How did the fire extinguisher come from?

The first modern fire extinguisher was invented by George Mumby of England in 18 16. At that time, the design was to put compressed air and 3 gallons (about 7 liters) of potassium carbonate solution into the copper tank. Since the end of 19, carbonate sulfate fire extinguishers have been used. 1905, Professor Laurent of Russia invented a foam fire extinguishing agent in St. Petersburg. Its principle is to mix aluminum sulfate with sodium bicarbonate solution and add stabilizer. After spraying, foam containing carbon dioxide is generated and floats on burning oil, paint or gasoline, effectively isolating oxygen and suffocating the flame. 1909, American Davidson obtained a patent to use carbon dioxide to squeeze carbon tetrachloride out of a fire extinguisher. This liquid will immediately turn into a nonflammable heavier gas to put out the flame. Since then, humans have invented small fire extinguishers such as dry powder fire extinguishers and liquid carbon dioxide fire extinguishers.