JP2013139999A - Liquid jet nozzle, and liquid atomizing device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid jet nozzle that can be manufactured inexpensively and has a minute jetting hole.SOLUTION: A liquid jet nozzle 22 includes a nozzle body 221 and a tubular element 222 mounted in the nozzle body 221. The nozzle body 221 has a liquid passage 221d that extends from a liquid inlet 221b opened at a back end to a tip hole 221c. The tubular element 222 is inserted into the tip hole 221c of the nozzle body 221, and its outer peripheral surface is fixed to the inner circumferential surface of the tip hole 221c with an adhesive 223. The liquid jet nozzle 22 jets a liquid flowed into the nozzle body 221 from the liquid inlet 221b through the tubular element 222.

Description

  The present invention relates to a liquid jet nozzle suitable for generating fine droplets to be sprayed (sprayed) in an atmosphere and a liquid spray apparatus including the same.

  As a conventional liquid spraying device, a nozzle device having a single fluid nozzle is known (see Patent Document 1). The nozzle device described in Patent Document 1 sprays atomized water droplets having a very small droplet diameter in a mist form by separating coarse droplets in the outer peripheral area of the spray in the vicinity of the spray hole of one fluid nozzle. A single fluid nozzle having an orifice diameter (a nozzle hole diameter) of about 0.2 mm is used.

JP 2011-161309 A

By the way, in a nozzle having fine injection holes such as the nozzle used in Patent Document 1, there is a possibility that the original injection performance cannot be exhibited due to clogging of foreign matters in the injection holes. Therefore, for example, it is conceivable that the nozzle is used as a replacement part so that the nozzle can be replaced periodically or when the injection performance is deteriorated.
However, in general, the processing cost for forming a fine hole (for example, a fine hole having a diameter of 0.3 mm or less) is high. Therefore, a nozzle having a fine injection hole also has a high component cost (manufacturing cost). Therefore, simply using the nozzle as a replacement part is not preferable because it causes a significant increase in running cost. For this reason, a nozzle that can be manufactured at a lower cost is required.
Such a requirement is also required for nozzles having fine nozzle holes regardless of whether or not they are replacement parts.

The present invention has been made paying attention to such a situation, and an object of the present invention is to provide a liquid jet nozzle that has fine nozzle holes and can be manufactured at a lower cost than conventional ones.
It is another object of the present invention to provide a liquid spraying apparatus that can efficiently and stably spray fine droplets that hardly get wet.

  According to one aspect of the present invention, a liquid jet nozzle includes a nozzle body having a liquid passage extending from a liquid inlet opening at a rear end to a tip hole, and a tubular member attached to the tip hole of the nozzle body. The liquid that has flowed into the nozzle body from the liquid inlet is ejected through the tubular member.

  According to another aspect of the present invention, a liquid spraying apparatus includes a nozzle body having a liquid passage extending from a liquid inlet opening at a rear end to a tip hole, and a tubular member attached to the tip hole of the nozzle body. And a liquid ejecting nozzle that ejects the liquid that has flowed into the nozzle body from the liquid inlet through the tubular member, and at least a part of the liquid ejecting nozzle is formed as a rough surface. A liquid to be collided by the liquid ejected from the nozzle, and the liquid ejected from the liquid ejecting nozzle collides with the rough surface of the collided body to make it fine and spray.

  According to the liquid injection nozzle, the tubular member is attached to the tip hole of the nozzle body, and the liquid flowing into the nozzle body is injected through the tubular member. It is possible to manufacture a liquid injection nozzle that does not need to be opened and has fine injection holes at a relatively low cost (that is, it is possible to inject liquid by making the liquid finer).

According to the liquid spraying device, it is possible to generate more fine liquid droplets by causing the liquid ejected from the liquid ejecting nozzle having the fine nozzle holes to collide with the collision target. For this reason, it is possible to efficiently perform the spraying of fine droplets that hardly get wet.
Further, since the liquid injection nozzle having fine injection holes can be manufactured at low cost, the running cost can be suppressed even if the liquid injection nozzle is used as a replacement part. Thereby, it becomes possible to perform stable spraying over a long period using the liquid jet nozzle as a replacement part.

It is a figure which shows the whole structure of the liquid spraying apparatus by embodiment. It is sectional drawing which shows schematic structure of the spraying unit which comprises the said liquid spraying apparatus. It is an expanded sectional view of a nozzle unit. It is an expanded sectional view of a liquid jet nozzle. It is a figure which shows the modification of a liquid injection nozzle. It is a figure which shows the modification of the liquid spraying apparatus by embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows the overall configuration of a liquid spray apparatus to which a liquid jet nozzle according to an embodiment of the present invention is applied. As shown in FIG. 1, the liquid spray apparatus 1 includes a spray unit 2, a liquid supply unit 4 that supplies liquid to the spray unit 2 via a liquid supply pipe 3, and a spray unit 2 via an air supply pipe 5. And a blower unit 6 for supplying air.
Although three spray units 2 are shown here, the present invention is not limited to this, and the liquid spray device 1 can include any number of spray units 2.

  The spray unit 2 is arranged, for example, in a room (a liquid spray target space) where liquid spray is performed. The liquid spray unit 2 refines the liquid supplied by the liquid supply unit 4, and supplies the refined liquid (hereinafter also referred to as “fine atomized liquid droplet”) together with the air supplied by the blower unit 6 to the chamber. Release into the atmosphere of the (target space).

FIG. 2 is a cross-sectional view showing a schematic configuration of the spray unit 2.
As shown in FIG. 2, the spray unit 2 is provided corresponding to the nozzle unit 20 in the housing 10, the nozzle unit 20 disposed in the housing 10, and injected from the nozzle unit 20. A body 30 to which the liquid collides.

The housing 10 accommodates the nozzle unit 20 and the collision target 30. An inlet 11 for introducing air (outside air) into the housing 10 is formed on the back surface of the housing 10, and air introduced into the housing 10 is discharged to the outside of the housing 10 on the front surface of the housing 10. A discharge port 12 is formed.
A blower duct (air supply duct) 13 to which an air supply pipe 5 extending from the blower unit 6 is connected is attached to the rear outside of the housing 10, and the air sent out by the blower unit 6 is sent to the air supply pipe 5 and the blower. It is supplied to the spray unit 2 through the duct 13. The supplied air is introduced into the housing 10 from the introduction port 11, passes through the housing 10, and is discharged from the discharge port 12.
In addition, a drain port (drain port) 14 for discharging the liquid stored in the housing 10 is provided at the bottom of the housing 10.

The nozzle unit 20 ejects the liquid supplied from the liquid supply unit 4 via the liquid supply pipe 3 toward the collision target 30. The liquid supply pipe 3 extends through one side surface of the housing 10 to an intermediate position in the housing 10, and a nozzle unit 20 is connected to an end of the liquid supply pipe 3 extending into the housing 10. Here, the nozzle unit 20 is arranged to eject liquid toward the back side of the housing 10, in other words, in the direction opposite to the flow of air from the inlet 11 to the outlet 12.
The configuration of the nozzle unit 20 will be described later.

  The collision target 30 is attached to the housing 10 via a support bracket 31, and is disposed on the back side of the housing 10 with respect to the nozzle unit 20 in the housing 10. At least a part of the surface of the collision target 30 on the nozzle unit 20 side is formed as a rough surface 30a, and the liquid ejected by the nozzle unit 20 collides with the rough surface 30a. The liquid ejected from the nozzle unit 20 collides with the rough surface 30a of the collision target 30, thereby further miniaturizing and generating fine droplets.

Here, the rough surface 30a of the collision target 30 only needs to be formed as a surface intentionally having unevenness by roughening or the like, and the unevenness may be a regular rough surface, or unevenness is not good. It may be a regular rough surface. For example, the rough surface 30a can be shaped according to the “file surface”. It has been confirmed by experiments that such a rough surface 30a can generate more fine droplets than a flat surface.
Alternatively, the collision target body 30 and the rough surface forming member may be formed separately, and the collision target body 30 may be configured by attaching the rough surface forming member to the collision target body main body. The collision target 30 is configured to be attachable to and detachable (exchangeable) from the housing 30.

  In the spray unit 2, the number of the nozzle units 20 disposed in the housing 10 can be arbitrarily set, and the same number of the collision target bodies 30 as the nozzle units 20 is provided.

Returning to FIG. 1, the liquid supply unit 4 selectively supplies water or functional water to the spray unit 2. The liquid supply unit 4 includes a high-pressure pump 41, a water tank 42 that stores water, and a functional water tank 43 that stores functional water.
The functional water is not particularly limited, but in the present embodiment, a weak alkaline alkaline sterilization deodorant known as a trade name “Peasguard” is used as the functional water. It is confirmed that this sterilization and deodorizing liquid has a sterilizing effect on various viruses and various bacteria, has a deodorizing function, has no problem in terms of safety, and has almost no risk of odor and metal corrosion. Has been. In addition, you may use the disinfection deodorizing liquid which consists of the aqueous solution containing sodium hypochlorite, calcium hydroxide, and sodium carbonate, or what is called hypochlorous acid water as said functional water.

  The suction port of the high-pressure pump 41 is connected to the water tank 42 via the suction pipe 44 and the water supply pipe 45, and is connected to the functional water tank 43 via the suction pipe 44 and the functional water supply pipe 46. The discharge port of the high-pressure pump 41 is connected to the spray unit 2 (nozzle unit 20 thereof) via the liquid supply pipe 3. The high-pressure pump 41 only needs to be able to discharge the sucked liquid, that is, water or functional water (disinfecting and deodorizing liquid) at a relatively high pressure (for example, about 6 to 8 MPa or more). The structure and the like are not particularly limited.

  The water supply pipe 45 is provided with a first low-pressure pump 47a and a first valve 48a, and the functional water supply pipe 46 is provided with a second low-pressure pump 47b and a second valve 48b. Then, the operating state of the first and second low-pressure pumps 47a and 47b and the opening and closing state of the first and second valves 48a and 48b are appropriately adjusted, so that the high-pressure pump 41 has water or a function in the water tank 42. Functional water (disinfecting and deodorizing liquid) in the water tank 43 is selectively supplied.

  The blower unit 6 includes a blower (not shown) and supplies air to the spray unit 2 via the air supply pipe 5. Instead of the blower unit 6, a blower fan may be directly attached to the inlet 211 formed in the housing 10 of the spray unit 2.

When the liquid spraying apparatus 1 is activated, the liquid supply unit 4 sends water or functional water by the high-pressure pump 41, and the blower unit 6 sends air by the blower.
The liquid sent out by the high-pressure pump 41 is supplied to the spray unit 2 through the liquid supply pipe 3. The liquid supplied to the spray unit 2 is sprayed toward the rough surface 30a of the collision target 30 by the nozzle unit 20 in the housing 10 and collides with the rough surface 30a of the collision target 30 to be refined (fine). Droplets are generated).

  On the other hand, the air sent out by the blower unit 6 is supplied to the spray unit 2 through the air supply pipe 5 and the blower duct 14, and is introduced into the housing 10 from each inlet 11 formed in the housing 10.

  Among the liquids (miniaturized liquid droplets) refined by colliding with the rough surface 30a of the collision target 30, those having a relatively large particle size fall (fall down) and are stored at the bottom of the housing 21. A small diameter floats in the housing 10. Then, the fine droplet having a small particle size floating in the housing 10 is discharged together with the air when the air (outside air) introduced into the housing 10 from the introduction port 11 is discharged from the discharge port 12. The

At this time, if the air (outside air) introduced into the housing 10 contains contaminants such as dust, the contaminants are adsorbed by the fine droplets floating in the housing 10, and this contamination The miniaturized droplets on which objects are adsorbed become heavy and fall (fall down).
As a result, the spray unit 2 discharges finer droplets, that is, finer droplets with little floating time and a long floating time, together with fresh air from which contaminants have been removed. (Sprayed).

  Here, the nozzle unit 20 injects the liquid in the direction opposite to the air flow from the inlet 11 to the outlet 12, and the collision target 30 is located on the back side of the housing 10, that is, the outlet 12. It is arranged in the position away from. For this reason, the refined droplets carried near the discharge port 12 by the air flow adhere to the relatively large droplets generated by the collision with the collision target 30 and fall. And the fine droplets can be effectively discharged (sprayed).

Next, the configuration of the nozzle unit 20 will be described in detail with reference to FIGS.
The nozzle unit 20 in the present embodiment includes a liquid jet nozzle having fine nozzle holes in order to efficiently generate fine droplets.
FIG. 3 is an enlarged cross-sectional view of the nozzle unit 20. As shown in FIG. 3, the nozzle unit 20 includes a nozzle case 21 and a liquid ejection nozzle 22 accommodated in the nozzle case 21.

The nozzle case 21 includes a first case 211 attached to the end of the liquid supply pipe 3 and a second case 212 that is screwed to the first case 211.
The first case 211 has a cylindrical portion 211a that accommodates the liquid ejection nozzle 22 on one side (right side in the drawing) in the longitudinal direction (axial direction). A male screw portion is formed on the outer peripheral surface of the cylindrical portion 211a.

A mounting portion 211b that fits to the outer peripheral surface of the end portion of the liquid supply pipe 3 is formed in a recessed manner on the other end surface (left side in the drawing) of the first case 211. A female thread portion corresponding to a male thread portion formed on the outer peripheral surface of the end portion of the liquid supply pipe 3 is formed on the inner peripheral surface of the mounting portion 211b. The first case 211 can be connected to the liquid supply pipe by screw fastening. 3 can be fixed.
In addition, a filter housing hole 211c for housing the filter 23 is formed in the bottom of the recessed mounting portion 211b. The filter housing hole 211c and the inside of the tubular portion 211a communicate with each other through a through hole 211d. .

  A mounting portion 212 a that fits to the outer peripheral surface of the cylindrical portion 211 a of the first case 211 is formed in a recessed manner on the end surface of the second case 212 on the first case 211 side. A female thread portion corresponding to the external thread portion formed on the outer peripheral surface of the cylindrical portion 211a of the first case 211 is formed on the inner peripheral surface of the mounting portion 212a. The second case 212 is formed by screw fastening. It can be fixed to the first case 211. In addition, a concave portion 212b corresponding to the shape of the tip of the liquid jet nozzle 22 is formed on the bottom surface of the mounting portion 212a formed with a recess, and a through hole 212c communicating with the outside is formed in the center of the concave portion 222b. .

The liquid ejection nozzle 22 is configured as a one-fluid nozzle, and ejects the liquid supplied by the liquid supply unit 4 toward the back side of the housing 11.
FIG. 4 is an enlarged cross-sectional view of the liquid jet nozzle 22.
As shown in FIG. 4, the liquid ejecting nozzle 22 includes a nozzle main body 221 and a tubular member 222 attached to the nozzle main body 221.

A flange portion 221 a is provided at the rear end of the nozzle body 221. The nozzle body 221 is formed with a liquid passage 221d extending from the liquid inlet 221b that opens to the rear end to the tip hole 221c. The tip hole 221c is much smaller than the liquid inlet 221b, and is formed to have a diameter of, for example, 1 to 2 mm. For this reason, the liquid passage 221d includes a section in which the passage sectional area gradually decreases so that the liquid flowing in from the liquid inlet 221b smoothly flows to the tip hole 221c.
The liquid passage 221d only needs to connect (communicate with) the liquid inlet 221b and the tip hole 221c, and can have an arbitrary length. Further, the diameter of the tip hole 221c is not limited to the above-described dimensions, and may be a dimension that can be formed at a certain low cost.

The tubular member 222 is attached to the tip hole 221 c of the nozzle body 221. Specifically, the tubular member 222 is inserted into the tip hole 221c so that a part thereof protrudes from the nozzle body 221, and the outer peripheral surface thereof is fixed to the inner peripheral surface of the tip hole 221c by the adhesive 223. The reason why a part of the tubular member 222 protrudes from the nozzle body 221 is mainly to enable easy and stable attachment (adhesion) of the tubular member 222 to the tip hole 221c. Therefore, it goes without saying that the entire tubular member 222 may be accommodated in the tip hole 221c so that the tubular member 222 does not protrude from the nozzle body 221.
This tubular member 222 (hollow part thereof) constitutes an injection hole of the liquid injection nozzle 22.

Here, the inner diameter of the tubular member 222 is, for example, φ0.05 to 0.5 mm, preferably 0.08 to 0.3 mm. This is because it is difficult to stably form the nozzle hole of this size in the nozzle body 221 and the cost thereof is high, so that the merit of using the tubular member 222 is great.
The inner diameter of the tubular member 222 is appropriately selected according to the properties of the liquid, the target space, and the like, but in this embodiment, the tubular member having an inner diameter of φ0.1 mm (outer diameter of φ0.2 to 0.3 mm). 222 is used. When the tubular member 222 of this size (inner diameter) is used, that is, when the injection hole of the liquid injection nozzle 22 is about φ0.1 mm, it is preferable for generating fine droplets that hardly wet people or objects. This is because it has been confirmed by experiments.

As the tubular member 222 having such a small inner diameter, for example, a microtubule for an injection needle can be used. A large number of such ultrafine tubes are circulated and relatively low in cost, and thus are suitable as the tubular member 222.
In addition, the outer diameter of such an ultrathin tube is usually smaller than the inner diameter (for example, φ1 to 2 mm) of the tip hole 221c of the nozzle body 221 that can be formed at a relatively low cost. An agent is used to bond the two while filling the gap between the outer peripheral surface of the tubular member 222 and the inner peripheral surface of the tip hole 221c.

  Since the cross-sectional area of the tubular member 222 is very small, if the outer peripheral surface is fixed to the inner peripheral surface of the tip hole 221c by the adhesive 223, the tubular member 222 is separated from the nozzle body 221 by the pressure of the flowing liquid. There is no such thing as going off.

  When assembling the nozzle unit 20, the liquid ejection nozzle 22 is inserted from the flange portion 221 a side into the cylindrical portion 211 a of the first case 211, and the mounting portion 212 a of the second case 212 is inserted into the first case 211. The nozzle unit 20 is completed by screwing the cylindrical portion 211a. At this time, the distal end side of the liquid jet nozzle 22 (nozzle body 221) is accommodated in the recess 212b of the second case 212, and the tubular member 222 protruding from the nozzle body 221 is disposed in the through hole 212c of the second case 212. . The completed nozzle unit 20 is connected to the liquid supply pipe 3 by screwing the inner peripheral surface of the mounting portion 211 b of the first case 211 and the outer peripheral surface of the end of the liquid supply pipe 3.

  In the nozzle unit 20, a ring-shaped elastic seal member 24 such as rubber packing is disposed between the flange portion 221 a of the liquid jet nozzle 22 and the bottom surface of the cylindrical portion 211 a of the first case 211 ( 3), the elastic sealing member 24 seals the gap to suppress liquid leakage, and the liquid ejecting nozzle 22 is firmly fixed in the nozzle case 21.

  The nozzle unit 20 connected to the liquid supply pipe 3 is supplied with liquid by the liquid supply unit 4. The supplied liquid is introduced into the nozzle unit 20 (nozzle case 21) from the mounting portion 211b of the first case 211, and after the foreign matter is removed by the filter 23, the inside of the cylindrical portion 211a passes through the through hole 211d. That is, it is supplied to the liquid jet nozzle 22.

  The liquid ejecting nozzle 22 injects the supplied liquid from the liquid inflow port 221b into the nozzle body 221 and ejects it through the tubular member 222 attached to the tip hole 211c. The inner diameter of the tubular member 222 is as very small as φ0.1 mm. As a result, the liquid ejected from the tubular member 222 collides with the rough surface 30a of the collision target 30 so that it hardly wets people or objects. More crystallization droplets can be generated.

  According to the liquid jet nozzle 22 described above, the nozzle body 221 is formed with the tip hole 221c having a certain size (for example, φ1 to 2 mm), and the tip hole 221c has a small inner diameter (for example, φ0.1 mm). Since the tubular member 222 (for example, an ultra-thin tube for an injection needle) is attached, it is not necessary to open a fine hole (jet hole) having a high processing cost in the nozzle body 221, and the fine nozzle hole is relatively low cost. It is possible to manufacture a liquid jet nozzle having the following.

  Further, by fixing the inner peripheral surface of the tip hole 221c and the outer peripheral surface of the tubular member 222 with an adhesive, the gap between the inner peripheral surface of the tip hole 221c and the outer peripheral surface of the tubular member 222 can be filled. The tip hole 221c can be formed to be large to some extent, and the tip hole 221c does not require high accuracy. Furthermore, by projecting a part of the tubular member 222 from the nozzle body 221, it is possible to easily attach the tubular member 222 to the nozzle body 221 (tip hole 221c). Thereby, the manufacturing cost of the liquid jet nozzle 22 can be further reduced.

  Further, in the liquid spraying apparatus 1 described above, the nozzle unit 20 is connected to the liquid supply pipe 3 by screw fastening, and the nozzle unit 20 (liquid ejection nozzle 22) can be attached to and detached from the liquid supply pipe 3. By using the nozzle unit 20 (liquid jet nozzle 22) as a replacement part, stable spraying performance can be ensured over a long period of time. This also applies to the collision target 30. That is, by using the colliding body 30 as a replacement part, the colliding body 30 having a different roughness of the rough surface 30a is selectively used to perform the spray performance, in particular, the fine droplets sprayed in the target space. The diameter can be adjusted.

  In the above embodiment, the liquid spray device 1 selectively sprays water or functional water (bacteria-removing deodorant liquid), but the liquid spray device 1 sprays only one of them. You may comprise. That is, the liquid spraying device 1 can be a humidifying device or a cooling device, or a sterilizing and deodorizing device.

Further, in the above-described embodiment, the liquid ejecting nozzle 22 and the collided body 30 are provided separately. However, these are integrated, that is, the liquid ejecting nozzle 22 has a configuration corresponding to the collided body 30. Also good. In this case, for example, as shown in FIG. 5, a member 224 having an L-shaped cross section formed so as to rise vertically from the nozzle body 221 in the liquid ejecting direction is attached to the nozzle body 221. The liquid ejecting nozzle 22 is configured to cause the liquid ejected from the tubular member 222 to collide with the rising portion (collision portion) 224a. Of course, the impacted part may be formed integrally with the nozzle body 221.
If it does in this way, it can apply to said liquid spraying apparatus 1, Of course, spraying of a refinement | miniaturization droplet can be performed only with the liquid injection nozzle 22. FIG.

  Further, in the spray unit 2, the interval between the nozzle unit 20 (liquid jet nozzle 22) and the collision target 30 may be changed. For example, as shown in FIG. 6, the position of the collision object 30 with respect to the support bracket 31 can be changed. In this way, it is possible to adjust the particle size of the fine droplets sprayed (released) from the spray unit 2 while using the nozzle unit 20 (liquid spray nozzle 22) and the collision target 30 of the same combination. become. The position of the collision target 30 may be fixed and the position of the nozzle unit 20 may be changed.

Basically, the larger the gap between the nozzle unit 20 (liquid jet nozzle 22) and the collision target 30, the larger the particle size of the fine droplets sprayed (released) from the spray unit 2.
Therefore, for example, when the floor of the target space is not desired or should not be wet, or when it is desired to spray a small amount in a relatively small space, the distance between the nozzle unit 20 (liquid spray nozzle 22) and the collision target 30 is determined. The liquid is sprayed as ultrafine particles (for example, particles having a size of 5 μm or less). Examples of such cases include water spray for improving the environment of plant seedling and mushroom cultivation, and water spray for increasing the temperature and humidity of the refrigerator.
On the other hand, when the floor of the target space may be wet to some extent or when it is desired to perform a large amount of spraying in a large space, the interval between the nozzle unit 20 (liquid spray nozzle 22) and the collision target 30 is relatively increased. The liquid is sprayed with relatively large particles (for example, particles of 10 μm or more). Examples of such cases include water spraying for countermeasures against static electricity in a printing factory and the like, and spraying of functional liquids (antibacterial and deodorant liquids) as countermeasures against foot-and-mouth disease.

  Furthermore, the spray unit 2, the liquid supply unit 4, and the blower unit 6 (or blower fan) may be placed on a carriage or the like to make the liquid spray device 1 portable. In this case, the entire liquid spraying apparatus 1 can be moved to a desired location to spray at least one of water and functional water, which is convenient.

  As mentioned above, although preferable embodiment and its modification example of this invention were described, this invention is not limited to these, Of course, a further deformation | transformation and change are possible based on the technical idea of this invention. It is.

  DESCRIPTION OF SYMBOLS 1 ... Liquid spraying apparatus, 2 ... Spraying unit, 3 ... Liquid supply pipe, 4 ... Liquid supply unit, 5 ... Air supply pipe, 6 ... Blower unit, 10 ... Housing, 11 ... Inlet port, 12 ... Discharge port, 20 ... Nozzle unit, 30 ... collision target, 30a ... rough surface, 21 ... nozzle case, 22 ... liquid injection nozzle, 23 ... filter, 24 ... elastic seal member, 221 ... nozzle body, 221b ... liquid inlet, 221c ... tip hole 221d: liquid passage, 222: tubular member, 223: adhesive

Claims (8)

A nozzle body having a liquid passage extending from a liquid inlet opening to the rear end to a front end hole;
A tubular member attached to the tip hole of the nozzle body;
With
A liquid ejecting nozzle that ejects liquid that has flowed into the nozzle body from the liquid inlet through the tubular member.   The liquid ejecting nozzle according to claim 1, wherein a part of the tubular member protrudes from the nozzle body.   The liquid jet nozzle according to claim 1, wherein an inner peripheral surface of the tip hole and an outer peripheral surface of the tubular member are bonded.   The liquid injection nozzle according to claim 1, wherein an inner diameter of the tubular member is 0.08 to 0.3 mm. A nozzle body having a liquid passage extending from a liquid inlet opening at a rear end to a tip hole, and a tubular member attached to the tip hole of the nozzle body, and flowing into the nozzle body from the liquid inlet A liquid injection nozzle for injecting the liquid through the tubular member;
At least a part is formed as a rough surface, and a collision target with which the liquid ejected from the liquid jet nozzle collides with the rough surface,
Including
A liquid spraying apparatus that sprays the liquid sprayed from the liquid spray nozzle by making it finer by colliding with the rough surface of the collision target. A housing formed with an inlet for accommodating the liquid jet nozzle and the collision target and introducing air and an outlet for discharging air introduced from the inlet;
The liquid ejected from the liquid ejecting nozzle is made fine by colliding with the rough surface of the collision target, and the refined liquid is discharged from the discharge port together with the air introduced from the introduction port. A liquid spraying device according to 1.   The liquid spraying device according to claim 6, wherein a liquid ejecting direction from the liquid ejecting nozzle is opposite to a flow direction of air from the introduction port toward the discharge port.   The liquid spraying device according to any one of claims 5 to 7, wherein an interval between the liquid jet nozzle and the collision target is configured to be changeable.