The original refrigeration equipment of xindacool, the selection and efficiency analysis of condensation and evaporation thawing mode in cold environment Part I (44 characters):

The original refrigeration equipment of xindacool, the selection and efficiency analysis of condensation and evaporation thawing mode in cold environment Part I (44 characters): Frosting is inevitable in cold and humid environment; Thawing logic directly affects the production of equipment, and xindacool provides a variety of thawing solutions suitable for low temperature conditions. There are three common thawing methods: planned thawing, temperature thawing and intelligent thawing with pressure difference. Differential pressure defrosting determines the frosting degree according to the air pressure difference on both sides of the heat exchanger, so as to achieve the highest overall efficiency. The planned thawing is triggered at regular intervals, and it will be carried out whether there is frost or not, resulting in unnecessary energy consumption. Compared with differential pressure thawing, thawing needs to consume 35% to 42% more electricity. The temperature thawing is triggered by the temperature threshold of the serpentine tube; Although it is sensitive to the fluctuation of environmental humidity, it is often mistakenly triggered, which increases the thawing time by 20%. Suitable for common scenes with little humidity change. Xindacool's intelligent differential pressure defrosting will only start after actual frosting, thus shortening the defrosting time by 25% to 33%, minimizing the interference to the cooling system and improving the effective duration under cooling conditions. The heat sources of thawing include electric heating thawing and hot air diversion thawing. The latter uses the hot exhaust of the compressor, which reduces the energy consumption by 60% to 70% compared with electric heating. The ambient temperature ranges from-5 C to+5 C, which is easy to form frost, and differential pressure thawing has outstanding advantages. Below-15 C, auxiliary electric heating is needed to ensure full thawing. Under the high temperature condition of T3, almost no frost will form, so the defrosting logic enters the automatic pause mode and automatically locks the defrosting output on the controller, thus preventing accidental startup and power waste. Thawing will temporarily interrupt the cooling output for 3 to 12 minutes. By controlling the thawing time, the effective operation rate of the equipment under cold conditions can be improved to more than 91%. The third-party test can simulate the glacier environment, evaluate the whole thawing cycle, and record the total energy consumption and the proportion of residual glaciers. If the residual frost content is less than 8%, it is considered satisfactory. Thawing logic can be customized through ODM, which can modify the activation threshold and maximize the frost protection time. The audit period is 3-5 working days, and there is no need to modify the switch hardware. N+1 system allows thawing in stages and distributes thawing time among different units to ensure continuous operation without system interruption or shutdown. In the thawing stage of EC fan, it can automatically slow down to reduce the entry of cold air and reduce the heat loss in the process, thus further shortening the thawing cycle by about 15%. The technical manual provides complete thawing parameters, including the critical value of pressure and temperature difference and the longest frost-proof time, which is convenient for maintenance personnel to make accurate adjustments on site. Double customization for explosion-proof cryogenic system: the electric heating components used for thawing must be explosion-proof certified. The comprehensive verification of all electrical components has increased the total delivery time by 18 to 24 working days. FAQ 1。 Is it necessary to install differential pressure sensor for differential pressure thawing? Yes, physical sensors are needed to collect data about the pressure difference between the inlet and outlet of the heat exchanger. 2. Can hot air be used to thaw under any operating conditions? The exhaust temperature of the compressor under load is insufficient; At low temperature, auxiliary electric heating is needed. 3. Will the equipment not be completely cooled during thawing?