Control method for combined refrigerating multi-split air conditioner system

Abstract

The invention discloses a control method for a combined refrigerating multi-split air conditioner system. The multi-split air conditioner system is characterized in that two or more outdoor combined refrigerating modules are arranged the outdoor side to form a cold source system of the multi-split air conditioner system, each outdoor combined refrigerating module is composed of a first refrigerant vapor compression and refrigeration circulating loop and a second refrigerant circulating loop, one or more direct evaporation type indoor air cooler modules are arranged at the indoor side, and a refrigerant storing and conveying unit is connected with the part between each outdoor combined refrigerating module and the corresponding indoor air cooler module to form a closed circulating system through a liquid collecting tube, a main liquid supply tube and a main air return tube. According to the control method for the combined refrigerating multi-split air conditioner system, the number of the indoor and outdoor modules is decided according to the designed thermal load of an air conditioner, and the control method precisely regulates the refrigerating capacity to meet the heat control needs of round-the-clock running data machine rooms and electronic equipment; the control method for the combined refrigerating multi-split air conditioner system is capable of making the maximum use of the natural cold source of the day and night, transition season and winter so as to realize the great energy conservation and emission reduction of the air conditioner system.

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 refrigeration multi-connected air conditioning system capable of maximizing the use of natural cold sources to transport heat at low cost. 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 40% to 50% of the total energy consumption. The sensible heat load ratio of computer rooms and base stations is large, and continuous cooling operation is required throughout the year. In the seasons when the indoor temperature is higher than the outdoor ambient temperature, especially in low-temperature seasons or cold regions, conventional air-condit...

AI Technical Summary

Problems solved by technology

This system makes up for the deficiencies of the previous two systems in terms of utilizing the cooling capacity of outdoor low-temperature air and ensuring indoor air quality. It has not been fully utilized; for the air conditioning system that implements GB / T 19413-2010, since the indoor temperature is set at 24°C, the outdoor ambient temperature when the compression refrigeration is converted to the heat pipe circulation refrigeration must be very low, and the utilization rate of the natural cooling source is low

[0007] Utility model patent ZL01278831.7 discloses an energy-saving refrigeration cycle device with a circulation pump. The use of a circulation pump in the heat pipe circulation system is conducive to improving the efficiency of the heat pipe cycle, and also simplifies the installation of the heat pipe system. However, ZL01278831.7 is similar to CN201010528027.X in terms of maximizing the use of the cooling capacity of outdoor low-temperature air, that is, the upper limit temperature of the heat pipe cycle must be low to smoothly connect with the refrigeration cycle

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