Unitary air-conditioning unit of subway vehicle and control method thereof

Abstract

The invention discloses a unitary air-conditioning unit of a subway vehicle and a control method thereof, which belong to the field of air-conditioning ventilation systems of subway vehicles. The unitary air-conditioning unit comprises at least two independent refrigeration loops, wherein each refrigeration loop comprises a compressor, a condenser communicated with one end of the compressor and an evaporator coiled pipe communicated with one end of the condenser; the evaporator coiled pipe is communicated with the other end of the compressor to form a closed loop; the evaporator coiled pipe is positioned in an evaporator; an air feeder is arranged on one side of the evaporator; and at least two parallel compressors are arranged in each independent refrigeration loop. The control method is realized by adjusting the starting and stopping number of the compressors in various independent refrigeration loops according to the detected refrigeration load capacity in the vehicle, so that the refrigeration loops for working are the most. The invention has the advantages of multistage adjustment of refrigerating capacity, full utilization of the heat exchange area of the condenser and the evaporator, high refrigeration efficiency, good energy-saving effect, high uniformity for air temperature in the vehicle, small temperature fluctuation and high comfort feeling for passengers.

Description

technical field [0001] The invention relates to an air-conditioning and ventilation system for a subway vehicle, in particular to a unitary air-conditioning unit for a subway vehicle and a control method thereof. Background technique [0002] At present, domestic subway vehicle air conditioning units generally use two independent refrigeration circuits, such as figure 1 As shown, each circuit includes a compressor 1 with a power of about 6.5KW, a condenser 2 connected to the compressor 1, and an evaporator coil 6 connected to the condenser 2; the evaporator coil 6 is connected to the Compressor 1 is connected. Two sets of parallel evaporator coils 6 are included in the independent refrigeration circuit, and two sets of parallel evaporator coils 60 are included in the other independent refrigeration circuit. One set of evaporator coils 6 of the independent refrigeration circuit is connected to another independent A group of evaporator coils 60 of the refrigeration circuit i...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the existing subway vehicle air-conditioning unit, such as large cooling capacity adjustment span, inaccurate temperature control, uncomfortable passengers, low energy efficiency, and large energy consumption, an object of the present invention is to provide a subway vehicle unitary air-conditioning unit, The air conditioner unit can adjust the cooling capacity in multiple stages according to the cooling demand, the temperature control in the car is more precise, the temperature fluctuation is small, and the energy saving effect is remarkable, and the passenger comfort is good

Images