What should be paid attention to in the purchase a

2022-07-22
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Due to safety, rising gas prices and other factors, the status of traditional gas water heaters has been affected in the market, and new electric water heaters have been replaced. As it has the advantages of long service life, high efficiency, energy conservation, safety, environmental protection and so on, it is immediately sought after in the market. Let me show you what you should pay attention to in the purchase and use of heat storage electric water heaters

due to safety, rising gas prices and other factors, the position of traditional gas-fired water heaters has been affected in the market, and new electric water heaters have been replaced. As it has the advantages of long service life, high efficiency, energy conservation, safety, environmental protection and so on, it is immediately sought after in the market. Let me show you what you should pay attention to in the purchase and use of heat storage electric water heaters

water storage electric water heaters are divided into open and closed types. The early water storage electric water heaters were mostly open or open type, with simple structure and small volume. They relied on the pressure spray suspended from a high place, and the water flow was small, but the price was low. They were suitable for families with a small population and not very rich families who only used for bathing. The electric water heaters on the domestic market are mainly closed water storage electric water heaters, which do not need to be installed in separate rooms, do not produce harmful gases, are clean and sanitary, and can be easily adjusted

classification of water storage electric water heaters

electric water heaters are divided into three types: mechanical, digital display and numerical control according to their different methods of water heating temperature control

1. Mechanical control electric water heater

the main element of temperature control of mechanical electric water heater is a mechanical control electric water heater - a temperature controller adjusted by a mechanical knob. The temperature controller is usually composed of a temperature measuring probe, an adjustable drive mechanism and a pair of electrical contacts. When the temperature at the probe rises, the medium (liquid or gas) in the probe expands and drives the driving mechanism through the capillary to make the electric contact act. The action temperature of the electric contact can be adjusted by the adjustable driving mechanism or the electric contact can be in the normally open state

2. Digital display control electric water heater (SX)

the control system of digital display electric water heater is usually composed of display board, main control board, strong current board and temperature sensor

the information of temperature, setting temperature, fault code and timing number can also be set by using the keys and knobs on the control panel. The main control board is the core of the control system, which is used to process the temperature information and control the operation process of the water heater. The strong current board is used to provide the power supply required by the system, implement strong current drive and leakage detection. The temperature sensor is used to collect temperature information

3. Numerical control electric water heater (SK)

numerical control electric water heater electric water heater is composed of display board, main control board, strong current board and temperature sensor. The LCD display on the display board is used to display the working mode, heating state, current temperature, setting temperature, setting menu, clock, timing period, fault code and other information, and can also be set by using the keys on the board. The main control board is the core of the control system. The over temperature detection and normal temperature detection temperature sensors are used to collect temperature information

so how to choose and buy water storage electric water heaters

electric water heaters are divided into three types: wall mounted horizontal, wall mounted vertical and floor mounted. The wall mounted horizontal water heater is horizontally hung on the wall during installation, which is suitable for water heaters with a capacity of no more than 100L, and has certain strength requirements for the wall

1. Select capacity

the capacity of the water heater is in liters. The larger the capacity, the greater the heating capacity of the water heater. Users can choose the capacity of the water heater according to the purpose, household population and water usage habits. Water heaters of less than 15L are generally used for washing dishes and vegetables in the kitchen or washing faces and teeth in the washroom. The water heater used for bathing should have a capacity of more than 40L, and one person can use it: 40~50l; For 2 people: 50~60l; Family of 3: 80 ~ 100L; For families with more than 3 people, it is suitable to choose a water heater with more than 120L; If you are used to bathing in a bathtub, you'd better choose a water heater of more than 150L

2. Select power

the power of the water heater is in watts (W) or kilowatts (kw), which usually refers to the power of the electric heating pipe in the water heater. The higher the power, the more heat generated per unit time, the less heating time required, and the higher the load requirement of the wire. When choosing an electric water heater, users should know the power of the electric water heater. The choice of power should be mainly determined by the cross-sectional size of your home meter and power line

3. Performance selection

(1) liner

liner is the core component of water heater, which directly affects the safety performance, service performance and working life of water heater. When choosing a water heater, users should be concerned about whether the steel plate in the water heater is made of titanium alloy, whether the thickness is thick enough, whether the welding process is advanced and reliable, whether the quality of enamel is guaranteed, and whether the enameling and sintering process is advanced

(2) electric heating pipe

the quality of electric heating pipe is directly related to the safety of water heater. Therefore, when choosing a water heater, in addition to the power of the electric heating pipe, it is more important to care about the electrical performance of the electric heating pipe

(3) magnesium anode rod (magnesium rod)

magnesium is the metal with the lowest potential in the electrochemical sequence and is physiologically non-toxic. Therefore, it is ideal to make magnesium rod protective liner. The size of the magnesium rod is directly related to the length of time to protect the bladder and the size of the protective effect. The larger the magnesium rod, the better the protective effect and the longer the protective time

(4) selection of insulation layer

the quality of the insulation layer of the water heater directly affects the insulation performance of the water heater. The main factors that determine the insulation performance are the insulation material and thickness. Commonly used insulation materials include asbestos, sponge, foamed plastic, polyurethane foam, etc. Among these thermal insulation materials, polyurethane foam has the best thermal insulation performance, followed by foamed plastic. Asbestos and sponge are generally only used as auxiliary thermal insulation materials for water heaters because they are difficult to closely fit with water heaters

(5) selection of backflow prevention technology

in order to prevent the electric rod from dry burning due to external water cut-off, all electric water heaters adopt backflow prevention technology. The anti backflow technology adopted by most manufacturers is realized by selecting the safety valve with check function (commonly known as the cored safety valve). But the problem of this technology is: when the water heater is working, due to the thermal expansion and contraction of the water in the tank, some water will be discharged into the pipeline through the internal leakage function of the valve core; At the same time, the internal leakage function of the safety valve often fails due to incrustation, which increases the working pressure of the tank and reduces the service life of the water heater

the relevant information about the thermal storage electric water heater is introduced here. I hope this article will be helpful to you. If there is anything else you don't understand, you can leave a message to Xiaobian below, and we will answer it for you as soon as possible

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