WO2015185458A1

WO2015185458A1 - Household appliance comprising an outer tub

Info

Publication number: WO2015185458A1
Application number: PCT/EP2015/062014
Authority: WO
Inventors: Rodrigo FERRAZ MAINA
Original assignee: BSH Hausgeräte GmbH
Priority date: 2014-06-04
Filing date: 2015-05-29
Publication date: 2015-12-10
Also published as: CN106460297B; EP3152354A1; DE102014210624A1; PL3152354T3; EP3152354B1; CN106460297A

Abstract

The present invention relates to a household appliance (100) comprising a component (101) for carrying or accommodating washing lye (107), the component (101) having a coating (103) for reducing the surface energy of a contact surface (105) of the component (101) with the washing lye (107).

Description

Household appliance with a tub

The present invention relates to a household appliance with a component for guiding or receiving a wash liquor. In household appliances, such as washing machines, foam can arise. The foam during washing worsens the washing performance. When pumping

The foam can also cause a deterioration of the flushing performance. In addition, the foam can escape from the household appliance. A dense mixture of air and wash water also reduces the washing mechanics between the individual items of laundry. In the Sinner circle, which describes a washing performance, washing mechanics plays an important role alongside chemistry, time and temperature.

So far, procedural measures have been used to incurred

Remove foam during washing, spinning or pumping. These measures are often associated with an increased consumption of water and time, so that they are not beneficial to the environment or the customer.

The document DE 10 2009 027 933 A1 describes a method for detecting foam in a suds container filled with a wash liquor

program-controlled laundry treatment machine

The document EP 12 981 95 B1 describes a method for the semiautomatic

Dosage of washing and cleaning agents such as those for the

Dishwasher used in dishwashers.

The published patent application DE 10 2008 010 517 A1 shows a domestic appliance for drying laundry, which has a component that can be flowed around by process air. The component has a substrate made of metal or plastic, which has a surface facing the process air. This surface carries an adhesion of a foreign particle avoiding coating.

The published patent application DE 10 2007 036 007 A1 shows a dispenser for a washing machine and washing machine. The dispenser has a chamber, the surfaces of the bottom of the chamber being hydrophobic and the surfaces of the side walls of the chamber being hydrophilic. It is the object underlying the invention to provide a household appliance, in which a washing process can be performed more efficiently.

This object is achieved by the subject matter having the features of the independent claim. Advantageous embodiments of the invention are the subject of the figures, the description and the dependent claims.

According to one aspect of the invention, the object is achieved by a domestic appliance having a component for guiding or receiving a wash liquor, in which the component has a coating for reducing the surface energy of a contact surface of the component with the wash liquor. The coating is a foam inhibitor. As a result, the technical advantage is achieved, for example, that can be dispensed with soluble foam inhibitors in the wash and foam in the component can be resolved in a quick manner. The coating acts as a foam inhibitor, that is according to one embodiment

Foam inhibitor or includes, for example, such. The coating advantageously prevents foaming during its formation. The foam bubbles are successfully destroyed and / or minimized when the surface tension of an insoluble material of the coating which comes into contact with the foam is smaller than the surface tension of the foam itself. This means, for example, that the coating is preferably formed, foaming to prevent its formation. The coating is preferably designed to destroy foam bubbles and / or to reduce them. In one embodiment, the coating comprises an insoluble material whose surface tension is less than or equal to a predetermined one

Surface tension limit is. Preferably, the surface tension of the insoluble material is less than the surface tension of the foam. The predetermined surface tension limit depends in particular on the surface tension of the foam.

A foam inhibitor may preferably be referred to as a defoamer. This means, for example, that the coating is in particular a defoamer or comprises such. The coating according to one embodiment may comprise silicone oil (s) and / or polydimethylsiloxane as foam inhibitors.

The coating may preferably be arranged at any point of the component for receiving a wash liquor. If the coating is arranged, for example, at an exit point of the wash liquor, the formation of foam directly at the exit point can be prevented.

In one embodiment, the household appliance comprises a plurality of components, each of which is provided with a coating in the sense of the present invention. The respective

Coating of the components can for example be the same or preferably different.

A household appliance is a device that is used for household management. This may be a large household appliance, such as a washing machine, a tumble dryer, a dishwasher or a refrigerator, such as a refrigerator. a refrigerator, a freezer or a fridge-freezer. But that can also be one

Household small appliance, such as a water heater, a coffee machine or a food processor. The household appliance with a component for guiding or receiving a wash liquor is in one embodiment a washing machine. In the following, a washing machine is understood in particular to mean a household washing machine, that is to say one

Washing machine, which is used for household management in households, and in particular serves household laundry in a household amount or one

to treat household frequency. For example, this washing machine can also have a drying function. A washing machine with such an additional drying function is also called a washer-dryer.

In an advantageous embodiment of the household appliance, the coating comprises silicone. As a result, for example, the technical advantage is achieved that the

Surface energy can be reduced efficiently.

In a further advantageous embodiment of the household appliance, the coating is a silicone film. As a result, for example, the technical advantage is achieved that the

Coating can be produced with a low material usage. In a further advantageous embodiment of the household appliance includes the

Coating polydimethylsiloxane. As a result, for example, the technical advantage is achieved that the surface energy can be reduced efficiently. In a further advantageous embodiment of the household appliance includes the

Coating a hydrophobic material. As a result, for example, the technical advantage is achieved that the foam can be dissolved in a fast manner.

In a further advantageous embodiment of the household appliance, the coating is brushed or sprayed onto the component. As a result, for example, the technical advantage is achieved that the coating can be applied in a simple manner.

In a further advantageous embodiment of the household appliance, the coating is formed by a film which is adhered to the component. As a result, for example, the technical advantage is achieved that the coating can be mounted quickly.

In a further advantageous embodiment of the household appliance, the component is a tub for a washing drum. As a result, for example, the technical advantage is achieved that prevents the formation of foam inside the tub and a water consumption of the household appliance is reduced.

In a further advantageous embodiment of the household appliance, the coating is arranged on a side wall of the tub. As a result, for example, the technical advantage is achieved that the foam can be dissolved efficiently.

In a further advantageous embodiment of the household appliance, the coating is arranged in a horizontal strip on the inside of the tub. As a result, for example, the technical advantage is achieved that the foam can be dissolved at the level of a liquid level with a small amount of coating material.

In a further advantageous embodiment of the household appliance, the component is an induction bowl for introducing a washing substance. As a result, for example, the technical advantage is achieved that the formation of foam when flushing a

Washing substance is prevented. In a further advantageous embodiment of the household appliance, the coating is arranged in a trough of the dispenser tray. As a result, for example, the technical advantage is achieved that the entire surface of the tub acts foam-preventing. In a further advantageous embodiment of the household appliance, the coating is arranged in a pump chamber. As a result, for example, the technical advantage is achieved that a pump power can be increased.

In a further advantageous embodiment of the household appliance is the

Pump chamber completely lined with the coating. As a result, for example, the technical advantage is achieved that a formation of foam in the pump chamber is effectively suppressed.

In a further advantageous embodiment of the household appliance, the component is a vent hose, a supply air hose, a supply hose, a drain hose or a drain hose. As a result, the technical advantage is achieved, for example, that even at the inlet or outlet, a generation of foam is prevented.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Show it:

Fig. 1 is a schematic view of a household appliance; and

Fig. 2 is a schematic view of a tub, and

Fig. 3 is a cup without coating and a cup with coating. Fig. 1 shows a schematic view of a washer dryer representative of a general household appliance 100. The household appliance 100 comprises a door 109 for loading the household appliance 100 with laundry. The laundry will be inside the

Household appliance 100 washed and then dried. The household appliance 100 comprises a pull-out Einspülschale 1 1 1, in which different liquid substances are input, during the washing or drying process to the laundry be supplied. The dispenser 1 1 1 is for example a pull-out

Drawer-like plastic part with a sink.

Fig. 2 shows a schematic view of a tub as a component 101 to

Receiving a wash liquor 107. The tub has a coating 103 for reducing the surface energy of a contact surface 105 of the component 101 with the

Wash on. This coating 103 acts as a foam inhibitor. The coating 103 prevents the formation of foam during its formation. The foam bubbles are successfully destroyed when the surface tension of an insoluble material of the coating 103 which comes into contact with the foam is smaller than that

Surface tension of the foam itself is. The coating 103 may include silicone oils and polydimethylsiloxane as foam inhibitors.

The coating 103 can at any point of the component 101 for receiving a

Wash liquor 107 may be arranged. If the coating 103 is arranged, for example, at an exit point of the wash liquor, the formation of foam directly at the exit point can be prevented.

Fig. 3 shows a cup 1 13 without coating and a cup 1 15 with coating 103. In a comparative experiment, the two cups 1 13 and 1 15 are prepared with an equal detergent concentration so that upon vigorous shaking the same amount of foam 1 17 is formed. The inside of the cup 1 15 has been previously painted with silicone. The inside of the cup 1 13 is untreated.

In the cup 1 15 can be seen how the foam 1 17 at the contact surfaces with the

Coating loses stability and breaks down. After a short time, a ring is formed that allows the core to decay. As a result, the foam 1 17 decomposes completely after a short time. The advantage is that the foam 1 17 already at the

Formation is prevented from stabilizing. In a domestic appliance 100, the coating 103 may be arranged as a foam inhibitor, for example in a suds container. By arranging the coating 103 in the tub, generation of foam in the tub can be suppressed, so that operation of heating or water consumption can be reduced. In addition, individual program sections, such as increased rinsing, can be skipped. The coating 103 as a foam inhibitor can be arranged, for example, in the dispensing tray 103, a venting or inlet hose. Thereby, a foam leakage from the household appliance 100 can be prevented. The coating 103 as a foam inhibitor can be arranged, for example, in a pump chamber, a pump-down or drain hose. This will be a reduced

Prevents pumping, which can be caused by foam.

By the domestic appliance 100, a TCR ("Total Cost of Risk", in German:

Overall cost risk) quota be reduced by foam. Foam formation inside the household appliance 100 is reduced. Technical measures for

Foam detection can be reduced and the performance of the household appliance can be increased. In addition, leakage from the foam from the household appliance 100 can be prevented directly. All of the features explained and shown in connection with individual embodiments of the invention may be provided in different combinations in the article according to the invention in order to simultaneously realize their advantageous effects.

The scope of the present invention is given by the claims and is not limited by the features illustrated in the specification or shown in the figures.

LIST OF REFERENCE NUMBERS

100 home appliance

101 component

103 coating

105 contact surface

107 wash liquor

109 appliance door

111 induction bowl

113 cups

115 cups

117 foam

Claims

1. Household appliance (100) with a component (101) for guiding or receiving a wash liquor (107), characterized in that the component (101) has a coating (103) for reducing the surface energy of a contact surface (105) of the component (101) the wash liquor (107).

2. Household appliance (100) according to claim 1, characterized in that the

Coating (103) Silicone includes.

3. Household appliance (100) according to claim 2, characterized in that the

Coating (103) is a silicone film.

4. Household appliance (100) according to one of the preceding claims, characterized

in that the coating (103) comprises polydimethylsiloxane.

5. Household appliance (100) according to one of the preceding claims, characterized

in that the coating (103) comprises a hydrophobic material.

6. Household appliance (100) according to one of the preceding claims, characterized

in that the coating (103) is applied to the component (101).

7. Household appliance (100) according to one of the preceding claims, characterized

characterized in that the coating (103) is formed by a film which is glued to the component (101).

8. Household appliance (100) according to one of the preceding claims, characterized

characterized in that the component (101) is a tub for a washing drum.

9. Household appliance (100) according to claim 8, characterized in that the

Coating (101) is arranged on a side wall of the tub.

10. Household appliance (100) according to claim 8 or 9, characterized in that the coating (101) is arranged in a horizontal strip on the inside of the tub.

1 1. Household appliance (100) according to one of claims 1 to 7, characterized in that the component (101) is a Einspülschale (107) for entering a washing substance.

12. Household appliance (100) according to claim 1 1, characterized in that the

Coating (101) in a trough of the dispenser tray (107) is arranged.

13. Household appliance (100) according to one of claims 1 to 7, characterized in that the coating (101) is arranged in a pump chamber.

14. Household appliance (100) according to claim 13, characterized in that the

Pump chamber is completely lined with the coating (101).

15. Household appliance (100) according to one of claims 1 to 7, characterized in that the component (101) is a vent hose, a supply air hose, a supply hose is a Abpumpschlauch or a drain hose.