JP2000246152A - Coating nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the back flow of compressed air to a coating liquid passage even if a nozzle is closed and to unnecessitate to pay attenuation to the moving manner of a coating nozzle in gap between fins by jetting the compressed air from an air duster from the periphery of a discharge pipe, sucking the coating liquid from the discharge pipe and atomizing the liquid. SOLUTION: A flexible pipe 2 is attached to the air duster and the coating nozzle 3 is arranged at the tip part thereof. The coating liquid is sucked from a separately provided vessel through a tube 4, atomized and applied from a nozzle part 7. The compressed air from the air source is supplied to the air duster through a joint 1b by an air hose, and when a trigger is pulled, the compressed air is passed through a pipe 2 and jetted as a high speed jetted stream 14 from an air discharge port 11 to concentrically envelope the discharge pipe 12. As a result, negative pressure is generated at the outlet part of the liquid discharge pipe 12, and the coating liquid is sucked from a vessel through a tube 4 by the negative pressure, drawn from the liquid discharge port 12 through an opening 10 for liquid and a liquid introducing passage 13 by high speed jetted stream 14 and atomized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an application nozzle for inserting an antibacterial agent or a deodorant into the gap between fins by inserting the fin into the outer periphery of a fin of an air conditioner heat exchanger of an automobile or the like.

[0002]

2. Description of the Related Art The fins of heat exchangers for air conditioners such as automobiles are cooled to cool the air in the atmosphere and condense moisture. However, since the surface of the fins adheres to humidity and dust from the atmosphere, Propagation of various bacteria and generation of off-flavors become problems. As a countermeasure, an antibacterial agent or a deodorant is applied to the surface of the fin, and an application nozzle that can be inserted into the narrow space formed on the outer periphery of the fin is attached to the tip of the pipe of the air duster, and compressed air is removed. The application liquid is sucked up from a separate container by an air stream and atomized, and an antibacterial agent and a deodorant are applied to the surface of the fin portion.

FIG. 1 is a view showing the construction of an air duster having a coating nozzle according to the present invention. The configuration is the same as that of the conventional example. A flexible pipe 2 is attached to an air duster 1 and a coating nozzle 3 is provided at the tip thereof. Are arranged. The coating liquid 5 is sucked up from a separate container 6 by a tube 4 and is atomized and applied from a nozzle hole 7. FIG. 4 is a diagram showing the structure of a coating nozzle 50 conventionally used. 4A is a front view of the application nozzle 50, and FIG.
FIG. 4C is a sectional view of the application nozzle 50 taken along the line Y-Y. A pipe 2a is connected to the nozzle body 51, and an air hole 52 for introducing compressed air from the pipe 2a is formed in a non-penetrating manner. A tube 4a is connected to the nozzle body 51 substantially in parallel with the pipe 2a, and a liquid hole 53 for introducing a coating liquid from the tube 4a is formed in a non-penetrating manner.

Referring to FIG. 4C, when the trigger of the air duster is triggered, compressed air is introduced into the air hole 52 from the pipe 2a, and is jetted from the jet hole 54 at a high speed. When the high-speed jet 55 flows through the center of the concentric nozzle hole 56 having a diameter larger than that of the jet hole 54, a negative pressure is generated around the nozzle hole 56, and the negative pressure causes a liquid hole connected to the nozzle hole 56. 53
The coating liquid is drawn in from and is atomized by the high-speed jet flow 55.

However, as shown in FIG. 5 in which the fin portion is coated, the coating nozzle 50 is inserted into the gap 103 between the heat medium pipe 101 of the heat exchanger 100 and the fin 102, and the gap is about 1.0 mm. The coating liquid is applied to the gaps between the fins 102 lined up with. The fins 102 are inserted into the gaps 103 in a narrow space of the automobile and are attached to the tip of the pipe 2a.
The nozzle hole 56 may be in close contact with or close to the end 103 of the fin 102 because the nozzle hole 56 moves up and down and up and down aiming at the gap. At the end portions 104 of the fins 102, the gap between the fins 102 and the thickness of the fins 102 are alternately arranged, and the porosity is about 50%. If it becomes close, the compressed air from the ejection hole 54 cannot be discharged smoothly and the outlet is lost,
Conversely, the compressed air flows back through the tube 4a from the liquid hole 53 as shown by the arrow 105, and blows out from the tip of the tube 4a into the container for the coating solution.

As a result, in the coating operation, attention must be paid to how to move the coating nozzle in the gap between the fins, the operation of the air duster is stopped every time the compressed air flows backward, and the operation is interrupted. Care must also be taken with the coating solution blown out of the apparatus, which significantly reduces workability. Similarly, when dust or the like stuck to the heat exchanger blocks the nozzle hole 56, the compressed air is similarly discharged by the arrow 105.
As described above, the tube 4a flows backward from the liquid hole 53.

[Problems to be solved by the invention]

[0007] Even if the nozzle hole is closed, there is no need to worry about the compressed air flowing back into the passage of the coating solution, and it is possible to provide a coating nozzle which does not require attention to how to move the coating nozzle in the fin gap. It is to be.

[Means for Solving the Problems]

The present invention relates to a two-fluid coating nozzle disposed at the tip of a pipe attached to an air outlet of an air duster, wherein a first non-penetrating nozzle for introducing an air flow from the pipe to the coating nozzle. A second non-through hole connected to a suction tube for introducing a coating liquid is formed substantially in parallel with the first non-through hole, and an intersection of the non-through hole of the application nozzle is formed. Forming a coating liquid hole connected to the second non-through hole at a position deeper than the first non-through hole in the direction, and attaching a discharge pipe to the coating liquid hole; An air hole is drilled so as to be larger in diameter and concentric than the first non-through hole so as to be connected to the first non-through hole, and compressed air from an air duster blows out from around the discharge pipe to discharge the coating liquid from the discharge pipe. Aspirate and atomize. Further, an application nozzle is provided in which the discharge pipe protrudes from the surface of the application nozzle.

[0009]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram of an air duster having a coating nozzle according to the present invention, FIG. 2 is a diagram illustrating a configuration of a coating nozzle 3, FIG. 2 (a) is a front view, FIG. 2 (b) is a side view, and FIG. 2 (c) is a sectional view taken along the line XX. It should be noted that the figure is an example of the embodiment, and has a design change element such as a mechanism and an arrangement without departing from the scope of the claims.

In FIG. 1, a flexible pipe 2 is attached to an air duster 1, and a coating nozzle 3 is disposed at the tip thereof. The coating liquid 5 is sucked up from a separate container 6 by a tube 4 and is atomized and applied from a nozzle unit 7. In FIG. 2, the pipe 2 is connected to the nozzle body 8, and an air hole 9 for introducing compressed air sent from the air duster 1 through the pipe 2 is formed in a non-penetrating manner. It is arranged so that compressed air is discharged from the outlet hole 11 to the outside of the nozzle body 8.

A tube 4 is connected to the nozzle body 8 almost in parallel with the pipe 2, and a liquid hole 10 for introducing a coating liquid sucked from the container 6 through the tube 4 is formed in a non-penetrating manner. The liquid discharge pipe 12 is connected to the liquid discharge pipe 12 from the liquid introduction path 13, and the liquid discharge pipe 12 is connected to the liquid introduction path 1 so that the coating liquid is discharged from the liquid discharge pipe 12 to the outside of the nozzle body 8.
3 at the exit. The liquid discharge pipe 12 is disposed substantially concentrically with the air outlet hole 11,
2 is 0.5 to 1.0 mm more than the surface 8a of the nozzle body 8
It is arranged to protrude to the extent. In the present embodiment, the number of the air outlet holes 11 and the number of the liquid discharge tubes 12,
Is set to two, but can be increased or decreased as necessary.

The air duster 1 is supplied with compressed air from an air source (not shown) to a joint 1b by an air hose (not shown). The air is ejected from the air outlet hole 11 as a high-speed jet 14 so as to concentrically surround the discharge pipe 12. As a result, a negative pressure is generated at the outlet of the liquid discharge pipe 12, and the negative pressure causes the coating liquid 5 to be sucked from the container 6 by the tube 4, and the liquid discharge pipe 12 to pass through the liquid hole 10 and the liquid introduction path 13. The coating liquid is drawn out from the nozzle 12 by the high-speed jet stream 14 and atomized. FIG. 3 is a diagram showing a state in which the application liquid is applied from the application nozzle 3 to the gap between the fins of the air conditioner heat exchanger.

In this case, the nozzle body 8 is connected to the heat exchanger 1
The gap 10 between the heat medium pipe 101 and the fin 102
Even when the liquid discharge pipe 12 is in close contact or close contact with the end portion 104 of the fin 102 when the liquid discharge pipe 12 is inserted into the fin 102, the liquid discharge pipe 12 protrudes from the surface 8 a of the nozzle body 8. Since the air outlet hole 11 is not closed, the compressed air does not flow into the liquid discharge pipe 12, and in the coating operation, pay attention to the movement of the coating nozzle in the gap between the fins, and every time the compressed air flows backward. In addition, there is no need to stop the operation of the air duster to stop the operation, thereby improving the workability.

[0014]

Since the present invention is configured as described above, it has the following effects. Even if the nozzle part of the coating nozzle is in close contact with or close to the end of the fin, the outlet of compressed air is blocked and the compressed air flows into the liquid flow path and flows backward as in the case of the conventional structure. Therefore, it is not necessary to pay attention to how to move the application nozzle or to stop the air duster every time the compressed air flows backward, so that the work is not interrupted, thereby improving workability.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an air duster having a coating nozzle according to the present invention.

FIGS. 2A and 2B are diagrams illustrating the configuration of a coating nozzle according to the present invention. FIG. 2A is a front view, FIG. 2B is a side view, and FIG.
(C) is an XX sectional arrow view.

FIG. 3 is a view showing a state in which a coating nozzle according to the present invention is inserted into a gap between a fin and a pipe for a heat medium of a heat exchanger to perform coating.

4 (a) is a front view, FIG. 4 (b) is a side view, and FIG. 4 (c) is a sectional view taken along a line YY in FIG. .

FIG. 5 is a diagram in which a coating nozzle of a conventional example is inserted into a gap between a fin and a pipe for a heat medium of a heat exchanger to perform coating.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air duster 2 Pipe 3 Application nozzle 4 Tube 11 Air discharge hole 12 Discharge pipe

Claims (2)

[Claims] 1. A two-fluid application nozzle disposed at a tip of a pipe attached to an air outlet of an air duster,
The coating nozzle is provided with a first non-through hole for introducing an air flow from the pipe and a second non-through hole connected to a suction tube for introducing a coating liquid. A hole for a coating liquid connected to the second non-through hole at a position deeper than the first non-through hole in a direction intersecting the non-through hole of the application nozzle; At the same time, a discharge pipe is attached to the coating liquid hole, and an air outlet hole is formed so as to be larger in diameter and concentric than the discharge pipe so as to be connected to the first non-through hole, and compressed from an air duster. An application nozzle, characterized in that air is ejected from around the discharge pipe, and the application liquid is sucked out from the discharge pipe and atomized. 2. The coating nozzle according to claim 1, wherein said discharge pipe is provided so as to protrude from a surface of said coating nozzle.