Refrigerant charge determination method of refrigeration system and refrigeration system

Abstract

The invention discloses a refrigerant charge determination method of a refrigeration system. The method comprises the following steps that working condition parameters of the refrigeration system, thespeed of refrigerant gas, the speed of refrigerant liquid, the length of a first pipeline and the length of a second pipeline are acquired, wherein the first pipeline is a pipeline through which therefrigerant gas flows from an evaporator to a condenser, and the second pipeline is a pipeline through which the refrigerant liquid flows from the condenser to the evaporator; the mass flow rate of the refrigeration system is acquired according to the working condition parameters of the refrigeration system; the single cycle time of the refrigeration system is acquired according to the speed of the refrigerant gas, the speed of the refrigerant liquid, the length of the first pipeline and the length of the second pipeline; the evaporation amount of the refrigeration system in any one-time cycletime is acquired according to the mass flow rate and the single cycle time; and the refrigerant charge after each cycle is determined based on the evaporation amount. According to the method, the charge can be quickly determined, and the charge of the refrigeration system can be accurately controlled.

Description

technical field [0001] The invention relates to the technical field of refrigeration cycles, in particular to a method for determining the refrigerant charging amount of a refrigeration system and the refrigeration system. Background technique [0002] At present, compared with carbon dioxide refrigerant and freon refrigerant, ammonia refrigerant has the advantages of simple preparation process, low price, no damage to the ozone layer, no greenhouse effect, large latent heat of vaporization, high refrigeration and heat release coefficient, etc., and is widely used in Large-scale cold storage, supermarket food display cabinets and other places. However, due to the disadvantages of ammonia refrigerants such as toxicity (low value) and explosiveness, for safety considerations, my country has certain requirements for the amount of ammonia refrigerant in the refrigeration system, specifically to meet the requirements of system operation. In the case of the situation, reduce the c...

AI Technical Summary

Problems solved by technology

However, due to the disadvantages of ammonia refrigerants such as toxicity (low value) and explosiveness, for safety considerations, my country has certain requirements for the amount of ammonia refrigerant in the refrigeration system, specifically to meet the requirements of system operation. Under the circumstances, reduce the charging amount of the ammonia refrigeration system as much as possible

Although there are certain requirements for the amount of refrigerant charge in China, there is no specific method for determining the amount of charge, which leads to a cumbersome process for determining the amount of charge and relatively low accuracy, which also makes domestic refrigeration systems The design is not in line with international design

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