ES2311103T3 - SPRAY DEVICE AND METHOD. - Google Patents

Abstract

The aim of the invention is to provide a spray device and a spray method and likewise to create a spray behaviour or spray pattern, which allow spaces or surfaces to be treated to be wet in a substantially comprehensive manner. This is achieved by the inventive spray device, which consists of at least one tubular conduit (1) having two ends (5, 6) and spray orifices (2) for spraying a liquid (3). According to the invention, the two ends (5, 6) of the tubular conduit (1) are connected by elements, which are configured in such a way that the liquid (3) selectively flows at a predetermined pressure through the first and/or second end (5, 6) into the tubular conduit (1) and escapes through the spray orifices (2).

Description

Device and method of spraying.

The object of the present invention is a spray device and a spray method.

The known spray devices, for example, for apple washing facilities, car wash, sprinklers and even dishwashers, etc., they often comprise rotation arms through which the Spray liquid and rotation movement is generated by the return force of the outgoing liquid. These so-called arms Sprayers are fed by a pump with washing liquid. Since conventionally the treatment spaces of, by example, apple washing facilities, car wash and dishwasher, etc., however, also of turf surfaces mainly present a plant rectangular, the corner areas of these spaces or surfaces are only insufficiently reached by the spray arms that describe a trajectory essentially circular. This disadvantage is avoided, by way of example, by tubes with nozzle openings, etc., where they present the disadvantage of spraying only point-shaped areas and, for therefore, the spaces or surfaces that have to be treated are not they can moisturize in all places sufficiently with the liquid to be sprayed.

From document DE 1 177 564 B it is known a device for adjusting the jet stream height.  For the control of the source a system of tubular pipes as well as secondary outlets and taps adjustment. The height of the fountain is controlled by pump control and the activation of the adjustment taps.

From GB 949 954 A a known method and a device for generating a fog of liquid spray The device comprises two pipes of supply that can be subjected to different pressures. Of this mode you can get a rocking spray jet.

JP 100 33451 A describes a dishwasher according to the preamble of claim 1.

Therefore, it is the objective of the present invention provide one that allows to moisturize essentially of completely form spaces or surfaces that have to be treated.

This objective is solved by spray device according to the invention with the characteristics according to claim 1 as well as by the method according to the invention according to the claim 9. Advantageous improvements of the present invention in the dependent claims.

The spraying device according to the invention is composed of at least one tubular conduit that It has two ends, where the two ends of the conduction tubular are joined with means that are configured in such a way that the liquid enters with a predetermined pressure optionally by the first and / or the second end in the tubular conduction. From according to the invention, the tubular conduit has openings sprays that are arranged longitudinally from the tubular conduction, through which the liquid comes out for spray.

Advantageously, the media are configured. as pumps that are connected respectively with the ends of tubular conduction. Properly, the bombs are linked together by a control unit per program and in a way corresponding are controlled by stored program developments in the control unit per program.

In another preferred embodiment of the device spraying according to the invention, the means are configured as a pump and a control unit, distributing this control unit by a rotation element the respective parts of liquid towards the two ends of the conduction tubular.

Properly, the rotation element is configured as a rotating distributor, so that by The rotational speed of the rotating distributor can be influenced in, and therefore, control the spray behavior of the liquid

The spraying device according to the invention uses the physical law that, according to the continuity equation:

A_ {1} * \ nu_ {1} = A_ {2} * \ nu_ {2}

and from the equation deduced from Bernoulli

\ rho_ {1} + \ frac {\ rho} {2} \ \ nu_ {1} {} ^ {2} = \ rho_ {2} \ \ frac {\ rho} {2} \ \ nu_ {2} {} 2

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the pressure and speed of a liquid in a conduction system are dependent on each other, of such that with the modification of one of the parameters, the other parameter also experiences a modification.

Moved to the spray device according to the invention, this means that the total pressure present in the inlet conduits of the ends (pressure static plus dynamic pressure (fluid velocity), which is generated for a corresponding pump job, in driving with the cutting surface A_ {1} is divided into low dynamic pressure and high static pressure and tubular conduction with openings corresponding spray and cutting surface essentially lower A 2, at relatively static pressure low, however, high fluid velocities (pressure dynamic).

This relationship is represented illustratively. according to Figure 1. Based on these physical relationships, the spray openings arranged in the tube section II, therefore, they do not act as an exit opening, since with a correspondingly high velocity v2, the pressure p2 It is so low that the liquid does not tend to leave the tube section II by the spray opening or the openings of spray.

Yes, then in accordance with this invention the velocity v2 decreases in the tube section II, pressure p_ {2} is generated corresponding to the equation of continuity and the parts of liquid submitted so corresponding to pressure tend to leave tube section II by spray openings. The direction of departure of the parties of liquid under pressure is essentially oriented according with the relations of v_ {1} and v_ {2} in the respective liquid sections, where, according to vector equations, You can determine the angle of departure.

With the spray device according with the invention they can be established, by way of example, by corresponding program developments, which are stored in the program control unit, spray patterns specific. As an example it is possible to generate a pattern of spray set according to Figure 2, if at both ends of the tubular conduction there are quantities of corresponding liquid with equal pressure values, of such so that approximately in the center of the tubular conduction, the velocity vectors of the liquid located in the tube are compensate for the value and there is only one pressure value corresponding, so that the jet of water that leaves the tubular conduction leaves the spray opening essentially at a right angle.

The spray angles of the jets of spray coming out of the respective ends of the tubular conduction, measured in the direction of flow each time are minor, since the respective vector components of the Liquid velocity has less and less influence. Starting from Figure 3 a spray pattern of this can be observed kind.

According to the invention, in the unit of control different pressure development programs are stored to enable, corresponding to the selection of washing programs, different spraying developments and spray patterns, by way of example, zone washing.

If applicable, by way of example, providing two pumps, which are both controlled by a control unit central, a development of pressure determined to the liquid, is possible according to the invention generate spray strokes by way of of momentum that are able to effectively remove even Resistant contamination of the product for washing.

The method according to the invention for the operation of a spray device according to the invention performs the following steps:

- Selection of a spray program stored in a program memory;

- Generation of the respective profiles of pressure corresponding to the wash program at the ends of the tubular conduction;

- Regulation of the respective profiles of pressure and the corresponding amounts of liquid.

The spraying device according to The invention has the following advantages:

The angle of departure and the site of maximum flow coming out of the openings of the individual jets of spraying can be precisely controlled by pressure and liquid velocity regulation, so that you can subject individual areas to washing liquid intensively (zone washing) with a specific spray pattern. He device according to the invention does not need any parts mobile, as, for example, rotating nozzle heads, of such that both manufacturing and assembly, with respect to conventional spray systems, are more economical or effective.

The invention is explained in more detail by The following drawings. It shows:

In Figure 1, a schematic representation of the physical relationships of the individual sections of tube;

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In Figure 2 A, B, a representation schematic of a spray device according to the invention in two different pressure stages;

In Figure 3, a preferred embodiment of the present invention, where the pressure control is carried out by rotating distributors

Figure 1 shows a cut representation schematic by a tubular conduit 1 of a device spraying according to the invention with the respective sections I, I *, II, III * and III, where the openings of Spray 2 are provided only in section II. The Sections I and III serve only for liquid transport 3, where the thickness of the arrows reproduces the respective state of static pressure and the length of the arrows, the vector of speed.

In section I, the liquid has a pressure relatively high, so that according to the equation of Bernoulli, the speed of liquid 3 is relatively low. He transition area I *, which corresponds to a regulation, causes a narrowing of the cross-sectional surface, of such so that in area II there is a relatively high speed, however, the liquid pressure is low. Through this state you get no liquid out of the openings of Spraying 2. After reaching tube section III by the regulation III *, the speed is reduced again in accordance with the Bernoulli equation and a higher pressure is generated in the liquid III.

Yes, as shown in Figure 2A, the tube 1 closes in area III, this leads to the speed in the final area of tube II falls, thus the pressure rises and the liquid comes out of the spray openings 2 of the tube. How I know represented in Figure 2B, by setting pressure of a second amount of liquid, this speed decrease can be provoke in each area of section II of tube 1, where the site of the decrease in speed can be regulated by means corresponding, by way of example, pumps.

According to Figure 2B, the two quantities of liquid 3 coincide approximately in the center of tube 1, of such that in this area you don't have to measure any speed of essential liquid, as a consequence increases the pressure of liquid and liquid leaves tube 1 through openings 2 corresponding. According to the respective vectors of speed or its steering components, the liquid or the parts of liquid flow corresponding to the distribution of speed with different angles through respective openings of spray 2.

A representation is shown in Figure 3 schematic of the spraying device according to the invention, where product is schematically represented for wash 7, which is wetted by jets of liquid (represented by arrows) The spray direction or spray pattern corresponding can be regulated, by way of example, by a rotary distributor 4, where the rotation speed of the rotating element influences the shape spray pattern correspondent.

Spray openings 2 of the device of spray according to the invention are configured in the exemplary embodiments explained as nozzle openings, however, alternatively they can also be configured as to minus a longitudinal groove.

In the spray device according with the invention explained above, in all realizations, exit angles and site of maximum flow coming out of the spray jet openings individual can be precisely controlled by pressure and liquid speed regulation, so that you can submit individual areas (zone washing) with a pattern of Specific spray intensively to washing liquid. He spray device according to the invention no you need no moving parts such as, for example, heads of rotating nozzle, so that both manufacturing and assembly are more economical or effective with respect to systems of conventional spraying

Spray devices according to the invention that have been explained above are operated with the method according to the invention for driving a device according to the invention of spraying the following mode:

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Selection of a program spray stored in a program memory;

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Generation of the respective profiles pressure corresponding to the washing program at the ends of tubular conduction and

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Regulation of the respective profiles of pressure and the corresponding amounts of liquid.

Claims (8)

1. Dishwasher comprising a spraying device, the spraying device consisting of at least one tubular conduit (1) having two ends (5, 6), where the two ends (5, 6) of the tubular conduit (1) they are connected with means, characterized in that the means are configured so that the liquid flows into the tubular conduit (1) with a pressure optionally determined by the first and / or second end (5, 6), where the tubular conduction (1) has spray openings (2), which are arranged longitudinally in the tubular conduit (1), through which the liquid for spraying comes out. 2. Dishwasher according to claim 1, characterized in that the means are two pumps that are connected to the ends (5, 6) of the tubular conduit (1). 3. Dishwasher according to claim 1, characterized in that the means are a pump and a control unit. 4. Dishwasher according to claim 3, characterized in that the control unit, by a rotating element, distributes the respective parts of liquid to the two ends (5, 6) of the tubular conduit (1). 5. Dishwasher according to claim 4, characterized in that the rotation element is configured as a rotary distributor (4) and can be influenced by the rotation speed in the spray behavior of the liquid. 6. Dishwasher according to claim 2, characterized in that both pumps are operated by a control unit per program. 7. Dishwasher according to claim 6, characterized in that specific program developments that generate a particular spray pattern are stored in the program control unit. 8. Method for driving a dishwasher according to one of claims 1 to 7, with the stages:

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Selection of a program spray stored in a program memory;

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Generation of the respective profiles pressure corresponding to the washing program at the ends of tubular conduction; Y

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Regulation of the respective profiles of pressure and the corresponding amounts of liquid.