Control method of air conditioner and air conditioning unit

Abstract

The invention relates to a control method of an air conditioner and an air conditioning unit. The control method includes: acquiring corresponding relation between a return air temperature set point and an indoor comfort index; determining a current return air temperature set point corresponding to a current indoor comfort index according to the current indoor comfort index and the corresponding relation; if the current return air temperature fluctuates ups and downs within the range of + / - first switching deviation of the current return air temperature set point, adjusting the openness of a water valve according to temperature difference of supplying and returning water, or otherwise, adjusting the openness of the water valve according to the return air temperature. Segmentation optimization control of multi-objective variables is realized, the method can be switched between the water temperature difference control mode and the return air temperature control mode according to change of the return air temperature, the openness of the water valve can be reduced, energy conservation effect can be achieved, and meanwhile, requirements on comfortableness are met.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to an air conditioner control method and an air conditioner unit. Background technique [0002] As the terminal cooling water equipment combined air conditioner of the central air conditioner, its conventional control method is through the control method of single target variable (the return air temperature is used as the control variable, and the set value of the return air temperature is used as the control target), and the switch value control mode or proportional Control mode to adjust the opening of the water valve flowing through the refrigerated circulating water of the surface cooler, so as to realize the adjustment of the cooling and heat exchange of the indoor load. [0003] The conventional control method of the combined air conditioner can basically meet the normal operation of the unit; however, through a comprehensive investigation on the use of customers who use the co...

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Problems solved by technology

[0003] The conventional control method of the combined air conditioner can basically meet the normal operation of the unit; however, through a comprehensive investigation on the use of customers who use the combined air conditioner, it is found that in some cases, for example, due to the combination of the combined air conditioner and the indoor If the load matching is unreasonable, or the fan air volume design matching is not good, or the design margin of the water pipe diameter is too large, etc., it will lead to frost condensation at the air supply port, too fast and too large adjustment range of the water valve, and insufficient indoor comfort. Good and other problems exist

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