Composite evaporative cooling water chilling unit, control method and device thereof and storage medium

Abstract

The invention belongs to the field of water chilling units, and provides a composite evaporative cooling water chilling unit and a control method and device.The method comprises the steps that whether the unit is in the working state of a dry mode or not is judged, and the dry mode is the mode that a cooling medium in a first cooling pipeline is cooled through air; if the unit is in the working state of the dry mode, the chilled water temperature of a chilled water inlet and / or a chilled water outlet of the cooling plate heat exchange module is obtained; and when the temperature of the chilled water is lower than a preset first temperature threshold value, the fourth control valve is controlled to be closed, and the third control valve is opened. When the temperature of the chilled water is lower than the preset first temperature threshold value, the fourth control valve is controlled to be closed, the third control valve is opened, the chilled water flows through the heat exchanger, the heat exchanger pipeline is prevented from being frozen and damaged, and therefore the unit can be normally used in severe cold weather, the adaptability of the unit is improved, and the service life of the unit is prolonged.

Description

technical field [0001] The application belongs to the field of water chillers, and in particular relates to a compound evaporative cooling chiller and a control method and device thereof. Background technique [0002] Chillers are also called freezers, refrigeration units, ice water units or cooling equipment. The chiller is a chilled water supply system that provides chilled water with a relatively stable temperature for chilled water air conditioners. By exchanging heat between the used chilled water and outdoor air, the system can provide chilled return water with a temperature lower than that of the used chilled water, so as to facilitate operations such as cooling through the chilled water return. [0003] During the use of the chiller, it may encounter cold weather. When the temperature in cold weather is below zero, the pipeline of the chiller will freeze and damage the pipeline of the chiller, which is not conducive to improving the service life of the product. C...

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Problems solved by technology

[0004] In view of this, the embodiment of the present application provides a compound evaporative cooling chiller and its control method and device to solve the cold weather that may be encountered during the use of the chiller in the prior art. When the temperature of the cold weather is low When the temperature is below zero, the pipeline of the chiller will freeze and damage the pipeline of the chiller, which is not conducive to improving the service life of the product

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