Control method of natural cooling refrigerating system

Abstract

The invention discloses a control method of a natural cooling refrigerating system. According to the technical scheme, the control method of the natural cooling refrigerating system is characterized by comprising an energy regulation control device, a natural cooling coil pipe, a heat exchanger, a water chilling unit and a chilled water solution; the energy regulation control device is any one, orany two or all of a linear three-way valve, a variable frequency water pump and a variable frequency draught fan; when the refrigerating system is in a running state, the conditions (1), (2) and (3)are set, and whether the natural cooling coil pipe is opened or not is determined according to the conditions; when the refrigerating system is in a shutdown state and the natural cooling coil pipe isin a closed state, the conditions (4), (5) and (6) are set, and whether the natural cooling coil pipe is opened or not is determined according to the conditions.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a control method for a natural cooling refrigeration system. Background technique [0002] The refrigeration system is composed of refrigerant and four major parts, namely compressor, condenser, expansion valve and evaporator. The volume of the steam is reduced and the pressure is increased. The compressor sucks the lower-pressure working medium steam from the evaporator, raises the pressure, and sends it to the condenser, where it is condensed into a liquid with a higher pressure. After being throttled by the throttle valve, it becomes a liquid with a lower pressure, and then it is sent to the evaporator, where it absorbs heat and evaporates to become a steam with a lower pressure, and then it is sent to the inlet of the compressor to complete the refrigeration cycle. [0003] At present, the Chinese patent with publication number CN 108151347 A discloses a refrigeration ...

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Problems solved by technology

[0004] Although this refrigeration system and its control method can determine the state of the oil level in the compressor by integrating the detection results of the first oil level detection part and the second oil level detection part, thereby controlling the state of the control valve to control the injection pipeline On and off, and then can realize the controllability of the oil return from the heat exchanger components to the compressor, but: the refrigeration system is still not energy-saving, efficient and stable enough, and cannot independently control the independent work of some components in the refrigeration system, and cannot guarantee Provide a relatively stable chilled water supply temperature throughout the year, and cannot accurately control the opening and closing of the refrigeration system and related components

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