the second port (432) and leaves a first gap (61). A closing seat (17) that opens downward and is used to close the first valve seat (41) is provided on the main body (1). A second gap (62) communicating with the first gap (61) is formed between the closing seat (17) and the first valve seat (41). When the sprayer is in the inverted downward position, the first port (431) is opened so that liquid can flow from the second port (432) to the water inlet chamber (14) through the first gap (61) and the second gap (62).

5. The sprayer according to claim 4, characterized in that: The lower connecting portion (53) includes a lower cylinder (531). The center of the bottom of the lower cylinder (531) has an inlet (532) communicating with the inlet pipe (11) for liquid to flow in. A first pipe body (533) extends upward from the periphery of the inlet (532), and a second pipe body (534) extends downward. The second pipe body (534) constitutes the socket (51). The first pipe body (533) correspondingly locates in the spacing portion (522) between the first valve seat (41) and the connecting pipe (521). The upper end of the first pipe body (533) leaves a third gap (63) from the spacing portion (522). A blocking member (55) is provided on the front side of the first pipe body (533). When the sprayer is in the upright upward position, the blocking member (55) is used to block the flow of the liquid flowing out through the third gap (63) to the first valve seat (41).

6. The sprayer according to claim 5, characterized in that: The blocking member (55) includes a first plate body (551). The top of the first plate body (551) is higher than the upper end of the first tube body (533), and the length of the first plate body (551) is greater than the outer edge of the bottom of the first valve seat (41). The top of the first plate body (551) abuts against the outer edge of the bottom of the first valve seat (41). The first plate body (551) divides the internal space of the communication cavity (54) into a first cavity (541) corresponding to the first port (431) and a second cavity (542) corresponding to the connecting pipe (521) in sequence from front to back. A fourth gap (64) is left between the peripheral edge of the first plate body (551) and the peripheral wall of the lower cylinder body (531). When the sprayer is in the downward inverted position, the liquid flows from the second cavity (542) through the fourth gap (64) and the third gap (63) into the first cavity (541) and then enters the water inlet chamber (14).

7. The sprayer according to claim 6, characterized in that: The upper connecting part (52) includes an upper cylinder body (523). The upper cylinder body (523) includes an outer peripheral wall (524) and an inner peripheral wall (525) spaced from the outer peripheral wall (524). A slot for inserting the peripheral wall of the lower cylinder body (531) is formed between the outer peripheral wall (524) and the inner peripheral wall (525), and a sealed state is maintained when they are joined. The upper cylinder body (523) further extends a second plate body (526) downward to the lower part of the air guiding chamber (16). The air guiding chamber (16) is formed by extending downward from the periphery of the air supplement port (23). A one-way valve (7) is arranged at the upper end of the air guiding chamber (16). The one-way valve (7) includes a second valve ball (71) and a second valve seat (72) communicated with the air supplement port (23). When the sprayer is in the downward inverted position, the second valve ball (71) closes the second valve seat (72) to prevent the liquid from leaking out of the air supplement port (23). When the sprayer is in the upward upright position, the second plate body (526) constitutes a lower limit part for limiting the second valve ball (71).

8. The sprayer according to any one of claims 5 to 7, characterized in that: The lower end of the air guiding chamber (16) is further connected with an air supplement chamber (18). The air supplement chamber (18) includes an upper part (181) and a lower part (182) which are joined. Among them, the upper part (181) extends downward with at least two first annular wall parts (183), which are sequentially and spaced apart from the center to the periphery. The lower part (182) extends upward with at least two second annular wall parts (184), and the second annular wall parts (184) are also sequentially and spaced apart from the center to the periphery. Each of the second annular wall parts (184) is inserted into the interval formed between the first annular wall parts (183). A tortuous air flow channel (185) is formed between the adjacent first annular wall parts (183) and the second annular wall parts (184). The air flow channel (185) is in fluid communication with the air guiding chamber (16) and the container.

9. The sprayer according to any one of claims 3 to 7, characterized in that: The water outlet channel (13) is directly communicated with the water inlet chamber (14), and the first valve structure (3) is arranged at the rear end of the water outlet channel (13), including a third valve seat (31) communicated with the water inlet chamber (14) and a third valve ball (32) arranged on the front side of the third valve seat (31). When the water inlet chamber (14) is filled with liquid, the third valve ball (32) is forced to open so that the water outlet channel (13) and the nozzle portion (12) are in fluid communication.

10. The sprayer according to any one of claims 3 to 7, characterized in that: The water outlet channel (13) is communicated with the water inlet chamber (14) through the cylinder portion (2). The first valve structure (3) is arranged at the connection between the cylinder portion (2) and the water inlet chamber (14). A water outlet rod (81) communicated with the nozzle portion (12) is arranged in the water outlet channel (13). A water passing channel (82) communicated with the cylinder portion (2) is arranged in the water outlet rod (81). The water outlet level of the water passing channel (82) is lower than that of the nozzle portion (12). A water passing hole (83) communicated with the water passing channel (82) is arranged at the end of the water outlet rod (81). An elastic plugging member (84) is arranged at the pipe end of the water outlet channel (13). The plugging member (84) always closes the water passing hole (83) in the natural state. When the hydraulic pressure in the water outlet channel (13) reaches the preset pressure of the plugging member (84), the plugging member (84) is forced to open and the liquid passes through the water passing hole (83).

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