Water chiller unit and water chiller unit controlling method and device

Abstract

The invention discloses a water chiller unit and a water chiller unit controlling method and device. The water chiller unit controlling method comprises the steps of obtaining a set targetwater temperature and an actual water temperature of the water chiller unit, obtaining a rate of change of the water temperature, obtaining a first difference value between the actual water temperature and the targetwater temperature; predicting a required first cost duration for the actual water temperature to fall to the targetwater temperature according to the first difference valueand the rate of change of the water temperature, and adjusting the load of the water chiller unit according to the first cost duration. Therefore, according to synthetic judgement of a deviation between thecurrent actual water temperature and the targetwater temperature and the rate ofchange of the water temperature, the load of the water chiller unit is adjusted, the condition that a compressor starts and stops frequently is effectively reduced, the stability of the water temperature is improved, and use experience of users isimproved.

Description

technical field [0001] The invention relates to the technical field of energy regulation, in particular to a chiller and a method and device for controlling the chiller. Background technique [0002] In practical applications, the chiller can be controlled according to the deviation between the actual water temperature and the water temperature target value, so that the actual water temperature in the chiller approaches the target value. [0003] However, in actual use and operation, due to the variable load of the user and the hysteresis in the change of the water temperature of the chiller, the chiller is controlled only according to the deviation between the actual water temperature and the water temperature target value, which often causes the chiller to fail. Frequent loading and unloading of the main engine, and even continuous start and stop, not only reduces the reliability and service life of the compressor in the chiller, but also easily causes large fluctuations i...

AI Technical Summary

Problems solved by technology

[0003] However, in actual use and operation, due to the variable load of the user and the hysteresis in the change of the water temperature of the chiller, the chiller is controlled only according to the deviation between the actual water temperature and the water temperature target value, which often causes the chiller to fail. Frequent loading and unloading of the main engine, and even continuous start and stop, not only reduces the reliability and service life of the compressor in the chiller, but also easily causes large fluctuations in water temperature, resulting in high and low room temperature, which greatly reduces the user experience

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