Refrigeration cycle system and refrigeration method thereof

Abstract

The invention relates to a refrigeration cycle system and a refrigeration method. The refrigeration cycle system includes a compressor, a first heat exchange unit, a second heat exchange unit, a cold source, a refrigerant pump, and a cooling unit. The second heat exchange unit includes an inner heat exchange unit, External heat exchange unit. The compressor, the first heat exchange unit, and the inner heat exchange unit are connected in sequence through pipelines to form an indoor refrigeration cycle circuit, and the compressor compresses the refrigerant and circulates in the indoor refrigeration cycle circuit; the first heat exchange unit corresponds to the outdoor, so that the first heat exchange unit The heat unit can exchange heat with the outside. The cold source, the refrigerant pump, the external heat exchange unit, and the cooling unit are sequentially connected through pipelines to form an outdoor refrigeration cycle. The cold source is used to store the refrigerant, the refrigerant pump provides power for the refrigerant cycle, and the refrigerant flows through the external heat exchange unit to exchange heat with the indoor heat source. Refrigerant is used outdoors to participate in heat exchange to prevent circulating water or frozen water from entering the indoor computer room, causing water leakage in the computer room; outdoor refrigerant will not have the risk of freezing in winter.

Description

technical field [0001] The present invention relates to the field of refrigeration systems, and more particularly, 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 use 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 coils in the machine room, or the joints such as solder joints or water valve flanges, it will cause the circulating water to enter the machine room, causing safety accidents in the machine room, or causing frequent alarms from the water leakage sensor; [0005] 2. Under the condition of low outdoor temperature, it is easy to cause the coil to freeze and unable to carry out the normal water supp...

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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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