Canal evaporator

Abstract

The invention relates to a tube evaporator, belongs to the thermal equipment technical area. The air heating tube evaporator includes the evaporator export of the liquid vapor (1), fin (2), overheating segment (3), gas collection and exhaust port (5), the evaporator import of liquid (6), snake heat exchange segment( 9), snake heat tube (10), divider (11). The one end of the snake heat tube (10) is sealed by another end of the evaporator export of liquid vapor (1), it is divided into overheating segment (3) and the snake heat exchange segment (9) by the divider (11), and in the tube has the porous layer; the top pf the exhaust-gas tube and the gas collection tube (4) in the snake tube connect the top of the divider (11) which is located in the overheating segment (3). The remaining liquid of the evaporation returns to the evaporator import of liquid (6) and cycles evaporation; the invention also provides a fluid heat-pipe evaporator. The invention has high- heat exchange performance, is conducive to maintain the efficient evaporation process; simple processing, enhanced the work efficiency and the adapt ability of the evaporator.

Description

technical field [0001] The invention relates to a novel high-efficiency in-pipe evaporator, which belongs to the technical field of thermal equipment. Background technique [0002] In-pipe evaporator is a kind of thermal equipment, which is widely used in power, chemical industry, air-conditioning engineering and refrigeration engineering, such as refrigerators, freezers, air-conditioning systems, chemical and petrochemical process evaporators, etc. There are two main forms, one is liquid heating type, such as the common casing evaporator; the other is air heating type, such as household air conditioners, large refrigeration devices, etc. [0003] Figure 1 is a household split air conditioner evaporator, which consists of evaporation tubes and fins outside the tubes. Among them, 100-evaporated liquid (refrigerant for the air-conditioning refrigeration system) vapor outlet, 200-evaporated liquid (refrigerant for the air-conditioning refrigeration system) inlet, 300-pipe oute...

AI Technical Summary

Problems solved by technology

At the same time, this single tube-side evaporation and boiling process will inevitably lead to complex gas-liquid two-phase flow

When there is a two-phase flow in the tube, the gas-liquid will be in the flow pattern of bubble, gas plug, ring or stratified flow according to the dryness, which will greatly increase the flow resistance and operation instability, and control the operation of the system, etc. have a very negative impact on

Although the annular flow and the thin liquid film evaporation flow pattern have good heat transfer performance, they account for a small proportion in the entire process, and their contribution to the heat transfer of the overall system is very limited, and due to stratification factors, the inside of the tube will be partially dried up. A large amount of liquid phase gathers in the bottom layer of the tube and cannot spread well to every surface in the tube, forming a convective boiling state of liquid film with strong heat transfer effect, which greatly weakens the effect of surface strengthening measures

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