Hitachi inverter compressor What improper operation caused the explosion of the air conditioning compressor? The Beijing Daxing cold storage on November 18, 2017 caused a fire, which sounded the alarm for practitioners in the refrigeration industry. 19 people were killed and 8 injured. This is just the number reported at the time. According to reports, the fire occurred when the new cold storage was installing and debugging refrigeration equipment. The specific findings have not yet come out, and I don’t want to comment too much. I just hope everyone will take it as a warning, safety is the first, and the dead will rest in peace. Today we continue to talk about the reasons for the explosion of air-conditioning compressors. The editor of okmarts.com will list several improper operations that caused the explosion of air-conditioning compressors. 1. Violation of leak detection operation leads to explosion of air-conditioning compressor
Operation process: close the high-pressure valve, turn on the compressor, use the compressor to charge the outdoor unit refrigeration system with air pressure, Hitachi inverter compressor, in order to carry out the leak check for a few minutes. Result: The air conditioning compressor exploded. Process analysis: mainly for the danger of compressor suction air operation. There is a certain amount of refrigerating machine oil in the air-conditioning compressor (the random type varies from 350cc to 950cc). Under certain pressure and temperature conditions, the refrigerating machine oil will spontaneously ignite, causing abnormal high temperature and high pressure inside the compressor. Hitachi ri32 frequency conversion The compressor will eventually cause the compressor casing to rupture and then explode. 2. When the machine is moved (including the operation of replacing the indoor unit or the need to recover the refrigerant), the operation of illegally recovering the refrigerant causes the air conditioner compressor to explode. Air conditioner transfer is also a regular business, and refrigerant recovery is required during the transfer process. However, if not operated properly, it will also cause serious consequences for the compressor to explode.
Operation process: air-conditioning compressor operation> close high-pressure valve> air-conditioning system low-pressure side leakage air intake> operation for a few minutes> compressor explosion. Process analysis: Due to the leakage point of the air conditioning refrigeration system, the inverter compressor and Hitachi, there is no refrigerant or a small amount of refrigerant remaining in the system due to the leakage point on the low pressure side, causing the compressor to suck air and operate with the high pressure side off , And eventually exploded.
3.For flammable refrigerants, if they encounter refrigerant leakage and open flames, the high-pressure operation of the air-conditioning compressor suction air reaches the flash point... In short, masters should pay more attention to the maintenance of this type of refrigerant air-conditioning, if there is no professional The best training is not to touch, especially when the compressor is operated in a harsh environment for a long time, which leads to the loss of protection function and the accident caused by improper operation. Double-cylinder rotary compressor
What is a two-cylinder rotary compressor? In fact, the so-called double-cylinder rotary compressor is also called a double-rotor compressor, which is composed of upper and lower cylinders, and their rotors are symmetrically distributed at 180° to each other. When the gas is compressed, the two cylinders will also maintain The 180° phase difference theoretically proves that the torque change range of the double-cylinder compressor is one-third of the single-cylinder compressor. The torque change of the double-cylinder compressor is also the fundamental cause of vibration, so it can make the compressor The vibration is greatly reduced. And can effectively solve the vibration situation of large rotary compressor. What is the reason for using a special compressor for heat pump water heaters? ——Okmarts.com Since the promotion of heat pump compressors in 2009, many domestic compressor manufacturers have invested in the development of heat pump compressors in order to provide the core guarantee for the healthy development of heat pump water heaters. The operation mode of the heat pump water heater is very different from the air conditioner, which determines the difference in the design concept between the heat pump compressor and the air conditioner compressor. The trouble-free long-term stable operation is the primary requirement for heat pump compressors. Compared with the air conditioner, the heat pump water heater has a big difference in the running time. The running time of the heat pump water heater system is much higher than that of the air conditioner.
Air conditioners are used frequently in summer, but water heaters are daily necessities, and the running time in winter is particularly long. The time to heat a tank of water in winter is several times that in summer, so it is necessary to confirm the operation mode of the heat pump water heater in winter. According to statistical calculations, heat pump water heaters have 2/3 of the lifespan consumed in winter. Because the outlet temperature of the heat pump is above 55 degrees, the temperature of the water tank will drop with the use of the compressor. When the temperature drops to about 45 degrees, the compressor needs to be started. Therefore, the compressor is basically operated at the condensing temperature. High area. Condensation temperature is the main factor that affects the life of the compressor. Under the condition of running for the same time, the combined load of the heat pump hot water compressor is much higher than that of the compressor in the air conditioner. The main motivation for consumers to buy heat pump water heaters is energy saving and convenience. Consumers will use more water for this, which also increases the working time of the heat pump. If the heat pump water heater is used for heating + domestic hot water, it may run for a long time throughout the heating season. Based on the above factors, it can be seen that the actual running time of the heat pump water heater will increase significantly. To ensure that there is no failure in the life cycle of the heat pump water heater, the compressor needs to be able to withstand 20,000 hours of actual operation. Therefore, it is very necessary to use a heat pump special compressor.
