Water dispenser
A water dispenser is a device that heats or cools bottled pure water (or mineral water) for people to drink.
Selection of water dispenser
[Safety performance of products]
The water dispenser is powered by power supply, and it is extremely dangerous if the water dispenser has leakage and poor insulation. When purchasing, consumers should first identify the brand of the product and the CCEE product certification mark of China Electrical Safety Certification Committee.
[Type Selection]
Among many brands and models of drinking fountains, there are three types: warm type, ice-hot type and ice-temperature type. Ice heat engine is divided into semiconductor refrigeration water dispenser and compressor refrigeration water dispenser. Deciding what type of water dispenser to buy is mainly based on the number of people drinking water and the cooling speed. As far as the cooling speed is concerned, under the same cooling time, the compressor cools drinking water much faster than the semiconductor refrigeration water dispenser, and the supply of ice water is also more than the latter. Therefore, the compressor-type refrigeration water dispenser is suitable for group companies, institutions, conference rooms, office buildings, offices, bars, karaoke halls and other occasions where a lot of water is consumed. And a small number of units, hotel rooms and ordinary families. It is enough to buy a semiconductor refrigeration water dispenser.
[Price comparison]
The prices of drinking fountains with different refrigeration types vary greatly. Generally speaking, the cost of compressor-type refrigeration water dispenser is much higher than that of semiconductor refrigerator, so the price is generally 2-3 times that of semiconductor refrigeration water dispenser. In addition, the same type of drinking fountains with the same function are divided into two models: desktop (also called seat type) and vertical (also called floor type). According to custom, the desktop is called the popular water dispenser, while the vertical one is called the luxury water dispenser. Generally speaking, the price of a single desktop drinking machine is cheaper than that of a vertical drinking machine 1/3.
[Function Selection]
It is very important to choose a water dispenser from the perspective of functional use. If you don't like to make cold drinks with the water dispenser, you can only make tea and coffee every day. It is practical and economical to buy a warm water machine. If there are many young people, and you are located in the southern tropical region, with high utilization rate in summer and like cold drinks, buy a hot and cold water dispenser. In addition, there are three-purpose machines for ice heating, which can be selected according to needs.
appear
The surface of plastic-sprayed parts of drinking fountains should be smooth, uniform in color and firm in depth, free of cracks, scratches, blisters and other defects, and the joints should be symmetrically connected.
[Water test inspection]
After the appearance is determined, the next step is to test the water. The method and steps are as follows:
First, check the top cover of the water dispenser. If there is no intelligent seat, it means that the water inlet system does not have the ability to prevent secondary pollution, so this kind of water dispenser is not suitable for purchase. Intelligent seats should be installed firmly and removed smoothly. The thread combination of guide post and intelligent seat should be firm; If it is loose, it can't be tightened, indicating that the thread of the guide post and the intelligent seat is not well combined. If it is used in the future, the root of the guide post is easy to fall off or break. After the bottled water is injected into the water tank (generally 2-3 times), the faucet will not drip if it is not pressed (the faucet is normally sealed); Observe the water level in the bucket. If the water level drops sharply, it means that the machine is leaking (caused by the rubber nozzle coming out) and is not suitable for purchase. Press the faucet (cooling takes 1.5-2 seconds, heating takes about 2-2.5 seconds), and water should flow out of the faucet, indicating that the water dispenser is functioning normally. If there is no water outlet or the water outlet is slow, it means that the water inlet is blocked or the machine is abnormal.
After the bucket is inserted into the intelligent seat, the water in the bucket automatically flows into the cold and hot water tank. Due to the internal pressure difference in the bucket, the bubbles in the bucket will rise and make intermittent noises. Press the faucet and press it by hand, and the bubbles and noises will be eliminated, indicating that the water is normal. Check whether the rubber plugs of the drain pipes of the cold tank and the hot tank are firm, and whether there are snap rings stuck on the rubber plugs.
[Electrical Performance Inspection]
Fill it with water, turn on the power supply, press the cooling and heating power switch several times, the switch contact should be good, and the corresponding indicator light will be displayed accordingly, indicating that the circuit of the water dispenser is basically normal. Press the refrigeration switch and put your hand near the air outlet of the backboard. There is a sense of exhaust, and the noise is very weak when you can't hear it. The fan is operating normally. After electrifying for 2 hours, press the refrigeration faucet, and cold water should flow out. For example, semiconductor refrigeration can reduce the temperature of ice water to 5- 15℃, and compressor refrigeration can reduce the temperature of ice water to 4- 12℃. Press the heating switch and heat 15-20 seconds. The water temperature should reach 92-96℃. During this period, the heating indicator light will automatically turn on and off. For drinking fountains with disinfection function, press the disinfection button, and after disinfection is completed within the specified time, it should be able to automatically turn off the power supply and turn off the indicator light. Check that the insulating rubber layer of the power cord is not damaged, and use a power cord with sufficient capacity and a special power plug.
[after-sales service]
You can ask for the warranty card in advance when purchasing, and read it carefully. If there is no warranty card, you'd better not buy it. In addition, it is best to buy a water dispenser from a local manufacturer with a warranty department. Some manufacturers (manufacturers) also provide cleaning and disinfection services, which consumers should consider comprehensively.
Water dispenser pollution
There are three main problems with drinking fountains. First, the boiling temperature of water is insufficient. Most of the water has a maximum temperature of 95 degrees and a reboiling temperature of 90 degrees, so the sterilization temperature of tea is not enough. Second, the warm water of the drinking machine is repeatedly heated to form the so-called "thousand boiling water", so that trace elements and minerals in the water accumulate to form insoluble particles; Third, it is difficult to clean the pilot's interior, and it is easy to accumulate dirt and breed bacteria.
"The water separator that solved the first problem is the water boiler of Xinhui Tengfei Industrial Co., Ltd., and the beautiful water separator that solved the second problem. The company that solved the third problem already has it, but the newspaper date has been forgotten. I'm terribly sorry. These three companies have applied for patents for their corresponding methods, so other companies cannot produce and use their technology. In addition, the water guides of these patents are very expensive and basically do not want us poor people to use them. "
Xinhuanet Beijing, February 22 (Reporter Guo Wei) On February 22, Frank Fang, the marketing director of Zhejiang Cixi Qixi Electric Appliance Co., Ltd., disclosed two shocking "inside stories" in Beijing: one is that the domestic hot water dispenser, which accounts for more than 99% of the domestic market, is "toxic", and the other is that the water dispenser is the "king of power consumption" among household appliances. Chloe Wang, Deputy Secretary-General of China Household Electrical Appliances Association, and Li Fuxing, Chairman of the Healthy Drinking Water Professional Committee of Chinese Medical Association, expressed their support for the "poison theory of inner container" and "champion theory of power consumption" put forward by the other party.
According to reports, in the traditional domestic drinking machine, the heating of water is completed through the built-in hot bladder. According to Frank Fang, it is this kind of liner that highlights the harm of traditional water dispensers:
Boiling for a long time produces "thousand boiling water": drinking water will form "thousand boiling water" after repeated heating in a hot container. This kind of water contains heavy metals, arsenic compounds and other harmful substances, which will endanger gastrointestinal health if drunk for a long time.
Scale becomes "additive": According to the report issued by the national environmental protection inspection department, if the inner container of traditional drinking fountains is not cleaned for more than 3 months, a large number of bacteria, residues and even red worms will grow and attach to the inner wall of hot containers, becoming toxic "additives". After these substances enter the human body, they will cause diseases of digestive, nervous, urinary and hematopoietic systems.
The hot liner is made of "nitrate": the hot liner is mostly made of stainless steel and aluminum shell. The test shows that the nitrite content of iron, aluminum and ammonium in water will increase obviously after long-term heating, and nitrite is a well-known carcinogen.
The "king of electricity consumption" of household appliances: taking 1 liter hot water as an example. Without turning off the power supply, the traditional domestic water dispenser with a power of 0.5 kW consumes 1.8 kWh of electricity every day, which is precisely because of its "on-off" working principle, which invisibly causes more than 90% energy waste.
In order to reveal the problem more intuitively, Frank Fang "dug up" a water dispenser liner collected from Beijing residents' families at the press conference. People can clearly see the rust and thick scale on the inner wall of the hot liner. Frank Fang revealed that at present, more than 99% domestic domestic drinking fountains use this kind of "defective design and structure" liner product.
Li Fuxing, chairman of the Health Drinking Water Professional Committee of the Chinese Medical Association, pointed out that in order to make "water appliances" develop in a healthy direction, the relevant state departments are drafting the industry standard of drinking fountains.