How to distinguish the quality of central air conditioning installation materials

How to distinguish the quality of central air conditioning installation materials

First of all, we need to know what are the necessary installation materials for central air conditioning installation? There are mainly 4 kinds of installation materials necessary for central air conditioning installation: refrigerant copper pipes, insulation cotton, condensate pipes, and splitters. So how to distinguish the quality of these installed materials?

　　 One, refrigerant pipeline

　　 High-quality refrigerant copper pipes have high cleanliness and strong pressure resistance, and will not be broken due to uneven pressure during operation. Inferior refrigerant copper pipes are easily squeezed and deformed by external forces, which may cause the cold coal pipes to rupture during operation, which affects the cooling/heating effect of the air conditioner. How to identify copper pipe?

Look at the color: the best refrigerant copper tube at present is the red copper tube with a purity of more than 99%, which is called pure copper, and the color is rose red; other copper tubes are mostly alloy copper tubes, such as brass tubes, whose purity is 7: 3 Copper and zinc compounding ratio, the color is yellow.

　　 Touch by hand: The inner and outer walls of the high-quality refrigerant copper tube are smooth, clean, and free of defects such as blisters, oxidation, and cracks.

　　Bending copper pipe: The high-quality copper pipe has no creases and deformation after bending; the inferior copper pipe is easy to produce creases after bending, and is easy to be squeezed and deformed.

Copper tube process: At present, the production of copper tube mainly includes extruded process copper tube and stretched copper tube. The extruded wall thickness is thicker and the wall thickness is more uniform, and the stretched wall thickness is easy to be uneven. New environmentally friendly refrigerant ( R410A) The operating pressure is large, and the weakened wall of the tensile copper tube is easy to burst.

　　 2. Condensate pipe

　　High-quality condensate pipe, high strength, not easy to bend and deform, smooth inner wall, not easy to build up dirt, and low drainage resistance. Inferior condensate pipes have thin inner walls and are easy to deform; they are easy to burst and crack when washed by water.

Look at the surface: look at the surface finish and whiteness of the water pipe. A good condensate pipe has the same color inside and outside, which is off-white with oily gloss on the surface. If the color is too white, there may be too much calcium powder, and yellow may be poor in PVC material and easy to oxidize and weather resistance. Poor.

　　Measure the wall thickness: The wall thickness of a good condensate pipe should be uniform and smooth, and the wall thickness is better.

　　 Sampling test: The color of the tube is unusually bright but easily broken is usually a high-calcium product with calcium powder. Take the sample and step on the edge of the tube to see if it cracks easily.

　　 Three, insulation cotton

　　High-quality thermal insulation, high density, low thermal conductivity, better thermal insulation effect. It has excellent resistance to water penetration, and the heat preservation is longer. Inferior thermal insulation, poor resistance to water vapor, easy to enter water and moisture, and poor thermal insulation effect.

　　Look at the appearance: the foaming pores of the thermal insulation cotton, the smaller and denser, the better the shock resistance, heat insulation and heat preservation effect.

　　 Measuring wall thickness: same grade, the same diameter of pre-installed copper pipe/water pipe, the thicker the insulation wall thickness, the better the insulation effect. And the thickness of insulation cotton of each pipe diameter has corresponding national standards.

　　 Squeeze test: Use your hands to hold and hold for heat preservation. The ones that are easily deformed after being squeezed are generally low-quality heat preservation, and those that do not deform after squeezing are generally high-quality heat preservation.

　　Four, splitter

　　High-quality splitter, made of high-quality copper material, bright in appearance, not easy to oxidize, and uniform welding rules. Inferior splitter, easy to desoldering, false welding, oxidation, easy to cause fluorine leakage explosion and other hazards.

　　Look at the appearance: the high-quality splitter has bright color, uniform and firm welding, and the inside and outside of the pipe wall is clean, free of impurities and dirt; poor splitter welding is easy to desolder, contain impurities, and easy to oxidize.

　　Measuring wall thickness: The thickness of the copper pipe used in the branch pipe should be determined according to the size of the diameter. The larger the diameter, the thicker the copper pipe should be used. Under normal circumstances, 1mm thick copper pipe is sufficient for diameters below 22.3, 1.3mm copper pipes for 31.8 and below, 1.5mm copper pipes for 35 and above are best, copper pipes of suitable thickness can be used to ensure the maximum quality . The splitter and copper tube should be made of red copper, especially the splitter of R410A special copper tube.