DE1991525U - Device for controlling the liquid level in the tub of a washing machine or dishwasher - Google Patents

Description

W13423-21.6.

SIElEIS-ElEGIROGEEliEE GlBH Berlin and monks

PVA 66/5106

Kausgcraiswerk "

9. EET. 1966

Note: This interfqgs $ Iescfireif> ung and ScriufeonsprJ Isf "the submitted forTefzf; it differs from the two wording of the originally submitted documents. . The Untarlagan originally submitted is in, .fen Arrk :: kt,; rs. Sie ϋύη - ^, ί |. -F. » ?. ~ t oiV! «Noi.w! f of a legal interest free of charge. Upon request, foiokspifsn ocW flun · negatives were also supplied at (at usual prices. Deutsches Pcrientamt, utility model office.

Torriolitung to control the liquid level in the LaugenlD can be found in a washing machine or dishwasher

the control of washing machines or dishwashers mostly program control devices are used, through which a time-dependent switching of the power consumers of the machine accordingly the respective operating phases is effected · In addition, individual Operating sections also depending on certain operating conditions, such as, for example, the temperature, the caustic level or the like "controlled"

®re /

With the known washing machines: .is ^ t, it iffls generally i the for. Pumping out the. The drain pump that serves the liquid can be switched on and off depending on the time of the program control device. Of course, a time reserve must be provided so that the tub is also emptied with certainty runs idle, whereby the. read program is extended accordingly » - '■ _ \ ;

It is well known, the pumping process zustandsabhangig monitor "In one known machine dicßer type is determined the end of the pumping-out by a dependent on the liquid level pressure switch, the measuring chamber is diverted before a choke point of a measuring line, a" zero level ^11, d »H" connects the connection point that determines the emptiness of the tub with a connection point located in the suction line of the drain pump. Such a control of the drain pump, which is dependent on the liquid level, can reduce the program duration needs to be temporally monitored »

However, the known arrangement is disadvantageous in that the only pressure switch in its switch-on position is a maximum Liquid level is assigned, while its switch-off position must correspond to the empty tub. A. such Pressure monitor, which is only when the tub is empty

switches back, after the required liquid level has been reached, the inlet valve can only be opened once in the sense of To close. On the other hand, it is not able to withstand one - for example due to the absorbency of the dry laundry Due to the lowering of the liquid level, a certain amount of water can be made up by opening the inlet valve again is opened for a certain period of time. In addition, the well-known Device the presence of two drainage openings Requirement in the bottom of the suds container ο

Hiring /

The IxöÄffiS relates to a device for controlling the liquid level in the! suds container of a washing machine or dishwasher, in which also the drain pump effecting the pumping out through the switch monitoring the liquid level is switched off, the hot line for the liquid level in the tub to a point of the liquid drain is connected, which allows the '' zero level ", i.e. the emptiness of the tub, to be determined and aims to get by with only one drain opening in the bottom of the tub! without the person buying; Drain pump caused Suction can have a falsifying effect on the measurement result »

Innovation For this purpose, according to the BMlMiMg: the cross-section of the before the drain pipe lying in the area of the connection point the measuring line expanded. In this way, according to the continuity equation in the extended range, the flow velocity becomes decreased and thus increased the pressure according to Bernoulli's law. Of course, this only applies in the case of flow,

i.e. when the drain pump is switched on. In normal operation the washing machine or dishwasher, e.g. "during the washing process, if the drain pump is not punctured and · öd, purely static ones apply Conditions to which the measuring line and the measuring device itself must be matched. If the pump is now switched on, so occurs on the suction side of the pump, i.e. in the main Part of the drainage line caused a considerable amount by the pump suction Pressure reduction, which results in insufficient fluid renewal

was pretending to be in the suds container. By the SXXXKSHKgS according to c Extension of the drainage line in the area of the connection point the measuring line causes a pressure increase that just eliminates this pressure decrease, so that an incorrect measurement is prevented will. The dimensioning of the cross-sectional expansion must be matched to the pump used in accordance with what has been stated previously.

innovation
In the embodiment of EM3ö £ äl & §, the extended area of the drainage line can also be used as an extraction point for a filter device to be arranged in front of the drain pump, which is often referred to as a clamp trap. Such an access opening in the area of the measuring line also gives the opportunity to occasionally remove any incrustations or the like from the connection point. to be able to clean.

The type of liquid level measuring device used is new

Dear, it has no influence on the subject of the SEXXSBSXg. ■ 'Thought of innovation

It should also be noted that the, 3ffi £ XMSXp £ JPl! & 3Si3 ^ in others Liquid containers applied v / can ground, in which the measuring line should be connected to a drainage line in which

a feed pump or another causing a stronger flow Drain device is arranged »

The drawing shows an exemplary embodiment of the invention shown using a drum washing machine «

The tub 10 with the drum 11 arranged therein has at its bottom 12 a drain opening 14 provided with a sieve 13 on which the drain line 16 leading to the caustic pump 15 connected. The drain pump is controlled by one with it connected electric motor 17 driven on the pressure port of the drain pump located behind the pump housing in the figure a hose 18 is connected, with the help of which the liquid from the tub 10 also into a higher one Drain 19 can be pumped »

In the area of the measuring line 21, which leads to the air chamber 22, is the drain line 16 with a considerably widened area 23 provided, which at the same time serves as a withdrawal point for the in the drainage line The clamp trap 24 inserted in front of the drain pump is used. The deekel 25 used to open this area is dashed drawn. From the air chamber 22 a pressure line 26 leads to a membrane 27, which acts on switches 28, of which In the figure, only a Sehalter with its contacts 29 is shown is.

Claims (2)

PA-B013423'21.6.68 n protection claims 1. Device for controlling the liquid level in the tub a washing machine or dishwasher, "in which the drain pump effecting the pumping out is carried out by the or the Liquid level monitoring switch is switched off, the measuring line for the liquid level in the tub is connected to a point of the liquid drain that determines the "Uull level", i.e. that the tub is empty allowed, thereby ^ gek ^ rmZe ^ iclme ^ t that the cross-section the drain line (16) in front of the drain pump (15) in the area the connecting tunnel of the measuring line (21) is widened. 2. Device according to claim 1, characterized in that the expanded area (23) of the drain line (16) as SSntnahmdstollo for a filter device (clamp trap) (24) arranged in front of the drain pump (15) is formed lot ... ^: :. ;