JP2004223378A - Liquid drop jet device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new liquid drop jet device capable of forming a necessary amount of liquid drops with a uniform particle size and capable of sufficiently accelerating liquid drops. <P>SOLUTION: A liquid drop feed-out pipe 3, a liquid drop feeding gas supply pipe 5 and a liquid supply pipe are respectively connected to a liquid drop forming chamber 2 to which a vibrator 1 is attached, and a liquid 10 and a liquid drop feeding gas 37 are supplied into the liquid drop forming chamber 2 to produce liquid drops with a uniform particle size in the liquid drop forming chamber 2 or the liquid drop feed-out pipe 3. The liquid drop feed-out pipe 3 and an accelerating gas supply pipe 17 are respectively connected to a mixer 16 comprising a mixing chamber for mixing liquid drops and the gas fluid and a liquid drop jet orifice 18 and the liquid drops with a uniform particle size are ejected in a desired direction or to a region along with an accelerating gas 11 from the liquid drop jet orifice 18 of the mixer 16. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
[Industrial applications]
The present invention relates to a droplet ejecting apparatus, and more particularly, to an apparatus that ejects droplets having a small particle diameter toward an object by using a pressurized gas.
[0002]
[Prior art]
2. Description of the Related Art Droplet ejecting apparatuses are widely used in various industrial fields for spraying and applying a specific substance to a surface of an object, painting or washing, removing foreign matter, and performing other surface processing and surface treatment.
[0003]
FIG. 1 is a conceptual view of an example of a conventional liquid droplet ejecting apparatus. In the figure, reference numeral 31 denotes a closed storage tank. However, the front end opening 8 of the liquid supply pipe 7 is located in the middle, and the rear end opening 15 of the liquid delivery pipe 14 is located near the lower part. A pipe opening / closing valve 9 is attached to each of the liquid supply gas supply pipe 32, the liquid supply pipe 7, and the liquid delivery pipe 14 in the middle of each of the pipes. The pressure can be controlled arbitrarily.
[0004]
In the figure, reference numeral 16 denotes a mixer, which comprises a mixing chamber 27 and a droplet ejection port 18 communicating with the mixing chamber 27, as shown in FIG. Are connected to each other, the liquid 10 sent from the liquid delivery pipe 14 and the accelerating gas 35 are mixed, and the droplet 24 is generated by the pressure of the accelerating gas 35, and provided at the end of the mixer 16. The droplet is ejected from the droplet ejection port 18 toward the object 19. The accelerating gas supply pipe 34 is a separate system from the liquid transport gas supply pipe 32, and a conduit opening / closing valve 9 is provided in the middle thereof, whereby the flow rate and pressure of the accelerating gas 35 are arbitrarily adjusted. I can do it.
[0005]
In this conventional example, when the liquid 10 is supplied into the closed storage tank 31 by the liquid supply pipe 7 and the liquid transfer gas 36 is supplied into the closed storage tank 31 by the liquid transfer gas supply pipe 32, The internal pressure changes, and the liquid 10 in the closed storage tank 31 flows through the liquid delivery pipe 14 and is sent to the mixer 16 due to the pressure difference caused by the change. On the other hand, an accelerating gas 35 is supplied to the mixer 16 via an accelerating gas supply pipe 34. In the mixer 16, a liquid 10 having a small particle diameter is formed by the pressure of the accelerating gas 35. As a result, the droplet is jetted from the droplet jetting port 18 together with the accelerating gas 35 toward the object 19 to be used for various processing operations.
[0006]
On the other hand, FIG. 2 shows another example of a conventional liquid droplet ejecting apparatus. In this liquid droplet ejecting apparatus, a liquid transport gas 36 is introduced into a storage tank 31 as in the conventional example shown in FIG. The transfer gas supply pipe 32 is not provided, and the pump 20 is interposed in the middle of the liquid delivery pipe 14, and the liquid 20 is transferred to the mixer 16 by driving the pump 20. In the conventional example shown in FIG. 2, the storage tank 33 does not need to be in a closed state. The other parts are exactly the same as those in the conventional example shown in FIG.
[0007]
In the droplet ejecting apparatus shown in FIG. 2, the liquid 10 in the storage tank 33 is pumped up by the pump 20, sent to the mixer 16, and supplied to the mixer 16 via the accelerating gas supply pipe 34. The droplets 24 have a small particle diameter due to the pressure, and are jetted toward the object 19 together with the accelerating gas 35.
[0008]
[Problems to be solved by the invention]
In all of these conventional droplet ejecting apparatuses, droplets 24 are generated from the liquid 10 in the mixing chamber 27 in the mixer 16. However, as shown in FIG. 3, the particle diameters become irregular, which is one of the causes of lowering the quality and accuracy of the surface treatment and processing work. Furthermore, it has never been possible to control the particle size of the droplets 24 to produce droplets 24 having a desired particle size. Further, a part of the energy of the acceleration gas 35 supplied from the acceleration gas supply pipe 34 is consumed for the generation of the droplets 24 in the mixing chamber 27, and a pressure loss occurs correspondingly. In order to sufficiently accelerate the droplets 24 ejected from the droplet ejection ports 18, it is necessary to use a higher-pressure gas in anticipation of the pressure loss. Along with this, pipes and the like must be made robust so as to withstand this high-pressure gas, and the manufacturing cost of each member must be high.
[0009]
As described above, the conventional droplet ejecting apparatus has the drawbacks that the generation of the droplets 24 cannot be sufficiently controlled, and that a high-pressure gas is required and a robust configuration corresponding to the gas is required. It wasn't going to go.
[0010]
The present inventor has conducted research to solve the above-mentioned disadvantages of the conventional droplet ejecting apparatus, and as a result, has been able to generate a required amount of droplets having a uniform particle diameter, and to obtain a new droplet which can sufficiently accelerate the droplets. The development of the injection device has been proposed here as the present invention.
[0011]
[Means for Solving the Problems]
A droplet delivery pipe 3, a droplet supply gas supply pipe 5, and a liquid supply pipe 7 are connected to a droplet generation chamber 2 to which a vibrator 1 is attached, respectively. A supply gas 37 is supplied so that the droplets 30 having a uniform particle size can be generated in the droplet generation chamber 2 or the droplet delivery pipe 3, and the droplets 30 and the droplet accelerating gas 11 are combined. The droplet delivery pipe 3 and the droplet supply gas supply pipe 17 are connected to the mixer 16 including the mixing chamber 27 and the droplet ejection port 18 for mixing, respectively. The above problem has been solved by enabling the droplet 30 having the particle diameter to be jetted together with the droplet accelerating gas 11 toward a desired direction or site.
Further, the liquid drop sending chamber 3 and the liquid supply pipe 7 are connected to the liquid drop generating chamber 2 having the vibrator 1 and the internal space 23 communicating with the outside. The droplet delivery pipe 3 and the liquid are supplied to an aspirator-type mixer 26 that allows the generation of droplets 30 having a uniform particle size in the droplet delivery pipe 3 and suctions one of the fluids by a pressure difference between the two fluids. The droplet accelerating gas supply pipes 17 are connected to each other, and droplets 30 having a uniform particle size are discharged together with the droplet accelerating gas 11 in a desired direction or region from a droplet jetting port 18 attached to the aspirator type mixer 26. The above-mentioned problem was solved by making it possible to inject the fuel toward the nozzle.
[0012]
Embodiment
FIG. 4 is a conceptual diagram of one embodiment of the invention according to claim 1.
[0013]
In the figure, reference numeral 2 denotes a droplet generation chamber having an internal space 23, and a vibrator 1 is attached to a lower portion of the droplet generation chamber 2, and the vibrator 1 is controlled by an oscillator 22. I have. A rear end opening 4 of the liquid drop delivery pipe 3 and a front end opening 6 of the liquid supply gas supply pipe 5 are located closer to an upper portion of the internal space 23 of the droplet generation chamber 2, and closer to a lower portion thereof. The front end openings 8 of the liquid supply pipes 7 are located respectively, and pipe opening / closing valves 9 are respectively attached to the liquid supply pipes 7 and the gas supply pipes 5 for transporting the liquid drops in the middle of the pipes, thereby forming the liquid drops. The liquid 10 and the droplet transport gas 37 can be supplied into the chamber 2 while adjusting the flow rate and the pressure, respectively.
[0014]
Further, in the drawing, reference numeral 16 denotes a mixer, which has basically the same structure as that of the conventional mixer, and has a mixing chamber 27 and a droplet ejection port 18 as shown in FIG. 3 and the tip of the droplet acceleration gas supply pipe 17 are connected to each other, and the droplet 30 sent from the droplet delivery pipe 3 is accelerated by the droplet acceleration gas 11 in the mixing chamber 27, The liquid is ejected from a droplet ejection port 18 provided at the tip of the object 16 toward the object 19. A conduit opening / closing valve 9 is also provided in the middle of the conduit of the droplet accelerating gas supply pipe 17 so that the flow rate and pressure of the droplet accelerating gas 11 sent to the mixer 16 can be arbitrarily adjusted. ing.
[0015]
In this embodiment, the liquid 10 is supplied from the liquid supply pipe 7 into the droplet generation chamber 2 and stored therein. When the vibrator 1 is driven in this state to vibrate the liquid 10, droplets 30 having a uniform particle size are continuously generated from the liquid 10, and the liquid 30 fills the internal space 23 of the droplet generation chamber 2. On the other hand, when the droplet transport gas 37 is supplied to the internal space 23 of the droplet generation chamber 2 by the droplet transport gas supply pipe 5, the generated droplets 30 are transferred together with the droplet transport gas 37 to the droplet delivery pipe 3. And flows into the mixer 16.
[0016]
On the other hand, the gas 16 for droplet acceleration is supplied to the mixer 16 via the gas supply pipe 17 for droplet acceleration, and the droplet 30 is accelerated in the mixing chamber 27 by the gas 11 for droplet acceleration. The droplets 30 having a uniform particle diameter are urged toward the object 19 from the droplet ejection port 18 together with the droplet acceleration gas 11.
At this time, by controlling the oscillation frequency and the output by the oscillator 1 and the oscillator 22, a desired droplet diameter and droplet amount can be produced. Further, by operating the conduit opening / closing valve 9 of the liquid supply pipe 7, the flow amount of the liquid 10 into the droplet generation chamber 2 is adjusted to change the height of the liquid level. And the amount of droplets 30 generated can be controlled. In the above-described embodiment, the droplet 30 is generated in the droplet generation chamber 2. However, as in the embodiment shown in FIG. The pipe 3 and the pipe 3 may be connected in an in-line manner, and the droplet 30 may be generated in the droplet delivery pipe 3.
[0017]
As described above, in this embodiment, since the droplet 30 is generated by the vibrator 1 and the oscillator 22, not only the droplet 30 having a uniform particle size can be generated, but also the conventional method has been difficult. The control of the particle size and the amount of generation of the droplet 30 was free, and the pressure loss of the droplet accelerating gas 11 accompanying the generation of the droplet 30 was eliminated. It can be accelerated enough. Further, since a gas having a lower pressure than in the conventional case is sufficient, it is possible to simplify the configuration of the entire apparatus, improve durability, and reduce costs.
[0018]
Next, one embodiment of the invention according to claim 2 shown in FIG. 5 will be described.
[0019]
In the drawing, reference numeral 2 denotes a droplet generation chamber which communicates with the outside, and a vibrator 1 is attached to a lower portion of the droplet generation chamber 2, and the vibrator 1 is controlled by an oscillator 22. ing. In the figure, reference numeral 25 denotes an intake pipe for taking air into the droplet generation chamber 2.
In the internal space 23 of the droplet generation chamber 2, a rear end opening 4 of the droplet delivery pipe 3 and a front end opening 8 of the liquid supply pipe 7 are respectively positioned. A conduit opening / closing valve 9 is attached in the middle of the road so that the liquid 10 can be supplied into the droplet generation chamber 2 while adjusting the flow rate.
[0020]
Reference numeral 26 denotes an aspirator-type mixer for sucking one of the fluids by utilizing the pressure difference between the two fluids. The tip of the droplet delivery pipe 3 and the tip of the droplet acceleration gas supply pipe 17 are respectively provided. The droplet 30 is suctioned from the droplet generation chamber 2 by a pressure difference between the droplet acceleration gas 11, which is a gaseous fluid, and the gas containing the droplet 30. The liquid is accelerated, and is ejected toward the object 19 from a droplet ejection port 18 provided at the tip.
[0021]
In this embodiment, the liquid 10 is supplied from the liquid supply pipe 7 into the droplet generation chamber 2 and stored therein. When the vibrator 1 is driven in this state to vibrate the liquid 10, droplets 30 having a uniform particle size are continuously generated from the liquid 10, and the liquid 30 fills the internal space 23 of the droplet generation chamber 2. The droplet 30 may be generated not only in the droplet generation chamber 2 but also in the droplet delivery pipe 3.
[0022]
On the other hand, when the droplet accelerating gas 11 is supplied to the aspirator type mixer 26 via the droplet accelerating gas supply tube 17, the internal pressure of the droplet sending tube 3 connected to the mixer 26 changes, Due to the resulting pressure difference, the liquid droplets 30 filling the internal space 23 of the liquid droplet generation chamber 2 are sucked toward the mixer 26, and the liquid droplets 30 having a uniform particle diameter are converted into a liquid droplet accelerating gas. The droplet 11 is ejected from the droplet ejection port 18 toward the object 19.
[0023]
At this time, by controlling the vibration frequency and the output by the vibrator 1 and the oscillator 22, it is possible to produce a desired particle diameter and a droplet amount of the droplet 30. Further, by operating the conduit opening / closing valve 9 of the liquid supply pipe 7, the flow amount of the liquid 10 into the droplet generation chamber 2 is adjusted to change the height of the liquid level. And the amount of droplets 30 generated can be controlled.
In this embodiment, similarly to the embodiment shown in FIG. 4 described above, generation of droplets 30 having a uniform particle diameter, control of the particle diameter of droplets 30 and generation amount thereof, Not only can pressure loss be prevented, but also there is no need for a supply pipe for the droplet transport gas 37 to the droplet generation chamber 2, so that there is an advantage that piping equipment can be further simplified.
[0024]
【effect】
As described above, in the droplet ejecting apparatus according to the present invention, since the droplet 30 is generated by the vibrator 1 and the oscillator 22, not only the droplet 30 having a uniform particle diameter can be generated, but also It is possible to freely control the particle size and the amount of the droplets 30 which have been difficult in the past, and there is no pressure loss of the droplet accelerating gas 11 accompanying the generation of the droplets 30. However, the droplet 30 can be sufficiently accelerated, and has an effect that a higher quality processing operation can be performed while simplifying the configuration of the entire apparatus, improving durability and reducing costs, and has an extremely high practicality. It has value.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of an example of a conventional droplet ejecting apparatus.
FIG. 2 is a conceptual diagram of another example of the conventional droplet ejecting apparatus.
FIG. 3 is a droplet behavior diagram of an example of a mixer in the droplet ejecting apparatus.
FIG. 4 is a conceptual diagram of one embodiment of a droplet ejecting apparatus according to claim 1.
FIG. 5 is a conceptual diagram of one embodiment of a droplet ejecting apparatus according to claim 2.
FIG. 6 is a droplet behavior diagram of an embodiment of a mixer used in the droplet ejecting apparatus according to claim 1 and claim 2.
FIG. 7
The conceptual diagram of other embodiments.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Oscillator 2 Droplet generation chamber 3 Droplet sending pipe 4 Rear end opening 5 Droplet transport gas supply pipe 6 Tip opening 7 Liquid supply pipe 8 Tip opening 9 Pipe opening / closing valve 10 Liquid 11 Droplet acceleration Gas 14 Liquid delivery pipe 15 Rear end opening 16 Mixer 17 Droplet accelerating gas supply pipe 18 Droplet injection port 19 Object 20 Pump 22 Oscillator 23 Internal space 24 Droplet 25 Intake pipe 26 Aspirator type mixer 27 Mixing chamber 30 Droplet 31 Closed storage tank 32 Liquid transfer gas supply pipe 33 Storage tank 34 Acceleration gas supply pipe 35 Acceleration gas 36 Liquid transfer gas 37 Droplet transfer gas

Claims (8)

A droplet delivery pipe 3, a droplet supply gas supply pipe 5, and a liquid supply pipe 7 are connected to a droplet generation chamber 2 to which a vibrator 1 is attached, respectively. And a mixing chamber 27 for mixing droplets and a gaseous fluid, while supplying droplets 30 for supplying droplets 30 having a uniform particle size in the droplet generation chamber 2 or the droplet delivery pipe 3. The droplet delivery pipe 3 and the droplet acceleration gas supply pipe 17 are connected to a mixer 16 having a droplet ejection port 18, respectively. A liquid droplet ejecting apparatus which is capable of injecting the liquid droplets together with the liquid droplet accelerating gas 11 in a desired direction or position. The droplet delivery pipe 3 and the liquid supply pipe 7 are connected to the droplet generation chamber 2 having the vibrator 1 and the internal space 23 of which is in communication with the outside. A drop delivery pipe 3 and a droplet acceleration are provided to an aspirator-type mixer 26 which can generate droplets 30 having a uniform particle diameter in the tube 3 and suction one of the fluids by a pressure difference between the two fluids. And a droplet 30 having a uniform particle size is directed together with the droplet accelerating gas 11 in a desired direction or position from a droplet jetting port 18 attached to the aspirator type mixer 26. A liquid droplet ejecting apparatus characterized in that the liquid can be ejected. 3. The droplet ejecting apparatus according to claim 1, wherein the particle size of the droplet generated from the liquid in the droplet generating chamber is controlled by changing the frequency of the vibrator. 3. The droplet ejecting apparatus according to claim 1, wherein the amount of droplets generated from the liquid in the droplet generation chamber is controlled by changing the frequency of the vibrator. The droplet ejecting apparatus according to claim 1, wherein the output of the vibrator 1 is changed to control the particle diameter of the droplet 30 generated from the liquid 10 in the droplet generation chamber 2. 3. The droplet ejecting apparatus according to claim 1, wherein an amount of the droplet generated from the liquid in the droplet generating chamber is controlled by changing an output of the vibrator. The particle size of a droplet (30) generated from the liquid (10) is controlled by varying the liquid level of the liquid (10) stored in the droplet generation chamber (2). Droplet ejector. The amount of the droplets (30) generated from the liquid (10) is controlled by varying the liquid level of the liquid (10) stored in the droplet generation chamber (2). Droplet ejector.

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