According to the heating power, electric water heaters can be divided into three types: water storage type (also known as volumetric type or heat storage type), namely heating type and fast heating type (also known as semi water storage type); Water storage type is the main form of electric water heater.
According to different installation methods, it can be further divided into vertical type, horizontal type, floor type, trough type, and the latest integrated type with bathroom cabinet. According to whether it is under pressure or not, it can be divided into open type (simple type) and closed type (pressure type). According to the way of use, it can be divided into household and commercial.
1、 Water storage type of electric water heater
According to the installation method, it can be divided into wall mounted (horizontal) electric water heater and floor mounted (vertical) water heater. The volume of wall mounted electric water heater is usually 40l-100l, and floor mounted water heater is usually more than 100L. Household water storage electric water heater has the characteristics of easy installation, large water output and stable water temperature, but the traditional water storage electric water heater has slow heating speed and long waiting time.
There are many brands of water storage electric hot water, and their quality varies greatly. Most customers are non professionals, so it is difficult to identify them. Experts remind consumers that the most important part of the water storage electric water heater is the inner tank, which is related to the performance and service life of the water heater. Customers must pay attention to the material of the inner tank and the performance of anti-corrosion and anti scaling when choosing.
2、 Instant type of electric water heater
Instant electric water heater (also known as fast heating electric water heater in the industry) generally needs 20 or even more than 30 amperes of current, which can be turned on and heated immediately, with constant water temperature, high heating efficiency and small installation space. Internal low-pressure treatment, can be installed when the increase in shunt, high-power products installed in the bathroom, that can be used for shower, can also be used for washing, general household use, energy saving and environmental protection. According to the market demand, the hot water heater is further divided into shower type and kitchen type.
3、 Fast heating type of electric water heater
This is an independent category of electric water heater product which is different from water storage type and instant heating type“ The main features of "fast heating electric water heater" are as follows:
1. Capacity: 6l-30l;
2. Power: 3500w-5500w;
3. Power cord: 2.5-4mm2;
4. Heating time: 3 - 8 minutes;
5. Working mode: once preheating, hot water can be continuously supplied, no limit on the number of users;
6. Constant temperature mode: mechanical constant temperature, automatic intelligent constant temperature;
7. Other functions: anti dry burn protection, anti scald protection, anti overtemperature protection, physical anti electric shield, anti splash body, anti leakage protection, water and electricity separation, magnetic induction protection, overpressure protection, water cut-off and anti backflow protection, and power-off memory function.
The main fast heating water heaters are: pre dual mode electric water heater, 3D fast thermal water heater and intelligent capacity increasing electric water heater.