Post on 28-Mar-2015
Toyota Motor Europe
Prius PHV
Air Conditioning
TodayTomorrowToyota
Overview
Items PRIUS Plug-in PRIUS
Heater Control Panel
Automatic A/C
A/C UnitSome of air is always re-circulated
Plasmacluster Generator (-A Only) —
Heater
SFA (Straight Flow Aluminum) -II Heater Core
PTC Heater165 W x 3 —
280 W x 3 —
Heat Pump System —
Electric Water Pump (for Heater and Engine Cooling)
Compressor
Scroll Type Compressor with Motor (A/C Inverter integrated)
ES14 —
ES27 —
Compressor Oil: ND-OIL11
: Available —: Not Available
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Overview
ItemsPRIUS Plug-
inPRIUS
Condenser MF-IV Sub-cool Condenserin Engine Compartment
in A/C Unit —
Evaporator ECS (Ejector Cycle System) Evaporator
Servo Motor Pulse Detection Type Servo Motor with Bus Connector
Blower Brushless Motor
Models with Solar Power Ventilation System
—
for All Models —
Clean Air Filter Pollen Removal Type
Sensor Humidity Sensor —
Refrigerant HFC134a
Control
Solar Ventilation System Control —
Remote Air Conditioning System Control
Cooling Operation
Heating Operation —
Eco Mode Control
: Available —: Not Available
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Heat Pump System
Plug-in Hybrid with Heat
Pump System
Plug-in Hybrid without Heat Pump System
Start GoalHeater ON
EV Driving
Engine is warmed-up only for the heating operation(It lowers fuel economy)
Engine is warmed-up only for the heating operation(It lowers fuel economy)
The heat pump system (electric energy) is used when the engine is cold
The heat pump system (electric energy) is used when the engine is cold
EV Driving
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Heat Pump SystemSystem Diagram
Engine
Compressor with Motor
Electric Water Pump A/C Unit
Heater Core
ECS Evaporator
Condenser
Condenser
Expansion Valve
High Pressure Magnetic Valve
Dehumidification Magnetic Valve
Heating 3-way Valve
Low Pressure Magnetic Valve
Heat Exchanger Shut Valve
Refrigerant Outlet Temp. Sensor
Refrigerant Inlet Temp. Sensor
Accumulator
Orifice
Air Mix Damper
E
C
C
H
A/C Pressure Sensor
M
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Heat Pump SystemParts location
A/C Unit (RHD Model)
Heater Core
ECS Evaporator
Condenser
PTC Heater
Blower Motor
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Heat Pump SystemParts location
Compressor with Motor
CondenserHigh Pressure Magnetic Valve
Dehumidification Magnetic Valve
Heating 3-way Valve
Low Pressure Magnetic ValveHeat
Exchanger Shut Valve
Refrigerant Outlet Temp. Sensor
Refrigerant Inlet Temp. Sensor
Accumulator
Expansion Valve
A/C Pressure SensorA/C Unit
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Heat Pump SystemRefrigerant line (All)
E: EvaporatorC: CondenserH: Heater CoreM: Compressor with Motor
Condenser
A/C Unit
View from A
AEC
CHM ECCHM
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Heat Pump SystemRefrigerant line (1/3)
Heating 3-way Valve
Refrigerant Outlet Temp. Sensor
A/C Pressure Sensor
Compressor with Motor
E: EvaporatorC: CondenserH: Heater CoreM: Compressor with Motor
ECCHM ECCHM
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Heat Pump SystemRefrigerant line (2/3)
High Pressure Magnetic Valve
Dehumidification Magnetic Valve
Heat Exchanger Shut Valve
Expansion Valve
E: EvaporatorC: CondenserH: Heater CoreM: Compressor with Motor
ECCHM ECCHM
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Heat Pump SystemRefrigerant line (3/3)
Low Pressure Magnetic Valve
Refrigerant Inlet Temp.
Sensor
Accumulator
E: EvaporatorC: CondenserH: Heater CoreM: Compressor with Motor
ECCHM ECCHM
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Heat Pump SystemCooler cycle
A/C Unit
Open
Open
Close
OFF
Close
Cooled AirE
C
C
HEngine
E: EvaporatorC: CondenserH: Heater CoreM: Compressor with Motor
M
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Heat Pump SystemHeat Pump Cycle
A/C Unit
Close
Close
ON
OpenOpen
Warmed Air
E
C
C
HEngine
E: EvaporatorC: CondenserH: Heater CoreM: Compressor with Motor
M
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Heat Pump SystemHeat Pump Cycle (With dehumidification) [A]
A/C Unit
Close
Close
Open
ON
Close
E
C
C
HEngine
E: EvaporatorC: CondenserH: Heater CoreM: Compressor with Motor
Warmed and Dehumidified
Air
M
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Heat Pump SystemHeat Pump Cycle (With dehumidification) [B]
A/C Unit
Close
Open
ON
OpenOpenWarmed and Dehumidified
Air
E
C
C
H
E: EvaporatorC: CondenserH: Heater CoreM: Compressor with Motor
EngineM
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Heat Pump SystemHeating operation by engine coolant
A/C Unit
Open
Open
Close
OFF
Close
E
C
C
HEngine
E: EvaporatorC: CondenserH: Heater CoreM: Compressor with Motor
Warmed Air
Electric Water Pump
M
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Heat Pump SystemHeat Pump Operating Conditions
Engine Coolant
Heat Pump
Heat Pump Cycle(with Dehumidification) [A]
Heat Pump Cycle(with Dehumidification) [B]
Heat Pump Cycle
with Dehumidification
Windshield glass is easy to fog up (with A/C switch
indicator ON)
•Windshield glass is hard to fog up
•A/C switch indicator is turned off by pressing A/C switch
2.5 °C (36.5 °F) or more
Less than 2.5 °C
(36.5 °F)
Evaporator temp.
•The heating performance by the current coolant temp. is higher than the target heating performance
•Front DEF switch is pressed (with windshield glass is easy to fog up)
•Temp. setting is MAX HOT•Ambient temp. is approx. –2 °C (28.4 °F) or less
•Frost is detected at the condenser (in the engine compartment)
The heating performance by the current coolant temp. is lower than
the target heating performance
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Heat Pump SystemAutomatic Defrosting Operation
A/C AmplifierRefrigerant Inlet Temp.
Sensor Signal
Start request
Approx. –15 °C (5 °F) or less continues for 30 sec. Approx. –15 °C (5 °F) or
less continues for 30 sec.
Judges that the condenser (in the engine
compartment) is frosted
Judges that the condenser (in the engine
compartment) is frosted
Engine
Warmed up
Heating operation is changed from heat pump
type to engine coolant type
Changes to cooler cycle in order to defrost the
condenser (for 20 min.)
Heating operation is changed from heat pump
type to engine coolant type
Changes to cooler cycle in order to defrost the
condenser (for 20 min.)
Cooler Cycle
Heat Pump Cycle
Required Flow Volume of the Electric Water
Pump
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Heat Pump SystemA/C switch indicator
A/C Switch Indicator
A/C System
Cooler Cycle Heat Pump Cycle
ON
Compressor ON Compressor ON
[with dehumidification][with dehumidification] (Automatically dehumidified
if necessary)
OFFCompressor OFF Compressor ON
[without dehumidification] [without dehumidification]
A/C Switch
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Heat Pump SystemHumidity Sensor
Humidity Sensor•Glass Humidity Sensor•Glass Temp. Sensor•Glass Surroundings Temp. Sensor
•Glass Humidity•Glass Temp.•Glass Surroundings Temp.
A/C Amplifier
Easiness of the windshield
glass fog up
•Energy loss reduced•Prevents windshield glass from fogging up
•Energy loss reduced•Prevents windshield glass from fogging up
Controls A/C system
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Heat Pump SystemHumidity sensor controls
Easiness of the windshield glass fog up
Air Inlet Mode Control
Air Outlet Mode Control
Airflow Volume Control
Increase REC Air
Increase FER Air
FRE 100%
FOOT/DFF Mode
Blower Level
+5
Keep REC/FRE ratio
+1
Normal Control
±0
Easy to fog upHard to fog up
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Remote Air Conditioning SystemActivation
Electric power supplied through the plug-in function
Press and Hold
Major Difference From PRIUS
Model PRIUS Plug-in PRIUS
Operation Cooling and Heating Cooling only
Operating Condition While plug-in charging While power mode OFF
Power Supply Supplied through the plug-in function HV Battery
Solar Ventilation System N.A. Equipped
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Remote Air Conditioning SystemSystem Diagram
Inverter Assembly
HV Battery (Sub 1, 2) Charger Relay
Remote Air Conditioning
Switch
Door Control Receiver
•Door Courtesy Light Switch•Door Lock Position Switch•Hood Courtesy Switch
V Bus V Bus No.1No.1
Power Power Management Management
BusBus
Certification ECU
•Power Switch•Shift Position Sensor•Stop Light Switch
HV Battery Assembly
Solar Sensor
Ambient Temp. Sensor
Room Temp. Sensor
Servo Motors
PTC Heater
Blower Motor
HV Battery (Main)
DC-DC Converter
IG1, IG2 Relays Compressor with Motor
A/C Amplifier
Main Body ECU
Power Management Control ECU
High-voltage High-voltage Wire HarnessWire HarnessBoost Converter (Sub)
Boost Converter (Main)
Battery Charger
Battery Charger Inlet
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Remote Air Conditioning SystemOperating Conditions
Operation Start Condition
Press and hold the remote air conditioning switch for 0.8 sec or more when all the following conditions are satisfied
Power mode is OFFPower switch is not pressedShift position is in PAll the doors are closed and lockedEngine hood is closedBrake pedal is not depressedTheft deterrent system is not in alarm stateWhile plug-in chargingCooling or heating operating conditions meet the set temperature
Operation Stop Condition [OR]
• When the operation start condition are not met• Approx. 30 min. have elapsed• When the remote air conditioning switch is pressed twice within 3 sec.
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Remote Air Conditioning SystemOperation
Heating Operation
Heat Pump(Heating Cycle)
Cooling Operation
Less than -2 °C (28.4 °F)
A/C system operates in accordance with the set temp.
Operation start conditions are satisfied
-2 °C (28.4 °F) or more
PTCHeater
Ambient Temp.
Maximally 3 PTC heaters (280 W x 3) are operated in accordance with the max. permissible power
TodayTomorrowToyota
Air Conditioning SystemRefrigerant
Standard Refrigerant Amount
Refrigerant Amount
Point where bubbles disappear
OverchargedHigh
Pressure
100 g(3.53 oz.)
+/- 50 g(+/- 1.76 oz.)
PRIUS Plug-in: 670 g (23.6 oz.)
PRIUS: 470 g (16.6 oz.)