Liquid spray device

Abstract

To provide a liquid spray device which does not need to store a herbicide agent and the like at a predefined concentration in a tank, and which can mix a large amount of the herbicide agent and the like by changing the concentration thereof during mixed liquid spray.SOLUTION: The present invention includes: a first liquid pressure source 1; a second liquid container 2 for storing a second liquid L2; a nozzle 3; a first flow path 11 connecting the first liquid pressure source 1 and the nozzle 3; a branch 4 of the first flow path 11; a second flow path 12 connecting the branch 4 and the second liquid container 2; a confluent part 5 between the branch 4 and the nozzle 3; a third flow path 13 connecting the second liquid container 2 and the confluent part 5; and a variable flow rate adjustment valve 6 provided to the second flow path 12 or the third flow path 13. The second liquid container 2 includes a second liquid storage chamber 21 and a first liquid storage chamber 22. When the first liquid L1 flows into the first liquid storage chamber 22, the second liquid storage chamber 21 is compressed to press the second liquid L2 out into the third flow path 13 and bring into confluence with the first liquid L1 at the confluent part 5 to form a mixed liquid which is sprayed out from the nozzle 3. The flow rate of the second liquid confluent with the first liquid is adjusted by the variable flow rate adjustment valve 6.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a liquid dispensing device. [Background technology]

[0002] In recent years, interest in agriculture has been growing among young people and people with no previous agricultural experience due to the increase in self-sufficiency rates and the boom in people moving to rural areas. In addition, the agricultural workforce is aging, and there is a demand for convenient agricultural equipment. One such device is a liquid spraying device. A liquid spraying device sprays a herbicide that has already been diluted to a suitable concentration on the target object. However, the target object is not limited to one. When spraying a herbicide that has been diluted to a suitable concentration for common weeds, it is necessary to increase the concentration of the herbicide for stubborn perennial weeds growing next to them, such as horsetail, but once the mixture is mixed, the concentration cannot be changed until spraying is complete. Also, the tank containing the mixed liquid needs to be cleaned after use.

[0003] In order to solve such problems, a chemical mixing sprinkler has been proposed in which fine chemical mixing pores are provided in a chemical container attached to a chemical mixing tube connected to a hose, the chemical liquid stored in the chemical container is sucked up by a water flow guided from the hose, and minute amounts are continuously mixed into the water flow from the chemical mixing tube, and then water is sprayed from the tip of the chemical mixing tube (see Patent Document 1). This chemical-mixing sprinkler is advantageous in that it does not require mixing the chemical with the water in advance. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 7-87873 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in a sprayer such as that in Patent Document 1, minute chemical-mixing pores are provided in a chemical container, and the chemical liquid contained in the chemical container is sucked up by a water flow guided by a hose, and is continuously mixed into the water flow in small amounts from a chemical-mixing tube, making it difficult to mix a large amount of chemical liquid.

[0006] Therefore, the present invention aims to provide a liquid spraying device that does not require the preparation of a predetermined concentration of chemical liquid such as herbicide, pesticide, etc. in advance and stores it in a tank, and that makes it possible to change the concentration of the mixed liquid or mix large amounts of chemical liquid, etc. while spraying it. [Means for solving the problem]

[0007] [1] A liquid spraying device according to one aspect of the present invention comprises: the nozzle; a branch (branch portion) of the first flow path; a second flow path connecting the branch and the second liquid container; a junction portion provided between the branch of the first flow path and the nozzle; a third flow path connecting the second liquid container and the junction portion; and a variable flow rate adjustment valve provided in at least one of the second flow path and the third flow path, capable of adjusting a flow rate including opening and closing the flow path; the second liquid container has a second liquid storage chamber connected to the third flow path and having a variable volume for storing the second liquid, and a first liquid storage chamber connected to the second flow path and for storing the first liquid flowing in from the second flow path, When the first liquid branches at the branch and flows into the first liquid storage chamber through the second flow path, it presses the second liquid storage chamber and pushes the second liquid stored in the second liquid storage chamber into the third flow path, and the pushed-out second liquid joins with the first liquid at the junction to form a mixed liquid, and the mixed liquid is sprayed from the nozzle, The flow rate of the second liquid that merges with the first liquid at the merging portion is adjusted by the variable flow rate adjustment valve. It is structured as follows.

[0008] According to this liquid spraying device, the first liquid is supplied from a first liquid pressurized source, the second liquid is contained in a second liquid container, and the two are mixed in the first flow path (confluence), so there is no need to prepare herbicides, pesticides, or other chemical liquids at a predetermined concentration and store them in a tank in advance.

[0009] In addition, since the mixing ratio of the first liquid and the second liquid is controlled by a variable flow rate adjustment valve provided in at least one of the second flow path and the third flow path, it is possible to change the concentration of the mixed liquid while it is being sprayed.

[0010] The second liquid container has a second liquid storage chamber connected to the third flow path and having a variable volume for storing the second liquid, and a first liquid storage chamber connected to the second flow path and storing the first liquid flowing in from the second flow path, and when the first liquid branches off at the branch and flows into the first liquid storage chamber through the second flow path, it presses the second liquid storage chamber and pushes the second liquid stored in the second liquid storage chamber into the third flow path, and the pushed-out second liquid joins and mixes with the first liquid at the joining part and is sprayed from the nozzle. Therefore, unlike a chemical liquid mixing sprinkler in which a fine chemical liquid mixing pore is provided in a chemical liquid container and a water flow guided by a hose continuously mixes the chemical liquid into the water flow in small amounts as in Patent Document 1, it is also possible to mix a large amount of chemical liquid, etc.

[0011] Therefore, with this liquid spraying device, it is not necessary to prepare a predetermined concentration of chemical liquid such as herbicide, pesticide, etc. and store it in a tank in advance, and it is possible to provide a liquid spraying device that can change the concentration during spraying of the mixed liquid and mix large amounts of chemical liquid, etc. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a mechanism diagram for explaining a liquid spraying device 10 according to a first embodiment. [Diagram 2] FIG. 2 is a structural schematic diagram shown for explaining the structure of the liquid spraying device 10 according to the first embodiment. [Diagram 3] FIG. 2 is a structural schematic diagram for explaining a first state of the liquid spraying device 10 according to the first embodiment. [Figure 4]FIG. 4 is a structural schematic diagram for explaining a second state of the liquid spraying device 10 according to the first embodiment. [Diagram 5] FIG. 4 is a structural schematic diagram shown for explaining a third state of the liquid spraying device 10 according to the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] A liquid spraying device according to one aspect of the present invention will be described below with reference to the drawings. Each drawing is a schematic diagram and does not necessarily strictly reflect the actual structure, size, length, shape, liquid flow, etc. Each embodiment does not limit the scope of the claims. Not all of the elements and combinations thereof described in each embodiment are essential to the present invention. The same reference numerals are used across embodiments for components that can be considered to be substantially equivalent, and repeated explanations may be omitted (some explanations may be duplicated).

[0014] [Embodiment 1] [Liquid spraying device 10] Fig. 1 is a mechanism diagram shown to explain the liquid spraying device 10 according to the first embodiment, and Fig. 2 is a structural schematic diagram shown to explain the structure. Fig. 3 is a structural schematic diagram shown to explain the first state, Fig. 4 is a structural schematic diagram shown to explain the second state, and Fig. 5 is a structural schematic diagram shown to explain the third state.

[0015] As shown in Figures 1 and 2, the liquid spraying device 10 of embodiment 1 comprises a first liquid pressurization source 1 that pressurizes and flows the first liquid L1, a second liquid container 2 that contains the second liquid L2, a nozzle 3, a first flow path 11 connecting the first liquid pressurization source 1 and the nozzle 3, a branch 4 (branching section) of the first flow path 11, a second flow path 12 connecting the branch 4 and the second liquid container 2, a junction section 5 provided between the branch 4 of the first flow path 11 and the nozzle 3, a third flow path 13 connecting the second liquid container 2 and the junction section 5, and a variable flow rate regulating valve 6 provided in at least one of the second flow path 12 and the third flow path 13 and capable of regulating the flow rate, including opening and closing the flow path.

[0016] The second liquid container 2 has a second liquid storage chamber 21 connected to the third flow path 13 and having a variable volume for storing the second liquid L2, and a first liquid storage chamber 22 connected to the second flow path 12 and for storing the first liquid L1 flowing in from the second flow path 12.

[0017] When the first liquid L1 branches at branch 4 and flows through the second flow path 12 into the first liquid storage chamber 22, it presses against the second liquid storage chamber 21, pushing the second liquid L2 contained in the second liquid storage chamber 21 into the third flow path 13, and the pushed-out second liquid L2 merges with the first liquid L1 at the confluence 5 to form a mixed liquid, and the mixed liquid is sprayed from the nozzle 3.

[0018] The flow rate of the second liquid L2 that joins with the first liquid L1 at the joining portion 5 is adjusted by a variable flow rate adjustment valve 6. The liquid dispersing device 10 is constructed in this manner.

[0019] [1st liquid L1, 2nd liquid L2] The combination of the first liquid L1 and the second liquid L2 is, for example, a combination of a diluting liquid and a liquid to be diluted, a pesticide and a pesticide dilution (e.g., water), a herbicide and a herbicide dilution (e.g., water), etc. In the first embodiment, the combination is a herbicide and a herbicide dilution (water).

[0020] [First liquid pressure source 1] As the first liquid pressurization source 1, for example, a power spray type, an electric type, an accumulator type tank, or a water supply with water pressure may be used. Any means may be used to pressurize the first liquid L1. In other words, it does not depend on the type of pressure source. In the first embodiment, a pressure accumulator tank is used as the first liquid pressurization source 1.

[0021] [Variable flow control valve 6, etc.] The variable flow rate adjustment valve 6 is a valve that variably adjusts the flow rate. For example, it is configured with a needle valve. When the target of spraying the herbicide changes during spraying, for example, when spraying a herbicide in an area where horsetails are growing, and you want to spray the herbicide on plants other than horsetail growing next to it, the variable flow rate adjustment valve 6 is operated to change the flow rate of the second liquid L2 flowing through the third flow path 13. This changes the mixing ratio with the first liquid L1 at the junction 5.

[0022] In the first embodiment, in addition to the variable flow rate control valve 6, a fixed flow rate control valve 62 is used to adjust the flow rate. The fixed flow rate control valve 62 is a valve that can adjust the flow rate, but after adjusting the flow rate before spraying the chemical solution, in principle, it is a valve that fixes (maintains) the previously adjusted flow rate during spraying of the chemical solution. When both the variable flow rate control valve 6 and the fixed flow rate control valve 62 are used, for example, it is possible to perform rough (approximate) flow rate adjustment with the fixed flow rate control valve 62 and fine flow rate adjustment with the variable flow rate control valve 6. The fixed flow rate control valve 62 is installed on the nozzle 3 side of the variable flow rate control valve 6 or on the opposite side thereof.

[0023] [Check valve] A check valve 81 (non-return valve, backflow prevention valve) is provided in the first flow path 11 (between the junction 5 and the second three-way valve 42 in embodiment 1) and is used to prevent backflow of the first liquid L1 in the direction of the first liquid pressurization source 1.

[0024] In the liquid dispensing device 10, the branch 4 comprises a first three-way valve 41. The liquid spraying device 10 further includes a fourth flow path 14 connecting the first flow path 11 and the third flow path 13, a second three-way valve 42 provided at the connection portion 8 between the first flow path 11 and the fourth flow path 14, and a first stop valve 71 provided in the second liquid container 2 for opening and closing the first liquid storage chamber 22 and the space outside the second liquid container 2. Variable flow rate adjustment valve 6 is provided between a connecting portion 8 of fourth flow path 14 with third flow path 13 and junction portion 5 .

[0025] [Three-way valve] A three-way valve is a valve that has three inlets and outlets for fluid, that is, three connection ports for piping. For example, it is a ball valve with three flow paths, a directional control valve with three ports, etc. In the first embodiment, the three-way valve is configured as a three-way ball valve. This is a valve that can change the flow direction by opening and closing the ports by rotating the ball by 90 degrees, 180 degrees, 270 degrees, etc.

[0026] In the liquid spraying device 10, the second liquid container 2 has a double structure in which the second liquid storage chamber 21 is provided inside the first liquid storage chamber 22. At least a part of the second liquid storage chamber 21 is flexible. When the first liquid L1 flows from the second flow path 12 into the first liquid storage chamber 22, the second liquid storage chamber 21 contracts, and pushes the second liquid L2 from the second liquid storage chamber 21 to the third flow path 13. For example, the inner wall 2b of the first liquid storage chamber 22 (the outer wall of the second liquid storage chamber 21) is made softer than the outer wall 2a of the first liquid storage chamber 22.

[0027] The liquid spraying device 10 is configured to be capable of taking at least one of the following states: (1) a first state, (2) a second state, and (3) a third state. In other words, the liquid spraying device 10 is configured to be capable of taking any of the first state and the second state, the first state and the third state, and the first state, the second state, and the third state.

[0028] These will be described with reference to FIGS. In the drawings, the flow directions of the first liquid L1, the second liquid L2, etc. are shown by arrows. Also, arrows indicating the direction of rotation are shown around the valve. These indicate the direction of rotation of the valve based on the state of the valve shown in Figure 2. These arrows are provided for the convenience of explanation, and do not necessarily mean that the valve prior to the state shown in Figure 3, Figure 4 or Figure 5 is in the rotational position shown in Figure 2.

[0029] [First state of (1)] FIG. 3 is a structural schematic diagram shown for explaining the first state, and will be explained with reference to symbols. (1) The first three-way valve 41 is opened and closed so that the first liquid L1 from the first liquid pressurization source 1 flows in the direction of the nozzle 3 and in the direction of the second flow path, and the second three-way valve 42 is opened and closed so that the first liquid L1 flowing from the first three-way valve 41 flows in the direction of the nozzle 3 and does not flow in the direction of the fourth flow path 14, and the first stop valve 71 is closed and the variable flow rate adjustment valve 6 is opened, so that the first liquid L1 coming out of the first liquid pressurization source 1 is branched by the first three-way valve 41 in the direction of the first flow path 11 and the direction of the second flow path 12. The first liquid L1 branched in the direction of the first flow path 11 flows toward the junction 5 via the second three-way valve 42, and the first liquid L1 branched in the direction of the second flow path 12 flows into the first liquid storage chamber 22 and compresses the second liquid storage chamber 21, pushing the second liquid L2 stored in the second liquid storage chamber 21 into the third flow path 13 and flowing in the direction of the junction 5, and the pushed-out second liquid L2 merges with the first liquid L1 at the junction 5 to form a mixed liquid, and the mixed liquid is sprayed from the nozzle 3. This is a first state.

[0030] [Second state of (2)] FIG. 4 is a structural schematic diagram shown for explaining the second state, and will be explained with reference to the symbols. (2) A second state in which the first three-way valve 41 is opened and closed so that the first liquid L1 from the first liquid pressurization source 1 flows in the direction of the nozzle 3 but does not flow in the direction of the second flow path 12, the second three-way valve 42 is opened and closed so that the first liquid L1 flowing from the first three-way valve 41 flows in the direction of the fourth flow path 14 but does not flow in the direction of the nozzle 3, and the variable flow rate adjustment valve 6 is closed, whereby the first liquid L1 leaving the first liquid pressurization source 1 flows into the second liquid storage chamber 21 via the branch 4, the first flow path 11, the second three-way valve 42, the fourth flow path 14, and the third flow path 13, expanding the second liquid storage chamber 21, and the first liquid L1 in the first liquid storage chamber 22 is discharged to the outside from the first stop valve 71, which is opened.

[0031] [Third state of (3)] FIG. 5 is a structural schematic diagram shown for explaining the third state, and will be explained with reference to the symbols. (3) The first three-way valve 41 is opened and closed so that the first liquid L1 from the first liquid pressurization source 1 flows in the direction of the nozzle 3 and does not flow in the direction of the second flow path, the second three-way valve 42 is opened and closed so that the first liquid L1 flowing from the first three-way valve 41 flows in the direction of the nozzle 3 and does not flow in the direction of the fourth flow path 14, and the variable flow rate adjustment valve 6 is closed, thereby blocking the flow path of the second liquid L2 from the second liquid container 2 to the junction 5 via the third flow path 13 and the variable flow rate adjustment valve 6, and the first liquid L1 coming out of the first liquid pressurization source 1 flows in the direction of the first flow path 11 by the first three-way valve 41 and flows in the direction of the junction 5 via the second three-way valve 42, and is sprayed from the nozzle 3 alone (only the first liquid) without merging with the second liquid L2 at the junction 5.

[0032] In addition, the liquid spraying device 10 may be configured such that the second liquid storage chamber 21 is cleaned with the first liquid L1 by repeating (controlling) the first state (1) and the second state (2) by a control device that controls the liquid spraying device 10 to take at least a first state (1) and a second state (2).

[0033] [Control device] The control device (not shown) is composed of a logic circuit, a microcomputer, etc., and controls the opening and closing of the first stop valve 71, the second stop valve 72, the first three-way valve 41, the second three-way valve 42, the variable flow control valve 6, the fixed flow control valve 62, the check valve 81, etc., adjustment of the cross-sectional area of ​​the opening and closing path (flow rate adjustment), change of flow path, etc. These valves can also be opened and closed, adjusted, and the flow path changed manually. The microcomputer is an ultra-small computer mainly composed of a CPU (Central Processing Unit) (ROM, RAM) and input / output devices, etc. When a command is entered from an input device (such as a button switch), the valves are opened and closed according to commands previously stored in the ROM.

[0034] Such a controller may control the valves to cause the liquid dispensing device 10 to be in a first state, a second state, or a third state. As described above, the control may be performed to take at least one of the first state, the second state, and the third state. That is, the control may be performed to take any one of the first state and the second state, the first state and the third state, or the first state, the second state, and the third state.

[0035] As shown in FIG. 1, in the liquid spraying device 10, the first liquid pressurization source 1 is configured as an accumulator tank, a second stop valve 72 is further provided in the first flow path 11 between the first liquid pressurization source 1 and the first three-way valve 41, and a pipe (e.g., a substantially straight, rigid pipe) is provided in the first flow path 11 between the nozzle 3 and the second stop valve 72, and a variable flow rate adjustment valve 6 is provided in the vicinity of the pipe.

[0036] [Second stop valve 72] The second stop valve 72 is configured as, for example, a lever-type stop valve that opens and closes the valve using a lever. By operating the lever manually (or with a control device), the first liquid L1 is allowed to flow from the first liquid pressure source 1 to the first flow path 11 (or the branch 4 to the first three-way valve 41) or the flow is blocked, opening and closing.

[0037] [Effects of the First Embodiment] According to the liquid spraying device 10 of embodiment 1, the first liquid L1 is supplied from the first liquid pressurization source 1, and the second liquid L2 is contained in the second liquid container 2, and the two are mixed in the first flow path 11 (junction 5), so there is no need to prepare pesticides, etc. at a predetermined concentration and place them in a tank in advance.

[0038] In addition, the mixing ratio of the first liquid L1 and the second liquid L2 is controlled by a variable flow control valve 6 provided in at least one of the second flow path 12 and the third flow path 13, so that the concentration can be changed during spraying of the mixed liquid.

[0039] The second liquid container 2 has a second liquid storage chamber 21 whose volume is variable, and a first liquid storage chamber 22, and is configured so that when the first liquid L1 flows into the first liquid storage chamber 22 through the second flow path 12, it presses the second liquid storage chamber 21 and pushes the second liquid L2 stored in the second liquid storage chamber 21 into the third flow path 13, and the pushed-out second liquid L2 joins and is mixed with the first liquid L1 at the joining portion 5 and is sprayed from the nozzle 3. Therefore, it is possible to mix a large amount of a medicinal liquid or the like stored in the second liquid storage chamber 21 with the first liquid L1.

[0040] Therefore, according to the liquid spraying device 10, it is not necessary to prepare a predetermined concentration of chemical liquid such as herbicide, pesticide, etc. in advance and store it in a tank, and it is possible to provide a liquid spraying device that can change the concentration during spraying of the mixed liquid and mix large amounts of chemical liquid, etc.

[0041] Furthermore, since the second liquid L2 does not mix with the first liquid L1 until it flows through the third flow path 13 and reaches the confluence 5, if it is desired to recover the second liquid L2 remaining in the second liquid storage chamber 21 after spraying the mixture of the first liquid L1 and the second liquid L2, it can be easily recovered. Furthermore, for example, when the first liquid L1 is water and the second liquid L2 is a herbicide, the second liquid L2 flows only through the third flow path 13, and the mixed liquid of the first liquid L1 and the second liquid L2 flows only between the confluence 5 and the nozzle 3, so that cleaning the flow paths through which the second liquid L2 and the mixed liquid flow is easy. Furthermore, as the first liquid pressurization source 1, any pressurization source can be used.

[0042] In the liquid spraying device 10, the branch 4 is constituted by a first three-way valve 41, and further comprises a fourth flow path 14 connecting the first flow path 11 and the third flow path 13, a second three-way valve 42 provided at the connection 8 of the first flow path 11 with the fourth flow path 14, and a first stop valve 71 provided in the second liquid container 2 for opening and closing the first liquid storage chamber 22 and the space outside the second liquid container 2, and a variable flow rate control valve 6 is provided between the connection 8 of the fourth flow path 14 with the third flow path 13 and the confluence 5, making it possible to perform a variety of functions despite a simple configuration. For example, it is possible to spray a mixed liquid of the first liquid L1 and the second liquid L2 (see the first state in Figure 3), to discharge the first liquid L1 from the first liquid storage chamber 22 (see the second state in Figure 4), and to spray the first liquid L1 alone from the nozzle 3 (see the third state in Figure 5).

[0043] Furthermore, in the liquid spraying device 10, the second liquid container 2 is made to have a double structure in which the second liquid storage chamber 21 is provided inside the first liquid storage chamber 22, and at least a portion of the second liquid storage chamber 21 (the wall constituting the second liquid storage chamber) is flexible, and when the first liquid L1 flows from the second flow path 12 into the first liquid storage chamber 22, the second liquid storage chamber 21 contracts and pushes the second liquid L2 from the second liquid storage chamber 21 to the third flow path 13, making it possible to easily construct the second liquid container 2.

[0044] Furthermore, when the liquid spraying device 10 is configured to be capable of assuming at least one of a first state (spraying a mixed liquid) and a second state (discharging the first liquid L1 from the first liquid storage chamber 22) or a third state (spraying the first liquid alone), it becomes possible, for example, in addition to spraying the mixed liquid, to discharge the first liquid L1 from the first liquid storage chamber 22 to make the first liquid storage chamber 22 nearly empty, or to spray the first liquid L1 alone rather than the mixed liquid.

[0045] Furthermore, in the liquid spraying device 10, when the first state and the second state are repeated by the control device, the second liquid storage chamber 21 is compressed and contracted in the first state, and the second liquid L2 is discharged from the second liquid storage chamber 21, and the second state weakens the compression on the second liquid storage chamber 21, causing it to expand and then be compressed again, making it easier for the second liquid L2 to be discharged from the second liquid storage chamber 21, so that it is possible to discharge most of the second liquid L2 from the second liquid storage chamber 21, to make the second liquid storage chamber 21 nearly empty, to clean the second liquid storage chamber 21, etc. The control device can automatically set such states.

[0046] Furthermore, in the liquid spraying device 10, if the first liquid pressurization source 1 is constructed as an accumulator tank, a second stop valve 72 is further provided in the first flow path 11 between the first liquid pressurization source 1 and the first three-way valve 41, a pipe (for example, a hard, approximately straight pipe) is provided in the first flow path 11 between the nozzle 3 and the second stop valve 72, and the variable flow rate control valve 6 is provided in the vicinity of the pipe, it is possible to make the liquid spraying device 10 easy to hold, easy to operate the variable flow rate control valve 6, and compact as a whole, making it easy to carry and transport.

[0047] [Embodiment 2] A liquid sprinkling device (not shown) according to the second embodiment is basically similar to the liquid sprinkling device according to the first embodiment, but the configuration of the second liquid container 2 is different. In the second embodiment, the second liquid container 2 is a cylindrical container the inside of which is divided into two chambers by a movable partition, one of which constitutes the first liquid storage chamber 22 and the other the second liquid storage chamber 21, and which is configured so that when the first liquid L1 flows from the second flow path 12 into the first liquid storage chamber 22, the partition moves to the side of the second liquid storage chamber, pushing the second liquid L2 from the second liquid storage chamber 21 into the third flow path 13. The other configurations are similar to those of the first embodiment.

[0048] In this way, since the second liquid container 2 is a cylindrical container, it is possible to make the second liquid container 2 more resistant to damage caused by external pressure, impact, etc. In other respects, it is similar to the first embodiment, and has the same effects as the first embodiment in the similar respects.

[0049] Although the present invention has been described based on the above embodiment, the present invention is not limited to the above embodiment. It is possible to carry out the present invention in various forms without departing from the spirit of the present invention. For example, the following modifications are also possible.

[0050] (1) In the above embodiment, one second liquid container 2 was used, but multiple second liquid containers 2 may be connected in parallel, and the second flow path 12, the third flow path 13, and the first stop valve 71 may be connected in parallel to the multiple second liquid containers 2.

[0051] (2) In the above embodiment 1, the second liquid container 2 incorporating one second liquid storage chamber 21 is used, but it is also possible to use a second liquid container 2 incorporating a plurality of second liquid storage chambers 21. The plurality of second liquid storage chambers 21 are incorporated in one first liquid storage chamber 22, and each second liquid storage chamber 21 is configured to be connected to the third flow path 13. [Explanation of symbols]

[0052] 1...first liquid pressurization source, 11...first flow path, 12...second flow path, 13...third flow path, 14...fourth flow path, 2...second liquid container, 21...second liquid storage chamber, 22...first liquid storage chamber, 2a...outer shell, 2b...inner shell, 3...nozzle, 4...branch, 41...first three-way valve, 42...second three-way valve, 5...junction, 6...variable flow rate control valve, 62...fixed flow rate control valve, 71...first stop valve, 72...second stop valve, 8...connection, 81...check valve, 10...liquid spraying device, L1...first liquid, L2...second liquid

Claims

1. A liquid dispensing device comprising: the nozzle; a branch of the first flow path; a second flow path connecting the branch and the second liquid container; a junction provided between the branch of the first flow path and the nozzle; a third flow path connecting the second liquid container and the junction; and a variable flow rate adjustment valve provided in at least one of the second flow path and the third flow path, capable of adjusting a flow rate including opening and closing the flow path; the second liquid container has a second liquid storage chamber connected to the third flow path and having a variable volume for storing the second liquid, and a first liquid storage chamber connected to the second flow path and for storing the first liquid flowing in from the second flow path, When the first liquid branches at the branch and flows into the first liquid storage chamber through the second flow path, it presses the second liquid storage chamber and pushes the second liquid stored in the second liquid storage chamber into the third flow path, and the pushed-out second liquid merges with the first liquid at the junction to form a mixed liquid, and the mixed liquid is sprayed from the nozzle, A flow rate of the second liquid that merges with the first liquid at the merging portion is adjusted by the variable flow rate adjustment valve. A liquid dispersing device configured as follows.

2. 2. The liquid dispersing device according to claim 1, The branch comprises a first three-way valve; a fourth flow path connecting the first flow path and the third flow path, a second three-way valve provided at a connection portion of the first flow path with the fourth flow path, and a first stop valve provided in the second liquid container for opening and closing the first liquid storage chamber and a space outside the second liquid container, The variable flow rate adjustment valve is provided between a connection portion of the fourth flow path with the third flow path and the junction portion. Liquid spraying equipment.

3. 2. The liquid dispersing device according to claim 1, The second liquid container has a double structure in which the second liquid storage chamber is provided inside the first liquid storage chamber, and at least a portion of the wall of the second liquid storage chamber is flexible, and when the first liquid flows into the first liquid storage chamber from the second flow path, the second liquid storage chamber contracts, pushing the second liquid from the second liquid storage chamber into the third flow path.

4. 2. The liquid dispersing device according to claim 1, The second liquid container is a cylindrical container whose interior is divided into two chambers by a movable partition, one of the chambers constituting the first liquid storage chamber and the other of the chambers constituting the second liquid storage chamber, and the liquid spraying device is configured so that when the first liquid flows into the first liquid storage chamber from the second flow path, the partition moves toward the second liquid storage chamber, pushing the second liquid from the second liquid storage chamber into the third flow path.

5. The liquid spraying device according to claim 2, which is configured to be capable of taking at least one of the following states: a first state (1), a second state (2), or a third state (3). (1) A first state in which the first three-way valve is opened and closed so that the first liquid from the first liquid pressurization source flows in the direction of the nozzle and in the direction of the second flow path, the second three-way valve is opened and closed so that the first liquid flowing from the first three-way valve flows in the direction of the nozzle and does not flow in the direction of the fourth flow path, the first stop valve is closed, and the variable flow rate adjustment valve is opened, whereby the first liquid coming out of the first liquid pressurization source is branched by the first three-way valve into the direction of the first flow path and the direction of the second flow path, the first liquid branched in the direction of the first flow path flows in the direction of the junction via the second three-way valve, the first liquid branched in the direction of the second flow path flows into the first liquid storage chamber and presses the second liquid storage chamber, pushing the second liquid stored in the second liquid storage chamber into the third flow path and flows in the direction of the junction, and the pushed-out second liquid merges with the first liquid at the junction to form a mixed liquid, and the mixed liquid is sprayed from the nozzle. (2) A second state in which the first three-way valve is opened and closed so that the first liquid from the first liquid pressurization source flows in the direction of the nozzle but does not flow in the direction of the second flow path, the second three-way valve is opened and closed so that the first liquid flowing from the first three-way valve flows in the direction of the fourth flow path but does not flow in the direction of the nozzle, and the variable flow rate adjustment valve is closed, whereby the first liquid coming out of the first liquid pressurization source flows into the second liquid storage chamber via the branch, the first flow path, the second three-way valve, the fourth flow path, and the third flow path, expanding the second liquid storage chamber, and the first liquid in the first liquid storage chamber is discharged to the outside from the first stop valve which is opened. (3) A third state in which the first three-way valve is opened and closed so that the first liquid from the first liquid pressurization source flows toward the nozzle and does not flow toward the second flow path, the second three-way valve is opened and closed so that the first liquid flowing from the first three-way valve flows toward the nozzle and does not flow toward the fourth flow path, and the variable flow rate adjustment valve is closed, thereby blocking the flow path in which the second liquid flows from the second liquid container toward the junction via the third flow path and the variable flow rate adjustment valve, and the first liquid discharged from the first liquid pressurization source flows toward the first flow path by the first three-way valve and flows toward the junction via the second three-way valve, and the first liquid is sprayed alone from the nozzle without merging with the second liquid at the junction.

6. 6. The liquid dispersing device according to claim 5, A liquid spraying device configured such that the second liquid storage chamber is cleaned with the first liquid by repeating the first state of (1) and the second state of (2) using a control device that controls the liquid spraying device to take at least the first state of (1) and the second state of (2).

7. 3. The liquid dispersing device according to claim 2, The first liquid pressurization source is constituted by an accumulator tank, a second stop valve is further provided in the first flow path between the first liquid pressure source and the first three-way valve; The first flow path is formed between the nozzle and the second stop valve by a pipe, The variable flow control valve is provided near the pipe. Liquid spraying equipment.

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