1998 One day, my daughter said, "The toilet in our house kept ringing for 24 hours, which made me sleepless all night." At that time, Liu Defu's hearing was not very good. After listening to his daughter's words, he began to notice that the toilet at home was really leaking badly, and a lot of water was used every time.
"I have carefully observed that the maximum water consumption at a time is more than 20 liters. What a waste it will cause in the long run! " Since then, Liu Defu began to pay attention to this issue. After a period of investigation, it was found that the toilets in many communities in Beijing used too much water because of various reasons such as uncleanness and frequent leakage. "So, I sprouted the idea of changing the status quo by using my own physical expertise, and began to study the patent portfolio of the 3-liter large-impulse water-saving traditional toilet, striving to achieve no more than 3 liters per flush, and embarked on a difficult but fun road. The road to invention. "
For this invention, Liu Defu maintained the rigor and perseverance peculiar to scholars. The six-year road of invention cost him a lot of energy and financial resources, and was questioned by all sides, but he persisted. "It's really hard to start making molds." Liu Defu said that he rented a house in a small factory in Henan at first, but when it was windy and rainy, the house kept leaking. The conditions are indescribable, and sometimes he can't even drink boiled water. "These are nothing. The most bitter thing is that I took many detours in the design process and encountered many doubts. " Liu Defu said frankly that for a long time, because of wrong thinking, although he spent a lot of money, he didn't make a mold. After that failure, he decided to simplify the process and re-provide the scheme, but it still failed. At this time, many people began to question the rationality and feasibility of this technology and advised him to give up. But he persisted, and I don't know how many times he tried and withstood the heavy pressure from all sides. In the summer of 2004, this invention finally came out successfully. "I am so happy to see the first mold I designed!"
Full of joy, Liu Defu tried his patent on a small scale and achieved good results, saving 3 liters to 5 liters per flush. In several pilot projects in Nanshagou, Sanlihe, Beijing, since the user installed his patent, the original water consumption has been reduced from 1 1 liter/time to 6 liters/time, and each household can save 15 1 yuan every year. "In this way, the country can save at least tens of billions of yuan!"
Therefore, Liu Defu decided to promote this patent to benefit more people. What he didn't expect was that in this process, he tasted bitterness and helplessness. "I'll contact Beijing Water Saving Office first. The staff told me that toilets in several communities are very suitable for adopting this technology, but in the end there is no result; Then, I contacted several famous toilet manufacturers and got the reply that' the technical update is complicated and difficult to adopt'. I also thought about buying some toilets to promote myself, but I had to give up because of the high cost. " Looking back now, the old professor is still sour in his heart.
"It took six years and a lot of hard work. Saving water in toilets is a good thing, but it is difficult for more people to enjoy its benefits with my meager strength. How to make water-saving patents applaud and popularize water-saving patents deserves the attention of the whole society. This is also the wish of our patentees. " Liu Defu said.