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来源: 日期:2017-12-21 发布人:admin
Ji'nan air conditioning repair air-conditioning manufacturers to remind the pressure of each maintenance personnel only and is related to the type and size of air conditioning refrigerant is never mind, R22 0.4 - 0.6MP 1.6 high pressure refrigerant low pressure and suction pressure 1.9MP under normal circumstances is 0.35-0.55MP, the exhaust pressure is between 1.30-2.20MP, the pressure is generally the suction pressure air conditioning unit test, if the ambient temperature is high a little pressure should be a little higher, the ambient temperature is low, low pressure is appropriate to a low point.
The reasons for the increase of suction pressure in the air conditioning refrigeration system are as follows:
1. The expansion valve of the electronic expansion valve is too large.
2. The temperature of outdoor environment is too high.
3. There is an excessive amount of air or fluorine in the system.
4. The speed of the outdoor fan motor is too low or not running.
5, the efficiency of the suction and exhaust of the compressor is reduced.
The normal operating pressure of the refrigeration is about 0.4 ~ 0.5MPa, the operating pressure of the heat production is about 1.5 ~ 2.1MPa, and the normal value of the balance pressure is about 0.7 ~ 0.9MPa. The pressure increases with the increase of temperature and decreases with the temperature decreasing, as in the winter, the balance pressure may be reduced to 0.5MPa. Under the rated working voltage, the normal operating current of the single phase air conditioner in the refrigeration is about 4A per 1P, and the three-phase air conditioner is about 4A per 3P. The running current will increase by 0.5 ~ 2A when the heat is made.
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