Application scheme of electric heating boiler Controlled by Coolmay EX3G series HMI / PLC all in one

Release date:2020-05-20

Key words: Coolmay HMI/PLC all in one Electric heating  Boiler

Model:EX3G-70KHA-4AD-PT

Abstract:The principle of electric heating is that the resistance wire is energized and heated, the electric energy is converted into heat energy, the heat energy is introduced into the water, the water is heated into hot water, the hot water circulation pump assists the circulation boiler and the hot water in the heating pipe, and the purpose of heating is realized through the radiator. According to the principle of constant temperature and energy saving optimization, with the change of water temperature, the temperature control, logic operation and digital chip control adjustment are continuously carried out by using Coolmay control system to achieve automatic temperature control and heating.

. The principle of electric heating

The resistance wire is energized and heated, the electric energy is converted into heat energy, the heat energy is introduced into the water, the water is heated into hot water, the hot water circulation pump assists the circulation of the hot water in the boiler and the heating pipe, and the heating purpose is achieved through the radiator.

. Advantage

Compared with gas boilers and oil-fired boilers, electric heating boilers do not need to be equipped with fuel oil tanks, no gas pipelines are required, and there is no expensive gas opening cost. Compared with coal-fired boilers, electric heating boilers do not need a furnace, no need to set up coal yards, no need Paying pollution fees to the environmental protection department, and will not be harassed by neighboring residents; if using low valley electricity, the operating cost is more economical than coal-fired boilers.

. Control system

It is equipped with HMI/PLC all in one to control the normal operation of electric heating furnace, and realize the intelligent, automatic and humanized performance of boiler. It has high stability, rich functions, simple operation, convenient use and flexible control. Etc.

Powerful, with boiler water temperature control, boiler water level display, water shortage protection, over temperature protection, built-in digital electronic clock, continuous or timing (4 time period) operation control and many other automatic display and control functions.

The boiler operation adopts the principle of blood circulation, combined with a special integrated machine, through the temperature sensor, constitutes a circulation regulation system. According to the principle of constant temperature and energy saving optimization, with the change of water temperature, the control system continuously performs temperature acquisition, logic operation and digital chip control adjustment, so as to achieve automatic temperature control and achieve heating.

. Configure high-end

(1) The touch screen can be displayed in English, with rich display function, accurate and intuitive to the boiler's running status and collected circulating pump working status, heater working status, furnace water temperature, water level status, current time, alarm information, etc. show. Simply click on the touch screen to set the operation, and check, set and modify various adjustment parameters to achieve human-machine dialogue, easy to understand, easy to learn, easy to remember, simple and convenient to operate;

(2) The controller has a built-in digital clock. The system can arbitrarily set the opening and closing time in 4 time periods according to the user's requirements, saving power loss and reducing boiler use cost;

(3) The heater adopts ceramic electric heating rod, which has low surface heat load, long service life and uniform thermal efficiency. The "electrical wall" mode of water and electricity separation and heating, to prevent leakage safety hazards, and easy to disassemble, easy to check and repair. The stainless steel electric heating tube and the furnace body are flanged for easy disassembly, installation, convenient maintenance and maintenance (stainless steel electric heating tube type);

(4) The boiler is equipped with a temperature sensor to control the temperature adjustment of the electric heating furnace;

(5) HMI/ PLC all in one and mobile phone APP combined, synchronous control, real-time feedback, more convenient.





. The design is reasonable

1. High-power electric copper busbar connection, the outgoing cable is the national standard copper core cable, with large load bearing, good insulation and durability.

2. The boiler has many protection functions such as water shortage, over temperature, short circuit, leakage, phase loss, over current, etc. The boiler operation is more stable and safe.

3. The boiler can be connected to a large-scale hot water storage tank. The nighttime low-valley electricity is used to heat the water to 95 °C for heat storage and storage. During the daytime, heat is exchanged by heat exchangers to heat the grid, which plays a role in cutting the peaks and valleys. economic.

4. aluminum foil thick glass surface for insulation, less heat loss, better insulation effect.

5. the overall fast loading factory, mechanical and electrical integration, white color plate, beautiful appearance, not easy to rust.

. Comprehensive features

1. Using HMI/PLC all in one, the operating status of the boiler is clearly visible. All operations are easily accomplished by simply clicking on the touch screen, and the boiler controller's super display and control functions are complete.

2. The ceramic electric heating tube type hot water boiler adopts the electric heating mode of "water and electricity separation" to completely separate the electric heating tube and the furnace water. The boiler is safe and convenient to repair and replace the heating tube; the stainless steel electric heating tube type hot water boiler is implemented. "Immersion type" electric heating method, the furnace water is heated quickly and the efficiency is high, and the heating pipe is connected with the furnace body flange type, which is easy to clean and replace.

3. The user can set the water temperature arbitrarily between 30 °C and 90 °C. The boiler can automatically supply heat to the heating circulation system according to the user's requirements, and provide hot water for bathing and living.

4. The boiler adopts the step-by-step time-sharing method to control the heating group. The heating group can randomly input or stop the work according to the load change, and obviously reduce the impact on the power grid. At the same time, it is also possible to manually start and stop the number of heating sections, so that the user can adjust the boiler electric power by himself.

5. The control system controls the start and stop of the circulating pump according to the temperature of the furnace water. The hot water boiler is used for heating, the hot water circulation pump starts when the furnace water reaches the set upper limit water temperature, and the hot water circulation pump stops when the water temperature is lower than the set lower limit water temperature; the hot water boiler is used for bathing, and the hot water circulation is reached when the furnace water reaches the set upper limit water temperature. The pump stops and the hot water circulation pump starts when the water temperature is lower than the set lower limit.

6. using advanced centrifugal glass fiber silk cotton multi-layer insulation, less heat loss, energy saving; famous white color plate beautifully packaged, beautiful appearance and rust resistance.

7. The boiler has leakage protection function (the control system automatically cuts off the boiler power supply after detecting the leakage of the power supply), and the anti-drying extremely low water level protection function (when the water level is lower than the set minimum limit water level, immediately stop and alarm), furnace Body overheat protection function (when the boiler shell temperature exceeds 105 °C, immediately stop and alarm, the boiler automatically starts after the temperature is normal), the temperature sensor abnormal protection function (the control system continuously detects the sensor condition, immediately stops and alarms), the power supply voltage abnormal protection function (When the power supply is abnormal, it will automatically power off. After normal, it will automatically resume work), and the heating component will be phase-protected (after monitoring the phase loss of the heating component, stop the protection).

8. The top of the boiler is provided with an exhaust port that communicates with the atmosphere. The inner tank is not under pressure. The boiler works under normal pressure without any explosion hazard, completely eliminating safety hazards.

9. Symmetrical design of the outlet and return water inlet (double inlet and double outlet), suitable for quick connection installation; boiler electromechanical integration, compact and reasonable body, convenient transportation.

. Main components

The main components of the electric heating boiler are EX3G HMI/PLC all in one (it is the core component of the boiler control system, all functions rely on it), electric heating pipe (heating parts, its quality directly determines the operation of the boiler) Maintenance cost), the boiler body (strict pressure test and pressure must be carried out before leaving the factory to prevent leakage).

. Operating costs

Calculation formula of heating operation cost of electric bunker of one square meter in the whole heating period: heat load per unit area * heat load coefficient * daily working hours of electric boiler * days of heating period * unit price of electric electricity = electric boiler heating cost per unit area of heating period. Electric boiler heating operation status can be divided into the following types:

1. The user is at home for a long time, and the electric boiler heating furnace is continuously operated for 24 hours. In order to save operating costs, the heating temperature of the electric boiler at night is appropriately lowered. Electric boiler heating costs are: 0.06kw / square meter * 0.6 × 10 hours * 140 days * 0.48 yuan / degree = 24.2 yuan / square meter;

2. office workers, electric boiler users only at noon, at night, electric boiler heating furnace intermittent operation in 3 periods. Electric boiler heating costs are: 0.06kw / square meter * 0.6 * 6 hours * 140 days * 0.48 yuan / degree = 14.5 yuan / square meter;

3. office, 5 days working system, electric boiler only heating from Monday to Friday, electric boiler heating furnace running during the day, the rest of the time electric boiler running in anti-freeze state. The heating cost of electric boiler is: 0.07kw/m2 * 0.6 * 6 hours * (140 days * 5/7) * 0.48 yuan / kWh = 12.1 yuan / square meter;

4.the school, electric boiler in addition to the five-day work week, there is a 35-day holiday, electric boiler heating time is relatively short. The heating cost of electric boiler is: 0.07kw/m2 * 0.6 * 6 hours * [(140 days - 35 days) * 5/7] * 0.48 yuan / kWh = 9.1 yuan / square meter with the above calculated value * actual heating area of the room ( The utility area can be used to calculate the operating cost of the electric boiler during the entire heating period;

If the electric boiler user reasonably adjusts the electric boiler or closes the electric boiler heater that does not need the electric boiler heating room (such as idle rooms, restrooms or kitchen), the actual heating area of the electric boiler will be reduced accordingly, and the heating cost of the electric boiler will be reduced accordingly.