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    Air conditioners cost more than 10 years and are not safe

    Release time: 2017-06-16
    Conclusion 1 Poor safety performance is likely to cause leakage. Through comparative tests, it is found that air conditioners that have been used for 10 years or more have poor safety performance. Xu Jing, Secretary General of the Municipal Consumers Committee, introduced that in this test, there were three sets of leakage currents at operating temperatures that did not meet the standards, which posed a risk of electric shock. Secondly, the 24 sets of grounding measures in the test did not meet the specifications. According to national standards, the grounding resistance requirement is not greater than 0.1 ohms. In this test, the ground resistance of Chunlan air conditioner (model KFR-25GW / T) is 1.824 Euros, and the ground resistance of Haier air conditioner (model KFR-36GW) is 1.657 Euros. Analysis: As the outdoor unit has been subjected to the erosion of the natural environment for a long time, the easy-to-touch metal parts of the appliance are rusted, causing the grounding resistance to fail to meet standards. Conclusion 2 Xu Jing, an air conditioning variable fan with poor cooling effect, stated that in this energy efficiency ratio test, it can be seen that the energy efficiency ratios of the 17 old air conditioners that can work normally are from the cooling capacity test. The cooling capacity of the old air conditioners has not met the requirements of the current standards. The cooling capacity of some old air conditioners is even lower than 50% of the rated cooling capacity, which is far lower than the current standard which is not less than 95% of the rated cooling capacity. Analysis: The cooling and heating of the old air conditioner did not meet the current standards, mainly due to refrigerant leakage, heat exchange due to dust accumulation in the condenser and evaporator, reduction in the speed of the compressor due to aging, and poor lubrication of the fan motor bearings. Among them, refrigerant leakage is a common cause, and refrigerant leakage is mostly due to inadequate installation of air conditioners or long-term vibration.

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