Gas and liquid contact apparatus – Contact devices – Injector type
Patent
1996-02-23
1997-10-14
Miles, Tim R.
Gas and liquid contact apparatus
Contact devices
Injector type
261DIG7, 137 98, B01F 304
Patent
active
056768885
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to ecological quality improvement of normal water for domestic use (tap water) for one or both of skin and hair treatment, particularly in connection with CO2 compressed gas cartridges being suited and intended for using with said apparatus. From the German patents DE4124728C2, DE4117023.7C2, DE4200467C2 apparatuses and CO2 compressed gas cartridges--suited for use with said apparatuses--are known, which apparatuses and cartridges serve for an ultra-fine or micro-impregnation of normal water for domestic use (tap water) with CO2 in a simple and effective way, so that said water may be used for natural body and hair care, e.g. in connection with usual shower arrangements, whereby the empty cartridges to be disposed remain as waste (throw-away products).
2. Prior Art
The object of the invention is to improve said apparatuses and the CO2 compressed gas cartridges belonging to them under an ecological point of view and with regard to their more universal applicability as well as with regard to a more exact or controlled and dosed addition of CO2 if the water pressure varies or, particularly, if it is low.
In the case of the above mentioned apparatuses, the ultra-fine or micro-impregnation with CO2 compressed gas is controlled by the water pressure in the conduit via a yielding or flexible (elastic) membrane. This control is reliable in case of normal water pressure. However, there are numerous cases of application, e.g. if tap water heated in flow heaters or instantaneous water heaters is used, in which cases the available water pressure is substantially lower than the normal tap water pressure. Thus, the available water pressure may be lower than 1,5 bar. In such cases, in which only a low pressure water source is available, the control by a membrane is not sufficient to guarantee the full function of the automatically adjusted and correctly dosed addition of CO2. For this reason, the invention uses a double diameter or step piston element separating the water-inlet chamber and the compressed gas-inlet chamber. By using a step piston element, an exactly dosed addition of the CO2 gas to the impregnating zone is possible even in case of low water pressure because the pressure on both sides of the piston meets two different surfaces. By preselecting the step piston element, i.e. by predetermining its effective piston surfaces, each particular situation of use may be taken into account in a simple manner, even a low water pressure being in a position to produce the valve control or adjustment power.
The power which is produced on the water side via the bigger of both piston surfaces is in case of very low water pressure already equal to the power which is produced on the other side via the small piston surface and which adjusts itself to the same value only at a much higher CO2 pressure (balance of the piston). By using a double diameter piston element it is therefore possible to control and to adjust much higher CO2 pressure as corresponding to the available tap water pressure.
This measure is of advantage generally in case of low tap water pressure and also particularly in those cases where a particular CO2 check valve is provided, as shown herein. Depending on the intended purpose of use, the ratio of the piston surfaces may vary for example between 1:1 to 1:5 and more; preferably it is about 1:3,5.
In case a compressed gas cartridge with refill valve is used, a direct control of said refill valve by said step piston is made possible so that said refill valve may be used as a discharge or withdrawal valve exactly controlled by the step piston element for a dosed discharge of the CO2 gas into the impregnating zone.
By using a step piston it is also made possible in a simple manner to lock said step piston in a position ineffective with respect to the refill valve by means of an element which is operable from outside in order to be able to supply non-treated water via the apparatus e. g. to the shower head.
The controllable valve may be
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Kohl Horst
Kuckens Alexander
Miles Tim R.
Technica Entwicklungsgesellschaft mbH & Co. KG
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