Multi-stage gas homogenizing pore plate structure and flooded evaporator for preventing suction with liquid

Abstract

The invention discloses a multi-stage gas homogenizing pore plate structure and a flooded evaporator for preventing suction with a liquid. In the multi-stage gas homogenizing pore plate structure, pore diameters of through holes in each pore plate are formed in a gradual changing mode according to the distance to a suction port of external equipment, and the farther the distance to the suction port is, the greater the diameters of the through holes are. When an air flow enters a baffle plate structure from the lower pore plate, liquid state substances mixed in the air flow are baffled and separated out of the suction port by means of the multi-stage gas homogenizing pore plate structure. The multiple multi-stage gas homogenizing pore plates are combined to play a better flow field homogenizing role, so that a high speed flow field centralized region below the gas homogenizing structure is eliminated, the air flow speed is reduced, and liquid drops are prevented from being taken away bygas. When gas-liquid two phases flow through the multi-stage gas homogenizing pore plates, the accelerating time of the liquid drops is short, the speed is relatively low, and the gas and liquid separated and collided with the next stage gas homogenizing pore plate are unlikely to break, so that the condition that broken relatively small liquid drops follow gas continuously to penetrate the multi-stage gas homogenizing pore plate structure is prevented.

Description

Technical field [0001] The invention belongs to the technical field of refrigeration, and in particular relates to a flooded evaporator capable of preventing suction and liquid entrainment. Background technique [0002] In the evaporator of air-conditioning equipment, the liquid refrigerant enters the evaporator through the throttling device and performs pool boiling heat exchange with the refrigerant. The liquid level of the refrigerant always maintains a certain level during the whole process, so the liquid refrigerant It has better wettability to the heat transfer wall, and the boiling heat transfer coefficient is higher. On the other hand, the heat exchange area has also been fully and effectively used, and the heat exchange efficiency of the unit has also been greatly improved. However, because of the violent heat exchange, the refrigerant is often in a boiling state, and the liquid droplets produced by the bubble burst at the liquid surface will be carried by the vaporized...

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Problems solved by technology

[0005] There are other gas-liquid separation structures that use non-planar or curved baffles. The main problem is that most of the separated droplets will fall back from the lowest point of the non-planar or curved baffles, such as the center of the V-shaped plate, forcing The air flow flows into the compressor from the side holes on both sides of the plate, the flow path is long and the pressure drop is large; in addition, only one layer of plates forms the impact, and the gas-liquid separation efficiency is low

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