DE3628595A1

DE3628595A1 - Heat recovery and water-quantity reduction for a washing programme in a washing machine

Info

Publication number: DE3628595A1
Application number: DE19863628595
Authority: DE
Inventors: Sigismund Laskowski
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-08-22
Filing date: 1986-08-22
Publication date: 1987-05-14
Also published as: JPS63125294A

Abstract

The used heated lye is stored by mounting a store (3) on the side of the tub (2). The clean-flowing water is guided up to the inner wall of the tub by means of the water-supply nozzle (8), so that the water, while it flows down, is heated. After the water-supply operation has been concluded, the cooled lye is discharged into the drainage system from the store (3) by means of a lye pump (4). The following economical benefits arise as a result of this operation: 1. The water is heated only by the amount of the difference between the desired temperature (for example, 95 DEG C) and the temperature of approximately 50 DEG C already reached in this case, thus leading to an energy saving of approximately 20%. 2. Moreover, the water consumption is reduced by approximately 25%, since there is no need for the laundry to be cooled after the main washing operation. Because the water required for the first rinsing operation is heated to approximately 50 DEG C in relation to the above case (95 DEG C), on the one hand the creasing of the laundry is sufficiently reduced, but on the other hand a thorough rinsing operation in the already heated rinsing water also becomes possible. Since the second rinsing operation also takes place at an increased temperature (approximately 25 DEG C), it is possible to save one rinsing operation. 3. This invention appears to be environmentally friendly to an appreciable degree, since the lye is conveyed into the drainage system only in the cooled state and, at the same time, the quantity of waste water is significantly reduced. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Waschvollautomaten, der entscheidend zur Reduzierung des Wasser- und Energiebedarfs beiträgt, ohne größere Konstruktionsänderung und größeren, fiananziellen Aufwand.The invention relates to a fully automatic washing machine, the key to reducing water and energy requirements contributes without major design changes and greater financial expenditure.

Wie aus dem Stand der Technik bekannt, wird nach jedem Waschvorgang das in dem Waschvollautomaten vorhandene Wasser in die Kanalisation gepumpt. Bei jedem dieser Vorgänge wird das Leitungswasser bis auf die benötigte Temperatur erhitzt. Um die Wäsche stufenweise abzukühlen (Vermeidung von Knitterbildung) wird mehrere Male Frischwasser direkt in die heiße Lauge eingepumpt und danach wieder abgelassen, wodurch ein Teil des Wassers, ohne direkt in den Reinigungsprozeß einbezogen zu sein, verbraucht wird.As is known from the prior art, after each washing process the water in the washing machine the sewage pumped. With each of these processes, it will Tap water heated up to the required temperature. Around gradually cool the laundry (avoid creasing) fresh water is directly into the hot water several times Lye pumped in and then drained again, creating a Part of the water without being directly involved in the cleaning process to be consumed.

Um diesen Nachteilen (hoher Wasser- und Energiebedarf) entgegenzuwirken, sind erfindungsgemäß folgende Änderungen notwendig:To counteract these disadvantages (high water and energy requirements) the following changes are necessary according to the invention:

Außen am Laugenbehälter wird eine zusätzliche Konstruktion so angebracht, daß sie mindestens die Menge Wasser, die im Laugenbehälter vorhanden ist, aufnehmen und speichern kann, um so das frisch einfließende Wasser in dem Laugenbehälter vorzuwärmen. Diese Konstruktion muß so beschaffen sein, daß sie aus schlecht wärmeleitendem Material hergestellt wird, um einen größtmöglichen Wärmeübergang in das Innere des Laugenbehälters zu gewährleisten.An additional construction is made on the outside of the tub attached at least the amount of water in the tub is available, can record and save so that preheat freshly flowing water in the tub. This construction must be such that it is made of bad thermally conductive material is made to the greatest possible To ensure heat transfer into the interior of the tub.

Eine weitere Änderung betrifft den Wasseraustritt im Laugenbehälter:Another change concerns the water outlet in the tub:

Der Wasseraustritt wird so umgeformt, daß eine relativ dünne Wasserschicht am Innern der von außen erwärmten Laugenbehälterwand herunterläuft.The water outlet is shaped so that a relatively thin Water layer on the inside of the heated tub wall from the outside runs down.

Außerdem wird die Steuerung der Laugenpumpe dahingehend geändert, daß das verbrauchte, erwärmte Wasser aus dem Laugenbehälter in die Konstruktion gepumpt wird und nach abgeschlossener Wärmeabgabe an das in den Laugenbehälter fließende Leitungswasser in die Kanalisation abgegeben wird. Aus diesen Konstruktionsänderungen ergeben sich folgende Vorteile:In addition, the control of the drain pump is changed so that that the used, heated water from the tub in the construction is pumped and after heat has been given off to the tap water flowing into the tub the sewer is released. From these design changes The following advantages result:

- Reduzierung des Wasserbedarfs.
Bisher wurden zur Vermeidung von Knitterbildung ca. 15 Liter Leitungswasser verbraucht. Erfindungsgemäß fällt dieser Wasserverbrauch weg, da das in den Laugenbehälter einfließende Wasser soweit erhitzt wird, daß eine Knitterbildung weitgehend vermieden wird. - Reduction of water requirements.
Up to now, around 15 liters of tap water have been used to prevent creasing. According to the invention, this water consumption is eliminated since the water flowing into the tub is heated to such an extent that crease formation is largely avoided.

Eine weitere Ersparnis von Leitungswasser ist denkbar, da das zum ersten Spülgang benutzte Wasser ca. die Hälfte der Wassertemperatur vom Hauptwaschgang hat. Wie aus der Praxis bekannt, reinigt das erwärmte Wasser die Wäsche gründlicher, da warmes Wasser wesentlich mehr Waschpulverrückstände aufnimmt.A further saving of tap water is conceivable because First rinse water used about half the water temperature from the main wash. As known from practice, cleans The heated water does the laundry more thoroughly, because warm water is essential absorbs more washing powder residues.

- Reduzierung des Energiebedarfs:
Erfindungsgemäß erwärmt sich das neu einfließende Wasser in den Laugenbehälter auf ca. die Hälfte der Temperatur des vorher abgeschlossenen Waschvorganges. Besonders große Energieersparnis treten beim Waschvorgang: "Kochwäsche mit Vorwäsche" ein.- Reduction of energy requirements:
According to the invention, the newly flowing water heats up in the tub to about half the temperature of the previously completed washing process. A particularly large amount of energy is saved during the washing process: "Cottons with prewash".

- Umweltschonend:
Durch die beiden vorhergehend beschriebenen Vorgänge tritt eine spürbare Entlastung der Umwelt ein. Einerseits wird Wasser, das in Trinkwasserqualität geliefert wird, gespart (ca. 10-15 l Wasser pro Waschprogramm), außerdem wird der Energieaufwand geringer (ca. 50% eines Hauptwaschganges pro Waschprogramm). Dadurch, daß das Wasser nach jedem Waschvorgang in der Konstruktion bis auf ca. die Hälfte seiner Ausgangstemperatur abgekühlt wird, wird die Kanalisation auch nur mit der Hälfte der Temperatur belastet, d. h., nur die Hälfte der Wärmeenergie wird an die Umwelt abgegeben.- Environmentally friendly:
The two processes described above result in a noticeable relief for the environment. On the one hand, water that is supplied in drinking water quality is saved (approx. 10-15 l water per wash program), and the energy consumption is also reduced (approx. 50% of a main wash cycle per wash program). Because the water is cooled to about half of its initial temperature in the construction after each washing process, the sewage system is only loaded with half the temperature, ie only half of the thermal energy is released into the environment.

1st Washing machine housing
2nd Tub
3rd Storage (construction)
4th Drain pump
5 . Lye drain in the tub
6 . Alkaline drain in the store
7 . Lye supply to the store
8 . Water supply nozzle
9 . Alkaline drain in sewers
10th Laundry drum
11 . Incoming water

Fig. 1

Sie zeigt eine schematisch dargestellte Waschmaschine mit allen für die vorgesehene Änderung notwendigen Teile. Wie in der Beschreibung erwähnt wurde, hat die Laugenpumpe (4) eine doppelte Funktion und zwar
a) die erwärmte Lauge in den Speicher (3) zu pumpem
b) nach abgeschlossener Wasserzufuhr durch die Wasserzufuhrdüse (8) die im Speicher befindliche Lauge in die Kanalisation abzupumpem.It shows a schematically illustrated washing machine with all the parts necessary for the proposed change. As mentioned in the description, the drain pump ( 4 ) has a dual function
a) to pump the heated lye into the store ( 3 )
b) after the water has been supplied through the water supply nozzle ( 8 ), the liquor present in the reservoir is pumped out into the sewage system.

Außerdem stellt die Zeichnung einen Zusammenhang zwischen Anbringung des Speichers (3) und der Wasserzufuhr (8) dar.In addition, the drawing shows a relationship between the attachment of the reservoir ( 3 ) and the water supply ( 8 ).

Fig. 2

Sie zeigt eine von vielen möglichen Ausführungen einer Wasserzufuhrdüse.It shows one of many possible versions of a water supply nozzle.

Claims

1. A washing machine, electrically powered, with a tub, a tub pump, a water supply and a water drain characterized in that on the tub ( 2 ) outside a memory ( 3 ) is attached and combined with the water supply nozzle ( 8 ) so that the heated, used water from each previous wash cycle is led into this store ( 3 ) and collected there, and the pure water flows through the water supply nozzle ( 8 ) over the inner wall of the tub ( 2 ), which separates the store from the tub, so that the stored heat is transferred to the pure water. After each completion of the water supply process, the storage tank ( 3 ) is pumped empty.

2. A washing machine according to claim 1), characterized in that the memory is constructed so that all the heat is released only inside into the tub ( 2 ).

3. A washing machine according to claim 1) characterized in that the memory ( 3 ) can be attached in any shape, from any material and at any location of the suds store ( 2 ).

4. A washing machine according to claim 1) characterized in that in the memory ( 3 ) goes in at least the amount of water that is required for the washing process.

5. A washing machine according to claim 1), characterized in that the control of the drain pump is adapted so that the used, warm water is passed into the store ( 3 ) after each wash cycle and after completion of the water supply process by a valve control by means of the drain pump into the sewage system is directed.