During World War II (1945), Spencer, an American radar engineer, happened to find that the chocolate bar in his pocket melted and became sticky while doing radar experiments. He suspected that it was caused by his body temperature, and later he found the thermal effect of microwave in continuous experiments.

Using this thermal effect, the United States issued a 1 patent on microwave in 1945, and Raytheon Company of the United States developed the world's first 1 microwave oven in 1947. In the 1940s, microwave ovens were mainly used in industry and commerce.

Extended data:

Development history of microwave oven;

1, nicknamed "radar wave" furnace

Under Percy Spencer's fancy idea, a new cooking method using microwave heating came into being. ?

1946, Raytheon Company of the United States and Percy Spencer jointly developed a microwave oven for special cooking, and obtained a patent application for cooking food by microwave, and obtained the first patent for microwave oven the following year.

1947, the world's first household microwave oven came out. There is a water-cooled magnetron, weighing 1700W, more than 340 kilograms, and 6 feet high. The finished product can only be put in Boston Hotel when it is inspected, and its price is very expensive-3000 dollars.

1964, Keiji Kokura of Japan improved the magnetron of the microwave oven, which greatly reduced the price of the microwave oven.

1965, George? Foster and Percy Spencer designed a durable and cheap microwave oven, which was a great success in America.

1967 microwave ovens have finally slimmed down, and people's views on microwave ovens have also changed. It is petite and fast, and it takes only a few minutes to finish cooking that might take hours in the past. Amana launched a $495 microwave oven and started the journey of becoming the main force of family kitchen.

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