DE3002625A1 - DEVICE FOR LEVELING FRONT DISHWASHER DISHWASHER - Google Patents

Description

EBHZ-79/74 January 24, 1980

Ul / vl

Licentia

Patent-Verwaltungs-GmbH

Frankfurt / Main

Device for level control of front-loading dishwashers

The invention relates to a device for level control according to the preamble of the patent claim.

In a known device of this type (DE-OS 26 24 219) are the connections of the air trap chamber for the hose lines of the level switch at the height of the chamber cover, so that the connection nozzle openings are below the liquid level of the washing compartment.

The invention is based on the object of providing a device for level control of the type mentioned at the beginning train that when leaking or when loosening the

130031/0265

EBHZ-79/74 January 24, 1980

Ul / vl

The level switch hose lines do not allow water to run out of the dishwasher from the connection pieces of the chamber can.

The solution to this problem according to the invention is the characteristic of the claim.

The inventive design of the chamber with the The connection piece ensures that neither the level switch hoses leak nor when they are pulled off these hoses from the connecting pieces of the air trap chambers Water can leak out of the machine. It is also guaranteed that in the event of a leak Hose of the normal level switch in the event of a safety, e.g. if the inlet valve does not close as programmed, the safety level switch responds and the drain pump switches on without going through the connection port opening the chamber for the normal level switch for water can emerge. In the event of a leaky connection between the second connection piece and the safety level switch no water escapes either, as the water level in the wash basin is monitored by the normal level switch is under the connection opening of the connection piece for the safety level switch =

The invention is explained in more detail with reference to the drawing, one of which is attached to the washing container of the dishwasher Connected air traps for the normal and safety level switch forming chamber in section shown.

130031/0265

BATH ORIGINAL

EBH2-79 / 74 January 24, 1980

Ul / vl

The level control device has a connected to the not shown container of a dishwasher Secondary line 1 or the like, in which a partition is arranged, the overflow edge 3 of which is at the level of the normal level 4 (normal filling level with the circulation pump switched off) of the container. One of the partition wall nachgeördneter Overflow channel 5 opens into a chamber 6 with a small volume compared to the container filling quantity.

The chamber 6 is divided into two air traps 8, 9 by an intermediate wall 7 ending at a distance above the chamber floor for a level switch or a safety level switch. One of the air trap 8 is one Connection piece 10 molded onto the chamber 6 above the safety level 11 (filling level of the washing compartment at which the safety level switch responds and the drain pump switches on) pulled up so that its connection opening 12 for a hose leading to the normal level switch a safety distance b over the security level 11 is located. Another of the second air trap 9 is molded onto the chamber 6 Connection piece 13 pulled up above the normal level 4, so that its connection opening 14 for the Safety level switch hose on the one hand below the connection port opening 12 for the normal level switch hose and on the other hand is a safety distance a above normal level 4.

When the loading door is closed, the dishwasher will open switched on, water first runs into the rinsing tank when the circulation pump is not running. Achieved the water level in the rinsing container is normal level 4,

130031/0265

EBHZ-79/74 January 24, 1980

Ul / vl

so water runs through the one communicating pipe to the Rinsing container forming secondary line 1 and over the overflow edge 3 of the partition 2 into the chamber 6 low chamber volume is a water level in a very short time reached in the chamber area of the air trap 8, which is the switching value of the pressure switch for the normal level 4 corresponds. The normal level switch closes the inlet valve and the circulation pump can start whereby the water level in the rinsing container is lowered below the normal level. The water level in the overflow channel 5 or in the chamber 6 remains in the area between the switching values of the normal level switch, if the inlet valve and this pressure switch are working properly.

If the emergency occurs and water continues to run in the rinsing container, e.g. because of a leaky valve to, the water level in the rinsing tank rises and finally reaches it again even when the circulation pump is running the overflow edge 3. The into the overflow channel 5 Overflowing water reaches the switching value of the safety level switch, which now switches on the drain pump. This lowers the level in the washing compartment and in its secondary line 1. By one off the floor The suction lifter line 15, which is routed to the evacuation system of the evacuation pump, is connected to the chamber 6 when the evacuation pump is running the level in the overflow channel 5 is reduced until the safety level switch switches back and the drain pump switches off. Will the If the damage is not repaired, the level in the washing container rises again until the safety level switch activates the The drain pump switches on again.

130031/02 Si

EBHZ-79/74 January 24, 1980

Ul / vl

The connection openings of the connection pieces of the level switch molded onto the chamber 6 are so high above the normal or safety level of the rinsing container so that no water can leak. Because of the higher arrangement of the connection opening for the level switch it is ensured that in the event of a leaky normal level switch hose connection, the safety level switch remains functional without leaving the connecting piece opening 12 for the normal level switch, water can escape.

130031/0265

Claims (1)

EBHZ-79/74 - ^: "'- * - - -,""-" 01/24/1980 Ul / vl claim Device for level control of front-side loading Dishwashers, with a partition between the rinsing container and a small volume chamber, which is an air trap for normal and safety levels set level switch connected to the chamber, whereby the partition wall a® in the filling level of the washing compartment running over 1 leading edge and the rinsing container has a washing container rim in the loading door area lying above the filling level, characterized in that that the chamber (6) forming the air trap is divided by a partition (7) ending slightly above the chamber floor is and separate air traps (8, 9) for the level switch forms that of the one air trap (8) a connection piece (10) for the normal level switch is formed on the chamber, the connection opening (12) for a The level switch hose is higher than the safety level (11) of the flushing device so that the second air trap (9) a connection piece (13) for the safety level switch is molded onto the chamber, the connection opening (14) of which higher than the normal level (4) of the dishwasher, and that the separate air chambers (8, 9) by a common overflow channel (5) over the overflow edge (3) and a secondary line (1) with the rinsing container and through a common siphon line (15) from the floor the chamber (6) are connected to the evacuation system of the evacuation pump. 13003 1/026