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Small invention saves more than 600,000 tons of water
Source:      Release time:2005/11/12

When you turn on the water heater before taking a shower, a lot of cold water will be wasted. Can this water be saved? A small question mark led to a small invention by citizen Nie Liang: a remote control water-saving device for water heaters.


According to calculations by a professional evaluation company, if this device is installed on home water heaters, the country can save more than 600,000 tons of water a year, which is equivalent to saving the water volume of three medium-sized water plants.


The cold water stored in the pipe connecting the water heater and the faucet is called "ineffective hot water before use". It is often wasted before taking a shower, which has become a problem in people's lives. Mr. Nie's gas water heater is installed in the kitchen, and the length of the pipeline from the bathroom in the bedroom is about 11 meters. According to preliminary calculations, 6 to 7 liters of invalid hot water will be discharged for a shower in summer, and 15 to 16 liters of invalid hot water will be discharged for a shower in winter. After repeated experiments, Mr. Nie finally found a trick to solve the problem.


Recently, he demonstrated the use of the remote control water-saving device for water heaters to reporters at home. When he wants to use the hot water in the bathroom, Mr. Nie first presses the button on the remote control that represents the faucet, and the gas water heater in the kitchen starts to work. A special solenoid valve is also installed on the faucet. When the remote control is pressed, the solenoid valve receives the command to switch at the same time, so that the hot and cold water pipes that were originally "divided into two routes" are connected into a closed circulation path. Under the action of the booster device, the cold water in the pipeline is continuously circulated to the water heater for heating until the target temperature is reached. When the actual water temperature reaches the target water temperature, the digital thermometer prompts the owner to turn on the faucet.


At this time, the author turned on the faucet and put his hand under the faucet to find that the water coming out was indeed hot.


Mr. Nie introduced that this water-saving device is applicable to gas water heaters, electric water heaters and solar water heaters, and has obtained a national patent. But he expressed concerns about whether the water-saving device can be promoted. He said that at present, each of this device costs about 150 yuan, and the 6 to 7 liters of water saved before each bath is only worth a few cents, and it will take a long time to offset the cost of purchasing the device. Therefore, he is worried that citizens may find it uneconomical and even refuse to invest in manufacturers.


There are more than 90 million households in my country with water heaters installed. If every household installs this water-saving device, the social benefits will be considerable. Experts pointed out that if it is difficult to promote it directly to citizens, it is possible to cooperate with national water heater manufacturers. In this way, not only will the water heaters have a new selling point, but citizens can also save water after purchasing them. In addition, many countries in the world, such as Singapore and Israel, have a water resource gap. If this water-saving device is commercialized and exported overseas, it may achieve greater economic benefits.


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By:Doing