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Air Conditioning System

Air Conditioning System consultation

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》East railway could provide different types of air condition units to meet different vehicle and functional needs.
》Adapt to a variety of environments, for high altitude, high cold, hot areas have a corresponding solution.
》It could work normally under natural conditions such as sand, rain, snow, sun and atmospheric corrosion.
》Flexible power supply: direct power supply, combined power supply or transformer-transformed power supply.
》Industry-standard safety performance and fire protection requirements
》Good sealing performance and reliable drainage structure ensure that condensate and rain do not enter the compartment.
》Set high and low voltage protection, defrost function, electromagnetic compatibility meets the standard.

Overview

The function of the vehicle air condition system is to maintain the temperature, relative humidity, air flow speed and cleanliness (mainly dust and carbon dioxide content in the passenger compartment) within the specified range to create a comfortable riding environment for passengers.



Classification

Divided into split type and unit type according to the structure type;
》Split air conditioning
Compressors, condensers, condenser fans, and liquid storage tanks are usually installed under the vehicle, and fans, evaporators, expansion valves, and air preheaters are placed at one end of the roof.The main shortcomings are large size, difficulty in disassembly and assembly, and inconvenient maintenance. At the same time, the refrigeration equipment has long pipelines and many joints, which are prone to leakage.Although there are shortcomings, due to the limited installation space reserved for the overall design of the vehicle, some models still need to use split air conditioners.
》Unit air conditioner
The unit air conditioning unit integrates a compressor, a condenser fan, a gas-liquid separator, a drying filter, a capillary (or expansion valve), a ventilator, an evaporator, and an air preheater into a single tank to form a complete unit., installed at one or both ends of the car body, and some are placed in the middle.

The characteristics of the centralized air conditioning unit: small size, light weight, compact structure, good interchangeability of the unit, convenient maintenance, and at the same time, because the air conditioning unit is installed in the vehicle, it can also avoid the waste water and dirt discharged from the vehicle body to the condenser.Corrosion, extending the life of the unit.

After the integration of centralized air conditioning units, the refrigeration equipment pipeline is greatly shortened, which not only saves a lot of non-ferrous metals, but also reduces leakage.

High-speed train air conditioning arrangements must reduce the installation center of gravity due to the high speed.Motor vehicles are generally used for unloading installations and wish to be air-conditioned units and design inductive ventilation.


Technical Requirements

（TB/T 1804；EN 14750）Air conditioning test item list

Instruction manual
Every air conditioner should be factory tested
New product trial-setting or type inspection every three years
No. Test items Ex-factory inspection Type test
Ordinary car Highland car High-speed car Ordinary car Highland car High-speed car
1 Operation test ● ● ● ● ● ●
2 Refrigeration system sealing test
 		 ● ● ● ● ● ●
3 Fault protection test --- --- --- ● ● ●
4 Water spray test ● ● ● ● ● ●
5 Insulation resistance test ● ● ● ● ● ●
6 Dielectric strength test ● ● ● ● ● ●
7 Rated cooling capacity test --- --- --- ● ● ●
8 Max.load cooling capacity test --- --- --- ● ● ●
9 Max. load refrigeration condition pressure regulation start test --- --- --- ● ● ●
10 Condensation test --- --- --- ● ● ●
11 Heat pump rated calorific value test --- --- --- ● ● ●
12 Heat pump maximum operating heating test --- --- --- ● ● ●
13 Safety test of electric heating device --- --- --- ● ● ●
14 Heat pump heating input power test --- --- --- ● ● ●
15 Refrigeration input power test --- --- --- ● ● ●
16 Electric heating rated heating test --- --- --- ● ● ●
17 Heat pump maximum operating heating and pressure regulation start test --- --- --- ● ● ●
18 Automatic defrosting test --- --- --- ● ● ●
19 Noise test --- --- --- ● ● ●
  Vibration test --- --- --- ● ● ●
  Low temperature working condition test --- --- --- ● ● ●
  Static pressure test --- --- --- ● ● ●
  Fan aerodynamic characteristics test --- --- --- ● ● ●
  Air conditioning unit and control panel supporting test --- --- --- ● ● ●
  Power frequency withstand voltage test --- --- --- --- ● ---
  Impact withstand voltage test --- --- --- --- ● ---
  Electric surface temperature test --- --- --- --- ● ---
  Ultra low cooling test --- --- --- --- ● ---
  Gas seal test --- --- --- --- --- ●
 

Composition And Principle Diagram

The general vehicle air conditionsystem includes five parts: ventilation system, air cooling system, air heating system, air humidification system and automatic control system.

 


Reference Solution

Unit type DLD40
Cooling capacity ≥40kW
Heating capacity 4+4kW
Air supply ≥5000m3/h
Fresh air volume ≥1100m3/h
Emergency ventilation ≥2000m3/h
Electrical connection parameters Total input power ≈21.10 kW(Under nominal conditions)
Compressor ≈2×9.05kW，AC380V, 3PH-50Hz
Coolling fan ≈2×0.75kW，AC380V, 3PH-50Hz
Evaporating fan ≈2×0.75kW，AC380V, 3PH-50Hz
The refrigerant R407C
Dimension 4000（L）×1600（W）×365（H）(Dimensions not including mount dimensions)
Weigth ≈800kg
 

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