Transcritical carbon dioxide continuous ice-making cycle control system and control method thereof

Abstract

The invention discloses a transcritical carbon dioxide continuous ice-making cycle control system and a control method thereof. According to the transcritical carbon dioxide continuous ice-making cycle control system, an ice-making cycle suitable for carbon dioxide and provided with an ejector and a heat regenerator is provided, and the COP of carbon dioxide in a low-temperature refrigeration areacan be greatly improved; along with the trend of later refrigerant use to environmental protection and maturity of a carbon dioxide refrigeration technology, carbon dioxide can well replace traditional refrigerants; double evaporators are connected in parallel, so that a second ice-making evaporator continuously makes ice without intervals while a first ice-making evaporator is used for deicing,the situation that a refrigerant is not used for refrigeration during deicing is reduced, the ice-making time is shortened, and the ice-making yield in unit time is increased; inlet gas of a compressor is carbon dioxide gas coming out of a gas phase outlet of a gas-liquid separator, no liquid exists, and the situation that in the prior art, during deicing, a small part of hot gas releases heat andis liquefied in the evaporator, gathered liquid enters the compressor, and liquid impact is caused to the compressor is avoided; and continuous ice making is achieved, and the ice-making efficiency is improved.

Description

technical field [0001] The invention relates to ice-making technology, in particular to a transcritical carbon dioxide continuous ice-making cycle control system and a control method thereof. Background technique [0002] As my country's objective demand for cold chain continues to increase, the ice-making industry will gradually have broad market prospects as people's lifestyles change. Two important aspects of current ice making systems are an environmental perspective and energy costs. Some traditional refrigerants that are harmful to the environment have been excluded from the market, carbon dioxide (CO 2 ) as an environmentally friendly natural refrigerant, has superior environmental friendliness, excellent thermodynamic properties, CO 2 It is considered an ideal refrigerant replacement for ice making systems. [0003] Because traditional refrigerants HCFCs, HFCs, and CFCs are detrimental to the ozone layer, they will gradually face elimination and replacement. The n...

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Problems solved by technology

[0005] Aiming at the problem that the traditional commonly used refrigerants such as R22, R134a and R404A in the current ice-making industry are not friendly to the environment, and the low-efficiency low-temperature ice-making cycle of carbon dioxide, the present invention proposes a transcritical carbon dioxide continuous ice-making cycle control system and its Control Method

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