In the past two years, with the upgrading of consumption in the south, the air source heat pump cooling and heating unit has big market, The fundamental reason for the huge changes in the market is that consumers’ demand for heating and cooling has been upgraded from functional demand to comfort demand. Driven by the overall consumption upgrade, the cooling-heating air source heat pump has been favored by more and more consumers because of its outstanding advantages in comfort, energy saving and environmental protection. The market for heat pump cooling heating unit scale is developing rapidly at a growth rate of more than 200%.
Compared with wall-hung boiler heating systems, the air source heat pump cooling heating system has a higher technical threshold. In practical applications, there are also various problems, which make many dealers daunting. The following experience is for your reference!
Try to add pure water to the system
When installing a heat pump cooling-heating system, many of us may not pay much attention to this water quality problem. Because water quality varies from place to place, the content of calcium and magnesium ions in some water is relatively low, so adding them to the system may not be a big problem. In some areas, the calcium and magnesium ions in the water are extremely high. When added to the system, it can be used for up to two years for one year, which may cause blockage of pipelines, Y-type filters, pumps, and units, which will seriously affect the use.
In addition, in areas where the temperature is relatively low in winter, it is recommended to use antifreeze. The antifreeze generally has instructions, or add alcohol to pure water for antifreeze. If you use alcohol, it is recommended to add 9° industrial alcohol. The amount of alcohol is based on the actual situation and the amount of circulating water in the system. To adjust. For example, if the circulating water volume in the system is 100, adding one kilogram of alcohol, the alcohol content of the water is basically 1%, then the freezing temperature of the water is -1℃. If you add five kilograms of alcohol, the water content in the system is 5%, so it can withstand the environment of -5°C (no freezing).
In many areas, the temperature is low in winter. When users do not use floor heating or long-term power outages at night, it is easy to cause pipelines or units to freeze and crack, so a certain amount of antifreeze or alcohol is required.
Two-way ball valve must be added to the fan coil
Without the two-way ball valve, some rooms will feel cold air coming out of the air outlet when not in use, and the power consumption of the system will be slightly higher. The installation location is at the outlet of the fan coil, and in the whole system, if there are 5-6 air discs, then at least one of the air discs must be equipped with a three-way ball valve. After installing a two-way ball valve in a cold area in the north, if the room is not in use, there is a possibility of freezing and breaking the copper pipe of the wind disc. The solution: one is not to install the two-way ball valve in the cold area; the other is to use antifreeze.
The recommended pressure of the home improvement small dual-supply system is 4 kg
The home improvement heat pump cooling heating system is generally better to adopt a closed system. The recommended pressure is 0.4 MPa, which is 4 kg, the maximum is not more than 6 kg, and the minimum is not less than 1.5 kg. If the system pressure is too low, the resistance of the pipeline will increase, and the water pump is easier to get air. If the system pressure is too high, the valves and pipelines are prone to rupture or water leakage.
All pipes must be insulated
Whether we are doing a home improvement heat pump cooling heating system or a hot water project, the indoor pipes, especially the pipes in the top floor, must be insulated, especially the dual-supply system, and the condensate drain pipe must also use insulation cotton. And to tie it up with tape to prevent leakage of condensate.