Refrigerating system and operation method thereof

Abstract

The invention discloses a refrigerating system, comprising a compression refrigerating loop adopting compressional mode refrigeration, a natural cold energy refrigerating loop adopting natural cold energy refrigeration, and a control valve which can selectively control the compression refrigerating loop or the natural cold energy refrigerating loop to work, wherein the compression refrigerating loop comprises a compressor, a condenser, a throttle valve and an evaporator; the natural cold energy refrigerating loop comprises a condenser, a refrigerating fluid pump and an evaporator, wherein the refrigerating fluid pump is arranged between the condenser and the evaporator and is used for conveying refrigerating fluid in the condenser to the evaporator and providing pressure for refrigerating fluid circulation; therefore, when outdoor temperature is lower, the refrigerating system can operate without starting the compressor and the throttle valve; the energy consumption of the system is reduced; the circulation pressure of the refrigerating fluid is provided by the refrigerating fluid pump; and the operation of the refrigerating system is realized through natural cold energy. In addition, the invention also discloses an operation method of the refrigerating system.

Description

technical field [0001] The invention relates to a refrigeration system and its operating method, in particular to a refrigeration system capable of utilizing natural cooling energy to realize refrigeration and its operating method. Background technique [0002] The refrigeration principle of the refrigerator is that the compressor sucks in the lower-pressure refrigerant coming out of the evaporator, raises its pressure, and sends it to the condenser, where it condenses into a high-pressure and normal-temperature refrigerant, which is throttled by the throttle valve. Finally, it becomes a low-temperature and low-pressure refrigerant liquid, and then sent to the evaporator, where it absorbs heat and evaporates to become a lower-pressure refrigerant vapor, and then sent to the inlet of the compressor to complete the refrigeration cycle. [0003] The current refrigeration system is usually selected and configured according to the outdoor ambient temperature in summer. When the o...

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Problems solved by technology

[0003] The current refrigeration system is usually selected and configured according to the outdoor ambient temperature in summer. When the outdoor temperature is low in spring, autumn or winter, the condensing pressure will decrease. At this time, if there are still some indoor ambient temperatures that need cooling, they need to be closed. The condensing fan can increase the condensing pressure to meet the pressure difference between the inlet and outlet of the throttle valve, and the throttle valve will open, but the increase in the condensing pressure will increase the energy consumption of the compressor; if the condensing fan is not turned off, the throttle valve will be closed state, the refrigeration cycle will be interrupted and the refrigeration system will not work

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