Descaling agent for cleaning central air conditioner main machine

Abstract

The invention relates to a scale and rust remover used for cleaning main frame of central air-conditioner. It is characterized in that it comprises solid mixture and liquid inhibitor; said solid mixture comprises amidosulfonic acid, polyphosphinic acid chelating agent, silicofluoride scale and rust dissolution promotor, non-ionic surface activator aliphatic alcohol polyester penetrant, their weight proportions in order are as follows: 75%-85%, 5%-10%, 5%-10%, 1%-5%; said inhibitor is liquid and comprises hexamethylene tetramin, aniline and methyl azimido-benzene according to weight proportion of 2: 2: 1. Said inhibitor is added into acidic washing solution with its weight amount being 0.3% of that of water amount. The product can dissolve carbonate, silicate, sulfate and iron oxide, the descaling speed at room temperature is fast, and is increased within 60 Deg. C, the corrosive rate to metal is pretty low, and there is no acid mist and harmful gas generation during desaling process.

Description

technical field [0001] The invention relates to a descaling and descaling agent for cleaning copper heat exchange equipment, especially a main engine of a central air conditioner. technical background [0002] Copper heat exchange equipment, such as central air-conditioning hosts, etc., after a period of operation of such equipment, due to the continuous evaporation and concentration of circulating water, the harmful ions in the water will multiply, and the concentration of insoluble or slightly soluble salts in the water will exceed its solubility. Especially when the water flow velocity is low or the heat transfer surface is rough, these crystalline precipitates will deposit on the heat transfer surface, forming what is commonly referred to as scale. The formation of scale will bring three problems: firstly, it reduces the cooling effect. The heat transfer film coefficients on both sides of the copper tube of the refrigerator condenser are very large. Therefore, the influ...

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Problems solved by technology

The formation of scale will bring three problems: first, it reduces the cooling effect

With the development of cleaning technology, there are GR-929 silicon scale and rust cosolvents from Lanzhou Gray Company, PD-4000 solid rust and scale remover from South Korea CLEANSOL Company, and ES-122 precision cleaning agent from Eisen Equipment Maintenance Technology Co., Ltd. Other types of cleaning agents represented by water system descaling agents have come out. This type of cleaning agent has the characteristics of low corrosion rate, safe operation, and convenient use. However, the descaling effect is still not very satisfactory and needs to be improved.

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