DE19752296A1 - Washing machine drum - Google Patents

Abstract

The supply and the discharge of the drain pump (8) are connected to each other via a bypass duct (19). The discharge system consists of an outflow opening connected to discharge bellows (14), a drain pump (8) and a drain tube (16).

Description

The invention relates to a drum washing machine according to the preamble of claim 1.

Drum washing machines of the type in question are common my known. In such washing machines, a in their drain system arranged drain pump Alkali or the rinse water from the suds container over a drain connected to the discharge port of the pump hose into the in-house sewage network. By Foam formation in the wash cycle or in the spin cycles now significantly affects the delivery rate of the pump. Such an impairment occurs primarily with one gushing water foam mixture arriving, which u. a. bring about a complete interruption of the pumping process can. Especially with drain pumps with synchronous motor and symmetrical pump outlet to the pressure connection result also relatively long venting times for the pump chamber. Then during this phase will not pumped out fast enough and it can therefore be too short spinning.

The invention is based on this prior art based on the task, the venting times for the drain to shorten the pump and the delivery rate of this ins improve overall and a trouble-free pumping process ensure even in the presence of foam.

The solution to this problem according to the invention is known drawing part of claim 1.

Advantageous further refinements of the subject of Invention are specified in the subclaims.

The proposed measure ensures that the Drain pump, d. H. the pump impeller in the pumps chamber above the suction port always a certain part amount is supplied, which only a negligible ba contains air. In this way it is secured represents that the pump impeller practically hardly be with air is opened and therefore the flow of the pump can't tear off.

An embodiment of the invention is in the drawing is shown and is based on this in more detail below wrote.

The drawing shows a drum washing machine that can be loaded with the forehead Schine in a simplified schematic sectional view.  

In the washing machine 1 according to the drawing, a rotatable washing drum 2 is accommodated in a tub 2 . The tub 2 is spring-mounted in a housing 4 in a manner known per se. The housing 4 has a front control panel 5 and a loading opening 6 . The loading opening 6 can be closed tightly by a pivotably mounted, pot-like porthole door glass 7 . Furthermore, this washing machine includes a drain pump 8 for the tub 2 and a drive motor 9 for driving the washing tub 3 stored horizontally in the tub 2, as well as a fresh water inlet 10 and an associated water distributor 11 (water switch).

The drain pump 8 has an intake pipe socket 12 and a pressure pipe socket 13. On the intake pipe socket 12 , a discharge bellows 14 is attached through which a flow connection to the bottom tub drain opening 15 is provided. On the pressure pipe socket 13 of the drain pump 8 , a drain hose 16 is coupled, which contains an equalization vessel 18 and is guided to a connection 17 located outside the housing 4 .

The inlet and outlet system of the drain pump 8 , which consists of the bellows 14 and the drain hose 16 be, is advantageously connected by a bypass line 19 miteinan, which is connected on the one hand to the drain bellows 14 and on the other hand to the drain hose 16 . The bypass line 19 is integrated into the connection geometry of the discharge hose 16 and into the inlet geometry of the discharge bellows 14 in such a way that about 10 to 30%, preferably 20 to 25% of the volume flow (delivery flow) conveyed by the discharge pump 8 is discharged via this bypass line becomes. It is useful that the connection 20 of the bypass line 19 on the drain hose 16 is approximately between 30 to 150 mm, preferably about 70 mm from the pressure pipe nozzle outlet 21 of the drain pump 8 , ie after its connection bend 24 of the drain hose 16 is made. The bypass line connection 22 on the discharge bellows 14 should lie at an angle 23 of approximately 30 to 60 degrees, preferably at an angle of 45 degrees based on the end edges 25 of the discharge bellows 14 , so that the bypass line 19 on the discharge bellows 14 in one certain inclination is appropriate.

Claims (5)

1. Drum washing machine, the laundry drum is arranged genbottich rotatably in a Lau, there is a genbottich connected to the Lau execution system, consisting of a lye container spout opening, a connected thereto Ablaufbalg, an emptying pump and attached to the Laugenpumpen- inlet connector evacuation tube, characterized that the inlet and outlet of the drain pump ( 8 ) are connected to one another by a bypass line ( 19 ). 2. drum washing machine according to claim 1, characterized in that the bypass line ( 19 ) on the one hand at the outlet bellows ( 14 ) and on the other hand on the drain hose ( 16 ) is closed. 3. drum washing machine according to claim 1 or 2, characterized in that the connection ( 20 ) of the bypass line ( 19 ) on the drain hose ( 16 ) at a certain distance from the pressure pipe outlet ( 21 ) of the drain pump ( 8 ) is made. 4. drum washing machine according to claim 3, characterized in that the connection ( 20 ) of the bypass line ( 19 ) on the emptying hose ( 16 ) after its pressure pipe connection elbow ( 24 ) is placed. 5. drum washing machine according to claim 1 or 2, characterized in that the bypass line ( 19 ) on the bellows ( 14 ) is attached in an inclined position.