Refrigerating cycle system and refrigerating method thereof

Abstract

The invention relates to a refrigerating cycle system and a refrigerating method. The refrigerating cycle system comprises a compressor, a first heat exchange unit, a second heat exchange unit, a cold source, a refrigerating fluid pump and a cooling unit. The second heat exchange unit comprises an inner heat exchange unit and an outer heat exchange unit. The compressor, the first heat exchange unit and the inner heat exchange unit are sequentially connected through pipelines to form an indoor refrigerating cycle loop. The compressor compresses refrigerant in the indoor refrigerating cycle loop to circulate. The first heat exchange unit corresponds to the outside so that the first heat exchange unit can perform heat exchange with the outside. The cold source, the refrigerating fluid pump, the outer heat exchange unit and the cooling unit are sequentially connected through pipelines to form an outdoor refrigerating cycle loop. The cold source is used for storing refrigerating fluid, the refrigerating fluid pump provides power for refrigerating fluid circulation, and the refrigerating fluid flows past the outer heat exchange unit to conduct heat exchange with an indoor heat source. The refrigerating fluid is adopted outdoors to participate in heat exchange, and the phenomenon that circulating water or chilled water enters an indoor machine room to cause water leakage of the machine room is avoided. The freezing danger of the refrigerating fluid outdoors in winter can be avoided.

Description

technical field [0001] The invention relates to the field of refrigeration systems, more specifically, to a refrigeration cycle system and a refrigeration method thereof. Background technique [0002] At present, the dual cooling source units or dual coil units used in many large data centers adopt compressor mode and chilled water mode for cooling. [0003] The compressor water cooling solution or the chilled water dual cooling source application solution has the following risks: [0004] 1. Circulating water is introduced into the machine room. If there is leakage in the coil pipes, solder joints, or water valve flanges in the machine room, the circulating water will enter the machine room, causing safety accidents in the machine room, or frequent alarms from the water leakage sensor; [0005] 2. In the case of outdoor low temperature, it is easy to cause the coil to freeze and cannot carry out the normal water supply cycle, so that the refrigeration unit of the compresso...

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Problems solved by technology

[0004] 1. Circulating water is introduced into the machine room. If there is leakage in the coil pipes, solder joints, or water valve flanges in the machine room, the circulating water will enter the machine room, causing safety accidents in the machine room, or frequent alarms from the water leakage sensor;

[0005] 2. In the case of outdoor low temperature, it is easy to cause the coil to freeze and cannot carry out the normal water supply cycle, so that the refrigeration unit of the compressor water cooling solution cannot operate normally, which will reduce the cooling capacity of the air conditioning unit in the computer room, and there is a risk of overheating in the computer room;

[0006] 3. The energy-saving effect is poor, and the natural cooling source under the low temperature outdoor condition cannot be fully utilized;

[0007] 4. The site involves the layout of cooling water pipelines or circulation system pipelines such as chilled water hosts. The pipeline layout is relatively complicated, and the cost of supporting construction will increase

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