Big supercooling degree completely fresh air air processing machine set

Abstract

The invention provides a machine set. An outdoor processing unit heat exchanger consists of two parallel condenser tubes; and a supercooler is positioned between the two parallel condenser tubes of the outdoor processing unit heat exchanger. The refrigeration / heat cycle of the machine set is as follows: in a working condition of refrigeration, a refrigerant is condensed and supercooled, and then sent to an indoor air supply unit heat exchanger for heat exchange, and finally returned to a compressor, and the whole refrigeration cycle process is completed; and in the working condition of heating, the refrigerant is sent to the indoor air supply unit heat exchanger for heat exchange through the compressor, enters the supercooler for supercooling, enters the outdoor processing unit heat exchanger, and finally is returned to the compressor, and the whole heating cycle process is completed. Because the refrigerant is supercooled after a reservoir, the problem of lowering the supercooling degree is solved; because the supercooler is positioned between the two parallel condenser tubes of the outdoor processing unit heat exchanger, a strong airflow field formed on the middle part of a fan can be effectively utilized, and the actual supercooling effect of the system can be improved; and because of big suppercooling degree of the system, the operating stability and reliability of an expanding valve are improved, and the refrigerating capacity and the refrigerating energy efficiency of the system are also improved.

Description

Technical field: [0001] The invention relates to a fresh air handling unit, in particular to a fresh air handling unit with a large supercooling degree. In this system, the refrigerant passes through the high-pressure accumulator and then enters the subcooler located in the middle of the heat exchanger of the outdoor processing unit. The system can stably achieve an effective subcooling above 8°C, which is conducive to the stable operation of the expansion valve, increases the cooling capacity of the system, and improves the energy efficiency ratio of the system. It belongs to the technical field of building environment and equipment engineering. Background technique: [0002] At present, the vast majority of direct evaporative fresh air air handling units do not have subcooling equipment, and a small number of systems are equipped with subcoolers. The location of the subcooler often greatly affects the actual subcooling effect of the system. This will bring a series of pr...

AI Technical Summary

Problems solved by technology

[0002] At present, the vast majority of direct evaporative fresh air air handling units do not have subcooling equipment, and a small number of systems are equipped with subcoolers, and the actual subcooling effect of the system is often greatly affected by the location of the subcooler.

This will bring a series of problems, such as unstable operation of the expansion valve, low cooling energy efficiency ratio (EER), insufficient cooling capacity, etc.

These all affect the use effect of the direct evaporative fresh air air handling unit to a certain extent

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