Pure reverse flow dry evaporator device and use method thereof

Abstract

The invention relates to a pure reverse flow dry evaporator device and a use method thereof. The ordinary dry evaporator channel box generally used at present adopts multiple paths and has declined heat transfer performance caused by incomplete gasification. In the technical scheme, gas-liquid refrigerant mixture is divided more evenly by a distributing pore plate in the channel box. The pure reverse flow dry evaporator device consists of a liquid feeding pipe, a channel box, a first-level distributing pore plate, a second-level distributing pore plate, a cylinder, a refrigerating medium outlet, an evaporating pipe bundle, a baffle plate, a refrigerating medium inlet, a pipe plate and an exit pipe. The invention has the advantages that the distributing pore plate and the baffle plate device are used for realizing single-flow pure reverse flow heat exchange, thereby ensuring compact structure, convenient production and low processing cost; the gas-liquid refrigerant mixture is divided more evenly, improves the energy efficiency and heat transfer performance by 15-20 percent than the ordinary dry evaporator and reduces the pressure by 10 percent.

Description

technical field [0001] The invention relates to a heat exchange container device in a refrigerating and air-conditioning system, in particular to an evaporator device in the refrigerating and air-conditioning system and its usage method. Background technique [0002] The main components in the refrigeration and air conditioning system include: compressors, oil separators, condensers, liquid receivers, expansion valves, evaporators and other pipelines and electronic control equipment. The refrigeration cycle process is that the high-pressure superheated refrigerant and the refrigerated oil gas phase mixture discharged from the compressor pass through the oil separator for gas-liquid two-phase separation, and then the refrigerant enters the condenser and condenses into a high-pressure superheated refrigerant through the normal temperature refrigerant. The cold liquid, after throttling by the expansion valve, is vaporized in the evaporator through the normal temperature brine t...

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Problems solved by technology

[0003] In the refrigeration and air-conditioning system, the common dry evaporator usually used at present has the following defects: 1) Firstly, due to the multiple processes of the tube-box separation of the gas-liquid refrigerant mixture in the evaporator, the shell-side refrigerant and the The flow direction of the gas-liquid refrigerant in the tube side is in a forward and reverse state, resulting in an increase in pressure drop and a decrease in energy efficiency; 2) Secondly, due to the uneven liquid separation in the tube box of the gas-liquid refrigerant mixture in the evaporator, the gas-liquid refrigerant undergoes heat exchange The final gasification process is insufficient, resulting in a decline in heat transfer performance; 3) Since the tube box of the common evaporator adopts multiple processes, it has complex structures, high sealing requirements, and difficult processing, resulting in high processing costs, uneconomical, and unfavorable energy saving

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