Scale-inhibiting copper-based heat exchange surface and manufacturing method thereof

Abstract

The invention discloses a copper-based heat exchange surface. A Ni-P-PTFE composite clad layer covers on the surface of a copper-based material and has the excellent coefficients of heat conductivity, and simultaneously, can reduce the surface energy of the copper-based material to fulfill the aim of inhibiting scale. In addition, the invention also discloses a manufacturing method of the copper-based heat exchange surface. The copper-based heat exchange surface and the method have the advantages that Ni-P-PTFE is plated on the surface of the copper-based material, and water molecules cannot moisten the surface of PTFE fully so as to form attached scale deposits by utilizing the characteristic of low PTFE surface wettability; the surface energy of the material is reduced on the premise ofensuring the excellent coefficients of heat conductivity so as to fulfill the aim of inhibiting scale; in order to improve the heat conductivity of the surface of red copper, basic plating solution containing metal Ni is adopted in a chemical composite plating method, and the heat conductivity is high; and the copper-based heat exchange surface has the low surface energy and low adsorptive capacity on scaling crystal nuclei, and simultaneously, has the nonwetting characteristic and is not favorable for depositing and aggregating the scale deposits.

Description

technical field [0001] The invention relates to the technical field of heat exchange materials, in particular to a scale-resistant copper-based heat exchange surface and a manufacturing method thereof. Background technique [0002] When the existing copper heat exchanger exchanges heat with high-temperature water, a layer of scale with low thermal conductivity will be deposited on the inner and outer surfaces of the heat exchanger, which will seriously affect the heat transfer performance of the heat exchanger. If the condenser in the heat pump water heater is immersed in the water tank to heat domestic water, the temperature of the hot water can reach 50-95°C. Due to the presence of a large amount of Ca in water 2+ , Mg 2+ Metal ions, such as metal ions, will undergo a chemical reaction in the environment where the heating and cooling process is repeated to generate CaCO 3 , CaSO 4 , Mg(OH) 2 , MgSO 4 , magnesium phosphate, calcium phosphate and other precipitation, a...

AI Technical Summary

Problems solved by technology

[0003] The existing conventional scale treatment methods are as follows: (1) Soften the water before heating, but it is necessary to add a water treatment equipment for softening water, and the timeliness is poor; (2) Coat the pipe wall with a hydrophobic coating , however, the hydrophobic coating will increase the heat conduction resistance of the tube wall and affect the heat transfer effect