Energy-saving high-temperature-resistant subway train air conditioning

Abstract

The invention discloses an energy-saving high-temperature-resistant subway train air conditioning. The energy-saving high-temperature-resistant subway train air conditioning is structurally characterized in that: under the condition of not changing the size of the subway train air conditioning, four scroll compressors, an R134a refrigeration agent, two sets of double-loop evaporators, two sets ofdouble-loop condensers, four expansion valves, four solenoid valves and related refrigeration accessories are adopted; the four scroll compressors are rigidly connected with a base plate; then the four scroll compressors and the base plate are arranged on a bottom plate of the air conditioning through four shock absorber assemblies; and the four scroll compressors are set to be four independent loops, and can be subjected to temperature adjustment according to 25 percent, 50 percent, 75 percent and 100 percent of the load of a coach; and a new ventilation door structure under infinitely variable control is arranged on a new air inlet. The invention has the advantages that: the energy-saving high-temperature-resistant subway train air conditioning has low using cost, and can perform four-gear temperature adjustment, the compressors are protected, the power consumption is reduced, the problem that the subway train air conditioning cannot run at the high temperature of more than 46 DEG Cis solved, new air is adjusted effectively to save energy, and the whole shock absorption effect is good.

Description

technical field [0001] The invention relates to the technical field of design and manufacture of vehicle air conditioners, in particular to an air conditioner used in rail transit carriages, and is an energy-saving and high-temperature-resistant subway train air conditioner. Background technique [0002] At present, the air-conditioning units of the A-type carriages of rail transit subway trains use the air-conditioning system with refrigerant R407c. Due to the structural characteristics of the system and the physical characteristics of the refrigerant R407c, it can only be unloaded at a high temperature of 46°C. When the ambient temperature is higher than 48°C, the exhaust temperature of the compressor of the air conditioning system will be higher than 30bar At this time, the heat exchanger, refrigeration accessories and pipelines of the air conditioning system will not work normally and need to be shut down. When the ambient temperature is higher than 50°C, it only has th...

AI Technical Summary

Problems solved by technology

The air-conditioning units of the current A-type carriages of subway trains generally do not install a fresh air door or only install a damper with a switch at the fresh air outlet. The fresh air volume in the car is designed according to the situation when the passengers are full. The load of fresh air volume accounts for a very large part, which increases the power consumption of subway trains

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