About the new national standard GB 10 for water heaters that will be implemented on 2012.07.01, no longer die of ignorance when buying electric water heaters - authority
Some manufacturers of instant electric water heaters are also called Instant electric water heater is the latest popular type of household electric water heater in recent years. It is sought after by many consumers due to its small size, fast heating speed, energy saving and many other advantages. Consumers should consider the following aspects when purchasing. Comparison:
1. Safety: Check whether the manufacturer is a regular manufacturer and whether it has been registered by relevant departments such as industry and commerce. For electrical products, it is especially important to check whether it has passed 3C compulsory certification, EU CE certification, and German GS certification. and other domestic and international authoritative certification marks. Whether the installer installed it in accordance with the product manual standards - the power cord meets the standards and is reliably grounded. Which insurance company underwrites the product - and how much is the amount insured. And the following 2 3 4 9 items are all about security guarantee indicators.
2. Heating element: It is the heart of the instant electric water heater. It is called differently by various manufacturers and has many names. The comparisons are thermal efficiency, safety and durability.
3. Control system: gear control/intelligent control. The price of gear control is relatively low, and the original parts such as changing the gear are generally mechanical parts, and the service life is 3-5 years in ordinary household use. It can last up to 8 years if well maintained. Intelligent control generally involves touching the screen to control switches and temperature. The relative price is slightly higher. Intelligent control Many manufacturers have achieved the technology to accurately control the outlet water temperature. Water temperature memory function, automatic switch machine and many other advantages. Depending on the situation, you can choose a brand whose manufacturer promises a product life of more than 10 years.
4. Anti-electricity wall: Some manufacturers call it resistance wall or electric isolation wall. Anti-electricity walls are divided into two types: internal and external. Judging from the current market response, the built-in anti-electricity wall is welcomed by most consumers due to its beautiful appearance and stable performance. In October 2011, the state mandated that electric water heaters must use the national standard external anti-electricity wall. One for water inlet and one for water inlet. Remember not to buy a water heater without an electric wall.
5. Power: Let me first talk about the load of general household electricity (220V). It can be discussed in two aspects.
First, wires, built from 1999 to now It is common sense for users of electric wires in new houses to install more than 10 square millimeters of copper wire, which is absolutely sufficient and can be loaded up to 20KW, so you don’t have to worry. However, the water heater wire must be at least 4 square millimeters of copper wire.
2. Electric meter: There are two common types of household electric meters: one is a 5 (20) A mechanical meter, which can load up to 5600W. There used to be more houses with this kind of electricity meter. The other is a 10 (40) A electronic meter; this meter can load up to 8800W. If the load exceeds the limit, it will trip to ensure the safety of power supply.
6. Energy saving: For example, the electricity price in Shenzhen is 0.6 yuan/KW/h
(For example, in winter when the temperature is relatively low---the water temperature is heated from 5℃ to 45℃--- -3L/min water flow----one person takes a bath for 20 minutes)
Water storage electric water heater 2000W-60L water waiting time 1.4 hours Electricity consumption: 2KW × 1.4 hours = 2.8KW (2.8 degrees) = 1.68 yuan
Water storage electric water heater 3000W-60L water waiting time 0.93 hours electricity consumption: 3KW Electricity consumption for 60L water for 20 minutes: 7.5KW --3L/min water flow----one person takes a bath for 20 minutes
Water storage electric water heater 3000W--60L water waiting time 42 minutes Electricity consumption: 3KW × 0.7 hours = 2.1KW (2.1 degrees)
Install electric water heater 6000W--electricity consumption for 60L water for 20 minutes: 6KW×0.33 hours=1.98KW (1.98 degrees)
(For example, in summer when the temperature is relatively higher-- -Water temperature 25℃, heated to 40℃---3L/min water flow---one bath for 20 minutes
Water storage electric water heater 3000W--wait for 60L water for 42 minutes. Electricity consumption: 3KW×0.7 hours=2.1 KW (2.1 degrees) - the actual use of 30L more water is wasted
Instant electric water heater 3000W----30L water 10 minutes of electricity consumption: 3KW × 0.17 hours = 0.5KW (0.5 degrees). )
Electric water heaters that store water require a long preheating time and require heat preservation. If the heat preservation is not good, the control system will continue to heat, and a large amount of electric energy will be wasted.
The material of the water storage tank also determines the product warranty.
Although the instantaneous electric water heater has a slightly larger power, its use time is short, and the smart product can also intelligently control the power consumption according to the water temperature and water volume, so it saves electricity. The effect is obvious.
7. Water output: When multiple people use it continuously, the amount of water needs to be controlled, and it often happens that the hot water is not enough or the cold water is hot and cold. But the water output can be relatively large.
Although instant electric water heaters are slightly more powerful, they have a short usage time. Smart products can also intelligently control power based on water temperature and volume. Therefore, the power saving effect is obvious. When the inlet water temperature is low, the general water volume is 2.5L-3L/min - when the inlet water temperature is high, the outlet water volume can be appropriately increased to the maximum of 6.5L/min.
8. Volume: As everyone knows, instant electric water heaters do not need to store water. Compact size.
9. Health: Water quality requirements are getting higher and higher, which is the basic requirement of contemporary people’s life:
Storage electric water heaters have been increasingly criticized because they breed a large number of bacteria in warm water. Many people know it. The same goes for including solar/air energy water storage tanks.
Because the instant electric water heater is ready to use, it can minimize the time for bacteria to breed in the water. And the current far-infrared sterilization technology. Mineral spring purification technology has been increasingly used in instant electric water heater products. . .
10. Advertising: Many brands on the market now claim to be imported from abroad or have foreign technology. However, if you often pay attention to national news, you will know that my country’s exports of mechanical and electrical products account for 5% of total exports. Ten or more. And it is increasing year by year. Not only do our water heaters not need to be imported, but they have been exported for a long time! (In developed countries such as Europe and the United States, instantaneous water heaters account for more than 80%)
The final choice depends on the reputation of the merchant and the brand service. Make a choice based on the actual needs of the family. Energy-saving and environmentally friendly tankless electric water heaters are recommended.
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