How a washing machine weighs laundry

Not every device designed for washing things and equipped with an automatic weighing function can accurately determine the weight of the loaded dirty laundry. This characteristic is more likely to be advertising in order to assign a higher price for the washing machine and increase its popularity among users. In reality, washing machines with a laundry weighing function are equipped with special sensors that can determine the number of kilograms loaded into the drum and adjust the washing process to a specific volume of items. Let's take a closer look at how the automatic counting function works.

The procedure for determining the weight of loaded items

A simple washing machine can determine the weight of the laundry loaded into the drum, but the information will be approximate. A similar function is assigned to a pressure switch that measures the liquid level, which helps it determine the weight of dirty items in the drum.

The pressure switch's operating algorithm is as follows:

• the drum loading hatch door closes;
• the washing machine begins to draw water, spinning the drum so that the items are completely wet;
• the pressure switch monitors the level of liquid entering the drum, which is necessary to start washing, and transmits information about the speed of its collection to the control board;
• an electronic modular device analyzes the information received and approximately determines how much liquid the items absorb before washing.

The slower the water is drawn into the drum, the greater the weight of things in it. It is worth noting that the pressure switch does not provide accurate information, because lightweight materials are less saturated with water, creating the impression that the washing machine tank is full. However, controlling the liquid level helps save water consumption during washing by twenty to thirty percent, adjusting the established program to the specified parameters.

Modern models of washing machines, which have the function of determining the weight of the laundry in the drum, work on a different principle. They can determine the weight of the laundry placed in the machine drum with an accuracy of up to a kilogram. Based on the measurements taken, such devices are capable of refusing to activate the washing process due to excess weight in the drum or suggesting the owner to use special software that allows saving electrical energy and water.

The weight of the laundry loaded into the drum is determined using an electric motor. In such washing machines, the motor is located on the axis of the drum, which makes it possible to monitor the rotational forces and the voltage generated by the motor. Based on the received readings, the processor of the washing device determines the weight of the laundry placed in the drum.

Examples of the best models

Here is a description of some washing machines that are capable of determining the weight of the laundry in the drum before washing.

Siemens WM 16 S 740

A device for washing clothes is able to accurately determine the weight of the bookmark. In addition, when taking measurements, the system simultaneously analyzes the level of dirt and their nature, selects the most appropriate program mode from the available fourteen options and activates the washing process automatically, without requiring confirmation of the start command.

Thanks to the instant response and accelerated scanning process, this stage does not take much time, and the washing ends in a quarter of an hour, without at all affecting the quality of the items and saving energy resources. Another innovation is a sensor that controls the transparency of the Aqua Sensor liquid used in washing.

The device is equipped with a special photocell that determines the level of water purity during rinsing. The manufacturer has also provided complete protection against leakage during the washing process, Aqua Stop, which controls the circulation of liquid and stops the work process at the first suspicion of water leakage.

In addition, the machine for washing clothes is equipped with a blocker of the panel buttons from accidental pressing by children, sound accompaniment of the working stage, the ability to postpone the start for twenty-four hours, control for imbalance and foam formation.The control is electronic, which allows the machine to simultaneously wash several types of materials.

Gorenje Premium Touch WA 65205

Washing machine with vertical loading of laundry, accurately determining the weight of the drum filling. All you have to do is load the machine with dirty clothes and press the start button for the system to independently determine the weight and select the optimal operating mode. The ideal determination of the working cycle duration, liquid temperature and spin speed is guaranteed by special sensors and an electronic control unit with the Use Logic function.

Using this technology, information about the types of material and the degree of its contamination is collected and analyzed, and optimal consumption of liquid and electrical energy is ensured. The automatic washing machine is controlled using a liquid crystal display; all operating modes and set commands are displayed in Russian.

The same screen provides information about the temperature of the water, the spin speed, the time remaining until the end of the wash, the amount of liquid consumed in liters and electricity in kW. The process is provided with sound, the start can be delayed for a maximum of twenty-four hours, the formation of foam is under constant control, the amount of liquid consumed for washing is dosed automatically, the panel and loading hatch of the drum are reliably blocked from small children.

The safety of the work process is ensured by numerous sensors that monitor the level of overheating, overflow and the possibility of leaks. In addition to the listed advantages, it should be added that this model of washing machine has twenty-nine operating programs, which include the “easy ironing” function.