JPH05567B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a spraying device such as a washing device for washing dishes, a human body, etc. by spraying washing water, and a water sprinkling device for melting snow.

Structure of conventional example and its problems As shown in Figs. 1 and 2, the conventional cleaning injection device has a self-oscillating pure fluid element at the tip of a movable cylinder 2 that slides on the inner cylindrical surface of a fixed cylinder 1. 3 is installed. As shown in FIG. 2, the oscillation type pure fluid element 3 is provided with a control flow path leading from the output flow paths 4, 4' to the control ports 5, 5' on the opposite side, and the oscillated low pressure is transmitted to the output flow paths 4, 4'. The jet stream ejected from the nozzle 6 is automatically switched and self-oscillates. In the above-mentioned conventional configuration, the pure fluid element cannot be controlled to oscillate or stop using an external signal, and the jet flow is always an oscillating jet pattern that spreads out in a fan shape. Therefore, when used in cleaning equipment, etc., cleaning with a highly directional jet flow pattern,
In other words, it was not possible to carry out powerful cleaning.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and aims to make it possible to change the jet flow pattern ejected from a nozzle depending on the purpose of use.

Structure of the Invention In order to achieve the above object, the present invention provides a liquid pressure pump on the upstream side of a two-phase fluid oscillation element consisting of a supply nozzle and an adhesion wall, and further provides a suction pressure of the pump on the suction side of the pump. This configuration is provided with a gas inflow control means for introducing gas. With this configuration, the two-phase fluid oscillation element can be switched between oscillation and non-oscillation by controlling the gas inflow from the gas inflow control means.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 to 8.

In FIGS. 3 and 4, reference numeral 7 denotes a two-phase fluid oscillation element for generating a jet flow, which is attached to the tip of a movable cylinder 9 that moves in and out of the inner cylindrical surface of a fixed cylinder 8 by the action of water pressure and a spring. Reference numeral 10 denotes a spring for retracting the movable cylinder 9 into the fixed cylinder 8 when no pressure is applied by the supplied fluid. The two-phase fluid oscillation element 7 is composed of left and right side walls 12, 13 of the supply nozzle 11, and an outlet 14 formed by the open ends of the side walls, and has a two-dimensional structure in which the flow path is constrained by the upper and lower surfaces. The cleansing toilet seat main body 15 is installed on the toilet bowl 16 and is composed of a heated toilet seat 17 and a washer unit 18. Cleaner unit 18
A power switch 19, a flow rate adjustment knob 20, and an operation knob 21 for gas inflow control means are attached to the. 22 is a toilet seat lid.

FIG. 5 shows the system configuration of the toilet seat, particularly the water circuit configuration. A liquid pressure pump 23 is connected to a gas inflow control means 24 and a hot water tank 25 on the suction side, and to a cleaning nozzle 27 via a flow rate adjustment valve 26 on the discharge side. The liquid pressure pump 23 is preferably a positive displacement pump that is stable even when gas flows in, and in this embodiment, a vane type pump is used. The inflow side of the hot water tank 25 communicates with a water storage tank 28 such as a cistern.

FIG. 6 shows the operating state of the two-phase fluid oscillation element 7 during steady injection, and FIGS. 7 and 8 show the operating state of the two-phase fluid oscillation element 7 during oscillation injection,
F ₁ , F ₂ , F ₃ are jet flows, V ₁ , V ₂ are low-pressure vortices, B ₁ ,
B ₂ and B ₃ represent gases introduced from the outside.

The operation based on the above configuration will be explained. When cleaning, turn on the power switch 19 and set the flow rate using the flow rate adjustment knob 20. The movable cylinder 9 of the cleaning nozzle is moved by the water pressure of the liquid pressure pump 23.
The force of the spring 10 is overcome and the two-phase fluid oscillation element 7 is protruded, and the two-phase fluid oscillation element 7 is set in the cleaning position. When the gas inflow control means 24 is closed in this state, the fluid pumped from the liquid pressure pump 23 becomes a liquid flow containing no gas. This liquid stream is ejected from the supply nozzle 11 between the side walls 12 and 13, but due to the Coanda effect that occurs between the jet stream and the side walls, either the left or right wall, the wall on the side where a stable state is detected earlier (in Fig. 6, the lower wall) It adheres to the wall 12) and flows out. The attached flow is ejected into the atmosphere from the outlet 14 (FIG. 6, F ₁ ). Note that the jet flow can be made to adhere to a fixed side by making the shape, position, etc. of the wall asymmetrical.

Next, the operation knob 21 is turned to open the gas inflow control means 24 and communicate with the atmosphere. Liquid pressure pump 2
3 inhales air as well as water. Therefore, the liquid fed by the liquid pressure pump 23 becomes a two-phase fluid in which the atmosphere (B ₁ in FIG. 7) is mixed into the liquid. When the two-phase fluid enters the liquid element and is ejected from the supply nozzle 11, a portion of the mixed gas flows into the low-pressure vortex V ₁ (FIG. 7 B ₂ ). The gas B ₂ flowing into the low-pressure vortex portion V ₁ destroys the low-pressure state of the vortex, making the attachment of the jet flow F ₂ unstable. As a result, the jet flow F ₂ adhering to the wall 12 separates from the wall 12. Due to the change in inertia and pressure during this separation, the jet flow F ₂ is directed to the opposite wall 13.
adheres to the wall 13 and forms a low-pressure vortex _V2 .
It is ejected into the atmosphere from the outlet 14 along the direction (F ₃ in Fig. 8). Thereafter, the above operation occurs on the wall 13, and the jet flow alternately attaches between the walls 12 and 13, forming an oscillating flow.

As described above, it is possible to change between the non-oscillating fixed jet pattern and the oscillating flow pattern, and in the case of a cleansing toilet seat, the user can select strong cleaning, soft cleaning, etc. according to the user's preference.

Effects of the Invention (1) Remote control is easy because oscillation control of the fluidic element can be performed via the main flow path.

(2) The control signal is air flow, and the control is the opening and closing of the air communication port, so reliability can be ensured even in places with poor environmental conditions, such as on a toilet seat.

(3) When used for cleaning, mixing gas into the jet will double the soft feel of the jet. Therefore, soft cleaning with minimal detergency is possible.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example, Fig. 2 is a sectional view of a fluid oscillation element showing a conventional example, Fig. 3 is an external view showing one embodiment of the fluid ejection device of the present invention, and Fig. 4 is the same as above. An enlarged sectional view of the nozzle part, FIG. 5 is a system configuration diagram of the same cleaning device as above, FIG. 6 is a sectional view showing the state of jet flow attached to the two-phase fluid oscillation element as above, FIGS. 7 and 8.
The figure is a sectional view showing the state of jet flow adhesion when gas flows into the same element. 7... Two-phase fluid oscillation element, 11... Supply nozzle, 12, 13... Adhering wall, 14... Outlet, 2
3... Liquid pressure pump, 24... Gas inflow control means, 27... Cleaning nozzle.

Claims (1)

[Scope of Claims] 1. A two-phase fluid oscillation element composed of a supply nozzle, an attached wall provided on the downstream side of the supply nozzle, and a jet flow outlet provided on the downstream side of the attached wall, and a liquid provided on the upstream side of the oscillation element. A fluid injection device comprising a pressure pump and a gas inflow control means provided on the suction side of the pump and introducing gas by the suction pressure of the pump. 2. The fluid injection device according to claim 1, wherein the liquid pressure pump is a positive displacement pump capable of simultaneously pumping liquid and gas.