What are the classifications of water heaters? How to choose a domestic water heater?
With the improvement of people's living standards, people's comfort requirements in family life are getting higher and higher, and the various electrical products that come with it are convenient for human life. Among them, water heaters are one of the most demanding appliances. In order to meet the needs of different groups of people, there are more and more types of water heaters, and it is also difficult for consumers to purchase. So what are the classifications of water heaters? How to choose a domestic water heater? The following decoration house decoration network Xiaobian will bring you water heater classification, purchase and brand for your reference.
What are the classifications of water heaters?
According to the principle of hot water, water heaters can be mainly divided into electric water heaters, gas water heaters, solar water heaters, and air energy water heaters. Gas water heaters are the earliest water heater products; electric water heaters are currently the most widely marketed products; solar water heaters are welcomed for their good energy efficiency; air energy water heaters are relatively new products, and the market penetration rate is not high.
1. Electric water heater: An electric water heater refers to a water heater that uses electricity as an energy source for heating. The basic working principle is to complete the heating and non-heating behavior after the thermostat is energized and de-energized. After the circuit is connected, if the water temperature is lower than the critical temperature of the water heater, the thermostat is automatically turned on, the water heater starts to heat up, and when the water temperature reaches the preset temperature of the water heater, the thermostat is disconnected, and the electric water heater stops heating. According to the heating power, electric water heaters can be divided into three types: water storage type (also known as volumetric or heat storage type), namely hot type and quick heat type (also called semi-storage type).
2, gas water heater: gas water heater, also known as gas water heater, it refers to the use of gas as a fuel, through the combustion heating method, the heat is transferred to the cold water flowing through the heat exchanger, in order to achieve the purpose of preparing hot water Appliances. There are many types of gas water heaters. According to the gas type, they can be divided into gas, natural gas, liquefied petroleum gas and biogas water heaters. According to the water control, they can be divided into pre-type water heaters and post-type water heaters. According to the water supply pressure, they can be divided into low pressure and medium pressure. And high-pressure water heaters; according to the exhaust method can be divided into straight-row water heaters, flue-type water heaters, strong-discharge water heaters and balanced water heaters.
3. Solar water heaters: Solar water heaters are heating devices that convert solar energy into heat energy, heating water from low temperature to high temperature to meet the hot water use of people in life and production. Solar water heaters are divided into vacuum tube solar water heaters and flat panel solar water heaters according to the structure, mainly vacuum tube solar water heaters, accounting for 95% of the domestic market share. The vacuum tube type domestic solar water heater is composed of heat collecting tubes, water storage tanks and brackets and other related spare parts. The conversion of solar energy into heat energy mainly depends on the vacuum heat collecting tube, and the vacuum heat collecting tube utilizes the principle of hot water floating on the cold water sinking to make the water generate microcirculation. Get the hot water you need.
4, air energy water heater: air energy water heater, also known as "air source heat pump water heater." The "air energy water heater" absorbs the low-temperature heat in the air, is vaporized by the fluorine medium, and then is pressurized by the compressor, then pressurized and heated, and then converted into water by the heat exchanger, and the high-temperature heat after compression heats the water. The air energy water heater has the characteristics of high efficiency and energy saving, and the same amount of hot water is produced, which is 4-6 times that of the general electric water heater, and its annual average heat efficiency ratio is 4 times that of electric heating, and the energy efficiency is high.
How to choose a domestic water heater?
1, electric water heater purchase points:
(1) Capacity selection: Firstly, the capacity of the electric water heater should be determined. The choice of the capacity of the electric water heater depends mainly on factors such as the family population and the amount of hot water. Generally speaking, if one person is used for bathing, the electric water heater with a capacity of 30-40 liters can be selected; for 2-3 people, the 40-50 liter electric water heater should be purchased for continuous bathing; for 3-5 people for continuous bathing, 70 is required. -100 liter electric water heater. In addition, the larger the size of the external size is generally larger, so it is also necessary to consider the size of the installation space.
(2) Liner material: The inner tank is the key part of the storage type electric water heater. It can be said that it is the “heartâ€. The performance and quality of the inner tank directly determine the service life of the storage type electric water heater. At present, there are three types of electric water heaters on the market: galvanized liners, stainless steel liners, and enamel liners. From the aspects of anti-corrosion, heat preservation and service life, the enamel liner is the best.
(3) Safety The electric water heater is used as a power product, and its safety directly determines the personal safety of the user. At present, our electricity consumption environment is still not very satisfactory. There are often accidents in which electric water heaters leak electricity and hurt people. The electric water heater leakage protection is extremely important. At present, the anti-electric wall technology is a relatively reliable anti-leakage protection measure, and this technology has been included in the new national standard for electric water heaters. When purchasing, check whether the product has safety technology such as anti-electric wall.
(4) Energy efficiency and energy saving: The electric water heater is used frequently, and the energy-saving water heater is more economical. The energy efficiency rating system of water storage type electric water heaters has been implemented. According to the regulations, all kinds of water storage type electric water heaters should be labeled with energy efficiency stickers. The energy efficiency rating of water storage type electric water heaters is divided into 1-5 levels, of which level 1 is the highest, level 2 is the second, level 5 is the lowest, and the energy efficiency limit value is the threshold for market access. Products below level 5 will not be available. Market sales.
2, gas water heater purchase tips:
(1) Gas type selection: To purchase a gas water heater, you must first purchase a water heater that matches the type of gas used in your home. Consumers need to find out what kind of gas source your home uses. Gas water heaters are available in natural gas, artificial gas and liquefied petroleum gas. "T" stands for natural gas, "R" stands for artificial gas, and "Y" stands for liquefied gas. Natural gas and artificial gas are transported by pipeline. Most of the liquefied petroleum gas is canned, commonly known as gas. Therefore, the gas should be determined before selecting the water heater.
(2) Capacity selection: At present, the water output of gas water heaters on the market is generally 6-12 liters, that is, 6-12 liters of water with an output temperature rise of 25 degrees Celsius per minute. For example, if the tap water temperature is 20 degrees, it can output 6-10 liters of water per minute of 20+25=45 (degrees Celsius). Generally speaking, the amount of water is larger and it will be more comfortable to wash. Therefore, it is recommended to choose a water heater with a water output of 8 liters or more. If you have two bathrooms in your home or you need a bathtub, you can choose a large number of water heaters.
(3) Look at safety performance: At present, the main exhaust methods on the market are strong row and balanced. The forced-discharge type water heater has a blower inside the body, which can forcibly discharge the exhaust gas generated by combustion out of the room (provided that the installation environment and the outside air flow better). Balanced, it is the only gas water heater that can be installed in the bathroom. Under the action of the fan's pumping force, the balanced air is extracted for combustion, and the exhaust gas is forcibly discharged outside, so it is the safest type among all gas water heaters.
(4) Look at thermal efficiency: The national standard stipulates that the thermal efficiency of gas water heaters is mainly divided into three grades. The first level is more than 96%, and the general condensing water heater can reach this energy efficiency standard. The condensing water heater has a very high thermal efficiency because the heat in the exhaust gas discharged from the combustion of the gas is recycled twice. In addition, the secondary level is 88% or more, and the third level is 84% ​​or more. The higher the thermal efficiency, the more energy efficient.
3, solar water heater purchase method:
(1) Look at the vacuum tube: At present, there are two kinds of vacuum tubes on the market, one is made by using a gradual film process. The other is manufactured by the internationally leading patented interference film technology, which is a waterless vacuum tube, which is heated by a heat transfer medium. At present, some large enterprises have produced anhydrous solar energy. This kind of solar energy does not produce stagnant water, and it does not produce nitrite. The water temperature can reach 99 degrees. The latter is a substitute for the former, with "high temperature resistance, high cold resistance, and more Efficient and other features.
(2) Look at the insulation layer: The insulation layer is the part between the outer skin of the water tank and the inner tank. The performance of the insulation layer directly affects the actual amount of hot water available for solar energy. The good water heater adopts imported high-quality polyurethane, which has low thermal conductivity, high strength, good elasticity, low temperature resistance, easy forming and good heat insulation effect. The cell is evenly distributed, the thermal conductivity is low, and the thermal insulation effect is the best.
(3) Look at the liner: The tank liner of the water heater works for a long time in a hot water environment, and the liner should have sufficient strength and durability. The good water heater brand adopts the imported thickened SUS304 stainless steel, and the inner tank treated by the automatic argon arc welding equipment with high temperature resistance not only has obvious corrosion resistance, but also has stable and stable working performance and long service life under high temperature conditions.
4, air energy water heater purchase Raiders:
(1) Pay attention to the quality of core components: The quality of the core components of air-energy water heaters determines the quality of the products. For air-energy water heaters, compressors, coil materials, tank liners, etc. are the most critical factors related to product quality. The compressor brand is better known as an internationally renowned manufacturer, and it is best to use a special heat pump compressor; the coil material is preferably a gold steel heat exchanger, which can effectively ensure the thermal conductivity and service life of the pipeline; The steel special inner liner is the best.
(2) Pay attention to product energy efficiency: The standard stipulates that the energy efficiency ratio of household air energy products in standard environment is not lower than 3.4; the energy efficiency ratio of circulating heating is not lower than 3.7. This should be noted when purchasing an air-energy water heater, otherwise the product may be considered a substandard product. In addition, the real air-energy water heater does not have any electric auxiliary heating, otherwise the energy-saving performance will be greatly reduced.
(3) Select brand products to pay attention to after-sales: At present, household air energy products on the market usually implement three-year repair and three-year replacement of water tanks. Since the normal service life of air energy water heaters is as long as 12-15 years, it is recommended to give priority to the purchase of well-known brand products with guaranteed after-sales. For different brands of products, you can choose through the above different points and comprehensive comparison of cost performance.
What brand of household air conditioner is good?
1. Haier (Haier Group Company, started in 1984, the world's leading provider of complete home appliance solutions, the top 500 Chinese enterprises, the household appliance enterprise group that started the production of refrigerators)
2. AO Smith (Ao Smith (China) Water Heater Co., Ltd., founded in 1874, American hot water expert, advocate of home central heating system, leading water heater manufacturer)
3. Midea (Mei Group Co., Ltd., started in 1981, world-class white goods manufacturer and brand, world top 500 companies, large-scale comprehensive enterprise groups, listed companies)
4. Ariston (Ariston Thermal Products (China) Co., Ltd., founded in Italy in 1930, is a global leader in the production of heating and hot water products, multinational companies)
5, Wanhe (Guangdong Wanhe New Electric Co., Ltd., listed company, the first to introduce multi-energy complementary integrated hot water system, leading gas appliance / domestic hot water system supplier)
6, Wanjiale (Guangdong Wanjiale Co., Ltd., founded in 1988, the main drafting unit of gas water heater standards, professional R & D / production / sales of gas water heaters / gas stoves and other products)
7. Sakura (Sakura Kitchen (China) Co., Ltd., founded in 1978 in Taiwan, Jiangsu Province famous trademark, kitchen equipment industry standard drafting unit, kitchen and bathroom / range hood / water heater top ten brands)
8. Ao Shuai (Shaoxing Aoshuai Electric Co., Ltd., a well-known integrated kitchen appliance brand in China, a low-altitude smoke-free stove, a healthy kitchen trend pioneer, a large-scale integrated kitchen and bathroom appliance company)
9. Siemens (Bosi Household Appliances (China) Co., Ltd., founded in 1847 in Germany, a world-renowned home appliance brand. In 2015, Siemens Home Appliances became a brand of Bosch Group)
10, Shuaikang (Shuaikang Group Co., Ltd., founded in 1984, China's high-end kitchen and bathroom appliances, the main hood / gas stoves and other kitchen appliances, range hood industry drafting unit)
The above is what classification of water heaters brought to you by Xiaobian? How to choose a domestic water heater? For the whole content, I believe that everyone has a basic understanding of water heater purchase after reading this article. If you want to know more about decoration consultation, please click to enter the decoration knowledge channel.
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How to install a gas water heater? Gas water heater installation steps
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