Control method and control device for automatically adding antifreeze solution

Abstract

The invention discloses a control method and a control device for automatic addition of antifreezing solution. The control method comprises the following steps: judging whether cooling water on the surface of a heat exchanger in refrigeration equipment is frozen or not; when a controller detects that the cooling water is in a frozen state, controlling an addition pump to be started, extracting antifreezing solution from a concentrated antifreezing solution vessel by the addition pump, and conveying the antifreezing solution to the refrigeration equipment; and when the controller detects that addition of the antifreezing solution is completed, controlling the addition pump to be closed, and finishing operation. The antifreezing solution adding method provided by the invention is not only applicable to automatic addition of the antifreezing solution for the cooling water of a water-cooling heat pump air conditioner and an evaporation cooling type heat pump air conditioner, but also can guarantee that addition amount of the antifreezing solution accords with the real-time operation condition requirement of a heat pump system, guarantees normal operation of an air conditioner system under low ambient temperature working condition and is simple in process, high in accuracy and low in cost.

Description

technical field [0001] The invention relates to the field of refrigeration systems, in particular to a control method and a control device for automatically adding antifreeze solution. Background technique [0002] In winter, antifreeze needs to be added to prevent the cooling water in water-cooled heat pump air conditioners or evaporative cooling heat pump air conditioners from freezing. The existing method of adding antifreeze is to use measuring cups and measuring cylinders according to the freezing point value corresponding to the concentration of antifreeze in the water. Waiting for laboratory instruments to detect the concentration of antifreeze in the water before manually adding antifreeze. However, this method is purely manual, which is complicated to operate, inconvenient to use, large in error, and high in cost. Contents of the invention [0003] In order to solve the above technical problems, the present invention discloses a control method for automatically ad...

AI Technical Summary

Problems solved by technology

[0002] In winter, antifreeze needs to be added to prevent the cooling water in water-cooled heat pump air conditioners or evaporative cooling heat pump air conditioners from freezing. The existing method of adding antifreeze is to use measuring cups and measuring cylinders according to the freezing point value corresponding to the concentration of antifreeze in the water. Wait for the laboratory instrument to detect the concentration of antifreeze in the water before manually adding antifreeze. However, this method is purely manual, which is complicated to operate, inconvenient to use, large in error, and high in cost

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