Rice cooker
Introduction:
1. The rice cooker, also called rice cooker and electric cooker, is a modern cooker that can be steamed, boiled, stewed and braised. The first electric cooker in the world was invented by Tokyo Communication Engineering Company in Inoue, Japan in 1950. The electric cooker is convenient to use, clean and hygienic, pollution-free, time-saving and labor-saving, and can also play a role in heat preservation while cooking food.
2. The rice cooker is one of the indispensable appliances for household modernization. At present, common rice cookers are divided into three types: automatic heat preservation type, timed heat preservation type and new microcomputer control type.
Introduction:
1. The heating elements of the rice cooker include the heating plate of electric heating tube and the heating plate of PTC element. The heating plate of electric heating tube has good insulation, corrosion resistance, thermal conductivity and mechanical strength, long service life and high efficiency; The heating plate of P.T.C element has the characteristics of positive temperature resistance coefficient and automatic temperature control, with high efficiency, no open flame and little influence by power fluctuation.
2. The temperature control elements of the rice cooker include bimetal temperature control system and magnetic material temperature control system, the former is not as safe and reliable as the latter. Electric cookers are divided into combined type and integral type according to the structural form of the cooker body; According to the different pressure in the pot, it can be divided into low pressure type (0.04MPa), medium pressure type (0. 1MPa) and high pressure type (0. 15 ~ 0.2 MPa). According to the way of heating food, it can be divided into direct heating and indirect heating.
Since 1950s, rice cookers have become popular. 1986 The output of rice cookers in the United States was 5.9 million, that in Japan was 6.902 million, and that in China was 10263200. In the mid-1980s, electronic rice cookers equipped with microprocessors began to be put on the market (firepower, temperature, time, heating mode, etc.). ).