RU2414553C2 - Method to charge detergent and machine for method realisation - Google Patents

Abstract

FIELD: textile, paper.

SUBSTANCE: rotary washing drum (4) is installed on at least approximately horizontal axis (14) in tank (3) for alkaline solution. Mixture of washing agent and liquid by jet (12) is sent to rotary shell (13) of drum so that jet (12) at small angle meets area (15) of drum shell (13) arranged in upper quarter of drum cylinder. Washing drum (4) is put in motion in preferable direction (8) of rotation so that drum shell (13) moves towards falling jet.

EFFECT: reduced consumption of energy and detergent in washing machines with programmable control.

8 cl, 2 dwg

Description

Technical field

The invention relates to a method for loading detergent into a programmable washing machine in the form of a mixture of detergent and liquid flowing through a predominantly cylindrical and provided with holes in the shell of a rotating washing drum mounted on at least approximately horizontal axis in the tank for washing solution.

State of the art

This method follows from DE 4342627 C2 or DE 4342626 C2. It is carried out using a washing machine having a detergent supply device with an adjustable flow rate of the loaded detergent and a detergent supply tube, as well as a drive motor of the washing drum with an adjustable direction of rotation. The term "detergent" hereinafter is used simplistically to refer to all types of detergents, care products and washing products commonly used in washing machines.

In the type of washing machines discussed, the detergent needed for a given washing program is placed in the drawer of the detergent dispenser. For the collection of various types and volumes of detergents, the drawer in most cases has several chambers, which are washed with an adjustable stream of water during certain phases of the washing program. Through the feed tube, a mixture of water and detergent flows into the washing solution tank. After washing, the washing solution is pumped out. To do this, at the deepest point of the tank for washing solution, an outlet is provided with a fitting for connecting the evacuation pipe.

Manufacturers of washing machines strive to use the detergent used in the washing process as efficiently as possible and to avoid losses. Losses, for example, may be due to the fact that undissolved detergent enters the pumping tank of the washing solution, no longer dissolves and is not involved in the washing process.

To prevent such losses of detergent in the known washing machines, systems are used to pump the detergent back into the washing solution tank (for example, DE 3704079 A1 and DE 3540741 A1). Using a circulation pump, the free washing solution is pumped through the pumping line at the deepest point of the washing solution tank and transported to the top of the washing solution tank. Thus, the cycle of the washing solution occurs, the detergent dissolves due to the constant movement in the solution.

Another way to prevent detergent loss is to drastically reduce the amount of detergent that is not involved in the washing process. In various embodiments, solutions are proposed according to which the evacuation pipe leading to the evacuation or circulation pump is closed during washing. The locking mechanism prevents the deposition of undissolved detergent in the outlet fitting and its loss for the washing process.

An example of such a solution is DE 10065404 A1. It proposes to close the opening of the exhaust pipe with a float, which is pressed by a cylindrical protrusion into the outlet of the washing solution tank. To improve the tightness of the float is covered with rubber or elastic plastic. The buoyancy of the float is provided by the water column contained in the drain tank. In the upper part of the washing machine there is a drain tank in which there is a water column exceeding the level of the freshly filled washing solution, that is, having a sufficient height for the development of the pressing force on the float. The used washing solution is pumped out through the drain tank from the washing solution tank.

Both of the solutions described have a common disadvantage in that, to prevent or reduce detergent losses, washing machines are equipped with expensive additional devices. Such additional devices significantly increase the cost of such washing machines. An additional disadvantage of the first method related to pumping is that during operation of the washing machine additional energy is consumed.

SUMMARY OF THE INVENTION

The objective of the invention is to develop a method of reducing losses of detergent, which could be implemented with minimal material costs and would not require the consumption of additional energy during operation of the washing machine.

According to the invention, the problem is solved by the features disclosed in the restrictive part of paragraph 1 of the claims. In addition, in paragraph 6 of the formula discloses a washing machine for implementing the method that solves this problem. Other advantageous embodiments of the invention are disclosed by the dependent claims, their features can be used individually, or in any combination with each other, or with the features of paragraphs 1 or 6.

According to the invention, when the washing drum is driven in the preferred direction of rotation, the detergent and liquid mixture is sprayed onto the moving shell of the drum so that the jet at a small angle meets the area of the drum shell located in the upper quarter of its cylinder. The drum moves in a preferred direction of rotation towards the direction of the jet of the introduced mixture of water and detergent. In addition, it is preferable that the downward flowing mixture of liquid and detergent is kept away from the outlet as long as possible.

It is found that this simple measure can significantly improve the dissolution of the detergent at no additional cost. A particularly good effect can be achieved by the method in which the surface of the washing drum is a turbulence enhancing surface, in particular a structured surface of the drum. As a result, the mixture of detergent and water with the rotating drum can be held for a long time in the upper region, that is, away from the outlet.

The method can be implemented with minimal cost, because in general it differs in a purely software solution. To implement the method in practice does not require additional nodes or parts. The method can be used in washing machines in which a mixture of detergent and liquid is directed off-center from the top of the drum by reprogramming or replacing a software module.

In an embodiment of the invention, the mixture of detergent and liquid is sprayed onto the drum shell at approximately the entire depth of the drum. The incoming fluid flows more uniformly through the drum shell, which helps dissolve the detergent. The uniform distribution also contributes to the fact that already during the supply of the mixture a larger volume of the mixture can enter the inner part of the drum through the holes in the shell of the drum. Thus, the wetting of erased items is accelerated. The wetting of the clothes to be washed can be further improved due to the fact that the holes in the shell of the drum in the preferred direction of rotation have a higher throughput.

The volume of liquid entering the erasable items through the holes in the shell of the drum in the supply phase can be controlled - within certain limits - by adjusting the speed of rotation of the drum. Thus, the method described by the invention provides an additional opportunity to create a washing program.

Brief Description of the Drawings

The method according to the invention and the embodiments are explained in detail in the drawings below.

The drawings show:

figure 1 is a perspective view of a washing machine;

figure 2 is a detailed view of the upper region of the shirt of the drum.

The implementation of the invention

Figure 1 presents a perspective view of the washing machine in front. In the drawing in a simplified form only nodes are shown that are relevant for the implementation of the method according to the invention.

The washing solution tank 3 and the washing drum 4 rotating inside of it around a horizontal axis 14 have a loading opening closed by a door not shown here. In the upper part of the housing next to the control panel 1 is a detergent supply device. In its retractable container 2, sliding forward in a horizontal plane, the necessary detergents are placed. For the collection of various detergents, the retractable container 2 is divided into several chambers, which under the control of the program can be washed with clean water coming from an external water supply system.

The bottom of the dispenser ends with an outlet for the detergent supply tube 7. In the drawing, the flow direction of the detergent-liquid mixture is indicated by arrow 6. To pump the washing solution at the deepest point of the washing solution tank 3, an outlet 10 is provided that is connected by a connected tube to the washing solution supply pump 11. A device 5 for distributing liquid, mounted on the tank 3 for washing solution parallel to the axis of rotation of the drum 14, but not aligned therewith, and a number of through holes distribute the mixture of detergent and liquid throughout the entire width of the shell 13 of the drum (figure 2). On both edges facing the rear wall and the front side, the drum shell has annular sides (not shown), due to the manufacturing technology and preventing leakage of the detergent and liquid mixture on the sides. The liquid jet 12 falls from above at a small angle α onto the surface of the shell 13 of the washing drum 4. The shell 13 of the drum, due to the preferred direction of rotation 8 of the washing drum 4, moves towards the direction of flow 12 of the incoming mixture of detergent and liquid. A mixture of detergent and liquid is introduced into the area of the washing solution tank within the upper quarter of the drum cylinder. This design feature, as well as the direction of flow towards the direction of movement of the shell of the drum, due to the rotation of the drum, and the distance from the outlet favor the dissolution of the detergent.

In an embodiment, the through holes 9 of the shell 13 of the drum are formed by fan-shaped cutting in the form of halves of the cone (see figure 2). On the one hand, this form provides a delay in the runoff of a mixture of detergent and liquid from the shell 13 of the drum. On the other hand, through the openings 9 thus formed, in the rotation direction 8 of the drum 4, the liquid is intensely directed to the inside of the drum. Wetting erased items is accelerated. Other forms of cutting in the shell 13 of the drum, added as necessary, especially those that provide a strong swirl of the flow of the mixture of detergent and liquid, can support the length of time the mixture stays on the shell 13 of the drum and entering the washing drum 4 and promote high-quality and timely dissolution of the detergent until after the mixture reaches the bottom of the washing solution tank and the outlet.

Claims (8)

1. The method of loading detergent into a programmed washing machine in the form of a mixture of detergent and liquid flowing through a predominantly cylindrical and provided with holes (9) casing (13) of a rotating washing drum (4) mounted on at least approximately horizontal axis (14 ) in the tank (3) for an alkaline solution, characterized in that the mixture of detergent and liquid enters a stream (12) onto the rotating shell of the drum (13) in such a way that the stream (12) at a small angle (a) enters region (15) ) shells (13) a drum located in the upper quarter of the cylinder of the drum, and the washing drum (4) is thereby driven in the preferred direction of rotation (8), so that the shell (13) of the drum moves towards the incident jet (12). 2. The method according to claim 1, characterized in that the preferred direction of rotation (8) directs the falling mixture of detergent and liquid from the outlet (10) in the tank (3) for (8) the solution. 3. The method according to claim 1, characterized in that the mixture of detergent and liquid with the preferred direction of rotation (8) penetrates faster through the holes (9) in the washing drum (4) or more effectively seeps through the holes (9) compared to the direction of rotation opposite to the preferred direction of rotation (8). 4. The method according to claim 1, characterized in that the mixture of detergent and liquid is distributed over the entire width of the shell (13) of the drum - in accordance with the depth of the washing drum (4) - and enters the tank (3) for the washing solution. 5. The method according to claim 1, characterized in that the rotation speed of the washing drum (4) is adjusted during movement in the preferred direction (8) of rotation. 6. A washing machine for implementing the method according to one of the preceding paragraphs with a detergent supply device (2) with an adjustable flow rate of the detergent loaded into it and a detergent supply tube (7), as well as a drive motor for the washing drum (4) with an adjustable direction rotation, characterized in that the tube (7) for supplying detergent ends in the area (15) of the tank (3) for the washing solution and is oriented in such a way that the jet (12) of the mixture of detergent and liquid at a small angle that flows from it (a) enters the drum casing (13), and the washing drum (4) is set in motion in the preferred direction of rotation (8) when the detergent / liquid mixture is supplied, in which the drum casing (13) moves towards the incident jet (12) . 7. A washing machine according to claim 6, characterized in that the washing drum (4) has holes (9) in the shell of the drum (13) having a throughput or scooping effect, which when the washing drum (4) rotates in the preferred direction (8 ) rotations exceed the same characteristics for the opposite direction of rotation. 8. The washing machine according to claim 7, characterized in that the shell (13) of the drum, in addition to the holes (9), has structures (16) that slow down the smooth swelling of the detergent and liquid mixture.

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