Fluid sprinkling – spraying – and diffusing – Combining of separately supplied fluids – Serially arranged mixing zones
Patent
1989-10-26
1991-10-29
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Combining of separately supplied fluids
Serially arranged mixing zones
239124, 239310, 239428, B05B 704
Patent
active
050608665
DESCRIPTION:
BRIEF SUMMARY
The present invention refers to a device in washing and rinsing apparatuses for continuously creating a foam, and conveying this to a nozzle, which device incorporates an injector, to the pressure side of which is connectable a driving medium, e.g. water under pressure, and the suction side of which is connectable to a liquid, foam-forming detergent.
BACKGROUND OF THE INVENTION
When cleansing with washing and rinsing apparatuses it very often occurs that the object to be cleansed must be subjected to cleansing with a chemical detergent during the cleansing procedure. This detergent is usually added to the cleansing liquid, which generally is water, by means of an injector. The detergent thus is admixed with rinsing water, which furthermore may have an increased water pressure, if the washing and rinsing apparatus is a high pressure apparatus. As the addition of the detergent occurs in connection with the rinsing, only a small part of the detergent supplied will actively take part in the dissolving of the dirt. The major part of the detergent is flushed away when the jet of water hits the object to be cleansed. Manual application of the detergent has therefore been resumed, whereby the detergent will have a possibility actively to act upon the layer of dirt.
From U.S. Pat. No. 4,505,431 is earlier known a foam-forming device, wherein water causes injection of a foam-forming fluid in an injector, which is also connected to a source of pressurized air, in such a manner that pressurized air is supplied to an annular slot around the injector diffusor. The quantity of air supplied in relation to the water quantity flowing through is rather small, which means that a foam of high water content is formed, i.e. a foam of rather short duration. The big excess of water in the foam furthermore causes the detergent to be heavily diluted resulting in an inferior cleansing effect.
PURPOSE AND MOST ESSENTIAL FEATURES OF THE INVENTION
The purpose of the present invention is to provide a device in known washing and rinsing apparatuses, which can be used for low pressure apparatuses, operating at the pressure of the water mains, as well as for high pressure apparatuses (water pressure of between 50 and 200 bar) and with which a foam treatment, i.e. dissolving of the "dirt" with foamed detergent can be effected, whereby the water consumption is as low as possible and therefore also the quantity of detergent supplied, and which quantity can furthermore be controlled. Another purpose is to provide a device by means of which it is possible to create a rich foam of long duration and also by shifting a valve making possible rinsing with the same equipment and without limitation of the water quantity. These tasks have been solved in that the spray nozzle of the injector is designed with an elongated, cross-sectionally very small hole, adapted to press the driving medium as a very thin jet into the diffusor of the injector, that the diffusor is slightly conical and on the inlet side provided with a portion of bigger, preferably much bigger cross-sectional area than the hole of the spray nozzle and that the diffusor is arranged to open in an expansion chamber, to which is connectable a pressurized gas, e.g. air, for transport of the foam created therein to said nozzle.
DESCRIPTION OF THE DRAWINGS
The invention will hereinafter be further described with reference to an embodiment.
FIG. 1 shows the device according to the invention in a front view.
FIG. 2 shows a section through the valve body according to FIG. 1 in a somewhat bigger scale.
DESCRIPTION OF EMBODIMENT
The device according to the invention consists of a valve body 11 in which is included an injector 12 having on the pressure side 14 a connection 13 for a driving medium and on the suction side, a connection 15 for a detergent. The driving medium in most cases is water under pressure. Behind the diffusor 16 of the injector as seen the direction of water flow is a room 17 in which is arranged the spray nozzle 18 of the injector. This spray nozzle is a plug provide
REFERENCES:
patent: 1532809 (1925-04-01), Girard
patent: 1594641 (1926-08-01), Starr
patent: 2920579 (1960-01-01), Grimm
patent: 2931580 (1960-04-01), Johnson
patent: 3201049 (1965-08-01), Hayes
patent: 3250476 (1966-05-01), Kenk
patent: 3430865 (1969-03-01), McDougall
patent: 3473481 (1969-10-01), Brane
patent: 4505431 (1985-03-01), Huffman
Kashnikow Andres
Trainor Christopher G.
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