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The use of consumers generally difficult to see from the appearance of "tricky" this loophole, a lot of air conditioning manufacturers in order to reduce costs even to deceive consumers, air conditioning outdoor unit connected to the tube from copper to aluminum. Recently, Xiamen City Consumer Council will receive a lot of complaints about such complaints.

According to reports, some air conditioning manufacturers usually practice is to weld a small copper pipe at both ends of the tube, plus sets of insulation tube seal. Another brand, obviously use the aluminum tube, but in the product brochures on the openly indicate the copper tube.

However, according to quality supervision departments and air conditioning experts, the current use of aluminum pipe than the use of copper pipe there is a greater technical risk and quality risks. As the aluminum tube density is small, soft texture, in the pressure, corrosion resistance and resistance to high and low temperature performance can not be compared with copper. And copper and aluminum phase connection may be difficult to weld, corrosion each other, easy to leak ammonia, affecting the cooling effect and other issues, resulting in greatly reduced air conditioning life, serious when there will be outside the tube burst and compressor fire.

To this end, Xiamen City Consumer Protection will remind consumers: now when the air conditioning sales season, in the purchase of air conditioning and inspection machine installation, to identify the copper or aluminum, can refer to the following:

    Aluminum tube than the copper tube to light, before the installation of air conditioning, consumers can weigh the external tube, if the weight is too light, there may be "black tube."
    The outer tube surface of the insulation tube can be faded part of the inspection to see whether there is copper and aluminum phase.
    In the purchase of air conditioning should be made to the business official invoice, and asked to indicate on the invoice is the original copper, in order to find consumer fraud as evidence of the use of complaints.