Changzhou Jiahao Refrigeration Technology Co., Ltd.

The main materials include copper pipes, aluminum pipes, and copper - aluminum connecting pipes. Among them, copper pipes are the mainstream choice due to their optimal corrosion resistance, thermal conductivity, and stability.

Pure copper pipes have better comprehensive performance, with good aging resistance and being less likely to leak refrigerant, suitable for long - term use; copper - aluminum pipes have lower costs, but the joints are prone to oxidation due to material differences. Good sealing protection is required, and they are more suitable for short - term scenarios or when the budget is limited.

Yes, it does. Excessive length will lead to increased refrigerant loss and reduced cooling/heating efficiency. Generally, it is recommended not to exceed the maximum allowed length marked by the manufacturer (usually 10 - 15 meters). If exceeded, professional personnel need to adjust the refrigerant amount.

Thermal insulation is necessary. Without thermal insulation, cold/heat loss will occur (affecting efficiency), and it may also produce condensed water to damage walls or furniture. Special thermal insulation cotton should be used for wrapping, and the joints should be sealed tightly.

First, turn off the air - conditioner and contact professional maintenance personnel to detect the leakage point (usually at joints, bends). Replace the damaged pipe section or re - weld and seal. After repair, it is necessary to refill with refrigerant that meets the specifications.

Moderate bending is allowed, but excessive bending or forming a dead bend should be avoided, otherwise it will lead to pipe blockage and poor refrigerant circulation. The recommended bending radius should not be less than 5 times the diameter of the pipe.

If properly maintained (no corrosion, no leakage), pure copper pipes can be used for 10 - 15 years; the service life of aluminum pipes or copper - aluminum pipes is relatively short. Generally, inspection is required every 5 - 8 years, and they should be replaced in a timely manner when oxidation, bulging, or leakage occurs.

Pure copper pipes used outdoors need to be properly rust - proof (such as painting with anti - rust paint). Aluminum pipes are prone to oxidation and corrosion by rainwater. It is recommended to additionally wrap the exposed section with a waterproof and thermal insulation layer, or try to avoid the connecting pipe being exposed outdoors for a long time.