Control method of combined type air-conditioning system with natural cooling function

Abstract

The invention discloses a control method of a combined type air-conditioning system with a natural cooling function. The control method of the combined type air-conditioning system with the natural cooling function is characterized in that the system comprises a compressor module, an air-cooling heat exchange module, a multifunctional liquid storage device, a liquid pump, an air treatment module and control valves, wherein the air-cooling heat exchange module is composed of a heat exchanger assembly and a cooling fan; and the control method comprises the step that the three different work modes including a compression refrigeration work mode, a compression refrigeration and natural cooling coordinated operation combined refrigeration work mode and the natural cooling work mode are achieved by operating the control valves to change the flowing path of refrigeration media. According to the control method of the combined type air-conditioning system with the natural cooling function, fuzzy control is used for adjusting the refrigeration capacity, natural cooling is used for replacing compression refrigeration in low-temperature or transition seasons, natural cold resources are efficiently utilized, the control method is particularly suitable for control over the work environments of data centers, high-performance computers, communication base stations and power electronic equipment, and the energy consumption and operating cost of the air-conditioning system are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of refrigeration and air conditioning, in particular to a control method for a composite air conditioning system with a natural cooling function. Background technique [0002] The rapid development of information industry and digital construction has promoted the number of data computer rooms and communication base stations, and the construction scale has grown rapidly. According to statistics, the energy consumption of computer rooms and base station air conditioners accounts for 35% to 50% of the total energy consumption. The sensible heat load ratio of the computer room and base station is large. In order to maintain a suitable working environment temperature, it is necessary to run the air conditioner all year round. In the season when the indoor temperature is higher than the outdoor ambient temperature, especially in low temperature seasons or cold regions, conventional data The air conditioning system...

AI Technical Summary

Problems solved by technology

[0008] Chinese invention patent ZL201210037082.8 discloses a heat pipe air-conditioning system for computer rooms and its control method. The invention couples a separate heat pipe module and a compression refrigeration module through a condensing evaporator, and has three working modes: compression refrigeration, composite refrigeration and heat pipe refrigeration. , the secondary heat exchange is completed in the condensing evaporator, and the cooling capacity is delivered to the cold side through the secondary refrigerant. Its disadvantages are: first, there is a large irreversible heat transfer loss in the secondary heat exchange; second, it is necessary to add a condensing evaporator , such as shell and tube heat exchangers, or several plate heat exchangers; the third is the need for secondary refrigerant

This not only reduces energy efficiency and increases manufacturing costs, but also adds difficulty to the structural layout and manufacturing process of the unit

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