JPH0510945Y2 - - Google Patents

Description

[Detailed description of the invention] (Purpose of the invention) This invention is a spray nozzle for aerosol injection devices that use compressed liquefied gas as a propellant, injection devices that use manual pressure such as finger pressure, and other various solution injection devices. To provide a spraying means that can spray a mist of fine particles even under relatively weak injection pressure or under the pressure of liquefied gas or insoluble compressed gas that is poorly compatible with the injection liquid. is its purpose.

For aerosol injection containers that are consumed in large quantities on a daily basis, organic fluorine liquefied gases such as Freon gas are used from the viewpoints of nonflammability, non-toxicity to the human body, and good compatibility with alcohol, which is the main solvent of the injection material. Previously, it had been mainstream to use organic fluorine gases as propellants, but due to demands to preserve the ozone layer in the upper atmosphere, a complete ban on the use of these organic fluorine gases is now on the agenda. There is. In conventional aerosol injection devices, good compatibility between the solvent and propellant of the propellant is an essential condition for obtaining a spray of fine particles. Therefore, if the use of organic fluorine gas is completely prohibited, it will be necessary to discover or develop an alternative gas.
Therefore, various alternative gases such as LP gas and carbon dioxide gas have been proposed, but none with characteristics comparable to organic fluorine gas has yet been obtained.

Therefore, this invention proposes a means for achieving atomization of the spray by improving the structure of the spray nozzle, without depending on the characteristics of the injection gas.

(Structure of the device) This device will be explained below with reference to the illustrated embodiment. Reference numeral 1 denotes a beak tube having an end wall 11 at the front, and the shaft hole of the beak tube 1 is limited at the rear by a wall 2. Therefore, a cylinder chamber 12 is formed between the rear wall surface of the end wall 11 and the front wall surface of the wall body 2. An injection hole 13 is provided through the end wall 11, and an injection passage 21 is opened in the front wall surface of the wall body 2. A cylindrical piece 3 is loosely inserted into the cylinder chamber 12. A concave cavity 32 and a tangential groove 34 are bored in at least the front wall surface 35 of this piece 3. The concave cavity 32 is formed concentrically with the circumferential surface of the piece 3, while the tangential groove 3
4 connects the peripheral surface 31 of the top 3 and the recessed cavity 32 in the tangential direction with respect to the constant rotation direction of the top 3 and in the tangential direction with respect to the peripheral wall 33 of the recessed cavity 32.

Although this invention has been developed as described above, in the embodiment shown in FIGS. 1 and 2, the beak tube 1 is provided in front of the push button 4 of the aerosol injection device, leaving approximately the thickness of the end wall 11. Therefore, the bottom of the cavity forms the front wall surface of the wall 2 that limits the rear end of the cylinder chamber 12 described above. Next, to explain the top 3 in the illustrated embodiment, the top shown in FIGS. 3 to 6 is an example of a modification of the top 3 shown in FIGS. 1 and 2. That is, according to this modification, the concave cavity 32 and tangential groove 34 of the piece are bored on both sides of the front wall surface 35 and the rear wall surface 36. However, since it is necessary to rotate the top in only one direction, the arrangement of the cutting line grooves 34 on the front wall surface 35 and the rear wall surface 36 is reversely symmetrical. In contrast to this modification, in frame 3 shown in FIGS. 1 and 2,
The recess 32 is bored in both the front and rear walls of the piece, but the truncation groove 34 is bored only in the front wall 35 in the same manner as shown in FIG. 3, and the rear wall 36 is As shown in FIG. 7, the cutting groove 34 is missing. In addition, according to the modification of the top shown in FIG.
The point that 4 is drilled is the same as in each of the above examples, but
A notch 37 located corresponding to the cut line groove 34 is bored, and at first glance it looks like a windmill. These notches 37 are for receiving the fluid passing through the cylinder chamber 12 and applying strong torque to the piece.

Further, according to each of the above-mentioned examples of the top, the recess 32 is similarly bored in the rear wall surface 36 of the top.
The concave cavity 32 does not necessarily need to be provided on the rear wall surface 36. However, according to the example shown in FIGS. 1 and 2, a protrusion 22 corresponding to the size of the recess 32 on the rear wall surface of the piece is formed on the front wall surface of the wall 2, and therefore 3 rotates, this protrusion 22 almost acts as an axis and can rotate smoothly.

That is, since this device is constructed as described above, the pressurized liquid introduced from the injection passage 21 into the cylinder chamber 12 passes from the circumferential surface 31 of the top 3 through the tangential groove 34 and is perforated in the front wall surface 35 of the top. Enter the concave cave 32 where you are. As mentioned above, the truncation groove 34 is formed in the truncation direction with respect to the constant rotation direction of the top 3, and
Since the peripheral surface 31 of the top 3 and the recess 32 are connected in the tangential direction to the peripheral wall 33 of the top 3, the pressurized fluid rapidly passing through the tangential groove 34 transfers the torque in the rotational direction of the top 3 to the top 3. Therefore, top 3 rotates at high speed.

As is well known, when the piece is fixed unlike this invention, the above-mentioned tangential groove 34
The pressurized liquid introduced into the concave cavity 32 forms a swirling flow within the concave cavity 32, and when the swirling flow enters the injection hole 13 with pressure, the fluid forming this swirling flow flows into the injection hole 13. Forcibly strikes the edge on the cylinder chamber 12 side to form a turbulent flow. In this turbulent flow process, the liquid is divided, and after passing through the injection hole 13, the liquid droplets are broken due to a sudden pressure drop, thus forming a spray from the pressurized liquid in the container.

By the way, according to this invention, as described above, the top 3 is loosely inserted into the cylinder chamber 12, and the pressurized liquid is passed through the injection passage 21 that opens on the rear wall surface of the cylinder chamber 12.
Since the top 3 is supplied from the cylinder chamber 12, the top 3 is pressed against the end wall 11 forming the front wall surface of the cylinder chamber 12. However, the pressurized liquid supplied to the cylinder chamber 12 in this way is supplied to the concave cavity 32 through the tangential groove 34 from between the circumferential surface of the cylinder chamber 12 and the circumferential surface of the piece 3, and then is supplied to the concave cavity 32. The pressurized liquid supplied to the cavity 32 is discharged from the injection hole 13, but since the cross-sectional area of the injection hole 13 is minute, the liquid inside the concave cavity 32 still has a considerable pressure, Because it applies backward pressure to
A stable liquid film is formed between the piece 3 and the end wall 11, and due to the lubricating action of this liquid film, the piece 3 is attached to the end wall 11.
It rotates without being pressed against 1.

The pressurized liquid that entered the concave cavity 32 from the truncation groove 34 is
After forming a swirling flow along its peripheral wall, it is emitted from the injection hole 13, but since the top 3 rotates, the position of the outlet of the tangential groove 34, which is the base end of the swirling flow, is at the same rotational speed as the swirling flow. direction, constantly and rapidly moving in the forward direction of the swirling flow. therefore,
The flow velocity of the swirling flow with respect to a fixed position on the front wall surface of the cylinder chamber 12 is a large flow velocity obtained by superimposing the rotational speed of the top 3 on the flow velocity when the top is fixed and the position of the outlet of the tangential groove 34 is fixed. becomes. Thus, according to this invention, the swirling flow of the pressurized liquid at such a high flow rate rushes and collides with the inner end of the injection hole 13, so that strong vibrations are generated, although the amplitude is small, and inside the cylinder chamber 12. The motion of the top 3, which rotates while floating, promotes this amplitude. Therefore, due to these collisions and vibrations, the liquid is violently shredded and split, and as a result, it is ejected from the injection hole 13 as fine mist droplets.

(Effect of the invention) Thus, according to this invention, as mentioned above, it is possible to generate extremely high-speed swirling flow and violent vibration of the liquid in the immediate vicinity of the injection hole, and due to this, it is possible to generate liquid from the injection hole. Compressed liquefied gas or other propellants are used because the emitted mist particles can be made extremely fine, and this can be done only by using a pressurized liquid stream that divides and refines the particles. In the case of a spraying device, extremely high spraying effects can be achieved even when using a propellant with poor compatibility with the solvent or when no propellant is used. Therefore, according to this invention, it is possible to completely eliminate the use of organic fluorine gas, which is one of the causes of air pollution, in the production of spray containers for consumer or industrial use, where the consumption amount is enormous. be.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of one embodiment of the spray nozzle according to this invention applied to a push button of an aerosol injection device, Fig. 2 is a cross-sectional view of Fig. 1, and Fig. 3 is a modification of the top. 4 is a cross-sectional view of FIG. 3, FIG. 5 is a rear view of the frame shown in FIGS. 3 and 4, FIG. 6 is a perspective view, and FIG. 7 is a cross-sectional view of the frame shown in FIGS. FIG. 2 is a rear view of the top shown in FIG. 2, and FIG. 8 is a front view of another modification of the top. 1 is a beak tube, 11 is an end wall, 12 is a cylinder chamber, 13 is an injection hole, 2 is a wall body, 21 is an injection passage, 22 is a protrusion,
3 is a top, 31 is a circumferential surface, 32 is a concave cavity, 33 is a circumferential surface, 34 is a cut line groove, 35 is a front wall surface, 36 is a rear wall surface, and 37 is a notch.

Claims (1)

[Scope of utility model registration request] By limiting the rear part of the shaft hole of the beak tube 1 having the end wall 11 at the front with the wall body 2, a cylinder chamber 12 is formed between the rear wall surface of the end wall 11 and the front wall surface of the wall body 2, An injection hole 13 is provided through the end wall 11, and an injection passage 21 is opened on the front wall surface of the wall body 2, and a cylindrical piece 3 is loosely inserted into the cylinder chamber 12. At least the concave groove 32 and the tangential groove 34, which is formed in the tangential direction with respect to the constant rotational direction of the top 3 and connects the peripheral surface 31 of the top 3 and the concave cavity 32 in the tangential direction with respect to the peripheral wall 33 of the concave cavity 32, are formed in the top. A spray nozzle is formed in the front wall surface 35 of No. 3.