DE19844898A1 - Heating device for domestic appliances has contact element integrated into sump container of appliance - Google Patents

Abstract

The contact element (5) is integrated into the wall and/or the bottom of the container (3). The heating device comprises at least one electric heating element (6) and a contact element (5) which produces the thermal contact between the heating element (6) and the medium to be heated.

Description

The invention relates to a heating device according to the Preamble of claim 1.

In conventional dishwashers, when heating Partly used heating rods, which are in the interior of the Dishwasher. In extreme cases, this can even a fire from falling objects inside the dishwasher.

For this reason, one has gone over to instantaneous water heaters to use as heating. However, this has the disadvantage on that the heater for the water, d. H. the Instantaneous water heater, not for the drying process of the washed dishes can be used. This usually happens elaborate additional devices provided.

The object of the invention is therefore a heating device to propose, in which a melting or burning of falling objects is reliably avoided and the can also be used as dry heating.

This task is based on heaters type mentioned in the introduction by the marked features of claim 1 solved.  

By the measures mentioned in the subclaims advantageous embodiments and developments of the invention possible.

Accordingly, in an inventive Heater that has an electric heating element in Connection with a the thermal contact between the heating element and medium to be heated (e.g. water) Contact element works, the contact element in the wall and / or in the bottom of the sump container Integrated dishwasher.

On the one hand, this offers the advantage that Filter cover of the sump container is reliably avoided, that objects falling from above come into contact with the Heating element or the contact element can come. On the other hand is due to the direct thermal contact between the Contact element and the air in the interior of the dishwasher pumped empty, given the possibility of the same Heater the interior to dry the dishes to heat up.

In a particular embodiment of the invention, the Container wall and / or the container bottom at least partially formed by the heater. This has the advantage that heating elements attached to the outside of the contact elements are accessible without disassembling the sump container.

In an advantageous development of this embodiment the heating device or the contact element as Base plate trained. This has the advantage that for Facilitate the assembly of the heater, this with easy-to-use cross-section, for example with circular cross section can be provided.

In another particular embodiment, the Heater in the side wall of the sump container  integrated. This ensures that when pumped empty Dishwasher housing the heater or the contact surface is not wetted by residual water, making the final Drying process of the dishes is favored.

A is advantageously used for the assembly of the heating device Sealing element, for example an O-ring used as the Part of the container trained heater tightly with the connects the remaining part of the sump container. This Embodiment has the particular advantage that the Heater as removable and therefore interchangeable Part can be trained.

A favorable embodiment in terms of production technology also exists in it, the heater directly to the plastic to spray the sump container.

Another advantageous embodiment of the invention exists in it, in the manufacture of the sump container an electrical to use conductive plastic that immediately through Current is to be heated. Likewise, a heating device according to the invention by injecting Heating elements realized in a thermally conductive plastic become. Also an aluminum sump container with inclusion of heating elements, for example with the help of a Die casting process can be used as a heating device according to the invention Find use.

Depending on the embodiment of the invention, it is recommended that Filter that separates the sump container from the rest of the interior of the Dishwasher separates, from heat-resistant material, in particular to manufacture metal to damage the Avoid filters.

Preferably using an inventive Heater the water pump directly on the sump tank  connected. This gives you a smaller overall Size in the area of the base of the dishwasher.

In a further development of this embodiment, the Pump body molded directly onto the sump container. This can, for example, in the injection molding process in the case a plastic container or in the die casting process metal sump containers or pump bodies can be realized.

An embodiment of the invention is in the drawing shown and will be explained in more detail below with reference to the figures explained.

The single figure shows a schematic cross section of a Container bottom of a dishwasher with inventive Heater.

In detail, the figure shows a container bottom 1 with an end collar 2 , over which a sump container 3 is pushed. A seal 4 is inserted between the sump container 3 and the end collar 2 for the liquid-tight closure.

A contact element 5 with an outside heating element 6 is arranged on the bottom region of the sump container 3 . The contact element 5 is provided with an annular collar 7 , into which an annular groove 8 is incorporated for receiving a further sealing element 9 .

Liquid in the sump container 3 comes into direct contact with the contact element 5 via the corresponding circular opening 10 .

Above the sump container 3 , the interior 11 of the dishwasher is separated by a sieve 12 , which is made of heat-resistant material. In addition to the penetration of undesired dirt into the liquid circuit, this also prevents heat-sensitive objects from reaching the area of the contact element 5 .

With a heating device 13 according to the invention, on the one hand, the liquid of the liquid circuit, which is pumped out of the sump container 3 via a drain (not shown in more detail), can be brought to the desired temperature and, on the other hand, the final drying of the dishes by heating the interior 11 after removal of the Liquid are carried out.

Reference list

1

Tank bottom

2nd

Final covenant

3rd

Sump container

4th

poetry

5

Contact element

6

Heating element

7

Ring collar

8th

Ring groove

9

Sealing element

10th

opening

11

inner space

12th

scree

13

Heater

Claims (12)

1. Heating device for household machines with a sump container, in particular for dishwashers, which have at least an electric heating element and a thermal contact between the heating element and the medium to be produced contact element, characterized in that the contact element ( 5 ) in the wall and / or the bottom of the Sump container ( 3 ) is integrated. 2. Heating device according to claim 1, characterized in that the contact element ( 5 ) at least partially forms the container wall and / or the container bottom of the sump container ( 3 ). 3. Heating device according to one of the preceding claims, characterized in that the contact element is designed as a base plate ( 5 ) of the sump container ( 3 ). 4. Heating device according to claim 3, characterized in that the contact element forms a flat base plate ( 5 ). 5. Heater according to one of the preceding claims characterized in that the contact element of Heater on the side wall of the sump container is arranged. 6. Heating device according to one of the preceding claims, characterized in that the contact element ( 5 ) with the aid of a sealing element ( 9 ) on the sump container ( 3 ) is sealed. 7. Device according to one of the preceding claims, characterized in that the contact element ( 5 ) is injection molded onto the sump container ( 3 ). 8. Device according to one of the preceding claims characterized in that the sump container at least partially made of electrically conductive and / or thermally conductive Plastic is made. 9. Heating device according to one of the preceding claims characterized in that the sump container as a metallic Die-cast part formed with the inclusion of a heating element is. 10. Heating device according to one of the preceding claims, characterized in that a heat-resistant filter ( 12 ) for separating the dishwasher interior ( 11 ) and the sump container ( 3 ) is provided. 11. Heating device according to one of the preceding claims, characterized in that a pump is connected directly to the sump container ( 3 ). 12. Heating device according to one of the preceding claims, characterized in that the pump body is integrally formed on the sump container ( 3 ).