Evaporative cooling air conditioner and control method for cooling medium driving pump body thereof

Abstract

The invention discloses an evaporative cooling air conditioner and a control method for a cooling medium driving pump body thereof. The method comprises the steps that S1, the dry bulb temperature Td1and the relative humidity RH1 of outdoor cold air are read; S2, on the basis of the dry-bulb temperature Td1 and the relative humidity RH1, the inlet air wet bulb temperature TW1 and the moisture content d1 are calculated; S3, the theoretical optimal moisture content d2 is calculated according to the inlet air wet bulb temperature TW1 and the optimal relative humidity RH; S4, the amount mw of a cooling medium to be sprayed is calculated according to the moisture content d1, the theoretical optimal moisture content d2 and the rotating speed fn of a fan on the outdoor side; S5, the spraying pressure P1 required by spraying is converted according to the amount mw of the cooling medium; and S6, the operation frequency of the cooling medium driving pump body is adjusted according to the spraying pressure P1 until the pressure in a cooling medium conveying pipeline in the evaporative cooling air conditioner reaches the required spraying pressure P1. According to the control method, the spraying amount of the cooling medium can be controlled according to the outdoor cold air parameters, the spraying efficiency is improved, and the resource waste of the cooling medium and electric energyconsumption are reduced.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to an evaporative cooling air conditioner and a cooling medium-driven pump body control method thereof. Background technique [0002] The existing indirect evaporative cooling air conditioner judges whether to enter the wet working mode by detecting the outdoor dry bulb temperature or wet bulb temperature. If it enters the wet working mode, the spray water pump is turned on to deliver the water in the water tank to the spray system. The spray system evenly distributes water on the indirect heat exchange core, and the water evaporates to cool the outdoor cold air, and the cooled outdoor cold air then exchanges heat with the indoor hot air through the indirect heat exchange core, thus making the indoor heat Air temperature drops. [0003] When the existing indirect evaporative cooling air conditioner needs to turn on the spray, it is only controlled by turning on the water pump, and t...

AI Technical Summary

Problems solved by technology

[0002] The existing indirect evaporative cooling air conditioner judges whether to enter the wet working mode by detecting the outdoor dry bulb temperature or wet bulb temperature. If it enters the wet working mode, the spray water pump is turned on to deliver the water in the water tank to the spray system. The spray system evenly distributes water on the indirect heat exchange core, and the water evaporates to cool the outdoor cold air, and the cooled outdoor cold air then exchanges heat with the indoor hot air through the indirect heat exchange core, thus making the indoor heat air temperature drops

[0003] When the existing indirect evaporative cooling air conditioner needs to turn on the spray, it is only controlled by turning on the water pump, and the water volume of the spray cannot be adjusted. In this control mode, when the ambient air humidity is high and the outdoor side air volume is small, the outdoor cold air The required amount of spraying water is small, and a certain fixed amount of water is still used for treatment at this time, which will cause the water pump to do extra work and waste electric energy, and the excess spraying water mist will be taken away by the outdoor wind, resulting in waste of water resources. On the other hand , the excess spray water will also increase the resistance of the outer fan, and the labor consumption of the fan will increase, resulting in a lower energy efficiency of the unit

Images