DE3410621A1 - METHOD AND DEVICE FOR PREPARING LIQUIDS FOR DISCHARGING PLANTS FOR HOUSEHOLD AND HOBBY GARDENS - Google Patents

Abstract

1. Process for the preparation of watering water for household or hobby gardeners, in which the watering water is impregnated with CO2 and fertilizer is dissolved in the impregnated water, characterized in that the water is taken from a normal mains supply pipe at the pressure and the temperature of the pipe and is first conveyed into a control zone in which, by means of the present pressure of the water flowing in, a closing and pressure regulating valve of a CO2 pressure gas source is adjusted, and in that the water is conveyed from the control zone to the entrance end of an impregnation zone which is in the form of an elongated, straight, flow route and in which at least two shoulder-like cross-sectional widenings of the flow route, which widenings are at a distance from each other, the pressure of the water is abruptly lowered and the areas of the water-flow from lowered pressure to the drawing in of CO2 gas into the water stream are brought into contact with a distribution zone via thin, open bores corresponding to the width of the shoulder and being situated in the cross-sectional plane connecting to the annular shoulder, into which distribution zone is conveyed the CO2 gas with the gas pressure controlled by the water inlet pressure, and in that the water is brought into contact with the liquid or solid fertilizers directly after the contact areas with the CO2 distribution zone.

Description

DR.-ING. R. DÖRING - 5 - DIPL.-PHYS. DR. J. FRICKE

BRAUNSCHWEIG MUNICH

Technica Entwicklungsgesellschaft mbH & Co. KG

Robert-Bosch-Str. 4-6 24 18 Ratzeburg

"Method and device for preparing liquids for fertilizer casting of plants for households or hobby gardeners"

The invention relates to a method and a device for preparing liquids for watering plants for fertilization Household or hobby gardener.

It is known that the health of plants, plant growth and their resistance to pest infestation can be significantly improved if the plants are watered with a high proportion of COp introduced by fine impregnation and a correspondingly high proportion of H ₂ CO ₃ . Corresponding systems and devices have been developed to supply horticultural businesses, open-air crops and afforestation areas or the like with such prepared water (cf. German magazine "Der Spiegel" No. 47/1982, pages 99 to 101 or No. 7/1984 , Pages 61 to 63).

3 4 1 Q 6

There are also watering systems and fertilizer systems for household and hobby gardeners known, with which plants or beds over Poured for a longer period of time and to the required extent or over the plants using fertilizer sticks or liquid fertilizers the necessary fertilizers can be supplied.

It is the object of the invention to provide a method and a device for carrying out the method with which the housewife or the hobby gardener in a simple and inexpensive way taken from the normal supply line irrigation water in any desired amount is made available when required, which in an optimal way both with fertilizers and is enriched and mixed with COp and HpCO-.

According to the method, this object is achieved by the steps of claim 1 or by the measures of claim 2.

With this method and the device provided for it, it is possible to use that which is connected to a conventional supply line If necessary, the device can only be started up in the usual way by turning on the tap. All other functions, namely opening the gas cylinder for COp, adjusting the gas pressure to one of the respective Pressure of the water in the supply line adapted pressure, the optimal impregnation of the water with COp and the optimal enrichment of the water with HpCO ^ as well as the mixing of substances in one at the pressure of the Water in the supply line takes over adapted dimensions

the device. The same applies to the cancellation of all these functions by simply closing the tap. To the A common watering hose can be connected to the device. The device itself can also be used to fill watering cans or the like. Vessels are used.

Installation and use of the device are extremely easy. The mixture of the different components in the water can be divided in an optimal way, so that the housewife or the hobby gardener do not have to pay special attention. By shutting off the feed line for the fertilizer, the irrigation water can also be enriched _{exclusively with COp and HpCO 3, if necessary.}

The pouring liquid made available in this way promotes growth, willingness to flower and yield to an unusual degree and resistance of plants to pests or infestation.

The water pressure in the supply line can vary widely, e.g. between 1 bar and 7 bar. Through the direct Pressure control of the withdrawn water for the outlet and reducing valve of the gas pressure vessel is in any case one ensures accurate and simple automatic control of the feed pressure of the COp gas to the contact zone with the water. In this way a fully automatic and accurate one is obtained and reliable control of the feed pressure for the . At the same time you get an extraordinarily high one

Ease of use.

The same applies to the control of the fertilizer supply. The respective pressure of the supply line can also be used for this taken water can be used as the delivery pressure, indirectly by the fact that one of the water pressure controlled feed pressure of the CO ^ gas on the head space or on the outside of a flexible container for lets the liquid fertilizer take effect. The pressure-dependent supply of fertilizer into the contact zone can also be done through Negative pressure take place, as it arises in the individual injector nozzles of the contact zone, also as a function on the pressure of the water in the supply line.

The invention is explained in more detail below with reference to schematic drawings of two exemplary embodiments.

Show it:

Figure 1 in vertical section a device according to the invention in a first embodiment and

FIG. 2 shows a similar representation, but only in a section, a modified embodiment.

In the embodiment of Figure 1, a device block 1 is provided which has a connection 2 for connection to a Has usual water supply line. Such a

Supply line connection point is usually equipped with a shut-off valve. In the device block 1 is a Control chamber 3 is provided, into which the water enters from the line. The inlet pressure of the water can be a function vary within wide limits of the respective supply line, e.g. between 1 bar and 7 bar. Likewise can also the respective temperature of the withdrawn water can be very different.

The respective pressure of the water in the control chamber 3 acts on a membrane A, which via an actuating tappet 8 directly on the movable member 7 of the outlet and reducing valve of a COp pressure vessel 6, e.g. a usual pressurized gas cylinder acts. The pressure vessel 6 equipped with this valve only needs to be connected to it provided standardized connection of the device block 1 to be screwed sealingly. Such a valve closes automatically, if no control pressure is applied to the valve member 7 from the outside.

A gas distribution chamber 5, which is connected to a gas chamber 10 via a throttle point 11, is provided in the device block 1 below the membrane k.

In the device block 1, a flow channel 13 is also provided, the inlet side 14 of which with the control chamber 3 in is free flow connection. The flow channel 13 is preferably straight and elongated and opens

at its lower end at an outlet 28. This can the be a direct outlet for the pouring liquid, e.g. for filling watering cans or other containers but also a common garden hose or the like. Be connected.

In a first section, the flow channel 13 has a plurality of channel sections, the diameter of which is progressively increasing enlarged abruptly. These injector nozzle-like sections are denoted by 15a to 15c. In that of the shoulder-like extension In the following level, the flow channel has a plurality of connection openings 17, which are in free S-flow connection with distribution channels 12, which in turn are connected to the gas chamber 10.

In a further region of the flow channel 13 located in front of the outlet 28, further such sections 16a, 16b are also included abrupt diameter enlargements provided. Here, too, are in the level immediately following the extension shoulder Bores 18 are provided which are in free flow connection with distribution or connecting channels 19. These connecting channels 19 are at their lower end with an area of the flow channel 13 at a distance behind the last injector nozzle 16b connected via bores 20.

In the flow channel 13 protrudes from above centrally and radially Distance from the wall of the flow channel a feed pipe 25, which via a shut-off valve or metering valve 26 with a

Fertilizer supply for liquid fertilizer is connected and opens in the area of one of the injector nozzles 15a to 16b. In the illustrated For example, the mouth 27 lies in the area of the injector nozzle 15c

The device described works as follows:

When irrigation water is required, the tap of the supply line is opened, to which the device block 1 is connected. The water entering the device block 1 when it is opened fills the control chamber 3 and acts on the diaphragm A with the respective pressure. The diaphragm 4 serving as a pressure control is designed in this way and dimensioned so that the reducing valve 7 of the pressure vessel 6 opens at a pressure of 1 bar in the control chamber 3 and COp with a corresponding to the pressure in the control chamber 3 allows reduced pressure to flow out into the chamber 5. The throttle device 11 ensures that the COp gas flowing out in can only reach through the flow channel 13 when the water has entered the flow channel 13 from the control chamber 3 and fills it with its current. When the flow through the flow channel 13 forms in the individual diameter gradations an abrupt decrease in pressure in the water flow. The reduced pressure releases gas from the gas chamber 10,12 sucked in and effectively in finely divided form and avoiding largely larger bubbles mixed into the water. This very fine impregnation is repeated in each injector nozzle 15a to 15c. After the fine impregnation of the water is in the flow channel 13 of the water

the fertilizer added and mixed intimately with the water. The fine impregnation and the intimate mixing is through the downstream injector stages 16a and 16b are still significantly promoted, since in these areas a backmixing of the mixed fluid entering through the bores 20 into the connecting channels 19 with that from the injector nozzle 15c new flowing mixed liquid takes place. The inlet cross-section for the Fertilizers are adjusted. The feed pressure of the liquid fertilizer can be determined by the respective pressure can be set directly or indirectly in the control chamber 3. A simple adjustment of the volumetric feed of the fertilizer per unit of water is achieved by the pressure controlled by the control chamber 3 in the Gas chamber 10 or 12 on the head space of the fertilizer supply or on the outer one of the supply receiving flexible container can act. Thereby a pressure-dependent supply of the fertilizer as well as the beginning and the end of the fertilizer supply as a direct function of the opening or closing of the tap on the supply line achieved. However, the water pressure itself can also be used to advantage directly for emptying the fertilizer container. As FIG. 2 shows, however, the negative pressure prevailing in one or the other of the injector stages 33 can also be in the Flow channel can be used to pressure-dependently the fertilizer from a storage container 38 via the suction line 36 and the riser 39 to suck in, while at the same time the suction of the gas takes place via the gas chamber 32,34.

Instead of allowing the fertilizer to be sucked in from an injector nozzle 33 which is used for gas mixing, between the Injector groups 33 and 35 also have a separate injector stage which is used exclusively for sucking in the fertilizer serves. The suction according to FIG. 2 can also be used in connection with the pressurization of the fertilizer supply can be used by the COp gas pressure in the gas chamber 32,34.

In the embodiment according to FIG. 2, a device block 30 is again provided, which contains all essential parts and connections summarizes the device and thus enables a particularly simple control.

As a modification of the new process, a liquid fertilizer can be used instead a solid fertilizer that is soluble in water can also be used. In this case, the device block is designed in such a way that that the water flow through the flow channel 13 of FIG. 1 each flushed the solid fertilizer and one of the Amount of water dissolves corresponding amount of fertilizer.

The valve 7 is practically a simple shut-off valve which is held in its blocking position by the internal pressure in the container 6 is. The internal pressure is e.g. 60 bar and can fluctuate depending on the temperature.

D.-U5 Flare ratio in the sealing area of valve 7 and Membrani'lclie is e.g. about 1:60. At atmospheric pressure in the device, the container is locked. Now works

Water pressure on the membrane translates this into the pressure effect, which it transfers to the valve by 6o times. The valve opens, gas (cup) flows into chamber 5, from which the outflow, as already described, is throttled.

Compared to a reducing valve controlled by a compression spring, in which the spring pressure remains essentially the same, the membrane 4 translates all fluctuations in the water pressure and thus controls the CO _? -Leakage depending on the water pressure and its fluctuations.

In the case of a small device, it is to be expected that oversized gas bubbles will still emerge from the impregnation system Size are available. These gas bubbles must be filtered off, in such a way that they are the gas impregnation space itself are supplied so that they are not transported to the delivery point. That would mean there that larger vesicles escape into the atmosphere and thus the economy with regard to the use of gas are impaired. This process can be prevented by installing a Spirals, but better by incorporating a meancler-shaped üystotiiu, which runs vertically in the system, where the highest point opens into the gas space. One or more outlet openings can be attached at this point, which allow the lighter gas to escape at this upper point so that it is fed back into the gas space of the injector system while the filtered and finely impregnated water is conveyed into the dispensing zone.

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Claims (10)

PATENTANWÄLTE 341Ö621 DR.-ING. R. DÖRING DIPL.-PHYS. DR. J. FRICKI BRAUNSCHWEIG MUNICH claims 1. A method for preparing liquids for fertilizing plants for the household or hobby gardener, characterized in that water is taken from a conventional supply line with the temperature prevailing in the supply line and the respective pressure in the supply line and initially for pressure-dependent control of the supply of CO _{2 is used} from a pressure source to at least one contact zone with the withdrawn water and is then fed to this contact zone in a flow in which at one or more points of the flow path through the contact zone the pressure is suddenly reduced compared to the withdrawal pressure of the water from the supply line and at the same time Water and COp gas are brought into contact, and that liquid fertilizer is fed to the contact zone and its feed rate per unit of time is controlled as a function of the extraction pressure of the water. 2. Device for preparing liquids for pouring fertilizers von P! 'lances for household or hobby gardeners, characterized by a control chamber (.3), the Can be connected to a standard local supply line (2] and in which the respective temperature L when the connection is open and the respective pressure between 1 bar and 7 bar of the water prevails in the supply line; through a COp pressure vessel (6) with a normally closed outlet and pressure reducing valve (7); by a pressure-dependent control device (A) for controlling the outlet and Pressure reducing valve (7) in a pressure-dependent open position, which control device (4) to the control chamber (3) connectable; through a flow channel (13) which can be connected to the control chamber (3) on the inlet side and which at least two channel sections (15a to 15c) arranged one behind the other in the direction of flow, each with a step-shaped Expansion of the flow cross-section, which expansions each with a COp gas chamber (10,12) are in communication, which can be fed via the outlet and pressure reducing valve (7) and by a supply of liquid Fertilizer that is in flow connection (25, 26) with the flow channel (13) and from the suction pressure in the expanded Channel section (15a-15c) and / or with a delivery pressure corresponding to the pressure in the control chamber (3) can be acted upon. 3. Device according to claim 2, characterized in that that a control and mixing block (1) which can be connected to the supply line is provided which forms the control chamber (3), the pressure-dependent control device (4), the channel sections in the form of injector nozzles (15a-15c) as well as the connections for the COp pressure vessel (6) and the fertilizer supply (25,26) and the outlet or - 3 has the outlet connection (28) for the extraction tap. 4. Apparatus according to claim 2 or 3, characterized in that a control chamber (3) delimiting Diaphragm (4) for direct actuation of the outlet and pressure reducing valve (7) is provided. 5. Device according to one of claims 2 to 4, characterized in that the fertilizer supply is direct through the head space of a storage container or indirectly through a flexible container that receives the supply the pressure in the CCU gas chamber (10, 12) can be acted upon. 6. Device according to one of claims 2 to 5, characterized in that a feed pipe (25) for liquid fertilizer is fixed centrally in the flow channel (13), in an area behind at least the first injector nozzle (15a-15c) opens and has a connection (26) for the fertilizer supply. 7. Device according to one of claims 2 to 4, characterized in that indicates that a suction pipe (36) which can be connected to the fertilizer supply (38) from one of the injector nozzles (33) goes out. 8. Device according to one of claims 2 to 7, characterized g ek e π Ii -δ fich η et that in the St rümungsraum between the CÜp gas chamber (1ü, l2) and the outlet reducing valve (7) -A- a flow throttle device (11) is provided. 9. Device according to one of claims 2 to 8, characterized in that at least one further Injector nozzle (16a, 16b) in the flow channel (13) for backmixing the one finely impregnated with C0 “and with fertilizer like there is no liquid downstream. 10. The device according to claim 2, characterized in that the fertilizer is provided as a solid and the arrangement is made so that the water flowing through the flow channel the solids supply washed down.