Pressure accumulation type sprayer and injection method

Abstract

To provide a pressure accumulation type sprayer capable of continuously spraying without being restricted by the maximum movable width of a trigger, and a spraying method using the pressure accumulation type sprayer.SOLUTION: A pressure-accumulation sprayer A for spraying a liquid in a vessel 1 includes a base cylinder 4 for sucking the liquid from the vessel through a suction path 3, a base piston 4a sliding in the base cylinder, a reservoir cylinder 7 located downstream of the base cylinder, a reservoir piston sliding in the reservoir cylinder, a valve case 6 provided around the reservoir cylinder, a first flow path P1 communicating the base cylinder and the reservoir cylinder, a second flow path provided between the reservoir cylinder and the valve case, a first valve V1 opening and closing between the suction path and the base cylinder, a second valve V2 opening and closing between the base cylinder and the valve case, and a nozzle valve V3 sliding in the reservoir cylinder and opening and closing between the valve case and a nozzle.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a pressure-accumulation sprayer and a spraying method, and more particularly to a pressure-accumulation sprayer and a spraying method that enable continuous spraying even after the trigger is fully pulled. [Background technology]

[0002] Sprayers are widely used to spray liquids from containers, and trigger sprayers are particularly popular because they are easy to control the spray direction and to use.

[0003] Among sprayers, pressure-accumulator sprayers equipped with a first valve and a second valve are particularly useful because they can apply high pressure to the liquid to spray it into a mist continuously for a certain period of time.

[0004] For example, the pressure-accumulator sprayer of Patent Document 1 is a pressure-accumulator sprayer that includes an F valve attached to the bottom of the cylinder, a pressure-accumulator valve attached to the passage of the body, and a pressing spring that presses the pressure-accumulator valve in the valve closing direction, and sprays liquid by rotating the trigger.

[0005] In addition, the pressure-accumulating spray container in Patent Document 2 has a pump section attached to the container body, and uses a pump cylinder that slides when the operating section is operated and a valve mechanism to suck up the liquid in the container, accumulate pressure, and spray it. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6833361 [Patent Document 2] Japanese Patent Publication No. 2021-123397 Summary of the Invention [Problem to be solved by the invention]

[0007] In general pressure-accumulator sprayers, including those described in Patent Documents 1 and 2, the movement of the base piston in the cylinder is linked to the rotation of the trigger (operating part). Therefore, the maximum movable width of the trigger is directly linked to the time during which continuous spraying is possible. In other words, the time for which continuous spraying is possible is limited by the maximum movable range of the trigger. If the trigger is pulled slowly, continuous spraying for a longer period of time is possible, but if the trigger is pulled quickly, continuous spraying is not possible.

[0008] The present invention was developed in response to the above-mentioned problems. That is, the present invention aims to provide a pressure-accumulation sprayer that is capable of continuous spraying without being restricted by the maximum movable width of the trigger, and a spraying method using the pressure-accumulation sprayer. [Means for solving the problem]

[0009] After extensive research, the inventors have found that the above problem can be solved by providing a third valve, providing a first flow path and a second flow path that are opened and closed at both ends by valves, and accumulating pressure in the liquid in the first flow path and the second flow path by rotating a trigger. The present invention is based on this finding.

[0010] The present invention is a pressure accumulation type sprayer A for spraying liquid in a container 1, and includes a base cylinder 4 that sucks liquid from the container 1 through a suction passage 3, a base piston 4a that slides within the base cylinder 4, a storage cylinder 7 located downstream of the base cylinder 4, a storage piston 7a that slides within the storage cylinder 7, a valve case 6 provided around the storage cylinder 7, a first flow path P1 that connects the base cylinder 4 and the storage cylinder 7, a second flow path P2 provided between the storage cylinder 7 and the valve case 6, and a valve that opens and closes between the suction passage 3 and the base cylinder 4. The pressure-accumulating sprayer A is characterized in that it is equipped with a first valve V1, a second valve V2 that opens and closes between the basic cylinder 4 and the valve case 6, and a nozzle valve V3 that slides inside the storage cylinder 7 and opens and closes between the valve case 6 and the nozzle 8, and by rotating a trigger 5 connected to the basic piston 4a, the liquid inside the basic cylinder 4 passes through the first flow path P1, the second valve, the second flow path P2, and the third valve in that order, and is sprayed to the outside via the nozzle 8, and the liquid inside the basic cylinder 4 passes through the first flow path P1 and the second valve and fills the storage cylinder 7.

[0011] The present invention resides in the pressure-accumulation sprayer A described above, which is characterized in that a pressure spring body 9 is provided between the nozzle valve V3 and the storage piston 7a.

[0012] The present invention resides in a spraying method AA for spraying liquid in a container 1 to the outside from a nozzle 8 using the pressure-accumulation sprayer A described above, which comprises a filling step S1 for filling the liquid in the base cylinder 4 into the bottom of the storage cylinder 7 via the first flow path P1, and a spraying step S2 for spraying the liquid in the base cylinder 4 to the outside from the nozzle 8 via the first flow path P1 and the second flow path P2, characterized in that the filling step and the spraying step are carried out simultaneously.

[0013] The present invention resides in a spraying method AA in which the liquid in a container 1 is sprayed to the outside from a nozzle 8 using the pressure-accumulation sprayer A described above, characterized by sequentially carrying out a filling step S1 in which the liquid in the base cylinder 4 is filled into the bottom of the storage cylinder 7 via the first flow path P1, and a post-filling spraying step S3 in which the liquid filled at the bottom of the storage cylinder 7 is sprayed to the outside via the second flow path P2 by the spring force of the pressure spring body 9.

[0014] The present invention may also be implemented by appropriately combining the above configurations. [Effects of the Invention]

[0015] The pressure-accumulating sprayer A of the present invention is equipped with a first flow path P1 that connects the basic cylinder 4 and the storage cylinder 7, a second flow path P2 that is provided between the storage cylinder 7 and the valve case 6, a first valve V1 that opens and closes between the suction passage 3 and the basic cylinder 4, a second valve V2 that opens and closes between the basic cylinder 4 and the valve case 6, and a nozzle valve V3 that slides within the storage cylinder 7 and opens and closes between the valve case 6 and the nozzle 8. This maintains a pressure-accumulating state of liquid at multiple points in the first flow path P1 and the second flow path P2, making it possible to spray continuously from the nozzle 8 even after the trigger 5 has been fully pulled and its rotation has ceased. This allows you to spray a wider area at once, improving usability.

[0016] Furthermore, by rotating the trigger 5 connected to the basic piston 4a, the liquid in the basic cylinder 4 passes through the first flow path P1, the second valve, the second flow path P2, and the third valve in that order, and is sprayed to the outside through the nozzle 8. In addition, the liquid in the basic cylinder 4 passes through the first flow path P1 and the second valve and fills the storage cylinder 7, so that after spraying is completed, the system is ready to spray again.

[0017] The pressure-accumulation sprayer A of the present invention is provided with a pressure spring body 9 between the nozzle valve V3 and the storage piston 7a, so that the nozzle valve V3 and the storage piston 7a are simultaneously pressed by the pressure spring body 9. Therefore, as the liquid in the second flow path P2 is sprayed from the nozzle 8 and the pressure inside the second flow path P2 is reduced, the liquid in the valve case 6 is pushed out into the second flow path P2 by the pressing force generated by the pressure spring body 9, making it possible to maintain a continuous spray from the nozzle 8.

[0018] In the pressure-accumulation sprayer A of the present invention, the pressure spring body 9 is made up of a plurality of spring pieces 9a, so that adjustment of the pressure and replacement of parts can be easily performed. Therefore, the maintainability is improved.

[0019] The spraying method AA of the present invention comprises a filling step S1 in which the liquid in the base cylinder 4 is filled into the bottom of the storage cylinder 7 via the first flow path P1, and a spraying step S2 in which the liquid in the base cylinder 4 is sprayed to the outside from the nozzle 8 via the first flow path P1 and the second flow path P2. By performing the filling step and the spraying step simultaneously, it is possible to spray the liquid and prepare for the next spray at the same time by rotating the trigger once.

[0020] The spraying method AA of the present invention sequentially performs a filling step S1 in which the liquid in the base cylinder 4 is filled into the bottom of the storage cylinder 7 via the first flow path P1, and a post-filling spraying step S3 in which the liquid filled in the bottom of the storage cylinder 7 is sprayed out through the second flow path P2 by the spring force of the pressure spring body 9, thereby allowing continuous spraying even after the trigger is fully pulled. This makes it possible to spray continuously, improving the usability of the pressure-accumulation sprayer A. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a cross-sectional view showing a pressure-accumulation sprayer. [Figure 2] FIG. 2 is an enlarged cross-sectional view showing the base cylinder. [Figure 3]FIG. 3 is an enlarged cross-sectional view showing the base cylinder. [Figure 4] FIG. 4 is an enlarged cross-sectional view showing the base cylinder. [Figure 5] FIG. 5 is an explanatory diagram showing an exploded cross section of the components from the second valve to the nozzle. [Figure 6] FIG. 6 is an explanatory diagram showing the flow of liquid from the second valve to the second flow path. [Figure 7] FIG. 7 is an exploded perspective view showing the connection between the second flow path and the nozzle valve. [Figure 8] FIG. 8 is a cross-sectional side view showing the opening and closing of the nozzle valve. [Figure 9] FIG. 9 is a flow chart illustrating the jetting method of the present invention. [Figure 10] FIG. 10 is a simplified explanatory diagram showing the pressure-accumulator sprayer before spraying. [Figure 11] FIG. 11 is an explanatory diagram showing the filling step and the injection step in a simplified manner. [Figure 12] FIG. 12 is an explanatory diagram showing the post-filling injection step in a simplified manner. [Figure 13] FIG. 13 is an explanatory diagram showing the suction step in a simplified manner. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as necessary. In the drawings, the same elements are denoted by the same reference numerals, and redundant explanations will be omitted. Furthermore, unless otherwise specified, the positional relationships such as up, down, left, and right will be based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios of the drawings are not limited to those shown in the drawings.

[0023] FIG. 1 is a cross-sectional view showing a pressure-accumulation sprayer A. The pressure-accumulator sprayer A of the present invention is a device for spraying the liquid in the container 1 in the form of a mist by rotating the trigger 5. The pressure-accumulation sprayer A comprises a container 1 for storing liquid, a cap portion 2 connected to the container 1, and a base portion B attached to the cap portion 2. A tube-shaped suction passage 3 for suctioning liquid from the inside of the container 1 is attached to the base portion B. In addition, there is provided a base cylinder 4 that sucks liquid from the container 1 through the suction passage 3, a base piston 4a that slides within the base cylinder 4, a storage cylinder 7 located downstream of the base cylinder 4, a storage piston 7a that slides within the storage cylinder 7, a valve case 6 provided around the storage cylinder 7, a first flow path P1 that connects the base cylinder 4 and the storage cylinder 7, and a second flow path P2 that is provided between the storage cylinder 7 and the valve case 6, and the base part B functions as a frame that houses these.

[0024] The pressure-accumulating sprayer A also includes a first valve V1 that opens and closes between the suction passage 3 and the base cylinder 4, a second valve V2 that opens and closes between the base cylinder 4 and the valve case 6, and a nozzle valve V3 that slides inside the storage cylinder 7 and opens and closes between the valve case 6 and the nozzle 8. In a normal state, the first valve V1 is pressed in the valve closing direction by the internal pressure of the base piston 4a. Further, the second valve V2 and the nozzle valve V3 are each pressed in a valve closing direction by a pressure spring body 9.

[0025] The container 1 is suitably made of synthetic resin or the like. The liquid stored in the container 1 may be any type, such as a household or commercial detergent, as long as it is sprayed in mist form. The mouth of the container 1 is threaded, for example, so that a cap portion 2, which will be described later, can be attached.

[0026] The cap part 2 is attached to the opening of the container 1 by, for example, screwing. When the cap part 2 is attached to the container 1, the suction passage 3 is immersed in the liquid in the container 1.

[0027] The base cylinder 4 is cylindrical, and has a base piston 4a attached thereto, which slides within the base cylinder 4. As described above, the base piston 4a slides within the base piston 4a as the trigger 5 rotates. The trigger 5 is provided so that a user can pull it in by gripping it with their fingers. The trigger 5 is biased by a spring (not shown) so that it always returns to its original state when not retracted.

[0028] When the trigger 5 rotates in the direction of returning from the pulled state, the base piston 4a slides in the direction away from the first valve V1, and the volume inside the base cylinder 4 increases. This creates a negative pressure inside the cylinder, and the first valve V1 that closes the gap between the suction passage 3 and the cylinder opens, causing the liquid in the container 1 to flow into the cylinder via the suction passage 3.

[0029] Next, the trigger 5 rotates in the direction in which it is pulled in, and the basic piston 4a moves in the direction approaching the first valve V1. This increases the pressure in the base cylinder 4, causing the first valve V1 to close. Meanwhile, the liquid pressurized by the base piston 4a flows into the first flow path P1.

[0030] When the trigger 5 rotates back and forth, the base piston 4a moves back and forth, and the above-mentioned movement of the liquid is repeated. In other words, the inside of the base cylinder 4 is always filled with new liquid. When using a brand new pressure-accumulator sprayer A, for example, when the cylinder is not filled with liquid, the trigger 5 is rotated multiple times to expel the air from the cylinder and draw liquid into the cylinder, thereby making the pressure-accumulator sprayer A ready for use.

[0031] FIG. 2 is an enlarged cross-sectional view showing the base cylinder 4. A vent piston 4b that slides along with the base piston 4b is provided below the base piston 4a. Also, on the opposite side of the bottom of the base cylinder 4, i.e., the side where the liquid does not flow because it is blocked by the base piston 4b, a vent hole 4c and an exhaust hole 4d are provided, which communicate with the container 1. The vent piston 4b opens and closes the communication between the inside of the base cylinder 4 and the container 1, and air moves, allowing liquid to be smoothly drawn into the base piston 4 from the container 1. Figure 2 shows the state in which the base piston 4b is farthest from the first valve V1 (trigger-5 is not pulled), and the space between the vent piston 4b and the base piston 4a is connected to the container 1 via the vent hole 4b and the exhaust hole 4d.

[0032] FIG. 3 is an enlarged cross-sectional view showing the base cylinder 4. In the state shown in FIG. 3, the trigger 5 is pulled to a certain extent, and the base piston 4a and the vent piston 4b are retracted to a certain extent. At this time, as the vent piston 4b moves, the vent hole 4b opens, and the space between the inner wall on the trigger 5 side of the base cylinder 4 and the vent piston 4b becomes connected to the container 1, allowing air to move through these spaces. The space between the inner wall of the base cylinder 4 on the trigger 5 side and the vent piston 4b expands due to the movement of the base piston 4a and the vent piston 4b, so that the flow of air into the container 1 allows the base piston 4a and the vent piston 4b to move smoothly. At this time, the space between the base piston 4a and the vent piston 4b is also connected to the container 1, which is a large space, through the exhaust hole 4d, so the air is not compressed by the retraction of the trigger 5, and the retraction of the trigger 5 and the movement of the base piston 4a and the vent piston 4b are not hindered. The extent to which the trigger 5 must be pulled to open the vent hole 4c can be adjusted as appropriate, but it is preferable that the vent hole 4c opens when the trigger 5 is pulled about 5 to 15% of the full stroke. This allows the trigger 5 to be pulled in smoothly and the liquid to be drawn from the container 1 into the base cylinder 4, as will be described later.

[0033] FIG. 4 is an enlarged view showing the base cylinder 4. In the state of FIG. 4, the trigger 5 is fully retracted, and the base piston 4 a and the vent piston 4 b are closest to the bottom of the base cylinder 4 . At this time, neither the vent hole 4b nor the exhaust hole 4d is blocked by the vent piston 4b, and is in an open state.

[0034] Even when the trigger 5 returns due to spring force, the container 1 communicates with the space between the base piston 4 and the vent piston 4b, or the space between the base piston 4a and the vent piston 4b, in the reverse order to that described above, allowing the trigger 5 to rotate smoothly and the base piston 4a and the vent piston 4b to move smoothly. This allows the liquid to be drawn into the base cylinder 4 from the container 1 smoothly. In particular, when starting to use the pressure-accumulator sprayer A, the trigger 5 is rotated multiple times to remove air from the base cylinder 4 and the storage cylinder 5 described below and draw in the liquid (so-called dry firing), and the rotation of the trigger 5 and the movement of the base piston 4a and vent piston 4b are carried out smoothly, making it easy to start using the pressure-accumulator sprayer A.

[0035] FIG. 5 is an explanatory diagram showing an exploded cross section of the second valve V2 to the nozzle 8. The valve case 6 is a cylindrical member, and a cylindrical storage cylinder 7 is provided inside the valve case 6. The bottom of the storage cylinder 7 communicates with the first flow path P1, and a second valve V2 is provided between the bottom and the first flow path P1. A storage piston 7a that slides inside the storage cylinder is provided inside the storage cylinder 7, and the storage piston 7a is pressed by a pressure spring body 9, as will be described later. A second flow path P2 is provided between the valve case 6 and the storage cylinder 7, and the second flow path is connected to the nozzle 8. A nozzle valve V3 that slides inside the storage valve is provided between the second flow path P2 and the nozzle 8. The nozzle valve V3 is nail-shaped with a conical tip, and closes when the needle-shaped part enters the nozzle 8. The nozzle valve V3 is pressed by a resilient pressure spring body 9, as will be described later. That is, a storage cylinder 7 is provided in the valve case 6, and a second valve V2, a storage piston 7a, a pressure spring body 9, and a nozzle valve V3 are provided in the storage cylinder 7 in this order from the first flow path P1 side to the nozzle 8 side. A known structure can be suitably used for the nozzle valve V3.

[0036] The second valve V2 is a check valve (non-return valve) equipped with a whisker spring. The second valve V2 allows the liquid to flow in one direction from the first flow path P1 to the inside of the valve case 6.

[0037] The first flow path P1 communicates with the valve case 6, and a second valve V2 closes the first flow path P1. The second valve V2 is biased in the valve closing direction by a pressure spring body 9, as will be described later. The liquid that has flowed into the first flow path P1 is in a pressure-accumulated state as described above, and therefore overcomes the pressing force of the pressure spring body 9 and presses the second valve V2 in the valve opening direction. This causes the second valve V2 to open, and the liquid flows into the valve case 6 from the first flow path P1. As a result, when the liquid pressure in the first flow path P1 drops, the second valve V2 closes and the inflow of liquid into the valve case 6 stops.

[0038] FIG. 6 is an explanatory diagram showing the flow of liquid from the second valve V2 to the second flow path P2. The liquid drawn into the base piston 4a from the container 1 through the suction passage 3 passes through the first flow path P1, the second valve, the second flow path P2, and the third valve in that order as the trigger 5 connected to the base piston 4a rotates, and is then sprayed to the outside through the nozzle 8.

[0039] The storage piston 7a is a member that slides within the valve case 6 by hydraulic pressure or the pressing force of the pressure spring body 9. The storage piston 7a is in a state of being pressed by the pressure spring body 9 toward the second valve V2 (outside the valve case 6). When liquid flows into the valve case 6 from the second valve V2, the liquid pressure inside the valve case 6 overcomes the pressing force of the pressure spring body 9 and presses the storage piston 7a in a direction away from the second valve V2 (i.e., inward toward the valve case 6). This ensures space for the liquid to flow into the valve case 6 from the first flow path P1.

[0040] The pressure spring body 9 is made up of multiple spring pieces 9a. Each spring piece 9a has the same shape and is made up of a pair of disk-shaped flat portions 9aa and a connecting portion 9ab that connects the flat portions 9aa. In this embodiment, the two flat portions 9aa are connected by three arch-shaped connecting portions 9ab. The spring pieces 9a are arranged between the storage piston 7a and the nozzle valve V3 with their disk portions oriented in the same direction so that they are in contact with each other, thereby pressing the storage piston 7a and the nozzle valve V3 in directions away from each other (i.e., toward the outside of the valve case 6). The arch-shaped connecting portion 9ab allows the pressure of the pressure spring body 9 to be exerted efficiently.

[0041] The pressure spring body 9 is made up of small spring pieces 9a, and since it presses the storage piston 7a and the nozzle valve V3 simultaneously, the spring forces of the small spring pieces 9a are exerted equally on each other, the nozzle valve V3, and the storage piston 7a, and they can press each other equally. This makes it possible to efficiently accumulate pressure in the valve case 6 and in the second flow path P2. Since all the spring pieces 9a have the same shape, it is possible to easily adjust the spring force and perform maintenance when part of the pressure spring body 9 is damaged. Therefore, the maintainability is improved.

[0042] The storage piston 7a is always biased by the pressure spring body 9. Therefore, when the second valve V2 closes and the inflow of liquid into the valve case 6 stops, the storage piston 7a is pressed by the pressure spring body 9 and slides within the valve case 6 toward the second valve V2, pushing out the liquid. At this time, a plurality of inlets for the second flow paths P2 are provided on the outer periphery of the second valve V2, and the liquid is forced into the second flow paths P2.

[0043] FIG. 7 is an exploded perspective view showing the connection between the second flow path P2 and the nozzle valve V3. The second flow path P2 is provided so as to connect both ends of the cylindrical valve case 6 by bypassing the outside of the valve case 6. The outlet of the second flow path P2 is connected to the nozzle 8, and a nozzle valve V3 closes the connection therebetween.

[0044] FIG. 8 is a cross-sectional side view showing the opening and closing of the nozzle valve V3. The nozzle valve V3 is closed by being pressed toward the nozzle 8 side (outside the valve case 6) by the resilient pressure spring body 9. When the liquid pressed by the storage piston 7a flows into the second flow path P2 and the liquid pressure in the second flow path P2 increases, the liquid overcomes the pressing force of the pressure spring body 9 and presses the nozzle valve V3, opening the nozzle valve V3. This causes the liquid to be sprayed outward from the nozzle 8 with great force.

[0045] As described above, the pressure spring body 9 presses the storage piston 7a and the nozzle valve V3 simultaneously. Therefore, when the liquid flowing in from the second valve V2 presses the storage piston 7a, the nozzle valve V3 is also strongly pressed in the valve closing direction via the pressure spring body 9. On the other hand, when the liquid flows into the second flow path P2 due to pressure from the storage piston 7a, the force pressing the pressure spring body 9 gradually weakens. In other words, the pressure that closes the nozzle valve V3 decreases. The balance between this decrease in the pressure of the pressure spring body 9 and the increase in liquid pressure in the second flow path P2 opens the nozzle valve V3, and spraying occurs from the nozzle 8.

[0046] That is, as the liquid in the second flow path P2 is sprayed from the nozzle 8 and the pressure in the second flow path P2 is reduced, the pressing force exerted by the pressure spring body 9 pushes the liquid in the valve case 6 into the second flow path P2, making it possible to maintain continuous spray from the nozzle 8.

[0047] The flow of liquid in each of the above-mentioned sections will be summarized below, and a series of liquid flows in the pressure-accumulation sprayer A of the present invention and in the liquid spraying method AA using the pressure-accumulation sprayer A will be explained.

[0048] FIG. 9 is a flow chart illustrating the injection method AA of the present invention. The spraying method AA includes a filling step S1 in which the liquid in the basic cylinder 4 is filled into the bottom of the storage cylinder 7 via the first flow path P1, a spraying step S2 in which the liquid in the basic cylinder 4 is sprayed out from the nozzle 8 via the first flow path P1 and the second flow path P2, a post-filling spraying step S3 in which the liquid filled in the bottom of the storage cylinder 7 is sprayed out through the second flow path P2 by the spring force of the pressure spring body 9, and a suction step S4 in which the liquid in the container 1 is sucked into the basic cylinder 4 via the suction passage 3. By rotating the trigger 5, the filling step S1 and the spraying step S2 are carried out simultaneously, and then the post-filling spraying step S3 and the suction step S4 are carried out in sequence.

[0049] The base cylinder 4 is filled with liquid. When starting to use the pressure-accumulator sprayer A, the trigger 5 is rotated with the tip of the suction passage 3 in contact with the liquid in the container 1, which is called blank spraying. When the trigger 5 returns from the squeezed state to the normal state, the basic piston 4a in the basic cylinder 4 slides, and liquid is drawn into the cylinder from the container 1 via the suction passage 3 and the first valve V1. The first valve V1 opens when negative pressure is created inside the cylinder, and closes when the liquid flows into the cylinder and the liquid pressure exceeds a certain level.

[0050] Fig. 10 is an explanatory diagram showing in simplified form the pressure-accumulation sprayer A before spraying. Arrows in Figs. 10 to 13 indicate the direction of liquid flow or the direction of piston movement. Before injection, both the base cylinder 4 and the storage cylinder 7 are filled with liquid. At this time, the base piston 4a is away from the first valve V1, and the volume inside the base cylinder 4 is large.

[0051] FIG. 11 is an explanatory diagram showing the filling step S1 and the injection step S2 in a simplified manner. When the trigger 5 is pulled, the base piston 4a slides, increasing the liquid pressure in the base cylinder 4. At this time, the first valve V1 is closed, so the liquid flows into the first flow path P1 and accumulates pressure.

[0052] At this time, when the liquid pressure in the first flow path P1 increases, the second valve V2, which is a check valve, opens, and the liquid flows into the valve case 6 from the first flow path P1. This causes the liquid in the base cylinder 4 to flow into the bottom of the storage cylinder 7 via the first flow path P1. The bottom of the storage cylinder 7 and the valve case 6 are connected, and the liquid that flows into the bottom of the storage cylinder 7 overcomes the pressing force of the pressure spring body 9 and pushes the storage piston 7a, filling the bottom of the valve case 6.

[0053] On the other hand, the liquid that has flowed into the bottom of the storage cylinder 7 passes through the second flow path P2, opens the nozzle valve V3, and is sprayed to the outside. In this way, by pulling the trigger 5, both the filling of the liquid into the storage cylinder 7 and the injection of the liquid to the outside are carried out.

[0054] FIG. 12 is an explanatory diagram showing the post-filling injection step S3 in a simplified manner. In the above-described filling step S1 and injection step S2, when the liquid in the base cylinder 4 is discharged, the second valve V2 is closed. After this, the liquid filled at the bottom of the storage piston 7 passes through the second flow path P2 and is sprayed out from the nozzle valve V3. That is, the storage piston 7a moves toward the second valve V2 due to the spring force of the pressure spring body 9. As a result, the liquid at the bottom of the storage piston 7 is pressurized and passes through the second flow path P2 and is sprayed out from the nozzle valve V3. This is because, between the container 1 and the nozzle 8, the liquid is pressurized in the first flow path P1 and the second flow path P2 by the first valve V1, the second valve V2, and the nozzle valve V3.

[0055] Specifically, the base piston 4a in the base cylinder 4 is linked to the rotation of the trigger 5, and the sliding of the base piston 4a causes pressure accumulation of the liquid in the first flow path P1. In the present invention, a pressure accumulation state occurs in the second flow path P2 between the second valve V2 and the nozzle valve V3. Therefore, even after the liquid flows out of the first flow path P1 and the pressure accumulation state in the first flow path P1 is resolved, spraying can continue until the pressure accumulation state in the second flow path P2 is resolved by spraying from the nozzle 8.

[0056] In the ejection step S2, when the liquid in the second flow path P2 is ejected to the outside from the nozzle 8, the liquid pressure at the bottom of the storage cylinder 7, which is in communication with the second flow path P2, drops. As a result, the elastic force of the pressure spring body 9 overcomes the liquid pressure at the bottom of the storage cylinder 7 and presses the liquid. At this time, since the second valve V2 is closed, the liquid flows into the second flow path P2, and the liquid pressure in the second flow path increases. This liquid pressure opens the nozzle valve V3, and the liquid continues to be ejected.

[0057] Therefore, in the pressure-accumulation sprayer A of the present invention, the liquid is maintained in a pressure-accumulation state at multiple locations in the first flow path P1 and the second flow path P2, and continuous spraying from the nozzle 8 is possible even after the trigger 5 is fully pulled and rotation of the trigger 5 has ceased. This allows spraying over a wider area at once, improving usability.

[0058] FIG. 13 is an explanatory diagram showing the suction step S4 in a simplified manner. The retracted trigger 5 is returned to its unretracted state by a spring (not shown), as described above. At this time, because the base piston 4a and the trigger are linked, the base piston 4a slides within the base cylinder 4 in a direction away from the first valve V1 as the trigger 5 returns due to its spring force. This creates a negative pressure within the base cylinder 4, opening the first valve V1 and sucking up liquid from the container 1 into the base cylinder 4 via the suction passage 3. As a result, the inside of the base cylinder 4 is filled with liquid again, and the base cylinder 4 is ready for the next injection.

[0059] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments.

[0060] The diameter and shape of the nozzle 8 are optional. The size of the diameter may be adjusted or a structure such as a net may be provided depending on the desired shape of the spray.

[0061] In this embodiment, the pressure spring body 9 is made up of multiple spring pieces 9a, but this is not limited to this. For example, it may be made up of a single spring coil. In this case, the number of parts can be reduced. Also, the pressure spring body can exert a relatively high pressing force. [Industrial Applicability]

[0062] The pressure-accumulator sprayer A of the present invention can be widely used as a sprayer for home or commercial use when continuous spraying is required. [Explanation of symbols]

[0063] A... Pressure-accumulating sprayer AA...Injection method 1...container 2 Cap part B... Base 3. Suction passage 4. Base cylinder 4a... Base piston 4b...Vented piston 4c...Vent hole 4d...exhaust hole 5. Trigger 6. Valve case 6a Valve case cylinder 7. Storage cylinder 7a... Storage piston 8 Nozzle P1: First flow path P2: Second flow path V1 First Valve V2...Second valve V3 Nozzle Valve 9. Pressure spring body 9a Spring piece 9aa...Flat plate part 9ab...Connection part S1...Filling process S2...Injection process S3...Injection process after filling S4: Suction process

Claims

1. A pressure-accumulator sprayer for spraying a liquid in a container, a base cylinder for sucking the liquid from the container through a suction passage; a base piston that slides within the base cylinder; a storage cylinder located downstream of the base cylinder; a storage piston that slides within the storage cylinder; a valve case provided around the storage cylinder; a first flow path communicating the base cylinder with the storage cylinder; a second flow path provided between the storage cylinder and the valve case; a first valve that opens and closes between the suction passage and the base cylinder, a second valve that opens and closes between the base cylinder and the valve case, and a nozzle valve that slides within the storage cylinder and opens and closes between the valve case and a nozzle; Equipped with By rotating the trigger connected to the base piston, the liquid in the base cylinder passes through the first flow path, the second valve, the second flow path, and the third valve in this order, and is sprayed to the outside through the nozzle, The pressure-accumulating sprayer is characterized in that the liquid in the base cylinder is filled into the storage cylinder through the first flow path and the second valve.

2. 2. The pressure-accumulation sprayer according to claim 1, wherein a pressure spring body is provided between the nozzle valve and the storage piston.

3. 3. The pressure-accumulation sprayer according to claim 2, wherein the pressure spring body is made up of a plurality of small spring pieces.

4. A spraying method for spraying the liquid in the container to the outside from a nozzle using the pressure-accumulation sprayer according to claim 1, a filling step of filling the liquid in the base cylinder through the first flow path into the bottom of the storage cylinder; an ejection step of ejecting the liquid in the base cylinder to the outside from the nozzle through the first flow path and the second flow path; and The injection method is characterized in that the filling step and the injection step are carried out simultaneously.

5. A spraying method for spraying the liquid in the container to the outside from a nozzle using the pressure-accumulation sprayer according to claim 1, a filling step of filling the liquid in the base cylinder through the first flow path into the bottom of the storage cylinder; a post-filling injection step of injecting the liquid filled in the bottom part of the storage cylinder to the outside through the second flow path by the spring force of the pressure spring body; An injection method characterized by sequentially performing the above steps.

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