Liquid cooling system utilizing condensation heat to be self-adaptive to refrigerating capacity

Abstract

The invention discloses a liquid cooling system utilizing condensation heat to be self-adaptive to refrigerating capacity, and the system comprises a refrigerating system and a cooling liquid circulating system; the refrigerating system comprises a compressor, a condenser, an expansion valve and an evaporator, which are sequentially and circularly connected with one another, and the evaporator is provided with a liquid return inlet and a liquid return outlet; the cooling liquid circulating system comprises a solution tank which is connected with the liquid return outlet of the evaporator, and the liquid return inlet of the evaporator and an outlet of the solution tank are respectively connected with a user side; and an air outlet of the compressor is connected with an air distributing valve, a liquid inlet of the expansion valve is connected with a liquid inlet valve, a heat exchanger is arranged inside the solution tank, the air distribution valve is connected with an inlet of the heat exchanger, and the liquid inlet valve is connected with an outlet of the heat exchanger. The condensation heat discharged by the compressor is used for heating solution inside the solution tank, simultaneously the low-temperature liquid refrigerant after the heat exchanging and the normal-temperature high-pressure liquid refrigerant discharged by the condenser enter the evaporator to exchange heat and evaporate. By controlling the flow situation of the refrigerant and the solution, the supplementary cooling amount of the solution inside the solution tank can be controlled.

Description

[0001] technical field [0002] The invention relates to the field of cooling equipment, in particular to a liquid cooling source system that uses condensation heat to adapt to cooling capacity. Background technique [0003] The cooling capacity of the air-conditioning and refrigeration system usually needs to be adjusted by configuring an unloadable compressor. Among the unloadable compressors, although there are frequency conversion compressors with small cooling capacity and screw compressors with large cooling capacity, they can achieve greater cooling capacity. The range can be adjusted smoothly, but in more cases, you can only choose a single compressor with a limited number of stages, or use multiple compressors in parallel to achieve multi-stage unloading. The above unloading method can realize the preliminary adjustment of cooling capacity, and can also realize energy-saving operation when the required cooling capacity is small, so it is often adopted. However, for...

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Problems solved by technology

However, for some users with high cooling requirements, severe load changes, and demanding temperature fluctuation range, the refrigeration system is still difficult to meet the adjustment requirements. After all, the unloading stages of the compressor are limited; The life of the compressor is greatly reduced, which affects the reliability of the system; the frequency conversion technology will often not be used due to concerns about electromagnetic interference; and the general compressor is not suitable for long-term operation at a lower partial load state, otherwise it will cause compression The safety problem of machine operation, especially the oil return problem, or the system cost is too high

The Chinese patent "A self-adaptive cooling capacity liquid cooling system" (patent authorization announcement number CN 201476392) mainly adopts the parallel connection between the compressor outlet and the evaporator inlet in the conventional liquid cooling system refrigeration pipeline and the condenser and expansion valve The branch circuit of the hot gas bypass valve, through the bypass valve senses the change of the inlet pressure of the evaporator and automatically opens or closes to realize the cooling capacity adjustment, which is theoretically feasible, but due to the mechanical characteristics of the hot gas bypass valve, it is difficult for this type of system to automatically adapt to the The liquid temperature requirement often changes significantly, and due to the nature of the valve’s on-off adjustment, the adjustment accuracy is limited. At the same time, the problem of excessive compressor discharge temperature caused by hot gas bypass must be solved.

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