Two answers:
Drinking water overnight is a drinking habit of many people. However, two primary school students in Beijing proved through scientific experiments that water can be drunk overnight. In the science and technology museum, they conducted comparative chemical analysis with water samples of tap water after leaving the hot water for one, two, and three days to measure the pH value, phosphate, nitrate, dissolved oxygen, chlorine, chemical oxygen consumption, etc. The values ??are within the normal range, which means that overnight water has no side effects on the human body and can be drunk.
Two primary school students conducted this experiment because they made secret visits to some agencies and found that an office of a certain agency filled four thermos bottles of boiling water every day and poured out more than one bottle the next morning. This agency has 62 offices in one city and drains 38 tons of water a year. How many offices are there in Beijing and how many offices are there across the country? The amount of water wasted just by not drinking overnight water is a staggering figure.
Two primary school students used science to tell people that water can be drunk overnight, and also put forward specific water-saving suggestions: first, be careful with your budget and pump as much water as you drink; second, focus on recycling and prepare some clean containers Concentrate the leftover water and use it for other purposes; the third is to use an electric water heater to drink as much as you drink. It should be said that these suggestions are not difficult to implement.
Our country is a country short of water resources, but on the other hand, there is serious waste of water resources. Establishing awareness of water conservation, effectively utilizing limited water resources, and eliminating all waste of water resources are major issues directly related to the future survival and development of our nation. Faced with the "scientific" advice from two elementary school students, shouldn't all adults do better?
The General Administration of Quality Supervision, Inspection and Quarantine said repeated heating of water may not be harmful
On February 22, Zhejiang Cixi Qixi Electric Co., Ltd. held a press conference in Beijing. Fang Shuguang, the company’s marketing director Two industry "shady stories" were revealed that shocked everyone: 99.3% of the hot water dispensers used in China are "all poisonous"; traditional water dispensers are the "hidden champion" of power consumption among all household appliances. As soon as the news came out, it immediately triggered a huge reaction in the market. So, is the water dispenser in a consumer’s home a “poison maker”? How do experts judge the "toxic theory"? The reporter conducted relevant investigations on this matter.
●Core event: “All hot-gallon water dispensers are poisonous”
A piece of news that 99.3 water dispensers are poisonous immediately triggered a huge response in the market. Is it true or is there something else hidden? The reporter conducted relevant investigations into whether the drinking fountains were toxic. On February 22, at a press conference held by Zhejiang Cixi Qixi Electric Co., Ltd. in Beijing, the company’s marketing director Fang Shuguang revealed two industry “shady stories” that shocked everyone: 99.3% of hot-gallon drinking water is used in China "All machines are poisonous"; traditional water dispensers are the "hidden champion" of power consumption among all household appliances.
Fang Shuguang believes that 99.3% of the water dispensers currently used in domestic households are hot-gallon products that have congenital defects in design and structure and are unhealthy.
What is particularly worth noting is that with a gallbladder water dispenser, “drinking water will form ‘thousands of boiling water’ after it is repeatedly ‘heated-cooled-reheated’ in the hot bladder.” Fang Shuguang's reason is: "Although Qianbo water looks clean, it is a concentrated liquid of harmful substances such as heavy metals and arsenic compounds. Drinking it for a long time will interfere with people's gastrointestinal function and cause diarrhea and abdominal distension."
At the press conference, Fang Shuguang quoted a test report issued by the national environmental testing department. The report shows that if the inner tank of a traditional water dispenser is not cleaned for more than three months, a large number of bacteria, residues and even red worms will breed, which will adhere to the inner wall of the hot tank and become toxic "additives" to drinking water. After the water dissolved in this "additive" enters the human body, it will cause digestive, neurological, urinary and hematopoietic system diseases, and even cause premature aging.
Are most water dispensers on the market toxic? Are the drinking fountains in consumers’ homes a “poison maker”? How do experts judge the "toxic theory"? When reporters interviewed relevant parties on related issues, they unexpectedly got different answers.
●Three major questions: The "toxic theory" is suspected of hype
Question 1: Where does the data that 99.3 water dispensers are toxic come from?
Chen Licheng, marketing director of Zhejiang Cixi Qixi Electric Co., Ltd., told reporters that this data is based on sales statistics in the market. Currently, only 0.7% of manufacturers including this company produce bile-free water dispensers on the market, and most manufacturers produce bile-filled water dispensers. Therefore, there is a conclusion that "99.3% of water dispensers are toxic."
Fang Shuguang, marketing director of Zhejiang Cixi Qixi Electric Co., Ltd., said that the reason why the data of 99.3 is thrown out is just to illustrate that if the gallbladder water dispenser is not cleaned for more than 3 months, it will breed bacteria and cause two problems. pollution.
At present, there are only two domestic companies that produce bile-free water dispensers. "Such data is only the result of a survey in the Ningbo market. According to the survey, if the inner tank is not cleaned for three months, it will be very dirty. The scale is harmful to the human body. There are only 0.7 bladderless water dispensers on the market that do not require cleaning. The problem of scale can be ignored with courageless water dispensers.”
Question 2: Is there no scale at all without guts?
According to Fang Shuguang, the drinking water in water dispensers is usually divided into mineral water and purified water. Mineral water is prone to scale when the water temperature is high. When a gallbladder water dispenser is heated repeatedly and produces "thousands of boiling water", the scale phenomenon cannot be avoided. This problem cannot be avoided with courageless water dispensers, but the scale phenomenon is not obvious, and even if it does occur, it takes a long time to form, maybe two or three years.
Question 3: Is the "toxic theory" a hype?
As for whether the toxic theory is a vicious hype, Fang Shuguang believes that the emergence of courageless water dispensers is the discovery of a good solution, and issues related to water health have been plaguing water dispenser manufacturers. "Now we have the responsibility to explain this issue to consumers, hoping that consumers can drink healthy water. I don't think this is vicious hype. We also hope to cooperate with traditional water dispenser manufacturers in this regard," Fang Shuguang said.
Eight types of water you should not drink
There are different opinions on whether water dispensers are toxic, but no matter which is right or wrong, we must drink water healthily and remember the eight types of water we should not drink. .
Unboiled water: The chlorine in tap water can interact with organic substances remaining in unboiled water, which can easily lead to bladder cancer and rectal cancer; raw water in the wild contains harmful bacteria, viruses and parasites. After drinking, you are prone to acute gastroenteritis, hepatitis, typhoid, dysentery and parasitic infections.
Unboiled water: Drinking unboiled water increases the likelihood of bladder cancer and rectal cancer by 21-38%; when the water temperature reaches 100 degrees Celsius, harmful substances will be greatly reduced with steam evaporation, such as Continue boiling for 3 minutes and it will be much safer to drink.
Re-boiled water: If boiled water is re-boiled, the nitrite content in the water will exceed the standard, causing damage to the human body and even cancer over time.
Water that has been left in the air for a long time: cool boiled water cannot be exposed to the air for too long, otherwise it will lose its biological activity and lose many special functions; if the time is too long, not only will there be no various minerals, but also It may also increase the content of certain harmful substances.
Overnight water: The water stored in a thermos bottle is not the boiled water of the day, it is similar to the water that has been left in the air for a long time.
Aged water: water that has been stored for a long time without moving. Drinking this water regularly will significantly slow down cell metabolism in minors and affect growth and development; accelerate aging in middle-aged and elderly people; lead to esophageal cancer, The incidence of gastric cancer is increasing day by day.
Thousand-boiling water: Thousand-boiling water is boiling water that has been boiled on the stove overnight or for a long time, as well as water that has been boiled repeatedly in electric water heaters. Drinking this kind of water for a long time will interfere with people's gastrointestinal function and cause temporary diarrhea and bloating.
Steamer water: Steamer water is the remaining boiling water at the bottom of the pot for steaming steamed buns, rice and other foods. Frequent drinking of this kind of water, or using this kind of water to cook porridge, can cause nitrite poisoning. Scale often enters the human body with the water, causing diseases of the digestive, nervous, urinary and hematopoietic systems, and even premature aging.
●Authoritative statement - General Administration of Quality Supervision, Inspection and Quarantine: Repeated heating may not be harmful
In response to the quality and safety issues of household water dispensers that are currently widely concerned by society, the relevant person in charge of the General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China said that my country National standards have corresponding regulations on the hygiene indicators and electrical safety indicators of products such as water dispensers and stainless steel tableware containers. The General Administration of Quality Supervision, Inspection and Quarantine will intensify national supervision and spot inspections of stainless steel tableware such as drinking fountains.
Regarding the quality of the stainless steel liner of the water dispenser, the relevant person in charge of the General Administration of Quality Supervision, Inspection and Quarantine pointed out that from the analysis of the working principle of the water dispenser equipped with the stainless steel liner, the water in the water dispenser is heated repeatedly, but it cannot It is believed that the inner tank of the water dispenser will produce harmful substances such as heavy metals and arsenic compounds. The stainless steel inner tank that meets the national standard requirements is safe after testing.
●Expert opinion: The "toxic theory" is groundless
Wang Lei, deputy secretary-general of the China Household Electrical Appliances Association:
Wang Lei, deputy secretary-general of the China Household Electrical Appliances Association, was accepting During the interview, the reporter said that he participated in the company's new product launch conference to support the technology of the new product, but he did not agree with the so-called "toxic theory" of the water dispenser. "As a company, they can express right and wrong about being bold and courageous, but in a responsible attitude towards consumers, the theory that water dispensers are 'poisonous' lacks scientific basis. So far, I have not heard of anyone being blamed for drinking. The water in the drinking fountains was poisoned," Wang Lei told reporters.
In Wang Lei's view, the courageless water dispenser not only enriches the variety of water dispensers, but also avoids some problems caused by the use of courageous water dispensers, such as "thousands of boiling water". But "in places with large water consumption, where a bucket of water is consumed in a day or two, a courageous water dispenser should not have these problems."
Are courageless water dispensers really perfect? Wang Lei also raised questions: "A courageless water dispenser cannot produce ice water. In addition, when using a courageous water dispenser, the scale is formed on the surface of the inner tank. So, where is the scale in a courageless water dispenser? Especially in the north, scale is formed. In relatively serious areas, how to solve the problem of scale in bladderless water dispensers deserves our attention."
Li Fuxing, director of the Healthy Drinking Water Professional Committee of the China Association for Medical Promotion:
It was alleged that he was on-site at the time. Li Fuxing, director of the Healthy Drinking Water Professional Committee of the China Medical Promotion Association, who favors bold water dispensers, stressed in an interview with reporters that he had "never said anything" about the "thousand boiling water" containing heavy metals and other harmful substances.
According to Li Fuxing, at the press conference held that day, he focused on the issue of secondary pollution from drinking fountains. "Any science and technology has a double-edged character. The main problem with water dispensers is secondary pollution. We have done tests and found that odor will occur when the cold water in the water dispenser is left for seven or eight days. Therefore, the most common method is Water dispensers should be protected from light as much as possible.” Li Fuxing believes: "I don't think there is any scientific basis for the toxic theory. Now all drinking fountain manufacturers are seeking to solve the problem of secondary pollution. An effective way is to clean the drinking fountains frequently."
●Interview Note: Don’t forget to read the instruction manual
During the interview, the reporter also found that the product instructions of regular water dispenser manufacturers indicate that the water dispenser should be cleaned after 3-6 months of use. Water dispenser manufacturers basically provide door-to-door cleaning services for customers.
However, what is concerning is that many consumers rarely read the product instruction manual after purchasing a water dispenser. Not only for water dispensers, but also for many home appliances, consumers rarely read the operating instructions after purchasing them. Today, when people are increasingly concerned about the quality of life and whether they are healthy, when using home appliances, should consumers carefully read the "product instruction manual" that brings convenience to them?