Frost valve：

In winter, when the outdoor temperature is lower than 0℃, the water system of the heat pump unit may face the risk of freezing bad pipes and heat exchangers. Once the heat exchanger of the heat pump unit freezes, the whole unit is scrapped and faces huge losses. When the heat pump unit runs in the winter, the water of the pipeline and heat pump unit will ice up when the power is cut off or the heat pump unit fails. If the water of the pipeline and the unit can not be discharged in time, the unit will be damaged, and the antifreeze valve is that when the water temperature in the pipeline is lower than the set value, the small amount of water in the pipeline will be automatically discharged to avoid the water freezing volume becoming larger and freezing the unit or the pipeline. 

function Introduction：

Antifreeze valve in the central air conditioning heat pump water system is mainly used to protect the host heat exchanger and pipeline to prevent damage caused by icing, when the water temperature in the water pipe is reduced to the temperature of the valve open, antifreeze valve opens the valve body drainage, because the antifreeze valve is installed in the water supply and return pipe drainage, so that the antifreeze valve can discharge the heat pump unit and the water in the pipeline in time. The heat exchanger of the unit is prevented from freezing and the pipeline system is frozen, thus protecting the heat pump unit and the water pipe. Antifreeze valves are mainly used in solar energy systems to protect solar panels from damage caused by freezing: When the external temperature of the collector plate is reduced to the open temperature of the valve body, the antifreeze valve will automatically open the valve body to drain, at this time, the hot water in the solar water storage tank will enter the collector plate, so that the water temperature in the collector plate will increase, to avoid the water temperature in the collector plate continues to decrease and freeze, damaging the collector plate; When the water temperature in the collector is higher than the opening temperature, the antifreeze valve automatically closes and stops draining water.

Technical parameter:

Application scenarios:

When the heat pump is used in the cold region of the north, the pipe exposed to the outside may freeze, which will cause great losses to the heat pump unit and system, and it is often produced when the following problems occur at the same time:

1, the outdoor temperature for a long time close to or below 0℃;

2, the outdoor pipe does not have good insulation;

3, the system does not add antifreeze or add proportion is not enough;

4, the heat pump unit failure or unexpected power failure.

When these problems occur, the antifreeze valve can automatically open and empty the circulating water in the outdoor pipeline to prevent freezing, so as to protect the main engine, pipelines and valves and other equipment.

Matters needing attention; points for attention:

Before installing the equipment, clean the pipe thoroughly to prevent circulating impurities from affecting its performance.

1, the antifreeze valve should be installed outdoors, in the lowest part of the system in the pipeline, to prevent the heat pump is blocked. In addition, the valve should not be placed near the heat source, so as not to interfere with the operation.

2, the antifreeze valve can only be installed vertically, the water outlet faces down, the water can not be blocked, to ensure that the water is smooth.

3, the antifreeze valve must be installed on the outdoor main pipe connected to the indoor (heat pump due to power failure or failure of the pipeline is the most easily frozen place).

4, it is recommended to install an antifreeze valve in each heat pump water supply and return loop, otherwise there is still a risk of freezing in the outdoor pipeline. The system must maintain pressure at all times to ensure the normal operation of the antifreeze valve.

5. When the antifreeze valve is installed at the bottom of the heat pump unit or the heat collecting plate, it is recommended to check and clean the antifreeze valve regularly to avoid valve function failure due to blockage of the antifreeze valve.

It is also recommended to provide a proper drainage system to prevent ice from forming on the ground.