First of all, you need to check whether it is a flat wall mounted solar water heater or a built-in vacuum tube. If it is wall-mounted, it uses thermal fluid. If it is an integrated solar water heater. is not hot, you need to check whether the vacuum tube is damaged and does not absorb heat. Check the actual water temperature and the instrument displays whether the temperature is constant, check whether the vacuum tube is blocked, whether there is too much dust. , etc.!
Recommend "Dr. Sun" solar energy and Sancang solar energy (no need for water level probes and solenoid valves). Heating and hot water usage rates are fast in rainy weather, as is after-sales service. The rate is also significantly reduced, saving time and energy. This model only takes 20-30 minutes to heat without sunlight, whereas a single tank solar water heater takes 2-3 hours
Injection!What is this fluid?
Non-toxic
Under normal circumstances, the antifreeze fluid provided by professional solar companies is not toxic, but the antifreeze liquid supplied on the market is. very toxic. It can be toxic. If you use a glycerol mixture, it is expensive but non-toxic. Currently, ethylene glycol is the main vehicle antifreeze on the market due to its high cost, but propylene glycol is non-toxic. is an important raw material for saturated polyester, epoxy resin and polyurethane resin. Its consumption in this area represents approximately 45% of the total consumption of propylene glycol. This unsaturated polyester is widely used in surface coatings and reinforced plastics. viscosity and hygroscopic and is non-toxic, so it is widely used as a hygroscopic agent, antifreeze, lubricant and solvent in food, pharmaceutical and cosmetic industriestick
Propylene glycol is commonly used in the pharmaceutical industry to make various solvents, softeners and excipients for ointments and ointments. It is used as a solvent for mixing agents, preservatives, ointments, vitamins, penicillins, etc. in the pharmaceutical industry. Since propylene glycol has good miscibility with various spices, it is also used as a solvent. as a solvent and softener in cosmetics, etc.
Propylene glycol is also used as a tobacco moisturizer, an antifungal agent, a lubricant for food processing equipment, and a solvent for food marking ink. Also used as a wetting agent for tobacco, antifungal. agent, fruit ripening preservative, antifreeze and heat carrier, etc.
Baidu Encyclopedia - Propylene glycol
There are two types of injection media for flat panel solar water heaters: thermal fluid and antifreeze fluid.
Thermal fluid: its main function is to transfer and exchange heat from the collector to the heat storage device.
Antifreeze: Its main function is to prevent. the water in water pipes and water tanks does not freeze at low temperatures so that it can be used normally