JPS63158305A - Fluid oscillation element - Google Patents

Abstract

PURPOSE:To elongate an oscillation cycle and thereby enable a low frequency oscillation to be generated in the element in the caption for the injection nozzle of a dish cleaning device or the like, by providing displacing wall surfaces which displace according to a pressure in a part of each of vortex chambers that determine the change of the pressure of self-oscillation. CONSTITUTION:Between a supply nozzle 7 and an exhaust nozzle 15 are formed vortex chambers 8, 9 which have holes 10, 11 communicating with the atmosphere. In a part of each of the vortex chambers 8, 9 is provided each of displacing wall surfaces 17, 18 which displaces according to a pressure. At the time of oscillation, therefore, as the change of an inner pressure can be slowed by means of the effect of the displacing wall surfaces 17, 18 a self-oscillation cycle can be elongated by elongating the time of alternate changeover. Then, the adhesion of a jet to a side wall is surely done and an oscillation jet having slight diffusion of jet is obtained. As a result, if the device is used for cleaning and the like, the cleaning effect is improved.

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 2
1. It consists of a supply nozzle 22, side walls 23.24 on both sides downstream of the supply nozzle 22, pawls 25.26 provided at the ends of the side walls, and upper and lower output paths 27.28.

The fluid flowing into the above-mentioned structure through the supply channel 21 is ejected from the supply nozzle 22. This jet is diverted by pawls 25,26. If the jet is now bent downward, part of the jet will be diverted by the lower pawl 25 and flow into the lower chamber, increasing the rotational energy, internal pressure, etc. of the lower vortex.

- The fluid in the vortex chamber on the sumo wrestler side flows out from the gap between the pawl 26 and the jet, and is directed to the output path 28 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 28. The above conditions are repeated alternately, causing oscillation.

In the conventional oscillation element described above, the oscillation frequency is basically determined by the volume of the vortex chamber. In the case of incompressible fluids such as liquids, this is how low frequency oscillations occur. In particular, it is extremely difficult to generate low-frequency oscillations with small oscillation elements used in cleaning equipment nozzles, etc.Problems to be Solved by the InventionIn order to solve the above problems, we have developed A part of the chamber is provided with a displacement wall surface that displaces in response to pressure, and the volume of the vortex chamber changes during oscillation.This volume change lengthens the oscillation period and enables low-frequency oscillation.

The jet jet ejected from the supply nozzle of the working element is deflected by the difference in internal pressure and the rotational energy of the vortices on both sides of the jet generated in the vortex chamber, and is further attached to the side wall of the output path downstream of the vortex chamber, and the jet nozzle is deflected by the jet nozzle. More sprayed. In this jet deflection, part of the jet is fed banked in the vortex chamber, and the difference in rotational energy and internal pressure between the left and right vortices of the jet is alternately changed, causing self-oscillation.

By delaying the internal pressure change at this time by the effect of the displacement wall due to pressure, the time for alternate switching is lengthened, and the self-oscillation period is lengthened.

EXAMPLE An example of the fluid oscillation device of the present invention will be described below with reference to FIGS. 1 to 7.

In FIG. 1, a fluid oscillation element 1 has a laminated structure of an element base 2, an upper plate 3, and a packing 4, and a supply channel 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 right angles to the supply nozzle.

8.9 is located downstream of the supply nozzle 7, has an atmosphere communication port 10.11 that communicates with the outside, the downstream end is the constriction part 12, left and right swirl chambers in shape, and 13.14 are the downstream sides of the constriction part 12. The left and right side walls 15 are provided at the downstream opening ends of the side walls 13. The side walls 13, 14 have a certain degree of divergence depending on the purpose of use of the jet stream.

FIG. 3 is a plan view of the upper plate 3, which has a step 16 forming a groove to prevent the packing 4 from slipping.

FIG. 4 is a plan view of the packing 4, which is attached at a position corresponding to a part or the whole of the left and right vortex chambers 8.9, and has displacement wall surfaces 17.18 that are displaced by the internal pressure of the vortex chambers. .

FIG. 5 shows a cross section of the displacement wall surface 17.18 of the packing 4, and the displacement wall surface 17.18 has a thinner wall structure than the other parts of the packing 4. As shown in FIG.

6 and 7 show the operating state of the element, where Fi is the main jet flow, Fo is the jet flow, and VL and VR are vortices induced by the main jet flow and generated in the vortex chamber 8.9. FIG. 7 19.20 shows the situation when the displacement wall 17.18 is displaced by the chamber pressure.

The operation based on the above configuration will be explained.

The fluid flowing into the supply flow path 6 flows through the supply nozzle 7 into the vortex chamber 8
．． Gushes to part 9. This jet stream is deflected by the pressure difference between the left and right vortex chambers 8.9. Assume now that the pressure in the left vortex chamber 8 is low and the pressure in the right vortex chamber 9 is high. In this case, the main jet Fi is deflected to the left, hits the left side of the constriction part 12, is further deflected by adhering to the left side wall 13 of the output path, and is ejected from the jet nozzle 15 (FIG. 6 F0). At this time, the part of the flow that hits the constriction part and is divided flows along the wall of the left vortex chamber 8 and forms a vortex VL. This vortex VL gradually increases the pressure in the vortex chamber 8.

On the other hand, the fluid in the right vortex chamber 9 is attracted by the jet and discharged together with the jet, and the pressure inside the vortex chamber decreases. As this pressure decrease progresses and the vortex chamber pressure on the right side becomes lower than the vortex chamber pressure on the left side, the vortex chamber differential pressure becomes higher on the right side and lower on the left side. This differential pressure between the vortex chambers causes the flow that was deflected to the left to be deflected to the right. Once the stone side deflection is complete, the same actions described for the left side deflection occur during the right side deflection. Such a deflection operation is repeated and self-oscillation occurs. On the other hand, Patsukin 4
When the pressure in the left side vortex chamber 8 is low and the pressure in the right side vortex chamber 9 is high due to left side deflection, the left side displacement wall is located at the position indicated by the dotted line 19 in Figure 7, and the right side displacement wall is located at the position indicated by the dotted line 19 in Figure 7. Figure solid line 18
The position will be . As a result, the volume of each vortex chamber 8.9 has changed, and in accordance with this change, the pressure change time in the vortex chamber becomes longer, and the self-oscillation period becomes longer.

The atmosphere communication port 10.11 has a breathing function that expands the atmosphere inside the vortex chamber, or conversely releases the liquid inside the vortex chamber to the outside, depending on the pressure difference between the vortex chamber 8.9 and the atmosphere. This breathing action improves the stability of self-oscillation.

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, the flow path becomes simple.

Therefore, there are no troubles caused by jams in the signal path, the operation is stable, and the device manufacturing is facilitated.

26 By enabling low-frequency oscillation with a long oscillation period of the jet, the jet can be reliably attached to the side wall, resulting in an oscillating jet with less jet diffusion. As a result, when used for cleaning etc., the cleaning effect is enhanced.

3. Since part of the packing is a displacement wall, parts can be shared, reliability is improved, and costs are reduced.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a fluid oscillation device showing an embodiment of the present invention, FIG. 2 is a flow path pattern diagram of the same fluid oscillation device, and FIG.
The figure is a plan view of the upper plate of the fluid oscillation element, Figure 4 is a plan view of the gasket of the fluid oscillation element, Figure 5 is a sectional view of the gasket of the oscillation element, and Figure 6 is a state showing the operation of the fluid oscillation element. figure,
FIG. 7 is a sectional view of a packing showing the operating state of the fluid oscillation element, and FIG. 8 is a flow path pattern diagram of a conventional oscillation element. 4...Packing, 6...Supply channel, 7
...Feed nozzle, 8.9 ... Vortex chamber, 1
0.11...Atmospheric communication port, 13.14...
...Side wall, 15... Spout, 17.18...
...displacement wall surface. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 4=-Patsukin 2nd Figure 7j! Figure 13 Figure 4 Figure 5 Figure 6 Required z4 22 5Z3

Claims (2)

[Claims] (1) A supply channel, a supply nozzle, a vortex chamber having an atmosphere communication port downstream of the supply nozzle, an output path located downstream of the vortex chamber and consisting of left and right side walls, and a portion of the vortex chamber are displaced according to pressure. Fluid oscillation element with a displacement wall configuration. (2) The fluid oscillation element according to claim 1, wherein the displacement wall surface is provided with a thin wall portion in a part of the sealing packing.