Rail vehicle air conditioning unit using L-shaped condensers

Abstract

A rail vehicle air conditioning unit using L-shaped condensers comprises a box which comprises an evaporation cavity and a condensation cavity. The evaporation cavity and the condensation cavity are separately used for mounting an evaporation unit and a condensation unit which mainly comprises compressors, throttle devices, the condensers and condensation fans. The evaporation unit mainly comprises an evaporator. The rail vehicle air conditioning unit is characterized in that the condensers are L-shaped condensers; each L-shaped condenser comprises an L-shaped condensation fin set formed by a plurality of sets of L-shaped condensation fins; each L-shaped condensation fin set comprises a first condensation fin set body and a second condensation fin set body which are perpendicular to each other, wherein an arc transition fin set body is arranged between the first condensation fin set body and the second condensation fin set body; inlet section collection pipes and outlet section collection pipes are located at the vertical ends of one sides of the L-shaped condensation fin sets; the inlet section collection pipes are connected with the compressors, and the outlet section collection pipes are connected with the evaporator through the throttle devices; and the evaporator is connected with the compressors. The rail vehicle air conditioning unit adopts the L-shaped condensers, and the efficient, low-weight and small-size development requirements of the rail vehicle air conditioning unit are met.

Description

technical field [0001] The invention belongs to the technical field of rail vehicle refrigeration systems, and relates to a rail vehicle air-conditioning unit, in particular to an rail vehicle air-conditioning unit using an L-shaped condenser. Background technique [0002] As one of the main components of rail vehicles, the air conditioning unit plays a role in ventilation, adjusting the air temperature and humidity in the vehicle, and improving the comfort performance of the vehicle, and plays a key role in the vehicle environmental control system. [0003] The condenser is a key component for heat exchange of the working fluid. The condenser of the existing tram air-conditioning unit is a traditional copper tube-fin structure, usually a long straight tube-fin condenser, placed vertically, and the working fluid is in the The copper tube flows, the air passes outside the copper tube, and the heat exchange is performed through the tube wall and the aluminum fins. Disadvantag...

AI Technical Summary

Problems solved by technology

Disadvantages of this long and straight condenser: many rows, large resistance, poor heat transfer effect, long dimension required in the length direction, need to occupy the space of other cavities, the length of the air conditioning unit will be longer, and the weight will be heavy

At present, tram air-conditioning units generally use long straight tube-fin condensers, and the overall length is relatively long. Due to the limited space on the top of the vehicle, although it can currently meet the performance requirements of the existing tram air-conditioning system, it is difficult to achieve Requirements for Lighter and Miniaturized Tram Air Conditioning Systems

In the existing tram air-conditioning units, the traditional conventional long straight tube-fin condenser technology has been developed maturely and has been used for a long time. The higher requirements put forward by air conditioning units, so the traditional long straight condenser type is gradually facing challenges

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