The winter in the northeast is cold, but the interior is like spring, which is due to electric heating. But most of today's use is direct heating electric heating, there is no heat storage function. Nowadays, it has become a heat storage electric heating system, which not only can not compete for electricity during the peak period of electricity consumption, but also can enjoy the lowest price of electricity in the trough and achieve a win-win situation. This paper introduces the control circuit diagram of two kinds of self-made heat storage electric heaters. You can compare them and choose one that is more suitable for you to save money and save electricity.
The heat storage technology refers to the technology that converts the low-priced electric energy into heat energy and uses it when the electric appliance is used in low-altitude electricity, so that the user can use it all the time to save the running cost.
In recent years, many cities across the country have implemented flat and valley time-of-use electricity prices. The beneficiaries of this policy are heating users. Every year from November 1st to March 31st of the next year, electric heating users can enjoy the low valley period, which is 50% discount from 22pm to 6pm. The electricity price is calculated at 50%. The heat storage electric heater is automatically turned on at 10 o'clock every night, and the heat is stored while dissipating heat. The electric power is automatically turned off at 6 o'clock the next day, and the heat stored at night is released, and no power is consumed during the day.
At present, most electric heating users still use direct heating electric heating, and there is no heat storage function. Experts expressed concern about this status quo, and suggested that users switch to thermal storage electric heating, not only can not compete for electricity during peak hours, but also can enjoy the lowest trough price concessions to achieve a win-win situation.
For the residents to use electricity, the implementation of the power supply and time-sharing pricing policies for the Ping and Gu, has become one of the trends in the formulation of electricity tariff policies by relevant domestic departments. Many provinces and municipalities have begun to implement this policy.
The control principle of the storage heat and heat heater is shown in the figure above. In the figure, the input temperature control circuit is constituted by the time control switch T and the temperature controller ZK. T is a G316T-2 type microcomputer time switch with working voltage of 220V/50Hz and rated current of 25A. It is set by manual segmentation to control the power-on time and power-off time of the heat storage electric heater. Reliable, easy to operate, long service life and so on. ZK is an ECO type 0 °C ~ 300 °C temperature controller, the temperature sensor Pt is placed in the heat storage brick of the heat storage electric heating, adjust the transfer switch ZK to the set temperature value, the power indicator light H lights up. The output control circuit is composed of R1, RP, C1, R2, VD and VS. The stepless temperature adjustment can be realized by changing the conduction angle of the thyristor VS by phase control. Resistor R1, potentiometer RP, capacitor C1 form a phase shifting circuit, and R2 is a current limiting resistor triggered by thyristor VS. The current is charged to C1 through R1 and RP. The conduction angle of thyristor VS is determined by the charging time constant of C1. Changing RP can change the charging time constant of C1, that is, changing the conduction angle of VS, which also changes the load storage heat electric heater. The terminal voltage on the RF tube is electrically heated, thereby changing the magnitude of the RF current.
In the above figure, the component RF is a dry-burning electric heating tube (220V/1500W), which is placed in the heat preservation compensation made of lightweight refractory insulation brick. The heat storage electric heating casing is made of 1mm thick stainless steel plate. When assembling, a layer of rock wool insulation layer is added between the outer layer of the thermal insulation zhuan and the iron box: the double thyristor VS is plastically sealed with 25A/600V and an aluminum radiator is installed.
In this example, 1500W heat storage electric heating is used. The GONG layer can be heated from 14 square meters to 16 square meters. The room temperature can be adjusted from 16 °C to 22 °C. If the area is large, you can choose 2000W, 2500W or 3000W. Equal-power storage heat and power heaters.
The second method of self-made heat storage electric heating is shown below. The second method is simpler than the first method, uses less electrical components, is easy to manufacture, and has the same effect.
working principle:
Turn on the G316T-2 microcomputer time control switch, and set the manual grading time to control the heating and heating time of the heat storage electric heating RF (such as setting the heating time of the heat storage heating and heating at 22 o'clock on the same day to 6 o'clock on the second day). The hour hand rotates the ECO temperature controller turntable to the set temperature value (such as 80 ° C), closes the electric heating control well shuts off S, and the heat storage electric heating electric heating tube RF is energized and heated, and the signal indicator LED lights up. The lightweight refractory bricks in the heat storage electric heater start to store heat and release heat. When the temperature of the heat storage brick of the heat storage electric heater reaches the set temperature value of the temperature controller, the temperature value measured by the sensor Pt is converted into mechanical energy. The contact of the thermostat ECO is disconnected, the electric heating tube RF is powered off to stop heating, and the LED is extinguished. During the working time set by the G316T-2 microcomputer, the temperature is working. When the temperature inside the heating heater is lowered, the ECO thermostat is turned on again, the RF is energized and the LED is lit. Repeat this way to keep the RF at a constant temperature. When the working time of the electric heater reaches 6 o'clock the next day, the output of the G316T-2 microcomputer time control switch is cut off, so that the electric heater stops working, and the stored heat begins to gradually release to the outside for heating.
Regarding the effect of using heat storage and heating for heating, "Shenyang Evening News" made a detailed report on October 12, 2004. The article reported: "Experts have calculated an account, if using energy storage electric heating, a heating period If the heating fee is equivalent to the indoor area, the maximum cost per square meter is 12 yuan. It is much lower than the heating cost required by the traditional heating method, and the direct heating type electric heating is about 30 yuan per square meter."
Self-heating method of heat storage electric heater:
The electric heating tube RF can be purchased from the electronic market at 380V/1500W, and it is reduced to 220V electric heating. The shape is "U" type or "M" type. This article adopts the "M" type. The refractory bricks are made of lightweight refractory bricks of 1.5kg each, and the bricks are light and soft and the groove size is 235mm & TImes; 12mm & TImes; 65mm. The chassis (housing) of the heat storage electric heating is purchased from Shanghai Hongxin Electric Appliance Factory and Shanghai Zhengbao Electric Appliance Co., Ltd. 220VA, 1500W ~ 2000W electric heater, the external size is 600mm & TImes; 650ram & TImes; 180mm, the electric furnace wire is removed.
When making, first take 4 refractory bricks into a rectangular shape, place the "M" type electric heating tube on the brick, engrave the groove according to the shape of the electric heating tube, put it into the electric heating tube, and press it with another 4 pieces. The wire will hold 8 bricks, and the electric heating core will do well. Then put the movement into the chassis, first put two refractory bricks at the bottom of the chassis, put the movement on top, then put two bricks in the upper part of the movement, put 12 refractory bricks in the whole cabinet, weight 18kg . On the uppermost brick of the movement, a circular hole of φ4mm is drilled flat, and a depth of 240mm is used to insert the temperature probe. Then connected to the control circuit, a storage thermoelectric heater was successfully produced. The cost of making a thermal storage heater is only 200 yuan, while the purchase of the same capacity of thermal storage helium is 2,000 yuan.
It is very important to make safe electricity storage for heat storage and electric heating, because the refractory brick is insulated. When installing, put the lead of the electric heating tube on the refractory heat-resistant insulating wax cloth sleeve, and connect the ground wire to the chassis. Do a good job of fire prevention and leakage prevention.
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