JPH0737802B2 - Fluid oscillation element - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid oscillating element used for a jetting nozzle of a washing device or a sprinkler for washing dishes and a human body by jetting washing water.

2. Related Art A conventional oscillator is shown in FIG. This element is the supply channel 1
7, supply nozzle 18, side wall 1 on both sides of the supply nozzle 18 downstream
9 and 20, claws 21 and 22 provided at the end portions of the side walls, upper and lower output paths 23 and 24, and atmosphere communication ports 25 and 26.

In the above structure, the fluid flowing from the supply passage 17 is ejected from the supply nozzle 18. This jet is split by the pawls 21 and 22. If the jet flow is bent downward, part of the jet flow is split by the lower pawl 21 and flows into the lower vortex chamber, so that the rotational energy and internal pressure of the lower vortex increase. On the other hand, the fluid in the upper vortex chamber flows out from the gap between the claw 22 and the jet flow and is guided to the output path 23 together with the jet flow. Therefore, the rotational energy of the upper vortex, the internal pressure, etc. are reduced, and the jet flow is coupled with the rotational energy of the lower vortex, the internal pressure, etc.
It is bent upward on the opposite side and flows out from the output path 24. The above states are repeated alternately, and oscillation is caused. The atmosphere communication port functions to make the vortex chamber pressure almost equal to atmospheric pressure.

In the above conventional oscillator, the oscillation frequency is basically determined by the volume of the vortex chamber. In the case of incompressible fluid such as liquid, low frequency oscillation is performed. In particular, it is very difficult to oscillate a low frequency of a small oscillating element used for a nozzle of a cleaning device. Further, since the injection is performed from the two output paths, it is not suitable as a nozzle element that requires uniform injection for cleaning and water sprinkling.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In order to solve the above-mentioned problems, a fluid oscillation element has a fluid element body having an ejection port formed upward, an output flow path composed of left and right side walls below the ejection port, and air communication. A vortex chamber having a mouth and a supply nozzle are sequentially formed, and the vortex chamber has a length of a component parallel to the flow longer than a length of a component perpendicular to the flow and an atmosphere communication port provided in the vortex chamber. Is located at or below the center of the length of the component parallel to the flow in the vortex chamber.

The jet energy injected from the supply nozzle of the action element is fed back by the rotational energy of the vortices on both sides of the jet generated in the vortex chamber.
Self-oscillation occurs due to the rotational energy of the left and right vortices of the jet flow and the change in vortex chamber pressure due to the difference between the amount of air flowing out of the vortex chamber due to the main jet in the vortex chamber and the amount of air flowing into the vortex chamber from the atmosphere communication port. Of. In this oscillation,
The amount of air contained in the rotating vortex in the vortex chamber is increased, the compressibility effect of air is utilized, the oscillation is stabilized, and the switching time is alternately lengthened to lengthen the self-oscillation cycle.

A long component parallel to the jet of the vortex increases the deflection of the jet due to the compression effect in the vortex chamber, and conversely shortens the component perpendicular to the jet to reduce the wall contact flow of the vortex and reduce the fluid energy loss.

Embodiment An embodiment of the fluid oscillating device of the present invention will be described below with reference to FIGS. 1 to 4.

In FIG. 1, the fluid oscillation element 1 has a laminated structure of an element base 2, an upper plate 3 and a packing 4, and a supply flow path pipe 5 is attached to the element base 2.

FIG. 2 shows a flow path pattern formed on the element substrate 2,
6 is a supply channel, 7 is a supply nozzle, and the supply channel 6 is attached at a right angle to the supply nozzle 7. 8 and 9 are atmosphere communication ports 10 and 11 which are located downstream of the supply nozzle 7 and communicate with the outside.
And the downstream end has upper and lower vortex chambers in the shape of the throttle portion 12, 13 and 14 are side walls provided on both sides of the downstream portion of the throttle portion 12, 15 is an output path, and 16 is formed at the downstream opening end of the side walls 13 and 14. It is a spout.
Further, the vortex chambers 8 and 9 make the length of the component parallel to the flow longer than the length of the component perpendicular to the flow, and 10 and 11 are the center of the length of the component parallel to the flow of the vortex chamber. Equivalent or located upstream.

FIG. 3 shows the operating state of the element. F is a jet flow, and V is a vortex generated in the vortex chambers 8 and 9 which is attracted by the main jet.

FIG. 4 shows a state when the liquid supply to the element is stopped, L is the liquid surface, and A is the gas layer.

The operation based on the above configuration will be described.

The liquid that has flowed into the supply channel 6 is supplied from the supply channel to the supply nozzle 7
Flow into. This jet flow is deflected by the pressure difference between the left and right of the vortex chambers 8 and 9. Now, assume that the pressure in the left vortex chamber 8 is low and the pressure in the right vortex chamber 9 is high due to the unstable phenomenon of the jet flow. Due to the attraction of the main jet F, the main jet F forms vortices on both sides of the main jet F and is deflected to the left. Main jet F
Due to the deflection, the distance between the main jet F and the throttle portion becomes smaller, the amount of air flowing out together with the main jet F decreases, and the pressure in the vortex chamber 8 rises with time.

On the other hand, in the vortex chamber 9 on the right side, the distance between the main jet F and the throttle portion increases, the amount of air flowing out together with the main jet F increases, and the pressure in the vortex chamber 9 decreases with time. This pressure change rate is determined by the ratio of the amount of air flowing out together with the main jet F and the amount of air flowing into the vortex chamber from the atmosphere.

When the pressure change in the left and right vortex chambers progresses and the right side pressure becomes lower than the left side pressure, the vortex chamber differential pressure becomes high on the left side and becomes low on the right side. Due to the pressure difference between the vortex chambers, the flow deflected to the left is deflected to the right. A long component parallel to the jet of the vortex increases the compressibility effect of the vortex chamber pressure and increases the deflection of the jet, and conversely, shortening the component perpendicular to the jet reduces the loss generated on the wall surface of the vortex. Hereinafter, the same operation as described in the case of the leftward deflection also occurs during the rightward deflection.

When the oscillating injection is finished, the liquid in the element flows out into the atmosphere through the atmosphere communication port, and the liquid level drops to the position shown in FIG. 4L. On the contrary, the air layer is almost the entire vortex chamber as shown in FIG. 4A. This air swirls in the vortex chamber as described above when the liquid is subsequently jetted from the supply nozzle and oscillates, and affects the vortex chamber pressure change. That is, due to the compressibility of a large amount of air in the vortex chamber, the pressure change in the vortex chamber becomes slow and the self-oscillation cycle becomes long.

Advantageous Effects of Invention 1. Due to the effect of bubbles included in the vortex in the vortex chamber, low-frequency oscillation with a long oscillation period is possible, and the adhesion of the jet to the side wall is ensured. As a result, an oscillating jet with little scattering is obtained, and when this oscillating element is used for washing or the like, a high washing effect is obtained.

2. The amount of water retained in the element is reduced, and when the device is reused after being stopped, it is possible to reduce the treatment operation of the residual liquid component and to prevent damage due to freezing of the residual liquid component.

3. The compressive effect is enhanced in the jet of vortex chamber pressure, the energy loss of the vortex is reduced, and oscillation is stabilized.

[Brief description of drawings]

FIG. 1 is a perspective view of a fluid oscillating device showing an embodiment of the present invention, FIG. 2 is a flow path pattern diagram of the same fluid oscillating device, and FIG.
4 and 5 are operation state diagrams showing the operation of the fluid oscillating device, and FIG. 5 is a flow path pattern diagram of the conventional oscillating device. 6 ... Supply channel, 7 ... Supply nozzle, 8, 9 ... Vortex chamber,
10, 11 …… Atmosphere communication port, 12 …… Throttle section, 13,14 …… Sidewall, 15 …… Output path, 16 …… Output port.

Claims (1)

[Claims] 1. A fluid element body having an ejection port formed upward, an output flow path consisting of left and right sidewalls at the lower portion of the ejection port, a vortex chamber having an atmosphere communication port, and a supply nozzle are sequentially formed. In the vortex chamber, the length of the component parallel to the flow is made longer than the length of the component perpendicular to the flow, and the atmosphere communication port provided in the vortex chamber is equal to the center of the length of the component parallel to the flow of the vortex chamber. Or a fluid oscillation element located above.