Refrigerator r290 refrigerant working pressure

1, the working pressure of refrigerant is generally around 15 kg, and the suction pressure is 3 to 6 kg. This is related to the ambient temperature. Usually, if the ambient temperature is high, the pressure will be correspondingly high. The working pressure of r290 refrigerant in the freezer in summer is about 15 kg, and the suction pressure is 3-6 kg. The main methods are: 1. When adding refrigerator refrigerant, make sure that the system stops before connecting the system. 2. When adding refrigerant to the refrigerator, it is usually necessary to close the high and low pressure valves before adding r290 refrigerant to the refrigerator. Then the process of vacuumizing the system can be carried out. First, open the high and low pressure valves, and then drain the system. After a period of time, check whether there is complete vacuum, then close the high and low pressure valves, and finally turn off the vacuum pump. When adding refrigerant, disconnect the yellow pipe in the freezer from the vacuum pump, then connect it to the refrigerator bottle and tighten it. At this time, the refrigerant in the refrigerator 2290 may be added.