MSome household appliances have gone out of fashion, but they can be useful for certain applications. So there are not many manufacturers who have spin dryers in their product range. No wonder, modern washing machines outperform each other in terms of spinning performance. Basically, the higher the speed, the drier the laundry. This saves the dryer work or reduces the time on the line, but sensitive clothing creases more.
Tumble dryers need a lot of electricity because wherever heat is generated, the hunger for energy is particularly great. If you squeeze the last bit of water from the laundry at an even higher speed, there should be further savings potential. This is how the manufacturer Robert Thomas from Neunkirchen advertises, he has such specialists in two sizes in his program. So we tried the Centri 776 in the luxury version with stainless steel housing for around 250 euros.
The cylindrical device with a diameter of 33.5 centimeters and a height of 66 centimeters weighs only about eleven kilos. The drum is vertical, the damp clothes are stuffed into it tightly to just below the edge, so there can be no imbalance. In the larger model it holds 4.5 kilos of dry laundry, in the smaller model it is 3.5. If you fill it contrary to the instructions, it will run out of round, in extreme cases the elastically suspended drum will hit the housing, so that the operator will immediately stop voluntarily.
2800 revolutions per minute are not for delicate textiles
Starting and stopping is easy using the locking lever on the lid. If the centrifuge is filled correctly, it starts up gently and picks up speed with a subtle whirring sound until the maximum speed of 2800 rpm is reached. That is considerably more than modern washing machines can achieve, but the diameter of the drum is smaller at around 26 centimeters. For comparison: the washing machine recently purchased at home spins at up to 1600 rpm, but has an inner drum diameter of 49 centimeters for 7 kilos of laundry. For this you have to know that with double the diameter the centrifugal force doubles, but quadruples with twice the speed. Despite the enormous revolutions, the sling runs smoothly and with little vibration. According to the supplier, it is suitable for all types of laundry and did not damage anything in our tests, but we would not expose extremely delicate, expensive textiles to the high centrifugal forces.
The principle of drainage is always the same. It is pushed outwards through holes in the drum wall. The Centri has a nozzle in the lower third, from which a gush of water emerges after a few seconds. This takes half a minute to three minutes, depending on the moisture in the laundry, at the end it just drips. If there is no drain in the floor in the laundry room, a bowl must be used. However, their edge must not be higher than 18 cm.
The dryer no longer has to remove every drop that the centrifuge pulls out
The decisive factor for the question of how long the dryer has to be used or how long the laundry hangs on the line is the residual moisture, i.e. the ratio of water to dry weight. If a piece of laundry weighing one kilo still contains half a liter of water, that corresponds to 50 percent. Depending on the spin speed and with the same drum diameter of the washing machine, around 60 percent residual moisture is specified for 1000 rpm, 50 percent for 1400 rpm and around 45 percent for 1600 rpm. The spin dryer from Thomas should achieve 40 percent, more is hardly possible with spin.
The advantage of the Centri for the nowadays rather rare hand washing is obvious, but what does the device bring for the owners of a washing machine? It depends. According to the provider, an additional 0.3 liters of water can be extracted from a washing machine load spun at 1200 rpm. That works, we determined 1.2 liters after 600 rpm and no more than 0.1 liters at full speed of 1600 rpm. The dryer no longer has to remove every drop that the centrifuge pulls out. According to a rule of thumb, 0.5 to 1.5 kWh are required for every 10 percent residual moisture. In contrast, the energy consumption of the centrifuge is low, the motor has a power consumption of 350 watts and it only runs for a short time. With a separate spin dryer you can save electricity, and the more so, the more humid the laundry would otherwise be when going to the dryer.