Frozen Water And Hot Water Integrated Control By The PIC Microcontroller

The course design, frozen water and hot water integrated control, is based on PIC single-chip microcomputer. The frozen water hot water body including three working mode, respectively is hot water mode, frozen water mode, frozen water hot water mode.Hot water model working principle is through the high efficiency compressor doing work, from the quantity of heat of the evaporator absorption by cold media to high temperature water condensation released to the heated in the water, so as to achieve the purpose of hot water. Frozen water model work principle is through the capillary will high temperature and pressure liquid refrigerant into low temperature of low pressure steam liquid mixing cold media, again through the condenser pump will enter into the four-way valve of the frozen water, so as to achieve the purpose of frozen. The frozen water and hot water model work principle that the above two models of the combined action of the results.In addition, this body still uses the water closed-circuit circulation work mode, and the water pipe of water can keep the water tank and the same ideal water temperature, allows the user to open the water out of the water temperature is ideal switch water, without wait. The body of the single chip microcomputer controller is used PIC16F917, through the temperature sensors, water level sensor etc will coil temperature, the hot water outlet temperature, hot water the return water temperature, temperature of cooling water, cooling water, such as the return water temperature water tank input of into PIC microcontroller. The output will pass through a single chip ULN2003AN relay driver modules driving compressors, fan, hot water circulation pump, frozen water cycle pump, four-way valve, gas and evaporation electromagnetic valves, water evaporation electromagnetic valve actuator action, good control of the water tank of water temperature. The water temperature to achieve the ideal effect.Parts of the program, after programmed in MPLAB integrated development environment, Through the IC-prog burning software, will burn to program in single chip microcomputer.