JPS596257Y2 - liquid dispersion element - Google Patents

Description

[Detailed description of the invention] This invention is applicable to the front of automobiles, railways, ships, aircraft, etc.
The present invention relates to an improvement in a liquid dispersion element capable of spraying a cleaning liquid in a fan shape onto a glass surface to be cleaned in order to clean the side or rear glass surface or other glass surfaces.

Conventionally used window washer devices, for example, spray cleaning liquid in a linear form from simple small holes, which results in extremely poor cleaning efficiency as the cleaning liquid is applied only to a portion of the surface to be cleaned. Ta.

Therefore, the present inventor developed a liquid dispersion element as shown in Fig. 1A and 1, and has already filed an application for it. .

That is, this liquid dispersion element includes a liquid supply port a, a main nozzle b located downstream thereof, and a control nozzle C intersecting the main nozzle b.
1, C2, side walls d, d2 forming a flow path downstream from the main nozzle b, control ports e1, e2 that take in a part of the flow from the middle of the side walls d1, d2, and control nozzles C1, C2.
Positive pressure control flow paths f1 and f2 that send this control flow to the side wall d
1, d2 is a throat g located on the center line of the main nozzle b, an outlet area h and an outlet wall i, 12 defining the outlet area h.

These patterns are formed by grooves of a certain depth in a flat plate.

The main jet ejected from the main nozzle b becomes an attached jet along the side wall d1, passes through the throat g, and reaches the outlet area h and the outlet wall 1.
2 and ejects to the outside.

At this time, a part of the adhering jet flows through the control port on the side wall d1
t and is sent to the control nozzle C1 through the positive pressure control flow path f0.

Due to this controlled flow, the main jet leaves the side wall d1 and attaches to the opposite side wall d2, and this attached jet passes through the throat g,
It is directed toward the outlet wall 11 and spouted to the outside.

Also at this time, a part of the adhering jet enters the control port e2 and is sent to the control nozzle C2 through the positive pressure control flow path f2, thereby switching the main jet to the side wall d1.

The jet is thus deflected towards the outlet wall 12.

In this way, the main jet flow is switched only by the control flow within itself without any moving parts, and self-excited oscillation of the fluid is performed.

This periodic deflection of the jet results in a periodic reciprocating sweep of the jet across the exit area h.

The oscillation frequency varies depending on the shape and dimensions of the fluidic element, the pressure of the supplied fluid, etc., but since it is a relatively high frequency,
The fluid is atomized and spread out at the throat g, and a jet of drops is emitted in a sweeping manner within the exit area, resulting in a fan-like distribution of uniform droplet distribution.

Incidentally, the conventional example shown at the beginning of FIG. 1 performs self-excited oscillation by a negative pressure control flow, and can obtain the same fan-shaped dispersion as described above.

The liquid dispersion element that has already been developed in this way can spray liquid in a fan shape, but since the liquid dispersion element is required to be ultra-small, it is natural that the fluid passage, especially the control flow path f1, f2 had to fit into an extremely narrow passage of about 0.3 mm.

Therefore, since the width of the control channels f1 and f2 is narrow, there is a possibility that the channels will be clogged with impurities contained in the cleaning liquid. For example, one of the control channels f1 and f2 may become clogged with impurities contained in the cleaning liquid. When impurities adhere to the control flow path and the flow rate decreases, self-oscillation on the side where the decrease occurs becomes impossible, resulting in one-sided oscillation.In other words, the spray width, which is half the fan width during normal operation, is reduced. There were drawbacks.

This invention was made to eliminate such drawbacks,
To provide a fluid dispersion element capable of fan-shaped spraying in a desired range without reducing the fan-shaped width even if impurities adhere to a control flow path and the flow rate in the flow path decreases.

The present invention will be explained in detail below based on the embodiment shown in FIG.

1 is an element body, and this element body 1 is provided with a liquid supply port 2.

The liquid supply port 2 is provided with a main nozzle 3 and a pair of control ports 4 and 4' that intersect with and face the main nozzle 3, and both control ports 4 and 4' have the same diameter as the control port. They are connected by a connecting path 5.

Reference numeral 6 denotes a substantially egg-shaped central chamber formed ahead of the main nozzle 3, and curved side walls 7 and 7' are provided on both sides of the central chamber.
is formed.

At the tips of these side walls 7 and 7', the passage width of the central chamber 60 is shaped like a throat 8 which is narrowed, and further ahead of this throat 8 there are outlet walls 9 and 9' that widen in a trumpet shape. A spout 10 is provided.

The structure of this embodiment has been described above. Next, to describe its function, first, a pressure liquid of 0.5 to 1 kg is supplied to the supply port 2.
When pressure water of /cIII2 is supplied, the pressure liquid is jetted from the main nozzle 3 toward the central chamber 6, and the jet is attached to either side wall 7 or 7' due to the Coanda effect.

Now if the liquid from the main nozzle 3 is attached to the side wall 7,
The jet will flow along the side wall 7, then pass through the throat 8 and exit along the outlet wall 9'.

The liquid flow at this time will block the throat 8, ? At control port 4, an entrainment phenomenon occurs due to the jet flow, so
Port 4' has a higher pressure than port 4.

Therefore, the high pressure wave at port 4' passes through communication path 5 to port 4'.
Since the pressure in the port 4 is increased, the flow that has been biased toward the side wall 7 is now biased toward the side wall 7'.

The jet whose direction has been changed in this way flows along the side wall 7',
It ejects through the throat 8 and along the outlet wall 9.

In this case, the pressure in port 4 becomes higher than that in port 4', as described above, and the pressure wave reaches port 4' through communication path 5, deflects the flow biased toward side wall 7' toward side wall 7', and flows toward outlet wall 9'. Squirt along.

In this way, the mutually generated pressure waves cause the jet to flow into the central chamber 6.
inside the outlet wall 9.
, 9', the liquid is sprayed out in a fan-like manner.

Note that the frequency of this fluid vibration varies depending on the pressure of the supplied liquid, the area ratio of the main nozzle 3 and the throat 8, the capacity of the communication path 5, etc.

The above is the operation of this embodiment. Since the fluid vibration in the present invention is generated by the pressure difference between the ports 4 and 4' provided on both sides of the main nozzle 3, the ports 4 and 4' are Even if dirt, impurities, etc. adhere to the communicating path 5 and the pores of the connecting path 5 become narrow, if the connecting path 5 is not completely blocked, fan-shaped dispersion will be performed. It is something that

Therefore, the disadvantage that the sector width is reduced as in the conventional one-sided oscillation can be eliminated.

In addition, in the present invention, both ports 4 and 4' are connected by one communication passage 5 having the same diameter as the port, and the structure is different from the conventional one with two passages f and f2. are different,
The present invention has a simple structure and has the advantage of being able to perform stable and uniform fan-shaped dispersion.

[Brief explanation of the drawing]

1A and 1B are plan sectional views showing a conventional liquid dispersing element, and FIG. 2 is a plan sectional view showing an embodiment of the liquid dispersing element according to the present invention. DESCRIPTION OF SYMBOLS 1...Element body, 2...Liquid supply port, 3...Main nozzle, 4, 4'...Control port, 5...Communication path, 6
... Central chamber, 7, 7'... Side wall, 8... Throat, 9, 9'... Outlet wall, 10... Spout port.

Claims (1)

[Scope of utility model registration request] Continuing from the liquid supply port 2, a main nozzle 3 formed to be smaller than the inner diameter of this supply port, a central chamber 6 formed following the main nozzle, and a throat 8 continuing to this central chamber are formed. In a liquid dispersion element provided with a trumpet-shaped spout 10 and respective control ports 4 and 4' provided on the opposite side wall of the central chamber near the main nozzle, both control ports 4 and 4' are provided.
A liquid dispersion element characterized in that the control port and the control port are connected to each other by a communication path 5 having the same diameter.