SUNWARD SWDM40 - Air-Conditioning System

SWDM40 OPERATION & MAINTENANCE MANUAL
35
reduce PM (particle). Meanwhile, it can release heat through oxidation, used as heat
management.
DPF is the diesel particle filter. It collects particle material with the special filter element
to reduce that in the exhaust gas. When the deposit volume of PM (particle) is piled up, the
exhaust temperature is increased forcibly to burn the accumulated PM (particle).
See the use and maintenance of engine system in the chapter of Operation and
Maintenance.
2.3.5 Air-Conditioning System
Electric heating and cooling air conditioning is adopted to improve the indoor comfort of the
cab.
The main technical parameters of the air-conditioning
：
1
）
System refrigerating capacity
：
5.5 KW±10%
2
）
System heating capacity
：
5.81KW±10%
3）System air output: 550 m³/h; warming air supply:400 m³/h
4
）
Freezing medium
：
R-134a
5
）
Compressor exhaust volume
：
147 cm³/r
6
）
System service voltage
：
24V.DC
7
）
Mechanical consumption: <3 KW
8) Working environment
：
-25
℃～
65
℃（
Temperature
）
20
％～
90
％ （
Relative humidity
）
1. Operating principle of air conditioning:
The compressor compresses the gaseous refrigerant into the refrigerant gas of high temperature
and high pressure, then the refrigerant gas is discharged into the condenser from the compressor
nozzle, and cools down to become the liquid, then flow to the reservoir. High temperature and
high pressure of the refrigerant liquid is flowed into the evaporator after dry filter within the
reservoir, after expansion valve throttling depressurization, become the low temperature and
low pressure gas-liquid mixture, and then be inhaled from the low pressure intake pipe, it is a
constant cycle. Evaporator continuously absorbs heat to send cold air to the cab, attaining the
effect of refrigeration. (as FIG. 2-9)
Heating: Hot water in engine is guided into the evaporator element, on which the cold air is sent
by fan continuously, and then change with hot water, making cold air into hot one. And the hot
air is blown into cab through air pipe of the air conditioner. Above circulation is repeated
continuously, so as to heat. (as FIG. 2-10)