Heating electrical appliances.
The operation of electrical heating devices is based on the conversion of electrical energy into heat as a result of:
— heat generation when current flows through an electrical conductor,
— heat generation by an electric arc,
— heat generation in a dielectric located in a variable electric field,
— conversion of electromagnetic to thermal wave energy in bodies irradiated with radiators.
For electrical heating equipment, according to SWW, Include:
• electric heating appliances for indirect cooking and baking – electric kitchens (hobs), Kitchens 3- or 4-plate with oven, rotisserie, Heater;
• electric heating appliances for direct cooking and baking – electric pots, teapots, cookware, toasters, coffee machines;
• electrical equipment for drying - clothes dryers, dish dryers, hand dryers;
• electric heating devices for heating water - brewers (Boilers), pressure electric water heaters;
• heating electrical appliances for ironing - household irons, tailoring, Tourist, with humidifier.
On the domestic market there is a large offer of electric kitchens with standardized widths 50 i 60 cm in two basic colors — white and brown (some even have decorative motifs, like. "piano"). These devices provide the possibility of rapid heating, reaching high temperatures, high purity of this process, are functional and aesthetic.
Many types are equipped with additional devices, how: electric oven, lighting, upper and lower heaters that are switched on independently, electric rotating spit etc.. Some Polish producers of electrical devices have obtained and are entitled to present a certificate, awarded by the Polish Center for Testing and Certification (PCBC) according to ISO standard 9001.
Electric kettles - devices used to boil water in a much shorter time than on electric or gas cookers - 1 l is cooked in approx. 3 Minutes. These very popular and user-friendly devices are made of: high-quality plastic, resistant to high temperatures, hidden heating spiral, constructed of a steel alloy, chromium and nickel. In the latest generations of kettles, nickel-free gold-plated coils are installed, especially useful for allergy sufferers. In addition, these kettles are equipped with removable limescale filters (retaining the sediment very effectively), water level indicators and indicator light. Kettles are very safe to use, thanks to the following solutions:
— automatic switches to prevent complete boiling of water,
— impossibility of incorporation in the absence of water,
— a lid to prevent splashing of boiling water,
— thermal fuse.
Kettles are turned off automatically when water boils; it is also possible to disable manually. Most often they are produced in white, capacity from 0,5 l to 1,7 l and power 1000 – 2000 In.
Extremely easy to use and handy are "wireless" kettles, that can be removed from the stand, to which the network cable is connected, which facilitates free maneuvering when pouring water.
In the trade of goods there are different types of irons. Depending on the equipment and usable purpose, these are:
— household irons: for dry ironing, with humidifier, pressing sets, wireless irons,
— tailoring irons,
— tourist irons.
Irons play an important role in the preservation of fabric products. Various options, with which new irons are equipped, significantly improve ironing. Automatic steam generation, Sprayers, replaceable decalcification cassettes, self-cleaning systems, place to wind the power cord, water tank, long cable, articulated to the iron, are elements of modern irons. Their essential parts include: Cover, Foot, hidden heating spiral. The housing together with the handle is made of plastic, resistant to high temperature. The ironing foot is smooth, Modeled, high end, which allows accurate ironing of hard-to-reach places. It is made of stainless steel, aluminium, sometimes additionally covered with a Teflon layer (polytetrafluoroethylene - thermoplastic material resistant to increased temperature), which prevents the fabric from sticking. Irons have a short heat-up time, lightness, durability and rated power 1000-1900 In. They are all equipped with overheating protection.