Refrigerant cooling method, refrigerant cooling system

Abstract

The invention provides a refrigerant cooling method. The refrigerant cooling method includes steps of 1, conveying refrigerant discharged from a refrigerant consuming device after heat exchanging to a heat exchanging device for cooling; 2, conveying cool refrigerant to a pump, and detecting a parameter difference between the inlet and outlet of the pump; 3, when the parameter difference is smaller than a preset difference, returning the cool refrigerant to the heat exchanging device; when the parameter difference is larger than the preset difference, conveying the cool refrigerant to the refrigerant consuming device. The invention further provides a refrigerant cooling system. By means of the refrigerant cooling method and the refrigerant cooling system, the system can be adjusted according to the parameter difference between the inlet and outlet of the pump, and cavitation can be avoided.

Description

technical field [0001] The invention relates to a refrigerant cooling method and a refrigerant cooling system. Background technique [0002] The traditional air-conditioning cooling system (or it can be called the heat dissipation system) adopts the cooling method of air-conditioning chiller + fan coil unit. Because it uses the direct contact between the refrigerant water and the air to exchange heat, it has limitations such as low heat exchange efficiency. Meet the heat dissipation requirements of high-density server rooms, and the air-conditioning cooling system using pumps uses liquid refrigerants, which is superior to traditional air-conditioning cooling systems in terms of cooling effect, and uses pumps (in the case of fluorine, it can also be called The energy-saving performance of the air-conditioning cooling system of the fluorine pump) has been generally recognized. Although its cost is slightly higher than that of the general air-conditioning cooling system, the en...

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Problems solved by technology

[0003] When the system is cold started or the side load of the indoor unit (which has an evaporator inside) is small, since the refrigerant in the liquid pipe of the evaporator of the indoor unit has no or small evaporation in the system cycle with a pump, the When the cooling capacity of one side does not change, when the temperature difference between the pump inlet and outlet is too small or the pressure difference does not change significantly, it is very easy to cause cavitation in the pump, resulting in pump damage and system stagnation.

[0004] Aiming at the problem of cavitation and damage to the pump due to the small change in the difference between the inlet and outlet parameters of the pump in the related art when it is running under low load, no effective solution has been proposed so far

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