"Ray" stopped editing, the wind and rain weakened, and the cold air came again. In such a cold day, in addition to making clear the key points for the use of ultra-low temperature variable frequency air energy heat pump heating in winter, we should also take anti freezing measures!

Since heat pump units are usually installed outdoors, it is necessary to take anti freezing measures in the cold winter! This can not only ensure the stable operation of the system, improve the comfort of heating, but also avoid unnecessary economic losses. Come and have a look!

1. The host is more than 20mm from the ground

First of all, consider the installation details. If the ultra-low temperature variable frequency air energy heat pump host needs to be installed on the ground, the bottom of the host should be a certain distance from the ground. According to convention, the distance is generally required to be at least 20mm. The method of realization is also very simple. Steel supports are installed on the ground, and then the unit is fixed through expansion bolts, so that the ultra-low temperature variable frequency air energy heat pump can be stabilized in a horizontal state.

The advantage of this is that even if a large amount of condensate flows to the ground, it will freeze under the effect of low temperature. Because the unit is erected at a high place, it is not easy for ice to freeze the bottom of the heat pump unit.

2. Install the vent valve

In order to avoid unit suspension due to special circumstances, it is necessary to install drain valve and drain pipe at the lowest point of the water system during installation. Even if it is not at the lowest position of the unit, the inlet and outlet of the unit should also be equipped with drain valves.

3. Coil pipe needs to be bent through the wall

In the actual application and installation of the ultra-low temperature variable frequency air energy heat pump heating, it is inevitable that the pipe will pass through the wall. At this time, it should be noted that when the coil passes through the wall, it should not go straight and oblique. If the pipe is inclined upward, the water pipe is not bent, and the condensate may flow back along the pipe. In addition, the temperature of condensate is too low, which may directly damage the ultra-low temperature variable frequency air energy heat pump unit.

Use of antifreeze in winter

1. Pipe insulation

The exposed water pipes will decrease with the decrease of the external ambient temperature. If no thermal insulation measures are taken for the hot water pipes and return pipes, the heat consumption will be accelerated. Therefore, the pipe insulation is very important. The outer layer of outdoor thermal insulation is made of aluminum sheet, and the outer layer of indoor thermal insulation is bound beautifully with white ties. The pipeline valves and bends must be well insulated to avoid exposed points of the pipeline. When connecting pipe sleeves, the end faces (circumferential seams) of pipe sleeves must be coated with insulation glue. The longitudinal seams of pipe sleeves are required to be staggered, and the joints between pipe sleeves are sealed with glue. When connecting the pipe sleeve with the host and the wall, the end face of the pipe sleeve and the end face of the host and the wall must also be coated with insulation glue.

2. Add antifreeze to the system

When it is inconvenient for the unit to drain water, antifreeze can be added, such as antifreeze at - 15 ℃ and - 25 ℃. However, due to the high price of antifreeze, the initial investment cost will increase. In addition, when using antifreeze, pay attention not to use cheap antifreeze, such as methanol mixed antifreeze, which is corrosive to the pipeline and will cause great damage to valves, pipe fittings, water pumps and unit heat exchangers.

3. Keep power on

When the heat pump unit is used, it is required to keep the unit energized, which can not only ensure that the unit can provide heating all day, but also ensure that the unit will not frost when the compressor is started frequently, so that the unit can operate normally, and even start the automatic antifreeze protection function when the outdoor temperature is too low in winter.

4. Do not touch the function keys of the control panel

There are many keys on the control panel of the host, some of which are used to regulate the water temperature, and some of which are timed. If the user tampers with them, the normal operation of the host may be affected. For example, if the timer key is pressed, the host may not start when it needs to work.

5. Ice and snow treatment

If the outdoor pipeline has been frozen, but there is no cracking, remember not to knock the pipeline or pour hot water on it, and wait for the ice on it to melt naturally.

In addition, the installation position of the heat pump must not be poorly ventilated. If there are sundries in front of it, please pay attention to the cleaning. If the snow is too heavy in winter, pay more attention to the timely removal of snow.

6. Dispose of condensate properly

The main reason why the ultra-low temperature variable frequency air energy heat pump is frozen is that the air temperature is too low. Condensate will be generated when the host is working, and once the condensate drainage is not smooth and accumulates around the equipment, it may cause the equipment to freeze. Therefore, in order to avoid freezing of equipment, condensate must be effectively treated. The solutions are: First, raise the installation position of the host. The more serious the local ice and snow conditions are, the higher the installation position should be; 2、 Add tracing band on the chassis of the main engine to defrost and deice; 3、 Wrap the tracing band on the outer wall of the condensate or defrosting water drainage pipe to prevent icing.