Miele Softtronic - why one rinse less when C°>= 60 ?

[favorit]

My 10 y.o. novotronic on cotton cycle cuts one rinse in case of "short", adds one rinse when choosing "water+" and adds a rinse if spin speed is lover than 700 rpm. This makes sense to me, as faster interim spin speed improves rinsing.
The temp you choose doesn't affect the number of rinses

My brother' and SIL' W3264 on cottons/no otpions makes 2 rinses instead of 3 when selected temp is 60°C or more. Why the h#ll ??
A reason could be that many detergents dissolve better in hot water, but i'm not convinced

 

[dj-gabriele]

Does the machine do a diluition rinse/cooldown after the wash?

 

[favorit]

cooldown

The cooldown is default on Minimum Iron

To save water, Cottons cycle hasn't a default cooldown step. Anyway you can enter into the menu settings and allow a cooldown for cottons 75 and 95°C.

To avoid creases after the wash drain and before balancing the machine keeps on tumbling back and forth as old machines without balance control. When load temp is lower than a target (guess 50°C) it starts distribution and increases speed very slowly to let the pump drain properly without sudslock. This pattern is differen't or aborted in case of low temp wash or small loads that loose heat very fastly

Anyway the cooldown isn't that much effective as a rinse.

The old sensor machine has a water wasting cool down on minimum iron. It keeps on alternating fills to max level and drains to min level. this goes on for about 3 mins, then it drains and makes two rinses and final pulse spin (the only one in the whole cycle)
Often there are suds in the boot after final spin.

This never happens with the novotronic minimum iron. Despite it uses less water, it rinses better, cause it spins after each drain.

 

[washboy2005]

Adding an extra rinse...

Miele rinsing still works on quite an old theory. This theory being that lower temperatures generally used to need more detergent to work effectively. And therefore requiring extra rinses to rid the load of detergent. Nowadays we know that this is not generally the case.

This is why Miele's do an extra rinse on cycles with a temperature below 60c.

Hope this helps

 

[rudin1969]

Could it be because 60C Cottons is the standard programme for AAA testing? Consumer magazines usually test the 40C Cottons programmes, and they normally give ratings for rinsing

 

[askomiele]

Are you sure washboy?

I thought the extra rinse was because of the new theory of rinsing. The proces of diluting works best when the temperature of the rinsewater is equal to the temperature of the soapywater inside the fibers. When you was on 60°C, after the intermitted spin, the laundry is still hot, therefor it speeds up the proces of 'heating' the cooler rinsewater. When you was on 30°C the difference in temperature is less, so the it takes longer to get both tempertures equal. That's why there is an extra rinse. The time of rinsing only starts counting down when the temperature of the rinsing water stops rising. The machine knows that at that point the temperature of the soapywater between the fibers is equal to the temperature of the rinsewater.

 

[mielerod69]

its called sensor rinse

Hi Favorit,

Askomiele is on the right track. When washing above 60 degrees in Cottons, the programme uses the sensor rinse system. It calculates how long it takes to equalise the rinse water temperature. Once there is no further rise in temp, then the wash liquor has been transferred into the rinse water. This also determines the amount of water and time required for the final rinse. More absorbent laundry requires more water and a longer final rinse time. When washing at lower temps the programme introduces an additional rinse, since sensor rinse does not work under 60 degrees

 

[favorit]

Thanks 4 double answer

I asked for one question ... you even answered to another one I haven't asked yet.
As miele never mentioned turbidity sensors in washing machines, I was also wondering how the sensor rinse tech works

Thanks
Carlo