A control method of a natural cooling refrigeration system

Abstract

The invention discloses a control method of a natural cooling refrigeration system. The key points of the technical scheme are that it includes an energy regulation control device, a natural cooling coil, a heat exchanger, a water chiller, and a frozen aqueous solution. The energy regulation control device is a linear three-way valve , frequency conversion water pump, frequency conversion fan, any two of them can be used at the same time, or all three of them can be used at the same time. When the refrigeration system is in operation, set the conditions ①②③, and decide whether to open the natural cooling according to the satisfaction of the conditions Coil, when the refrigeration system is off and the free cooling coil is off, set the conditions ④⑤⑥, and decide whether to turn on the free cooling coil according to the satisfaction of 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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