Fluid sprinkling – spraying – and diffusing – Fluid pressure responsive discharge modifier* or flow... – Fuel injector or burner
Patent
1997-06-16
1999-10-05
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Fluid pressure responsive discharge modifier* or flow...
Fuel injector or burner
239570, 239574, 137505, 137509, B05B 130
Patent
active
059610514
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a shower apparatus in which a shower head portion thereof contains an opening valve, a flow adjusting valve and the like and, more particularly, a shower apparatus designed to resist damage by water hammer or the like which may occur when such valve is closed.
General types of shower apparatuses provided in bathrooms contain a shower head connected to a hot water/cold water mixing plug through a hose.
Turning-on and stopping of the water flow is carried out by means of a select handle on a hot water/cold water mixing plug or an opening valve provided in the shower head as disclosed in Japanese Utility Model Publication No. Sho 58-53118.
If the opening valve is suddenly closed in the type in which water feeding and discharge are carried out on the shower head side, water hammer occurs in the primary side of the opening valve, i.e., in a flow route between the hose and the hot water/cold water mixing plug. If water hammer occurs, pressure in the internal flow route rises and at the same time, the pressure changes suddenly. As a result, deterioration in pressure resistance of the hose is induced by vibration of the hose or increase in the internal pressure thereof.
To solve the water hammer problem, it is effective to provide the water plug side with a pressure responding valve or the like for cushioning an increase in the internal pressure as disclosed in Japanese Utility Model Publication No. Sho 58-32753. With the pressure responding valve, a chamber sectioned by a diaphragm is made to communicate with the flow route up to the water discharge device, and the increase in internal pressure which occurs when a valve containing this water discharge device is closed is absorbed by deformation of the diaphragm.
As a mechanism for preventing the aforementioned water hammer phenomenon, various methods are already known, and structures for absorbing or releasing an increase in internal pressure as disclosed in the preceding patent publication are basic ones.
In addition to the above described mechanism for preventing water hammer, as disclosed in Japanese Unexamined Utility Model Publication No. Hei 6-5588, a pressure adjusting valve for adjusting the pressure of mixing water to be fed to the shower head is incorporated in the flow route in the upstream end of the shower hose so that primary side pressure is not applied to the shower hose when the opening valve of the shower head is closed.
If an opening valve for discharging water and stopping thereof is provided, the main body of the shower head is held by one hand and the knob of the opening valve is operated by the other hand. In this case, it is preferable from the viewpoint of usability that operations for stopping the discharge of water, and inverse operations, can be carried out quickly. Thus, a mechanism which opens and closes the flow route all at once by employing a push-button type opening valve is employed so as to quicken valve closure.
If the opening valve closes quickly, the amount of water hammer is increased and the internal pressure on the hose side in the downstream end is changed largely all at once, so that loading of the internal pressure to the hose when water hammer occurs is consistently repeated. It is effective to apply the pressure responding valve as disclosed in the preceding patent publications corresponding to such water hammer.
However, although a diaphragm for absorbing changes in pressure can stabilize pressure in the hose by elastic deformation of the diaphragm even after the pressure responding valve has been closed, the effect thereof in reducing a rise in pressure just after water hammer occurs is limited. Further, if a valve body is provided which is activated to temporarily expand the volume of the internal flow route in correspondence with an increase in pressure, and at the same time close the internal flow route, it is also possible to suppress the increase in pressure which occurs when water hammer occurs. However, after this valve body is moved, response to changes
REFERENCES:
patent: 594787 (1897-11-01), Gallagher
patent: 1536531 (1925-05-01), Schermann
patent: 2208031 (1940-07-01), Hooper
patent: 3512525 (1970-05-01), Crowley, Jr. et al.
Enoki Masatoshi
Matsui Hideyuki
Bocanegra Jorge S.
Kashnikow Andres
Toto Ltd.
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