Upload
maria-ramsey
View
220
Download
3
Tags:
Embed Size (px)
Citation preview
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
1
HVAC UNIT : LOCALISATION IN VEHICULE
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
2
Evaporator
Blower
Demisting / defrosting flap
Vent flat
Heater core
Mixing flap
Air inlet flap
Filter
Feet heating flap
Recirculationair intake
Air intake grille
HVAC unit
HVAC : Heating, Ventilating & Air Conditioning Unit
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
3
OBJECTIVES
SAFETY
THERMALCOMFORT
VISIBILITY
WINTERSUMMER
* WINDSCREEN* LEFT & RIGHT SIDE
* HEATING* COOLING
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
4
Vehicle integration
VEHICLE INTEGRATION
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
5
AIR CIRCULATION
EXHAUST DUCTS
VEHICLE AIR INLET
WATER SEPERATOR
HVAC UNIT
COCKPIT / AIR DUCTS
PASSENGER COMPARTMENT
AIR CIRCULATION
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
6
BLOWER SUBASSEMBLY
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
7
BLOWER
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
8
THERMAL SUBASSEMBLY
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
9
THERMAL SUBASSEMBLY: TEMPERATURE CONTROLWITH WATER FLOW CONTROL
HEATER COREM
EVAPORATOR
WATER VALVE
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
10
THERMAL SUBASSEMBLY: COMPARISON OF DIFFERENT TYPES OF TEMPERATURE CONTROL
Air Mixing control Water flow control
+ - + -
Cost High volume Low volume Cost
Natural bilevel Aerothermic set-up
Left & right température
control
Influence of engine speed
Fast answer Heater core wear No over-heating Temperature linearity
Good stability Design of heater core
Pressure drop on air circulation
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
11
THERMAL SUBASSEMBLY: EVAPORATOR
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
12
THERMAL SUBASSEMBLY: ELIMINATION OF CONDENSATES
Wall to trap dropletts
Position 9 to 15° in the vehicle
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
13
THERMAL SUBASSEMBLY: HEATER CORE
Mechanical assembly technology
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
14
THERMAL SUBASSEMBLY: HEATER CORE
Brazed aluminium technology
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
15
AIR DISTRIBUTION: FEET / HEATING MODE
The distribution control is on the “Feet” position; the demisting nozzle is usually permanently
supplied (by design leak: 10% of the flow rate). The position of the blower control and the heating control are adjusted according to requirements (the colder the external temperature, the larger the flow rate).The air intake control is on outside air.The A/C control is switched on (the compressor starts up as soon as the temperature so permits).
A/C
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
16
CENTRED HVAC UNIT
2 SUBASSEMBLIESEXAMPLE
Opel Vectra
DISTRIBUTIONBLOCK
THERMALBLOCK
BLOWERBLOCK
AIR INLETBLOCK
X
Y
1/2
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
17
CENTRED HVAC UNIT
ADVANTAGES DISADVANTAGES
Same unit for left and right hand drive
Volume in x or z axis (--)
Cost
Compacity in y axis (glove box)(++)
Left and right separate temperature control (++)
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
18
CENTRED HVAC UNIT WITH LATERAL BLOWER
BLOWERBLOCK
AIR INLETBLOCK
Y
DISTRIBUTIONBLOCK
THERMALBLOCK
X
Evaporator
1 2
3/4
4 SUBASSEMBLIESEXAMPLES
Peugeot 406Peugeot 605
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
19
CENTRED HVAC UNIT WITH LATERAL BLOWER
ADVANTAGES DISADVANTAGES
Left and right separate temperature control (+)
Volume in x or z axis (-)
Compacity in y axis (+) Cost (--)
Different units for left and right hand drive
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
20
HALF CENTRED HVAC UNIT
AIR INLETAND BLOWER
BLOCK
Y
DISTRIBUTIONBLOCK
HOTBLOCK
X
Heater core
1 2
3/4
4 SUBASSEMBLIESEXAMPLES
Renault SafraneRenault Laguna
COLDBLOCK
Evap
orat
or
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
21
HALF CENTRED HVAC UNIT
ADVANTAGES DISADVANTAGES
Left and right separate temperature control (+)
Cost (--)
Compacity in x axis (+) Volume in y axis (-)
Different units for left and right hand drive
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
22
NON CENTRED HVAC UNIT
AIR INLETAND BLOWER
BLOCK
Y
DISTRIBUTIONBLOCK
X
1/2
2 SUBASSEMBLIESEXAMPLES
Citroën ZXCitroën XantiaVW
COLDBLOCK
HOTBLOCK E
vapo
rato
r
Heater core
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
23
NON CENTRED HVAC UNIT
ADVANTAGES DISADVANTAGES
CostLeft and right separate temperature control (--)
Compacity in x axis (++) Volume in y axis (--)
Different units for left and right hand drive
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
24
It is near the air inlet, in the engine compartment, or between the blower and the evaporator in the cockpit
THE CAR CABINE FILTER
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
25
ENDURANCE On VEHICULE
PARTICLES FILTERS CHARACTERISATION
Big town Semi-urban Motor-way
Pre
ssu
re d
rop
by
fou
ling
(P
asca
ls)
Kilometers (Km)
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
26
The filter should be controled systematically during maintenance operations
FILTER FOR CAR CABINE
Old FilterNew filter
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
27
PARTICLES FILTER
Filtering level: X% of 0,5 m particlesLife time: 30000 km (class B - 4dm², thickness 20 mm)
Pitch: 2,5mm
Frame(Polypropylene)
LutingCorrugated
Media
Seal (foam)
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
28
AIR INLET SUBASSEMBLY: PARTICLE FILTERS
BEFORE BLOWER AFTER BLOWER
Peugeot 605 Citroën Xantia
Renault Safrane BMW 5 series
Volvo 850
Version 15/3/2000 CCD2 - HVAC ARCHITECTURE
29
COMBINED GAS AND PARTICLES FILTERS