JPS63152704A - Fluid oscillating element - Google Patents

Abstract

PURPOSE:To enable oscillation to be securely produced, by causing an adhesion phenomenon of jet flow on the jet outlet side wall parts on the downstream side of a vortex chamber. CONSTITUTION:Gas introducing ports 10, 11 are provided in upper and lower vortex chambers 8, 9, and the downstream end of these chambers is made to be a throttle part 12. And, on both sides situated on the downstream side of the throttle part 12, side walls 13, 14 are provided, and at the downstream open end of the side walls 13, 14, a jet port 15 is formed. Further, the side walls 13, 14 are arranged so as to have some amount of setback 16, 17 to the throttle part 12, facilitating the occurrence of low-pressure vortexes between the side walls 13, 14 and jet flow. By this constitution, the deviation of flow becomes very strong, thus the oscillation can be securely produced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fluid oscillation element used in a spray nozzle of a washing device or a water spray device that washes tableware or the human body by spraying washing water.

Prior Art A conventional oscillation element is shown in FIG. This element is the supply channel 1
8. The supply nozzle 19 is composed of side walls 20.21 on both sides downstream of the supply nozzle 19, pawls 22.23 provided at the ends of the side walls, and upper and lower output paths 24.25.

The fluid that flows into the above-mentioned configuration from the supply channel 18 is ejected from the supply nozzle 19. This jet is divided by a pawl 22.2a. If the jet is now bent downward, a portion of the jet is divided by the lower pawl 22 and flows into the lower vortex chamber, increasing the rotational energy, internal pressure, etc. of the lower vortex.

On the other hand, the fluid in the upper vortex chamber flows out from the gap between the pawl 23 and the jet, and is directed to the output path 24 together with the jet.

Therefore, the rotational energy, internal pressure, etc. of the upper vortex are reduced, and combined with the increase in the rotational energy, internal pressure, etc. of the lower vortex, the jet is bent upward on the opposite side and flows out from the output path 25. The above conditions are repeated alternately, causing oscillation.

In the above-mentioned conventional oscillation element, the ejection from the supply nozzle 'fc
The flow is accompanied by energy loss due to the vortices generated in the vortex chamber, and the jet stream is disturbed. As a result, the convergence of the jet flow ejected from the output path is weakened, resulting in disadvantages such as a decrease in momentum per unit area of the jet flow.

Problems to be Solved by the Invention In order to solve the above-mentioned problems, an adhesion phenomenon of the jet flow is caused on the side wall of the jet outlet downstream of the vortex chamber, and the diffusion of the jet flow is suppressed, and the oscillation of the jet flow is made intermittent. , which aims to increase the momentum per unit area of the ejected jet.

The jet stream ejected from the supply nozzle of the working element is deflected by the rotational energy and internal pressure difference between the vortices on both sides of the jet generated in the vortex chamber, and furthermore, the jet stream adheres to the side wall of the jet outlet downstream of the vortex chamber. , is injected from the nozzle. This jet deflection is achieved by feeding back a part of the main jet at the vortex ridge, alternating the difference in rotational energy and internal pressure between the vortices on the left and right sides of the jet.
This causes self-oscillation.

EXAMPLE An example of the fluid oscillation device of the present invention will be described below with reference to FIGS. 1 to 5.

In FIG. 1, a fluid oscillation element 1 includes an element substrate 2, an upper plate 3,
, a packing 4, and a supply channel pipe 5 is attached to the element substrate 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 right angles to the supply nozzle 7. 8.9 is a gas inlet 10.9 located downstream of the supply nozzle 7 and communicating with the outside.
11 and upper and lower vortex chambers having a downstream end shaped like a constriction part 12;
．． Reference numeral 14 indicates a side wall provided on both downstream sides of the throttle portion 12, and reference numeral 15 indicates an ejection port formed at the downstream opening end of the side wall 13.14. Furthermore, the side walls 13,14 are arranged with a setback amount of 16,17 with respect to the constriction portion 12, facilitating the generation of low pressure vortices between the side walls and the jet.

Figures 3, 4, and 5 show the operating states of the element, where F is the main jet flow, Fi is the jet flow, and VL% vu is the vortex generated in the vortex chamber 8.9 induced by the main jet flow. , AL, Au are low-pressure vortices generated between the jet and the attached wall 13, 14 due to the fluid entrainment action of the jet.

The operation based on the above configuration will be explained.

The liquid flowing into the supply channel 6 is transferred from the supply channel to the supply nozzle 7.
flows into. This jet stream is deflected by the pressure difference above and below the vortex chamber 8.9. Now, suppose the pressure in the lower vortex chamber 8 is low,
Assume that the pressure in the upper vortex chamber 9 is high. The main jet flow Fi tilts downward, hits the lower constriction section, further forms an attached vortex AL at the setback section, adheres to the lower wall, is deflected downward, and is ejected from the ejection port 15 (third Figure FO1). At this time,
A portion of the flow that is split upon hitting the constriction portion flows along the wall of the lower vortex chamber 8, forming a vortex VL.

On the other hand, the air in the upper vortex chamber 9 is attracted by the jet and discharged together with the jet, and the pressure in the vortex chamber 9 decreases. As this pressure decrease progresses and the pressure on the upper side becomes lower than the pressure on the lower side, the vortex chamber differential pressure becomes higher on the lower side and lower on the upper side. Due to this pressure difference between the vortex chambers, the flow that had been deflected downward is deflected upward, passes through the midpoint shown in FIG. 4, and then reaches the upper setback section 17 as shown in FIG. An attached vortex Au is formed, which adheres to the upper wall 14, is deflected upward, and is ejected from the ejection port 15.

Hereinafter, the same operation as described in the case of lower deflection occurs also during lower deflection. Such deflection operations are repeated and self-oscillation occurs. Particularly, in the above operation, the jet flow deflected by the pressure difference generated in the vortex chamber further generates a low-pressure vortex downstream of the constriction part, thereby expanding the deflection of the jet flow and making the deflection stronger.

Further, the frequency of this oscillation and the stability of the oscillation are greatly influenced by the characteristics of the communication port 10.11 between the vortex chamber and the atmosphere.

The frequency and stability of oscillation can be controlled by the relationship between the opening area of the communication port, the white outline of the vortex chamber, and the opening position.

Effect 1 of the invention: As described above, since the flow path configuration does not have a signal path such as a feedback flow path, there is a single flow path. Therefore, there is no trouble caused by clogging of the signal path, the operation is stable, and the device manufacturing is facilitated.

2. In addition to the deflection of the vortex chamber, the low-pressure vortex adhesion downstream of the constriction part is utilized, so the deflection is extremely strong. Therefore, oscillation is ensured. In addition, the effect of preventing jet flow from scattering after adhesion of the side wall makes it possible to prevent a drop in the collision force of the jet flow.

3. The oscillation of the jet flow becomes stable due to the action of the attracted air, and the turbulent action of the main jet flow is added, promoting the discontinuation of the flow and growing into particles. As a result, the collision force of the jet stream increases and the cleaning effect improves.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a fluid oscillation element showing an embodiment of the present invention, FIG. 2 is a flow path pattern diagram of the same fluid oscillation element, and FIG.
4 and 5 are operating state diagrams showing the operation of the fluid oscillation element, and FIG. 6 is a flow path pattern diagram of a conventional oscillation element. 6... Supply channel, 7... Supply nozzle,
8.9...9.・Vortex chamber, 10. It... Atmospheric communication port, 12... Throttle part, 13.14...
...Side wall, 15... Spout, 16.17...
Second...Setback. Otsu-cI Rei 2nd Road 7--I only (No. No.2 Figure 2 Figure 3 F1

Claims (2)

[Claims] (1) A supply flow path, a supply nozzle, a vortex chamber located downstream of the supply nozzle, whose downstream end is in the shape of a constriction part, and which generates a vortex by a jet flow from the supply nozzle; The side wall is arranged to have a setback amount with respect to the constriction portion so that the fluid flowing in from the supply path is deflected by the vortex chamber differential pressure and then further deflected by the attached vortex. A fluid oscillator was installed. (2) The fluid oscillation element according to claim 1, wherein the vortex chamber is configured to have communication ports to the atmosphere on the left and right sides, and the openings enable oscillation control by changing the vortex chamber differential pressure.