Method for assembling an electrostatic spraying head and its nozzle.

Abstract

To enable selective attachment of nozzles of different fluid release volumes to be simply and easily performed by suppressing an increase in the number of components.SOLUTION: An electrification scattering head comprises: a nozzle part, which releases liquid particles to scatter electrification liquid particles and enables one of a large water amount nozzle 50 that is a first liquid amount nozzle and a small water amount nozzle that is a second liquid amount nozzle is selectively attached; a water side electrode part 14 in which an inner channel 1410 supplying a liquid to the nozzle part is formed penetrating therethrough; a nozzle holding part 32 as nozzle attachment structure, provided on the outflow side of the water side electrode part 14 to be able to selectively attach the large water amount nozzle 50 and the small water amount nozzle of different water release amounts and shapes as a nozzle part; a large water amount nozzle storage part 3210; and a small water amount nozzle storage part 1460.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a charged spraying head for charging and spraying liquid particles and a method for assembling its nozzle.

Background Art

[0002] Conventionally, in a charged spraying head for charging and spraying fine particles of a liquid such as water, charged liquid particles with an average particle diameter of 10 to 300 μm can be sprayed. It is provided in a fire extinguishing facility such as a building that is a spraying target area, and the charged liquid particles sprayed on the smoke generated by a fire are electrically adsorbed to eliminate the smoke. Also, by electrically adsorbing the dust floating in the air at the demolition site of a building or the like to the charged liquid particles, it is possible to remove the dust from the air.

[0003] FIG. 16 shows the structure of a conventional charged spraying head in a sectional view. As shown in FIG. 16, the charged spraying head 100 includes a main body portion 120, a water-side electrode portion 140, an electrode connection portion 160, a liquid conduit portion 180, a main body cover portion 200, a nozzle portion 220, an induction electrode portion 240, and an arm portion 260.

[0004] Here, in the description of FIG. 16, the X - Y - Z directions are directions orthogonal to each other. Specifically, the Y-axis direction is the flow direction and the up - down direction of water passing through the charged spraying head 100, the X direction is the left - right direction, and the Z direction is the front - back direction. Also, the +X side in the X direction is the right side, the -X side is the left side, the +Y side in the Y direction is the upper side, the -Y side is the lower side, the +Z side in the Z direction is the front side, and the -Z side is the back side.

[0005] Also, since the Y-axis direction, which is the up - down direction, is the flow direction of water passing through the head, the +Y side, which is the upper side, may be referred to as the inflow side, and the -Y side, which is the lower side, may be referred to as the outflow side. This is the same in the X - Y - Z directions in FIGS. 1 to 15, which are embodiments of the present invention. Note that the X - Y - Z directions are relative directions that change according to the mounting state of the charged spraying head 100 in the spraying target area.

[0006] The main body 120, liquid conduit 180, main body cover 200, nozzle 220, and arm 260 are insulators made of an insulating material such as polyvinyl chloride resin. The water-side electrode 140 and electrode connecting part 160 are conductors made of a conductive material such as metal.

[0007] An electrode mounting hole 121 is formed through the main body 120 in the direction of the head axis 350 (up and down direction). The water side electrode part 140 is fitted into the electrode mounting hole 121 from the outflow side. The liquid conduit part 180 is fitted to the main body 120 from the inflow side via a terminal chamber 124 formed on the inflow side of the main body 120. The electrode connecting part 160 is screwed into the water side electrode part 140 through the liquid conduit part 180, thereby attaching and fixing the water side electrode part 140 to the electrode mounting hole 121 and connecting and fixing the liquid conduit part 180 to the water side electrode part 140.

[0008] Multiple screw holes 164 are provided in the electrode connection section 160, allowing the terminals of an earth cable inserted via a waterproof connector to be connected through electrode connector mounting holes 127 formed in the lateral direction (perpendicular to the vertical direction, to the right in Figure 16) of the terminal chamber 124. The upper part of the liquid conduit section 180 is brought out to the outside via the main body cover section 200, and water is supplied from an external water supply pump or the like.

[0009] A nozzle section 220 is provided at the outlet end of the water-side electrode section 140, which is arranged along the head axis 350 direction (vertical direction) of the main body section 102, by a nozzle holding section 230, and water particles with an average particle diameter of 10 to 300 μm are released from the nozzle section 220. In the open space on the outlet side of the nozzle section 220, the ring section 243 of the induction electrode section 240 is held by three arm sections 260, and the water particles released from the nozzle section 220 are charged. The ring section 243 of the induction electrode section 240 is formed by insulating a conductive electrode core material. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Japanese Patent Publication No. 2009-106405 [Patent Document 2] Japanese Patent Publication No. 2018-183712 [Overview of the project] [Problems that the invention aims to solve]

[0011] Incidentally, the amount of water discharged (liters / minute) from the nozzle section 220 for discharging charged water particles with a conventional electrostatic spraying head 100 varies depending on the area to be sprayed, such as a building equipped with fire extinguishing equipment or a demolition site. For example, the discharge rate can be set as needed, such as a high rate of 1 liter per minute or a low rate of 0.1 liters per minute. Therefore, in the manufacture of the electrostatic spraying head 100, multiple nozzle sections 220 with different discharge rates are prepared, and the nozzle section 220 with the discharge rate corresponding to the area to be sprayed is attached to the electrostatic spraying head 100.

[0012] However, for example, a nozzle designed to discharge a large volume of water at a rate of 1 liter per minute and a nozzle designed to discharge a small volume of water at a rate of 0.1 liters per minute (one-tenth of the large volume) would not be able to use the same nozzle structure due to the difference in discharge volume. Therefore, the structure and shape of the large-volume nozzle and the small-volume nozzle would have to be different.

[0013] Therefore, in the manufacture of the electrostatic spraying head 100, the nozzle mounting structure corresponding to the high-volume nozzle and low-volume nozzle, which have different structures and shapes, specifically the nozzle holding part 230 for attaching the nozzle part 220 and the mounting structure on the outflow side of the water-side electrode part 140, are prepared separately according to the water discharge volume of the nozzle part 220 and selected according to the nozzle part 220 to be attached. As a result, the nozzle mounting structure cannot be standardized, and the number of parts in the electrostatic spraying head increases depending on the type of nozzle used in the nozzle part 220, making production management and assembly work complicated and increasing costs.

[0014] The present invention aims to provide an electrostatic spraying head and a nozzle assembly method thereof that suppresses the increase in the number of parts and allows for easy and simple selective attachment of nozzles with different liquid discharge volumes. [Means for solving the problem]

[0015] (Electrostatic dispersal head 1) The present invention relates to a charged spraying head that sprays charged liquid particles, which are discharged from a nozzle, onto a target area. The nozzle section is characterized by a nozzle mounting structure that allows for the selective attachment of a first liquid volume nozzle and a second liquid volume nozzle, each having a different liquid discharge volume and shape.

[0016] (Electrostatic dispersal head 2) The present invention relates to a charged spraying head that sprays charged liquid particles onto a target area, The main body and A nozzle section that releases liquid particles in order to disperse charged liquid particles, When a predetermined voltage is applied to charge the liquid particles discharged from the nozzle, one of the electrodes is formed, and an internal channel that supplies liquid supplied from the outside to the nozzle passes through the water-side electrode section, A nozzle mounting structure is provided on the outlet side of the water-side electrode section, and allows for the selective attachment of a first liquid volume nozzle and a second liquid volume nozzle, which have different discharge liquid volumes and shapes, as the nozzle section. It is characterized by having the following features.

[0017] (Nozzle mounting structure) The nozzle mounting structure is, A nozzle holding part is formed with a through-hole and can be attached and fixed to the outlet end of the water-side electrode part, A first nozzle storage section is formed in the through-hole of the nozzle holding section and houses the first liquid volume nozzle, A second nozzle housing is formed on the outflow side of the internal flow path of the water-side electrode section and houses the second liquid volume nozzle in a fixed and attached state, It is equipped with.

[0018] (Through hole in the nozzle holder) The through-hole of the nozzle holding part is sized such that the second liquid volume nozzle can be inserted therethrough.

[0019] (Sealing member) The nozzle mounting structure further includes a sealing member that seals between the internal flow path of the water-side electrode part when the first liquid volume nozzle is selected, between the first nozzle housing part of the nozzle holding part and the first liquid volume nozzle, and between the internal flow path of the water-side electrode part and the second liquid volume nozzle when the second liquid volume nozzle is selected.

[0020] (Structure of nozzle housing part and nozzle) The water-side electrode part includes a first fitting receiving part on the outer periphery of the outflow-side end part and a second fitting receiving part formed in the internal flow path on the outflow side in the second nozzle housing part, The nozzle holding part includes a first fitting part that fits into the first fitting receiving part on the inflow side of the through-hole, and forms the first nozzle housing part as a stepped hole whose diameter is reduced toward the outflow side, The first liquid volume nozzle has a stepped shape whose diameter is reduced toward the outflow side corresponding to the stepped hole of the first nozzle housing part, The second liquid volume nozzle includes a second fitting part that fits into the second fitting receiving part on the outer periphery of the inflow-side end part.

[0021] (Method for assembling nozzle of charged spraying head) The present invention is a method for assembling a nozzle of a charged spraying head provided with a nozzle mounting structure that enables selectively mounting a first liquid volume nozzle or a second liquid volume nozzle having different discharge liquid volumes and shapes to a nozzle part that discharges liquid particles for spraying charged liquid particles onto a spraying target area, The nozzle mounting structure is attachable and fixed to the outflow-side end part of a water-side electrode part in which an internal flow path for supplying liquid supplied from the outside to the nozzle part penetrates and is formed, and serves as one of the electrodes when applying a predetermined voltage to charge the liquid particles discharged from the nozzle part, and a nozzle holding part in which a through-hole is formed therethrough, a first nozzle housing part formed in the through-hole of the nozzle holding part for housing the first liquid volume nozzle, A second nozzle housing is formed on the outflow side of the internal flow path of the water-side electrode section and houses the second liquid volume nozzle in a fixed and attached state, Equipped with, If you select the first liquid volume nozzle, The first step involves storing the first liquid volume nozzle in the first nozzle storage section of the nozzle holding section, The second step involves attaching and fixing the nozzle holding unit, which houses the first liquid volume nozzle, to the outlet end of the water-side electrode unit. Includes, If you select the second liquid volume nozzle, The invention is characterized by including a third step of attaching and fixing a second liquid volume nozzle to the second nozzle housing section of the internal flow path of the water-side electrode section and housing it.

[0022] (Details of steps 2 and 3) The water-side electrode section includes a first mating receiving section on the outer circumference of the outlet-side end, and a second mating receiving section in the second nozzle housing section formed in the internal flow path on the outlet side. The nozzle holding portion includes a first mating portion that mats with the first mating receiving portion on the inflow side of the through hole. The second liquid volume nozzle is provided with a second mating portion on the outer circumference of the inlet end that mats with the second mating receiving portion. The second step involves fitting the first mating portion of the nozzle holding portion into the first mating receiving portion of the water-side electrode portion, thereby attaching and fixing the nozzle holding portion to the water-side electrode portion. The third step involves fitting the second mating portion of the second liquid volume nozzle into the second mating receiving portion of the water-side electrode portion, thereby storing the second liquid volume nozzle in a fixed position within the second nozzle storage section.

[0023] (Arrangement of sealing members 1) If the first liquid volume nozzle is selected, the first liquid volume nozzle is stored in the first nozzle storage section via a sealing member in the first step so that after the completion of the second step, the internal flow path of the water-side electrode section, the first nozzle storage section of the nozzle holding section, and the first liquid volume nozzle are sealed. If a second liquid volume nozzle is selected, the second liquid volume nozzle is stored in the second nozzle housing via a sealing member during the third step so that the space between the internal flow path of the water-side electrode section and the second liquid volume nozzle is sealed after the completion of the third step.

[0024] (4th step) The through-hole in the nozzle holder is sized to allow the second liquid volume nozzle to be inserted. If you select the second liquid volume nozzle, The process includes a fourth step, following the third step, in which the second liquid volume nozzle is inserted through the through hole of the nozzle holding part, and the nozzle holding part is attached and fixed to the water-side electrode part.

[0025] (Arrangement of sealing members 2) In the fourth step, a sealing member is placed in the first nozzle housing so that after the completion of the fourth step, the internal flow path of the water-side electrode section, the first nozzle housing section of the nozzle holding section, and the second liquid volume nozzle are sealed.

[0026] (Amount of liquid discharged from the nozzle) The first liquid volume nozzle is a nozzle that discharges a larger volume of liquid than the second liquid volume nozzle. [Effects of the Invention]

[0027] (Effect of electrostatic dispersal head 1) The present invention relates to a charged spraying head that sprays charged liquid particles, which are discharged from a nozzle, onto a target area. The nozzle is provided with a nozzle mounting structure that allows for the selective attachment of a first liquid volume nozzle and a second liquid volume nozzle, which have different discharge volumes and shapes. This eliminates the need to prepare different nozzle mounting structures for the first and second liquid volume nozzles, which have different discharge volumes and shapes, thus enabling the standardization of parts for the charged spraying head, simplifying and streamlining production management and assembly work, and reducing costs.

[0028] Furthermore, similar to the case of the electrostatic spraying head 1, the electrostatic spraying head 2 also benefits from the standardization of its components, making production management and assembly easier and reducing costs.

[0029] (Effect of nozzle mounting structure) Furthermore, the nozzle mounting structure includes a nozzle holding part formed with a through-hole that can be attached and fixed to the outlet end of the water-side electrode section, a first nozzle storage part formed in the through-hole of the nozzle holding part for storing the first liquid volume nozzle, and a second nozzle storage part formed on the outlet side of the internal flow path of the water-side electrode section for storing the second liquid volume nozzle in an attached and fixed state. As a result, the positions of the nozzle storage parts differ for the first and second liquid volume nozzles, and even with a common nozzle mounting structure, the type of nozzle installed can be easily and readily recognized from the nozzle's storage position. In addition, when installing a selected nozzle, it is necessary to store it in the corresponding storage part. Therefore, if it is not possible to store it in the intended storage part or if there is a sense of incongruity, it is possible to realize that the selected nozzle is incorrect, thereby enabling selective installation of the first and second liquid volume nozzles with reduced errors.

[0030] (Effect of the through-hole in the nozzle holder) Furthermore, since the through-hole in the nozzle holder is sized to allow the second liquid volume nozzle to be inserted, the nozzle holder can be attached even when the second liquid volume nozzle is selected, enabling a more secure hold of the second liquid volume nozzle.

[0031] (Effect of sealing material) Furthermore, the nozzle mounting structure includes sealing members that seal the internal flow path of the water-side electrode section when the first liquid volume nozzle is selected, the space between the first nozzle storage section of the nozzle holding section and the first liquid volume nozzle, and the space between the internal flow path of the water-side electrode section and the second liquid volume nozzle when the second liquid volume nozzle is selected. This makes it possible to more reliably prevent the liquid released from the nozzle section for spraying from leaking to the outside from anywhere other than the nozzle section.

[0032] (Effects of the nozzle storage compartment and nozzle structure) Furthermore, the water-side electrode section includes a first mating receiving section on the outer circumference of the outlet-side end and a second mating receiving section in the second nozzle housing section formed in the internal flow path on the outlet side. The nozzle holding section has a first mating section on the inlet side of the through-hole that mats into the first mating receiving section, and the first nozzle housing section is formed as a stepped hole that is reduced in diameter toward the outlet side. The first liquid volume nozzle has a stepped shape that is reduced in diameter toward the outlet side in accordance with the stepped hole of the first nozzle housing section, and the second liquid volume nozzle has a second mating section on the outer circumference of the inlet-side end that mats into the second mating receiving section. As a result, there is a difference between the first liquid volume nozzle and its mounting structure and the second liquid volume nozzle and its mounting structure. This makes it possible to more reliably notice that the wrong nozzle has been selected if it cannot be stored in the intended housing section or if there is a sense of incongruity, and further reduces errors by enabling selective installation of the first and second liquid volume nozzles.

[0033] Furthermore, the invention of the nozzle assembly method for the electrostatic spraying head produces the same effects as the invention of the electrostatic spraying head, so its explanation will be omitted. [Brief explanation of the drawing]

[0034] [Figure 1] This is an explanatory diagram showing the front view of the electrostatic dispersal head. [Figure 2] This is an explanatory diagram showing the top and bottom surfaces of the electrostatic dispersal head. [Figure 3] This is a perspective view of the electrostatic spraying head as seen from the outflow side. [Figure 4] This is an explanatory diagram showing a cross-sectional view of the internal structure of an electrostatic spray head equipped with a high-volume nozzle. [Figure 5] This is an explanatory diagram showing a cross-sectional view of the internal structure of an electrostatic spraying head fitted with a low-water-volume nozzle. [Figure 6] This is a diagram showing the water-side electrode section. [Figure 7] This is an explanatory diagram showing the nozzle holding part removed from the diagram. [Figure 8] This is an explanatory diagram showing a high-volume nozzle. [Figure 9] This is an explanatory diagram showing a small-volume nozzle. [Figure 10] This is an explanatory diagram showing the first step in the assembly method of a high-volume nozzle. [Figure 11] This is an explanatory diagram showing the second step in the assembly method of a high-volume nozzle. [Figure 12] This is an explanatory diagram showing the completed assembly of the high-flow nozzle. [Figure 13] This is an explanatory diagram showing the third step in the assembly method of a low-water-volume nozzle. [Figure 14] This is an explanatory diagram showing the fourth step in the assembly method of a low-water-volume nozzle. [Figure 15] This is an explanatory diagram showing the completed assembly of the low-water-volume nozzle. [Figure 16] This is a cross-sectional view showing the internal structure of a conventional electrostatic dispersal head. [Modes for carrying out the invention]

[0035] The following describes in detail, with reference to the drawings, embodiments of the electrostatic spraying head and the nozzle assembly method according to the present invention. However, the present invention is not limited to the following embodiments.

[0036] [Basic Concepts of the Embodiment] First, the basic concept of the embodiment will be explained. The embodiment generally relates to a charged spraying head and a method for assembling its nozzle that sprays charged liquid particles onto a target area.

[0037] Here, "charged spraying head" refers to a device that sprays charged liquid particles onto a target area, and the present invention is characterized by a nozzle mounting structure that allows for the selective attachment of a first liquid volume nozzle and a second liquid volume nozzle, which have different liquid discharge volumes and shapes, as the nozzle section. Furthermore, the charged spraying head according to the present invention comprises, in terms of configuration, at least a main body section, a nozzle section that discharges liquid particles in order to spray charged liquid particles, a water-side electrode section which becomes one of the electrodes when a predetermined voltage is applied to charge the liquid particles discharged from the nozzle section and has an internal flow path through which liquid supplied from the outside is passed to the nozzle section, and a nozzle mounting structure on the outflow side of the water-side electrode section.

[0038] Furthermore, "charged liquid particles" refer to liquid particles that have been charged by being discharged from the nozzle of the charged spraying head. For example, a predetermined high voltage is applied from a high-voltage power supply as the power source between the water-side electrode and the induction electrode, which is the other electrode of the charged spraying head. The potential of the induction electrode relative to the water-side electrode is adjusted, and the liquid particles discharged from the nozzle are charged by an induction charging method, passing through the high electric field generated at the induction electrode. The liquid being sprayed is any liquid that has a smoke-reducing effect, a fire-extinguishing effect, a dust-removing effect, etc., and includes, for example, water that is pressurized by an external water supply pump and supplied to the charged spraying head.

[0039] Furthermore, the "first liquid volume nozzle" and the "second liquid volume nozzle" are selected and attached as the nozzle parts of the electrostatic spraying head when it is assembled as an electrostatic spraying head. The liquid discharge volume and shape of the first and second liquid volume nozzles are arbitrary as long as they are different from each other, but for example, the first liquid volume nozzle may be a nozzle that discharges more liquid than the second liquid volume nozzle. In this case, the first liquid volume nozzle with a large liquid discharge volume may be called the "high liquid volume nozzle," and the second liquid volume nozzle with a small liquid discharge volume may be called the "low liquid volume nozzle."

[0040] Furthermore, while the amount of liquid discharged when using a "high-volume nozzle" or a "low-volume nozzle" is arbitrary, for example, the "high-volume nozzle" will have a discharge rate of 1.0 liter per minute, and the "low-volume nozzle" will have a discharge rate of 0.1 liters per minute.

[0041] Furthermore, the "nozzle mounting structure" provided on the outlet side of the water-side electrode section includes not only the structure of the water-side electrode section itself, but also members attached to the outlet side of the water-side electrode section, such as a nozzle holder that holds the nozzle section, and the structure provided by such members.

[0042] Furthermore, as a specific embodiment of the nozzle mounting structure, there is a nozzle holding part formed with a through hole that can be attached and fixed to the outlet end of the water-side electrode part, a first nozzle storage part formed in the through hole of the nozzle holding part for housing the first liquid volume nozzle, and a second nozzle storage part formed on the outlet side of the internal flow path of the water-side electrode part for housing the second liquid volume nozzle in an attached and fixed state, and as a more specific structure, the water-side electrode part has a first coupling receiver on the outer circumference of the outlet end The nozzle holding part comprises a section and a second nozzle housing section formed in the internal flow path on the outlet side, the nozzle holding part has a first mating section on the inlet side of the through hole that mats with the first mating section, and the first nozzle housing section is formed as a stepped hole that is reduced in diameter toward the outlet side, the first liquid volume nozzle has a stepped shape that is reduced in diameter toward the outlet side corresponding to the stepped hole of the first nozzle housing section, and the second liquid volume nozzle has a second mating section on the outer circumference of the end on the inlet side that mats with the second mating section.

[0043] Furthermore, the "nozzle holding section" holds the first liquid volume nozzle by housing it and attaching and fixing it to the water-side electrode section. By making the through-hole of the nozzle holding section large enough for the second liquid volume nozzle to pass through, it is possible to attach and fix the nozzle holding section to the water-side electrode section even when the second liquid volume nozzle is selected, thereby holding the second liquid volume nozzle more securely.

[0044] Furthermore, the "nozzle mounting structure" may also include a sealing member that seals the internal flow path of the water-side electrode section when the first liquid volume nozzle is selected, the space between the first nozzle storage section of the nozzle holding section and the first liquid volume nozzle, and the space between the internal flow path of the water-side electrode section and the second liquid volume nozzle when the second liquid volume nozzle is selected.

[0045] Furthermore, the present invention includes a "nozzle assembly method for an electrostatic spraying head," which is a nozzle assembly method for an electrostatic spraying head equipped with a nozzle mounting structure that allows selective attachment of a first liquid volume nozzle or a second liquid volume nozzle having different liquid discharge volumes and shapes to the nozzle section that discharges liquid particles in order to spray electrostatic liquid particles onto a target area. This method is divided into a "first liquid volume nozzle assembly method" when the first liquid volume nozzle is selected and a "second liquid volume nozzle assembly method" when the second liquid volume nozzle is selected.

[0046] The "assembly method for the first liquid volume nozzle" includes a first step of storing the first liquid volume nozzle in the first nozzle storage section of the nozzle holding section, and a second step of attaching and fixing the nozzle holding section, which houses the first liquid volume nozzle, to the outlet end of the water-side electrode section.

[0047] Furthermore, the "assembly method for the second liquid volume nozzle" includes a third step of attaching and fixing the second liquid volume nozzle to the second nozzle storage section of the internal flow path of the water-side electrode section. In addition, if the through hole of the nozzle holding section is sized to allow the second liquid volume nozzle to pass through, the method includes a fourth step, following the third step, in which the nozzle holding section is attached and fixed to the water-side electrode section with the second liquid volume nozzle inserted through the through hole of the nozzle holding section.

[0048] Furthermore, in nozzle assembly, sealing members may be provided. If a first liquid volume nozzle is selected, the first liquid volume nozzle may be stored in the first nozzle storage section via a sealing member in the first step so that the space between the internal flow path of the water-side electrode section, the first nozzle storage section of the nozzle holding section, and the first liquid volume nozzle is sealed after the completion of the second step. If a second liquid volume nozzle is selected, the second liquid volume nozzle may be stored in the second nozzle storage section via a sealing member in the third step so that the space between the internal flow path of the water-side electrode section and the second liquid volume nozzle is sealed after the completion of the third step. Alternatively, a sealing member may be provided in the first nozzle storage section in the fourth step so that the space between the internal flow path of the water-side electrode section, the first nozzle storage section of the nozzle holding section, and the second liquid volume nozzle is sealed after the completion of the fourth step.

[0049] The following describes a specific embodiment. In the specific embodiment shown below, the details will be explained for the case where the "charged spraying head" comprises a "main body, water-side electrode, liquid conduit, electrode connecting part, main body cover, nozzle, induction electrode part, and electrode holding structure", the "charged liquid particles to be sprayed" are "charged water particles", the "first liquid volume nozzle" is a "high-volume nozzle", the "second liquid volume nozzle" is a "low-volume nozzle", the "first nozzle storage part" is a "high-volume nozzle storage part", and the "second nozzle storage part" is a "low-volume nozzle storage part".

[0050] [Specific details of the embodiment] The specific details of the embodiment will be explained as follows: a. Structure of the electrostatic dispersal head b. Components of the nozzle mounting structure b1.Water side electrode part b2. Nozzle holding part b3. High-volume nozzle b4. Low-water-volume nozzle c. Assembly method for the nozzle of the electrostatic spraying head c1. Assembly method for high-volume nozzles c2. Assembly method for low-water-volume nozzles d. Modified forms of the present invention

[0051] [a. Structure of the electrostatic dispersal head] First, the structure of the electrostatic spray head will be explained. In this explanation, please refer to Figure 1, which shows the front view of the electrostatic spray head; Figure 2, which shows the top and bottom views of the electrostatic spray head; Figure 3, which is a perspective view of the electrostatic spray head as seen from the outlet side; Figure 4, which shows a cross-sectional view of the internal structure of the electrostatic spray head with a high-volume nozzle attached; and Figure 5, which shows a cross-sectional view of the internal structure of the electrostatic spray head with a low-volume nozzle attached. Note that Figure 2(A) shows the top view, Figure 2(B) shows the bottom view, and Figures 4 and 5 show the cross-section of the cutting line aa in Figure 2(A). Also, Figures 1 to 3 show the case when a high-volume nozzle is attached as the nozzle part, and Figures 1, 4 and 5 show the state with the earth cable connected.

[0052] As shown in Figures 1 to 5, the electrostatic spraying head 10 of the embodiment consists of a main body 12, a water-side electrode 14, an electrode connecting part 16, a liquid conduit 18, a main body cover 20, a nozzle 22, an induction electrode 24, and an arm 26.

[0053] The main body 12, liquid conduit 18, main body cover 20, nozzle 22, and arm 26 are insulators manufactured from insulating materials. Examples of insulating materials include polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics (alumina ceramics), and glass enamel.

[0054] The water-side electrode portion 14 and the electrode connecting portion 16 are conductors made of a conductive material. As the conductive material, metal is used, but conductive resins, fiber bundles, rubber, etc. other than metal may also be used, or composite materials combining these materials may be used.

[0055] As shown in the cross-sections in Figures 4 and 5, an electrode mounting hole 1210 is formed through the main body 12 in the direction of the head axis 35 (up and down direction), which is the direction of water flow. The water-side electrode portion 14 is inserted into the electrode mounting hole 1210 from the outflow side (bottom side). A liquid conduit portion 18 is positioned in a terminal chamber 1240 formed on the inflow side (top side) of the electrode mounting hole 1210. An electrode connecting portion 16, inserted through the liquid conduit portion 18, is screwed onto the upper end of the water-side electrode portion 14 that is exposed from the electrode mounting hole 1210 into the terminal chamber 1240. This secures the water-side electrode portion 14 to the electrode mounting hole 1210 and connects and secures the outflow side of the liquid conduit portion 18 to the inflow side of the water-side electrode portion 14.

[0056] Multiple screw holes 1640 are formed in the electrode connecting portion 16, and an earth cable is inserted via a waterproof cable connector 36 that is attached to a connector mounting hole 1270 formed laterally (perpendicular to the vertical direction, to the right in Figures 4 and 5) relative to the terminal chamber 1240 of the main body portion 12. 34 The terminal 38 is fixed and connected to one of the screw holes 1640 by a screw 40.

[0057] The liquid conduit section 18 is exposed to the outside through a main body cover section 20 provided at the inlet-side opening of the terminal chamber 1240, and pressurized water is supplied to it by an external water supply pump or the like. The pressure of the water supplied to the liquid conduit section 18 is adjusted, for example, within the range of 0.1 to 1.0 MPa.

[0058] A nozzle section 22 is attached to the outlet side (lower end side) of the water-side electrode section 14, which is mounted along the head axis 35 direction of the main body section 12. As shown in Figure 3, the nozzle section 22 has nozzle holes 2210 and releases water particles with a predetermined average particle size, for example, an average particle size of 10 to 300 μm. In this embodiment, a high-volume nozzle 50 and a low-volume nozzle 60 are attached to the nozzle section 22, but when they are not distinguished as a high-volume nozzle 50 and a low-volume nozzle 60, they may be referred to as the nozzle section 22.

[0059] In the open space on the outflow side of the nozzle section 22, an induction electrode section 24 is arranged using three arm sections 26, for example, as shown in Figure 3. The induction electrode section 24 is, for example, ring-shaped, and as shown in the cross-sections of Figures 4 and 5, it is formed by covering a conductive electrode core material 2410 with an insulating coating 2420. A support section 2440 is formed to extend upward after being taken out laterally (in a direction perpendicular to the vertical direction, to the left in Figure 1) from a predetermined position on the ring section 2430. A cable connection section 2450 connected to the electrode core material 2410 inside the ring is exposed at the tip of the support section 2440, and a voltage application cable is connected to the cable connection section 2450.

[0060] The electrode core material 2410 of the induction electrode section 24 is a conductor made of a conductive material. As the conductive material, metal is used, but conductive resins, fiber bundles, rubber, etc. other than metal may also be used, or a composite of these materials may be used.

[0061] Furthermore, as the insulating material for the insulating coating 2420 in the induction electrode section 24, for example, polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics (alumina ceramics), glass enamel, etc. are used.

[0062] As shown in the cross-sections in Figures 4 and 5, the ring portion 2430 of the induction electrode portion 24 is held in a predetermined position in the open space on the outflow side of the nozzle portion 22 by three arm portions 26, a fixing portion 28, and a fixing plate portion 30 that constitute the electrode holding structure 25. The pivot portion 2610 on the outer upper end of the arm portion 26 abuts against the outer corner of the groove portion 1280 of the main body portion 12, while the pressing portion 2620 on the inner upper end of the arm portion 26 is floating above the groove portion 1280.

[0063] When the fixing part 28 is rotated and screwed into the groove part 1280 side (upper side), the fixing plate part 30 is pressed upward, and the pressing part 2620 of the arm part 26 is pressed toward the groove part 1280. As a result, the arm part 26 rotates around the pivot point part 2610, and the holding part 2630 tilts inward. Then, due to the tilting of the three arm parts 26, the ring part 2430 of the induction electrode part 24 is pressed at three points by the holding part 2630 of the arm part 26, and the induction electrode part 24 is held in a state in which the central axis of the ring part 2430 is centered on the head axis 35.

[0064] Earth cable 34 The terminals are connected to one of the screw holes 1640 of the electrode connection part 16, and the voltage application cable is connected to the cable connection part 2450 of the induction electrode part 24. A predetermined voltage, such as a DC voltage, AC voltage, pulse voltage, etc., is applied between the water side electrode part 14 and the induction electrode part 24 as a predetermined adjustment range within the voltage range in which water particles can be charged, for example, in the range of +0.5kV to +20kV or -0.5kV to -20kV. A predetermined external electric field is formed around the ring part 2430 of the induction electrode part 24, and water particles emitted from the nozzle part 22 and passing through the ring part 2430 of the induction electrode part 24 are charged and dispersed.

[0065] For example, when a DC voltage is applied between the water-side electrode 14 and the induction electrode 24, if the polarity of the induction electrode 24 is positive when the water-side electrode 14 is set to a reference potential (earth potential, 0V), negatively charged water particles will be generated. If the polarity of the induction electrode 24 is negative when the water-side electrode 14 is set to a reference potential (earth potential, 0V), positively charged water particles will be generated. Furthermore, if the voltage applied between the water-side electrode 14 and the induction electrode 24 is in the range of +0.5kV to +20kV or -0.5kV to -20kV, the generation of spark discharge is prevented, and charged water particles are generated while ensuring safety.

[0066] When using the electrostatic spraying head 10 to remove dust from the air, for example at a building demolition site, the electrostatic water particles sprayed from the electrostatic spraying head 10 electrically attract and capture airborne dust particles, causing them to fall and be removed from the air. Furthermore, when the electrostatic spraying head 10 is installed in a fire extinguishing system, the electrostatic water particles sprayed from the electrostatic spraying head 10 electrically attract and capture airborne smoke particles, causing them to fall and providing a smoke extinguishing effect. In addition, the electrostatic water particles electrically attract to the object being extinguished, thereby improving the fire extinguishing performance.

[0067] The electrostatic spraying head 10 shown in Figures 1 to 4 has a nozzle section 22, which is a high-volume nozzle 50, attached and fixed using a nozzle holding section 32. On the other hand, the electrostatic spraying head 10 shown in Figure 5 has a nozzle section 22, which is a low-volume nozzle 60, attached and fixed to it. Furthermore, the diameter of the ring section 2430 of the induction electrode section 24 corresponds to the high-volume nozzle 50 and the low-volume nozzle 60, with the diameter of the ring section 2430 shown in Figure 5 (low-volume nozzle 60) being smaller than the diameter of the ring section 2430 shown in Figure 4 (high-volume nozzle 50). The other structures of the electrostatic spraying head in Figure 4 and the electrostatic spraying head in Figure 5 are basically the same.

[0068] [b. Components of the nozzle mounting structure] Next, the components constituting the nozzle mounting structure of the electrostatic spraying head will be described. The electrostatic spraying head 10 is equipped with a nozzle mounting structure that allows for the selective attachment of a high-volume nozzle 50 as shown in Figure 4 or a low-volume nozzle 60 as shown in Figure 5 as the nozzle section 22. The nozzle mounting structure is an arbitrary structure that allows for the selective attachment of a high-volume nozzle 50 or a low-volume nozzle 60 with different shapes, and can be realized, for example, using the structure on the outflow side of the water-side electrode section 14 and the nozzle holding section 32. Therefore, the water-side electrode section 14, the nozzle holding section 32, the high-volume nozzle 50 and the low-volume nozzle 60 for realizing the nozzle mounting structure will be described.

[0069] (b1. Water side electrode part) First, the water-side electrode section of the electrostatic spraying head will be described. For this description, please refer to Figure 6, which shows the water-side electrode section separately. Figure 6(A) shows the top view, Figure 6(B) shows the front view, Figure 6(C) shows the bottom view, and Figure 6(D) shows the cross-section along the cutting line bb in Figure 6(B).

[0070] As shown in Figure 6, the water-side electrode portion 14 is manufactured from a conductive material, such as a conductive metal, and has an internal flow path 1410 that penetrates it in the head axis direction (vertical direction). An external thread portion 1430 is formed on the outer circumference of the upper end side which is the inflow side, and a hexagonal bolt face 1420 is formed at a predetermined position in the middle of the outer circumference. The hexagonal bolt face 1420 fits into a hexagonal opening formed on the outflow side of the electrode mounting hole 1210 of the main body portion 12 when the water-side electrode portion 14 is inserted into the electrode mounting hole 1210 of the main body portion 12 shown in Figures 4 and 5 from the outflow side (bottom side), thereby realizing a structure that prevents the water-side electrode portion 14 from coming out of the electrode mounting hole 1210 and from rotating.

[0071] Furthermore, when the water-side electrode portion 14 is inserted into the electrode mounting hole 1210 of the main body portion 12 shown in Figures 4 and 5 from the outflow side (bottom side), the external threaded portion 1430 of the water-side electrode portion 14 is exposed on the inflow side of the electrode mounting hole 1210 of the main body portion 12 and receives the screwing of the electrode connecting portion 16.

[0072] A small-volume nozzle housing section 1460 having an internal threaded portion 1450 is formed at the outlet-side opening of the internal flow path 1410 of the water-side electrode section 14, and an external threaded portion 1440 is formed on the outer circumference of the outlet-side of the water-side electrode section 14.

[0073] (b2. Nozzle holding part) Next, the nozzle holder of the electrostatic spraying head will be described. For this description, please refer to Figure 7, which shows the nozzle holder removed from the unit. Figure 7(A) shows the top view, Figure 7(B) shows the front view, and Figure 7(C) shows the cross-section at the cutting line cc in Figure 7(B).

[0074] As shown in Figure 7, the nozzle holding portion 32 is manufactured as an insulating material, for example by injection molding of polyvinyl chloride resin, and has a through hole 3230 through which a stepped hole for housing the high-volume nozzle 50, the high-volume nozzle housing portion 3210 is formed. The high-volume nozzle housing portion 3210 has a larger diameter on the inlet side with an internal thread portion 3220 formed on its inner circumference, and a smaller diameter on the outlet side with a seal 3250 having a circular cross-section arranged in the stepped portion.

[0075] Furthermore, the outer circumference of the nozzle holding portion 32 is a hexagonal nut surface 3240, allowing for easy and simple screwing of the internal thread portion 3220 into the external thread portion 1440 of the water-side electrode portion 14 shown in Figure 6 using a tool such as a wrench. The through hole 3230 is sized to allow insertion of the low-water-volume nozzle 60.

[0076] (b3. High-volume nozzle) Next, we will explain the high-volume nozzle of the electrostatic spray head. For this explanation, please refer to Figure 8, which shows the high-volume nozzle removed from the unit. Figure 8(A) shows the front view, and Figure 8(B) shows the bottom view.

[0077] As shown in Figure 8, the high-flow nozzle 50 is a stepped cylindrical body, for example made of metal, in which a ceramic nozzle is arranged inside, with the diameter tapering toward the outlet side, corresponding to the shape of the stepped hole in the high-flow nozzle storage section 3210 formed in the nozzle holding section 32 shown in Figure 7. The inlet side has a large-diameter flange section 5020, and the outlet side has a small-diameter nozzle body section 5030.

[0078] The high-volume nozzle 50 has an internal channel that penetrates vertically and has a predetermined hole diameter, and a high-volume nozzle hole 5010 opens on the outlet side of the internal channel, as shown in Figure 8(B). Water is discharged from the high-volume nozzle hole 5010, and for example, the water discharged from the high-volume nozzle hole 5010 spreads out in a conical shape at a predetermined diffusion angle based on the nozzle opening shape and splits into water particles before being discharged. The discharge rate of the high-volume nozzle 50 is arbitrary, for example, set to 0.5 to 1.0 liters per minute.

[0079] (b4. Low-water-volume nozzle) Finally, the low-water-volume nozzle of the electrostatic spray head will be described. For this description, please refer to Figure 9, which shows the low-water-volume nozzle removed from the unit. Figure 9(A) shows the front view, and Figure 9(B) shows the bottom view.

[0080] As shown in Figure 9, the low-flow nozzle 60 has an inlet portion 6020, an external thread portion 6030, and a hexagonal bolt surface 6040 formed from the inlet side to the outlet side. Inside this, a ceramic nozzle is arranged, with an internal flow path that penetrates vertically and has a predetermined hole diameter. As shown in Figure 9(B), a low-flow nozzle hole 6010 opens on the outlet side of the internal flow path.

[0081] The inlet portion 6020 of the low-flow nozzle 60 has a shape corresponding to the low-flow nozzle housing portion 1460 formed on the outlet side of the water-side electrode portion 14 shown in Figure 6. Furthermore, the external thread portion 6030 of the low-flow nozzle 60 is screwed into the internal thread portion 1450 of the low-flow nozzle housing portion 1460 formed on the outlet side of the water-side electrode portion 14 shown in Figure 6.

[0082] Water is discharged from the opening of the low-volume nozzle hole 6010. For example, the water discharged from the low-volume nozzle hole 6010 spreads out in a conical shape at a predetermined diffusion angle based on the nozzle opening shape, splitting and being discharged as water particles. The discharge rate of the low-volume nozzle 60 can be any amount as long as it is less than that of the high-volume nozzle 50, but for example, it is set to 0.1 liters per minute.

[0083] [c. Assembly method for the nozzle of the electrostatic spraying head] Next, we will explain the nozzle assembly method for the electrostatic spray head, divided into two parts: the assembly method when a high-water-volume nozzle is selected and the assembly method when a low-water-volume nozzle is selected.

[0084] (c1. Nozzle assembly method for high-volume nozzles) First, the nozzle assembly method for the high-flow nozzle will be explained. In this explanation, please refer to Figure 10, which shows the first step of the high-flow nozzle assembly method, Figure 11, which shows the second step of the high-flow nozzle assembly method, and Figure 12, which shows the high-flow nozzle in its completed assembled state.

[0085] The first step in the nozzle assembly method for the high-flow nozzle 50 is to insert the high-flow nozzle 50 into the high-flow nozzle storage section 3210 of the nozzle holding section 32 from the inlet side, as shown in Figure 10, so that the seal 3250 is sandwiched between the side of the high-flow nozzle storage section 3210 and the flange portion 5020 of the high-flow nozzle 50. At this time, since the high-flow nozzle storage section 3210 is a stepped hole and the high-flow nozzle 50 has a flange portion 5020, the high-flow nozzle 50 is stored in the high-flow nozzle storage section 3210 in a state where it is prevented from coming out. Note that the seal 3250 may be placed in the high-flow nozzle storage section 3210 in advance, or it may be placed when the high-flow nozzle 50 is stored.

[0086] The second step in the nozzle assembly method for the high-flow nozzle 50 is as shown in Figure 11, by screwing the internal thread portion 3220 of the nozzle holding portion 32, which houses the high-flow nozzle 50, into the external thread portion 1440 on the outlet side of the water-side electrode portion 14, and by inserting a tool such as a wrench into the hexagonal nut surface 3240 of the nozzle holding portion 32 and turning it, the nozzle holding portion 32 is attached and fixed to the water-side electrode portion 14 with the nozzle holding portion 32 in contact with the seal 72 located on the outlet-side end face of the main body portion 12, as shown in Figure 12, thereby attaching the nozzle portion that constitutes the high-flow nozzle 50. Note that the seal 72 may be placed on the main body portion 12 in advance, or it may be placed when attaching and fixing the nozzle holding portion 32.

[0087] This mounting and fixing method ensures that the seal 72 seals the gap between the end faces of the main body 12 and the nozzle holding part 32, and the seal 3250 seals the gaps between the parts where the water-side electrode part 14, the nozzle holding part 32, and the high-volume nozzle 50 face each other. This prevents water released from the high-volume nozzle 50 through the internal flow path 1410 of the water-side electrode part 14 from leaking out through the gaps between the components.

[0088] This assembly process, consisting of the first and second steps, makes it possible to assemble the nozzle of the high-volume nozzle 50 simply and easily.

[0089] (c2. Nozzle assembly method for low-water-volume nozzles) Next, the nozzle assembly method for the low-water-volume nozzle will be described. In this description, please refer to Figure 13, which shows the third step of the low-water-volume nozzle assembly method, Figure 14, which shows the fourth step of the low-water-volume nozzle assembly method, and Figure 15, which shows the completed state of the low-water-volume nozzle assembly. Note that "third step" and "fourth step" are expressions used to match the description of the claims in the patent claims, and correspond to "first step" and "second step" in the low-water-volume nozzle assembly method.

[0090] The third step in the nozzle assembly method for the low-water-volume nozzle 60 is as shown in Figure 13, by screwing the external thread portion 6030 of the low-water-volume nozzle housing portion 1460 of the water-side electrode portion 14 into the internal thread portion 1450 of the low-water-volume nozzle housing portion 1460, and by inserting a tool such as a wrench into the hexagonal bolt surface 6040 of the low-water-volume nozzle 60 and turning it, the low-water-volume nozzle 60 is stored in the low-water-volume nozzle housing portion 1460 with the low-water-volume nozzle 60 attached and fixed to the water-side electrode portion 14, as shown in Figure 14.

[0091] The fourth step in the nozzle assembly method for the low-water-volume nozzle 60 is as shown in Figure 14: the low-water-volume nozzle 60 is inserted through the through hole 3230 of the nozzle holding part 32, which has a seal 3250 placed in the high-water-volume nozzle storage part 3210; the internal thread portion 3220 of the nozzle holding part 32 is screwed into the external thread portion 1440 on the outlet side of the water-side electrode part 14; and a tool such as a wrench is inserted into the hexagonal nut surface 3240 of the nozzle holding part 32 and turned, so that the nozzle holding part 32 is in contact with the seal 72 placed on the outlet side end face of the main body part 12, as shown in Figure 15, and the nozzle holding part 32 is attached and fixed to the water-side electrode part 14, thereby more firmly attaching the low-water-volume nozzle 60. 2 These may be pre-positioned in the high-volume nozzle storage section 3210 or the main body section 12, or they may be positioned when the nozzle holding section 32 is attached and fixed.

[0092] This mounting and fixing method ensures that the seal 72 seals the gap between the main body 12 and the contacting end face of the nozzle holding portion 32, and the seal 3250 seals the gaps between the water-side electrode portion 14, the nozzle holding portion 32, and the low-water-volume nozzle 60, thereby preventing water released from the low-water-volume nozzle 60 through the internal flow path 1410 of the water-side electrode portion 14 from leaking out through the gaps between the components.

[0093] Thus, the assembly process consisting of the third and fourth steps makes it possible to assemble the nozzle of the low-flow nozzle 60 in a simple and easy manner.

[0094] Furthermore, since the low-water-volume nozzle 60 is attached and fixed to the water-side electrode section 14 in the third step, the fourth step may be omitted. Also, when the fourth step is omitted, a seal may be placed to seal the gap between the water-side electrode section 14 and the low-water-volume nozzle 60.

[0095] [e. Variations of the present invention] Modifications of the electrostatic spraying head and nozzle assembly method according to the present invention will be described. In addition to the embodiments described above, the electrostatic spraying head and nozzle assembly method according to the present invention include the following modifications.

[0096] (Nozzle assembly method) In the above embodiment, when a high-volume nozzle is selected, the high-volume nozzle is stored in a nozzle storage section formed in the nozzle holding section, and the nozzle holding section is screwed onto the outlet end of the water-side electrode section to attach and fix the high-volume nozzle to the charged spraying head. When a low-volume nozzle is selected, the low-volume nozzle is screwed onto a nozzle storage section formed on the outlet side of the internal flow path of the water-side electrode section to attach and fix the low-volume nozzle to the charged spraying head. However, the nozzle assembly method is not limited to this.

[0097] For example, if a high-volume nozzle is selected, the high-volume nozzle can be attached and fixed to the electrostatic spraying head by screwing it into a nozzle storage section formed on the outlet side of the internal flow path of the water-side electrode section. If a low-volume nozzle is selected, the low-volume nozzle can be stored in a nozzle storage section formed in the nozzle holding section, and the low-volume nozzle can be attached and fixed to the electrostatic spraying head by screwing the nozzle holding section to the outlet end of the water-side electrode section.

[0098] (How to replace the nozzle) Furthermore, if a water discharge problem occurs in a high-volume nozzle or low-volume nozzle that is selected and fixed to the electrostatic spray head, for example, due to a clogged nozzle hole, the nozzle can be replaced with an unused nozzle or the nozzle from which the cause of the problem has been removed is reinstalled. In this nozzle replacement method, the area around the nozzle is disassembled in the reverse order of the assembly method described above, the nozzle is removed and replaced with an unused nozzle, or the cause of the problem is removed and the nozzle is reassembled according to the nozzle assembly method described above.

[0099] Furthermore, it is possible to replace either the high-volume nozzle or the low-volume nozzle, which is selected and fixed to the electrostatic spray head, with the other type of nozzle. The procedure in this case is the same as the nozzle replacement method when a nozzle malfunctions, as described above.

[0100] (others) Furthermore, the present invention is not limited to the embodiments described above, and includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values ​​shown in the embodiments described above. [Explanation of symbols]

[0101] 10: Electrostatic dispersal head 12: Main body 1210: Electrode mounting hole 1240:Terminal room 1270 : Connector mounting holes 1280: Groove 14: Water side electrode part 1410: Internal flow path 1420: Hexagonal bolt face 1430, 1440: External thread section 1450: Internal thread section 1460: Low-water-volume nozzle storage compartment 16: Electrode connection part 18:Liquid conduit section 20: Main body cover 22: Nozzle section 2210: Nozzle hole 24: Induction electrode part 2410: Electrode core material 2420: Insulating coating 2430: Ring section 2440: Support part 2450: Cable connection part 25: Electrode holding structure 26: Arm section 2610: Pivot point 2620: Pressing part 2630: Holding part 28: Fixed part 30: Fixing plate section 32: Nozzle holding part 3210: High-volume nozzle storage section 3220: Internal thread section 3230: Through hole 3240: Hexagonal nut surface 3250: Seal 34: Ground cable 35: Head axis 36: Cable connector 38: Terminals 40: Screw 50: High-volume nozzle 5010: High-volume nozzle hole 5020: Tsuba (sword guard) 5030: Nozzle body 60: Low-water-flow nozzle 6010: Low-water-volume nozzle hole 6020:Inflow section 6030: External thread section 6040: Hexagonal bolt face 72: Seal

Claims

1. A charged spraying head that sprays charged liquid particles, which are released from a nozzle, onto a target area, The nozzle holding section from which the liquid particles are released, A first liquid volume nozzle that can be positioned inside the nozzle holding portion, A second liquid volume nozzle, which can be positioned outside the nozzle holding portion and has a different liquid volume and shape from the first liquid volume nozzle, A nozzle mounting structure that allows for the selective attachment of the first liquid volume nozzle and the second liquid volume nozzle, A charged spraying head characterized by having the following features.

2. A charged spraying head that sprays charged liquid particles onto a target area, The main body and A nozzle unit for dispersing the charged liquid particles, When a predetermined voltage is applied to charge the liquid particles discharged from the nozzle, one of the electrodes is formed, and an internal channel for supplying liquid supplied from the outside to the nozzle is passed through the water-side electrode section, A nozzle mounting structure is provided on the outlet side of the water-side electrode section, and the nozzle section is capable of selectively attaching a first liquid volume nozzle and a second liquid volume nozzle having different discharge liquid volumes and shapes. Equipped with, The nozzle mounting structure is, A nozzle holding portion is formed that penetrates from the water-side electrode portion to the outside which the spraying target area is located, and can be held at the outflow-side end of the water-side electrode portion, A nozzle storage section located on the outlet side of the nozzle holding section and capable of housing the first liquid volume nozzle or the second liquid volume nozzle, A charged spraying head characterized by having the following features.

3. A charged spraying head for spraying charged liquid particles onto a target area, wherein charged liquid particles are charged into a charged liquid particle state, The main body and A nozzle unit for dispersing the charged liquid particles, When a predetermined voltage is applied to charge the liquid particles discharged from the nozzle, one of the electrodes is formed, and an internal channel for supplying liquid supplied from the outside to the nozzle is passed through the water-side electrode section, A nozzle mounting structure is provided on the outlet side of the water-side electrode section, and the nozzle section is capable of selectively attaching a first liquid volume nozzle and a second liquid volume nozzle having different discharge liquid volumes and shapes. Equipped with, The nozzle mounting structure is, A nozzle holding portion is formed with a through-hole and can be attached and fixed to the outlet end of the water-side electrode portion, A first nozzle storage section is formed in the through hole of the nozzle holding section and houses the first liquid volume nozzle, A second nozzle housing is formed on the outflow side of the internal flow path of the water-side electrode portion and houses the second liquid volume nozzle in a fixed and attached state, A charged spraying head characterized by having the following features.

4. In the electrostatic spraying head according to claim 3, The electrostatic spraying head is characterized in that the through-hole of the nozzle holding portion is sized to allow the second liquid volume nozzle to be inserted.

5. In the electrostatic spraying head according to claim 3, The nozzle mounting structure further includes, A charged spraying head characterized by having a sealing member that seals the internal flow path of the water-side electrode section, the space between the first nozzle storage section of the nozzle holding section and the first liquid-volume nozzle when the first liquid-volume nozzle is selected, and the space between the internal flow path of the water-side electrode section and the second liquid-volume nozzle when the second liquid-volume nozzle is selected.

6. In the electrostatic spraying head according to claim 3, The water-side electrode portion includes a first mating receiving portion on the outer circumference of the outlet-side end, and a second mating receiving portion in the second nozzle housing portion formed in the internal flow path on the outlet side. The nozzle holding portion includes a first mating portion that mats with the first mating receiving portion on the inflow side of the through hole, and the first nozzle housing portion is formed as a stepped hole that is reduced in diameter toward the outflow side. The first liquid volume nozzle has a stepped shape that is tapered toward the outlet side, corresponding to the stepped hole in the first nozzle housing, The electrostatic spraying head is characterized in that the second liquid volume nozzle has a second mating portion on the outer circumference of the inlet end that mats with the second mating receiving portion.

7. In the electrostatic spraying head according to any one of claims 1 to 6, The electrostatic spraying head is characterized in that the first liquid volume nozzle is a nozzle that discharges a larger amount of liquid than the second liquid volume nozzle.

8. A nozzle assembly method for a charged spraying head, which includes a nozzle mounting structure that allows for the selective attachment of a first liquid volume nozzle or a second liquid volume nozzle having different liquid discharge volumes and shapes to a nozzle section that discharges charged liquid particles in order to spray charged liquid particles onto a target area, The nozzle mounting structure is, When a predetermined voltage is applied to charge the liquid particles discharged from the nozzle, one of the electrodes is formed, and it can be attached and fixed to the outlet end of the water-side electrode section, which is formed through which an internal flow path for supplying liquid supplied from the outside to the nozzle is passed, and a nozzle holding section formed through which a through hole is passed, A first nozzle storage section is formed in the through hole of the nozzle holding section and houses the first liquid volume nozzle, A second nozzle housing is formed on the outflow side of the internal flow path of the water-side electrode portion and houses the second liquid volume nozzle in a fixed and attached state, Equipped with, If the first liquid volume nozzle is selected, The first step is to house the first liquid volume nozzle in the first nozzle storage section of the nozzle holding section, A second step involves attaching and fixing the nozzle holding part, which houses the first liquid volume nozzle, to the outlet end of the water-side electrode part. Includes, If the second liquid volume nozzle is selected, A method for assembling a nozzle for an electrostatic spraying head, characterized by including a third step of attaching and fixing the second liquid volume nozzle to the second nozzle storage section of the internal flow path of the water-side electrode section.

9. In the method for assembling a nozzle of an electrostatic spraying head according to claim 8, The water-side electrode portion includes a first mating receiving portion on the outer circumference of the outlet-side end, and a second mating receiving portion in the second nozzle housing portion formed in the internal flow path on the outlet side. The nozzle holding portion includes a first mating portion that mats with the first mating receiving portion on the inflow side of the through hole, The second liquid volume nozzle is provided with a second mating portion on the outer circumference of the inlet end that mats with the second mating receiving portion, The second step involves fitting the first mating portion of the nozzle holding portion into the first mating receiving portion of the water-side electrode portion, thereby attaching and fixing the nozzle holding portion to the water-side electrode portion. The third step is a method for assembling a nozzle for a charged spraying head, characterized in that the second liquid volume nozzle is fitted into the second mating receiving portion of the water-side electrode portion, thereby storing the second liquid volume nozzle in a state where it is attached and fixed to the second nozzle storage portion.

10. In the method for assembling a nozzle of an electrostatic spraying head according to claim 8, If the first liquid volume nozzle is selected, the first liquid volume nozzle is stored in the first nozzle storage portion via a sealing member in the first step so that after the completion of the second step, the internal flow path of the water-side electrode portion, the first nozzle storage portion of the nozzle holding portion, and the first liquid volume nozzle are sealed. A method for assembling a nozzle for a charged spraying head, characterized in that, when the second liquid volume nozzle is selected, the second liquid volume nozzle is stored in the second nozzle storage section via a sealing member in the third step so that the space between the internal flow path of the water-side electrode section and the second liquid volume nozzle is sealed after the completion of the third step.

11. In the method for assembling a nozzle of an electrostatic spraying head according to claim 8, The through-hole in the nozzle holding portion is sized to allow the second liquid volume nozzle to be inserted. If the second liquid volume nozzle is selected, A method for assembling a nozzle for a charged spraying head, characterized by including a fourth step, following the third step, of inserting the second liquid volume nozzle through the through hole of the nozzle holding part and attaching and fixing the nozzle holding part to the water side electrode part.

12. A method for assembling a nozzle for an electrostatic spraying head according to claim 11, A method for assembling a nozzle for an electrostatic spraying head, characterized in that, after the completion of the fourth step, a sealing member is placed in the first nozzle housing in the fourth step so that the internal flow path of the water-side electrode section, the first nozzle housing section of the nozzle holding section, and the second liquid volume nozzle are sealed.

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