FR2641800A1 - METHOD AND DEVICE FOR CONTROLLING RINSING CYCLES IN WASHING MACHINES - Google Patents

Abstract

Method for controlling rinsing cycles in washing machines, comprising a device for determining the related washing bath, characterized in that both the number of rinsing cycles and the sum of the rinsing factors are varied as a function of the bound wash bath so that the sum of the rinse factors becomes larger the fewer rinse cycles are performed and the smaller the amount of bound wash bath.

Description

The invention relates to a method and a device for controlling the cycles

  rinse apparatus in washing machines comprising a device for determining the bath of

bound wash.

  It is known that as a result of the washing cycles the laundry completely soaked with dissolved laundry products, i.e. dirty laundry, must be rinsed until clean. The rinsing result is all the better as it is diluted and the laundry product contained in the textile fibers is further removed. To this end we try to reach an exchange of almost 100% of this

  bath called washing bath bound with the rinsing water.

  DE-OS No. 20 44 478 discloses a "rinsing method and device for washing machines", with the aid of which the rinsing time and the amount of rinsing water must be reduced. After the laundry has been discharged, water is introduced into the tub of the washing machine to a first determined level, then the bin containing the laundry rotates alternately in one direction and the other at the same time. water is added until reaching a second predetermined level in advance. Then water is added or discharged alternately from this second level i a third lower level, rotating again the tank containing the laundry alternately in one direction and the other. Finally, the water is drained completely from the tank

of the washing machine.

  This command requires a considerable number

  switching elements and construction parts.

  Moreover, since these are only predetermined water levels, no account is taken of the

  amount of laundry load or absorbency

  of the latter; that is to say, a large or small quantity of linen is always rinsed by means of the

  same amount of water and this quantity is often

  aunt without it being really necessary.

  It is an object of the invention to provide a device for controlling rinse cycles or a reaming process as such, which provides an optimum rinsing effect by using as little water as possible,

  this even in the case of small amounts of loads.

  This object is achieved according to the invention since the number of cycles is varied as well.

  the sum of the rinsing factors depending on the

  of the bound wash bath so that the sum of the rinsing factors becomes greater for the sum of the rinsing factors and the amount of the bath

bound wash is lower.

  The advantages that can be achieved according to the invention lie essentially in the fact that

  the total quantity of rinsing water required and

  The number of rinse cycles is determined according to the absorption capacity and thus also according to the weight of the laundry to be washed. We thus ensure

  never use too much or too little rinse water.

  We always get an impeccable and optimal result.

  Even in the case of low charges with absorptive

  low (up to 2 liters of bound wash bath) the proportional ratio of the amount of rinse water still exists. This results in water saving and

energy saving.

  In addition, the modification of the rinsing factors or the sum of the latter as a function of the bound wash bath is not carried out linearly or proportionally. In addition, the number of rinse cycles or the modification of these according to

  bound wash bath is not performed linearly.

  Various other features of the invention

  come out from the detailed description which

  follows. One embodiment of the subject of the invention is represented, by way of non-limiting example, to

attached drawings.

  Fig. 1 is a diagram with the number of

  rinse cycles to be performed depending on the bound wash bath.

  Fig. 2 is a diagram showing the total amount of rinse water as a function of the bound wash bath. Fig. 3 is a diagram with the factor

  rinse according to the bound wash bath.

  Fig. 4 is a diagram showing the sum of the rinsing factors as a function of the bound wash bath.

  The basic idea of the process is, as already mentioned,

  According to the above, the rinsing cycles should first be dependent on the volume or quantity of the bound wash bath. As is known, the bound wash bath is the amount of water or rather the amount of lye that the laundry is able to bind or contain because of its absorbency. The volume of the bound washing bath is, in turn, dependent on the weight of the laundry or the amount of laundry and the washing mode or power

absorption of this cloth.

  However, as regards the different rinsing cycles, the minimum amount of rinsing water can not be less than a quantity conditioned by the apparatus or by its construction. For rinsing, the laundry introduced into the drum must be soaked in the rinsing water, ie the laundry tub must be filled until it exceeds the lower edge of the drum. In the process described hereinafter this end is provided by rinsing cycle 10 to 12.5 liters of minimum rinsing liquid, which are pumped out after each rinsing cycle and replaced by the same amount of fresh water. Continuing with the basic idea, the number of rinsing cycles required also depends on the volume of the bound wash bath. The number of rinsing cycles determines the rinsing result, and - as mentioned at the beginning of the present - a good rinsing result is determined by an exchange of (practically) 100% of the bound wash bath by the total amount of water

rinsing.

  Using two simple calculation examples, the rinsing result (or also the dilution according to a percentage of the basic concentration of detergent product or the exchange of the bound washing bath with the total amount of rinsing water ) is defined according to the number of rinse cycles performed. (In the encrypted example, we used other values than those used in the diagrams.) This was done simply

  in order to demonstrate the rinsing effect).

  Prerequisite: At the beginning of the rinse, 5 grams of detergent must be dissolved in 5 liters of bound wash. This corresponds to a concentration of laundry product of 1 gram

  laundry product per liter of water = 100%.

  First case: A total quantity of rinsing water is provided

  60 liters for three rinsing cycles. That is to say -

  20 liters of water per washing cycle

  soaked in 5 liters and 100% lye.

  First wash cycle with 20 liters of fresh water: In the laundry tub and in the drum

  There are now 25 liters of laundry containing

  5 grams of dissolved detergent or grams of detergent = = 0.2 gram of product 25 liters of detergent per liter

laundry 20%.

  Only one gallon of 20% liquor from the appliance or the laundry tub can be pumped out. (5 liters of bound wash containing 0.2 grams = 1 gram of laundry product remaining

in the linen).

  Second rinse cycle with 20 liters of fresh water: In the laundry tub and the laundry drum are now 25 liters of detergent containing no more than 1 gram of dissolved detergent or 1 gram of detergent = = 0.04 grams of liters of laundry product per liter = product concentration

4% laundry.

  Then you can only pump out

  liters of detergent at 4% of the laundry tub.

  (5 liters of bound wash containing 5 x 0.04 grams - 0.2 grams of laundry product remaining in the laundry). Third rinse cycle with 20 liters of fresh water: In the laundry tub and in the laundry drum are finally 25 liters of detergent containing only 0.2 gram of dissolved detergent or 0.2 gram of product. of laundry = 0.008 grams of liters of laundry product per liter = product concentration

of laundry of 0.8%.

  After pumped out of the remaining 20 liters of 0.8% lye, there remains 5 liters of bound wash bath containing 5 x 0.008 gram = 0.04 gram of

laundry product.

  Result: After three liters rinse cycles, the concentration of detergent was diluted from 100% to 0.8%, or the attached wash bath was rinsed out 4.96 grams.

  to the initial 5 grams of laundry product.

  Second case: The same total amount of rinse water equals

  60 liters is now spread over 4 cycles of rinsing

  cage. By rinse cycle, 15 liters of fresh water are now added to the 5-liter soaked laundry

  and initially 100% laundry.

  First wash cycle with 15 liters of fresh water: In the laundry tub and in the drum

  There are now 20 liters of laundry containing

  5 grams of dissolved laundry product or grams of laundry product = 0.25 grams of liters of laundry product per liter = product concentration

laundry 25%.

  Only one gallon of 25% liquor can be pumped out. (5 liters of bound wash bath containing 5 x 0.25 grams = 1.25 grams of

  laundry product remaining in the laundry).

  Second rinse cycle with 15 liters of fresh water: In the laundry tub and in the drum

  There are now 20 liters of laundry containing

  1.25 grams of detergent or 1.25 grams of detergent = 0.625 grams = 0.0625 grams of detergent per liter =

detergent product A 6.25%.

  Then, only liters of the laundry can be pumped out. 6.25%. (5 liters of the bound wash bath containing 5 x 0.0625 grams = 0.3125 grams of

  laundry product remaining in the laundry).

  Third rinse cycle with 15 liters of fresh water: In the laundry tub and in the laundry drum are now 20 liters containing 0.3125 grams of dissolved laundry product or 0.3125 grams of laundry product = 0, 0156 grams of liters of laundry product per liter = product concentration

of laundry of 1.56%.

  Only 1.5 liters of 1.56% lye can be pumped out. (5 liters of bound wash bath containing 5 x 0.0156 grams = 0.0781 grams of

  laundry product remaining in the laundry).

  Fourth rinse cycle with 15 liters of fresh water: In the laundry tub and the laundry drum are now 20 liters containing 0.0781 grams of dissolved laundry product or 0.0781 grams of laundry product = 0, 0039 gram of liters S detergent per liter; product concentration

of laundry at 0.39%.

  After the final evacuation by pumping the remaining liters of lye at 0, 39%, there remain liters of bound wash containing 5 x 0.0039 gram = 0.0195 gram of laundry product

dissolved in the linen.

  Result: After four liters rinse cycle, the concentration of detergent was diluted from 100% to 0.39% or rinse out of the bound wash bath 4.9805 grams of detergent compared to grams of product from

initial laundry.

  Quantitatively, we eliminated by rinsing alone

  0.0205 gram more bath detergent

  linked to the first case, but

  percent the result of the dilution of the concentration of laundry product improved by 0.80% t 0.39% which is more than 100%. When a total amount of rinse water of 3 cycles of rinsing 4 cycles is distributed, this rinsing is performed much more thoroughly or in other words: the rinsing effect is even worse when there is less rinsing cycles, the additional conditions and the total amount of water

  rinsing being the same elsewhere.

  There is a close relationship between the so-called rinse factor and the sum of the rinse factors and the quantities explained above such as total amount of rinse water, number of rinse cycles, and amount of wash bath bound . Both factors are abstract digits and they are decisive for optimum rinsing results. The rinse factor is calculated: rinse factor = total amount of rinse water (liter) number of rinse cycles x bound wash bath (liter) The sum of the rinse factors is calculated: sum of rinse factors = quantity total rinse water (liter) - number of bound wash baths (liter) rinse cycles x rinse factor. The rinse factors and the amounts of the latter also depend on the washing program chosen, or vary according to the latter. The amount of water per rinse is adjusted to the minimum amount of rinse water that is absolutely essential, specific to the machine or function of the construction. It must be ensured that the drum of linen is immersed again with a sufficient depth in the laundry. The total amount of rinse water depends on the amount of load and type of laundry or, as already mentioned

  times, the amount of the bound wash bath.

  The diagrams according to Figures 1 & 4 serve A

illustrate the above.

  Since the curve, especially in the lower part, is not linear according to FIG. i "bound wash bath - (number of rinse cycles)" it is ensured that an optimal rinsing effect is also obtained in the case of small amounts of charge

  (up to 2L of bound wash bath).

  In the table of values shown below, factors determining optimum rinsing results were reproduced according to the connected washing bath.

  and the number of rinsing cycles obtained by tests.

BOARD

  Column (1) Column (2) Column (3) Column (4) - Column (5) - Column (6) -

(2) x (3) (4) (2) x (5) (1) x (2)

? I .., ...... 'I

  washing bath cycle number minimum quantity total amount rinse factor sum of the bound (L) of water rinse per cycle of rinse water (values between factors of (depending on the (established by flushing (1,) parentheses of (1) counting type of laundry calculation or by (L) not taken in and load) tests) consideration)

> 10 4 12.5 50 1.25 5

6- (10) 3 3 36 2 6

4- (6) 2] 5 30 3.75 7.5

2- (4) 2 10 20 5 10

1> c> O On

Claims (5)

  1. A method for controlling cycles of   rinsing in washing machines, comprising a device   tif to determine the bound wash bath, characterized in that the number of rinse cycles as well as the sum of the rinsing factors as a function of the connected wash bath are varied so that the sum of the rinsing factors becomes the greater the less the rinsing cycles are carried out and the quantity of the washing bath bound is weaker.   2. Method according to claim 1, characterized   in that the different washing cycles have been carried out   killed with a minimum amount of rinse water specific to washing machines.   3. Method according to claim 1, characterized in that the modification of the rinsing factors or the sum of the latter as a function of the bonded washing bath is not performed linearly or proportionally. 4. Method according to claim 1, characterized   in that the number of rinse cycles or the change in   of the latter in relation to the related washing bath   is not done in a linear fashion.   5. Apparatus for carrying out the method according to claim 1, characterized in that in the program control of the washing machine there are provided means for varying according to the washing bath bound as well the number of cycles of washing that the flushing factors or the sum of the factors of rinsing.