The process and trend of induction cooker
May 15, 2022
The earliest record of the commercialization of the induction cooker was started by a German company in 1957, and then the research and development of the induction cooker began in the United States in 1972. By the beginning of the last century, the induction cooker had become popular in the West. The United States has a long history of researching induction cookers. The induction cooker has been developed more than 100 years ago. Because the thermal efficiency of this kind of induction cooker is not very high, and it is easy to generate power frequency noise, it has not been widely promoted. In the 1970s, the United States took the lead in developing a high-frequency induction cooker (operating frequency 20-50KHz), followed by Japan. The domestic induction cooker market was initially launched in the late 1990s. In the early 1990s, due to insufficient technology, it was difficult to adapt to the unstable quality of the domestic power grid and the Chinese people's hot food demand. There was a gap period, and it did not appear until the end of the century. The improvement has attracted the attention of the domestic home appliance industry, followed by the birth of many home appliance brands and new products. The domestic induction cooker market is at least 5-10 years later than that of western developed countries. With the advancement of technology and the improvement of the quality of components, the domestic induction cooker has become mature.
The development of domestic induction cooker has roughly gone through the following stages:
The first-generation products include environmental protection brand (including Yada) induction cookers, etc., which are characterized by the use of independent oscillation units, multiple power tubes in parallel, and discrete components for the drive amplifier circuit. The circuit reliability is good and the work is stable. Maintenance is not easy.
The second-generation products include Shanghai Dexing and Fujibao induction cookers, 3 pieces of LM339 for the control circuit, using the principle of large loop oscillation, the heat preservation function is realized by hardware circuit (using 74Lsl45), and the power tube is IGBT. The reliability is acceptable, but the disadvantage is that the circuit More complex, the repair rate is slightly higher.
The third-generation products include Midea PSD series products and Zhejiang Yongkang company's induction cooker products. Midea PSD series products adopt the principle of large loop oscillation, and its protection circuit is very perfect. It focuses on solving the problems that have long plagued other domestic manufacturers such as sudden power-on and burn-in during the working process. It is the first relatively mature induction cooker product using IGBT in China. . The disadvantage is that the circuit is complicated and maintenance is not very convenient. Jialing induction cooker is developed and produced by Shenzhen Topbond Company. It adopts independent oscillation unit, and its reliability is very good. The disadvantage is that the circuit is more complicated and the production test is inconvenient. The fourth-generation products include Midea PD series products and Guangdong Nanhai Weilibao induction cooker. Midea PD series products are characterized by simple and reliable circuit design, good working reliability, and reduced cost of PD series products. The Weilibao induction cooker is designed and produced by Shenzhen Topbond Company. It is the first domestic product to improve the Panasonic induction cooker. Its reliability index is comparable to that of the Panasonic induction cooker.
