Specifications

Characteristics
Newly developed
refrigeration circuit
(Main refrigeration circuit)
The electronic expansion valve located on
the cooling side, has an extended water
flow control rate (0 to 100%), while the
Smart Refrigerator & Dehumidifier System
controls the refrigeration capacity to its
minimum. Consequently, while creating
a highly accurate temperature and humidity
environment, the refrigeration circuit
suppresses heater output and reduces
power consumption of both refrigerator
and heater.
A sub refrigeration circuit for
further energy savings
PL−2/3/4, PU−2/3/4, PSL, PG, PDL, PCR
On chambers equipped with the 400 W
refrigerator, the Smart Refrigerator &
Dehumidifier System controls the operation
when stable at constant ranges above 50°C
/40%rh, after the chamber activated the
sub refrigerator to run at minimum
capacity. Chambers using this double
energy saving control can run with the
best energy-saving rates.
For example, the PL−3J power consumption
can be cut by 70% max. under 85°C /85%rh
conditions. (Compared to previous
model)
Optimized for energy savings
in low temperature ranges
–––DC inverter (option)
PL-2/3/4, PU-2/3/4
If the chamber is often used in low
temperature ranges, you can select the DC
inverter control refrigeration system with
excellent energy saving characteristics in
low temperature ranges.
High temperature & humidity
chamber PHP provides
energy savings under high
heat loads
The PHP chamber features a built-in heat
pipe. This ensures low energy consumption
even in tests involving high heat loads.
(For details, refer to page 14.)
Energy savings
Power consumption comparison
(example)
Power consumption comparison when equipped
with the DC inverter energy saving system
Operating conditions
• Temperature control
• Temperature & humidity control
+60°C
PL-3
PR-3
PU-3
PL-3
PR-3
PU-3
+20°C
Operating conditions
Power consumption (kWh)
Power consumption (kWh)
1.000.50
1.50
2.00 2.50
Operating conditions
0°C
–10°C
–20°C
Power consumption (kWh)
1.000.50
1.50
2.00 2.50
1.000.50
1.50
2.00 2.50
PL-3
PR-3
PL-3
PU-3
+85°C/
85%rh
PL-3
PR-3
+20°C/
40%rh
J Series
K Series
J Series
K Series
Energy
savings rate
66% max.
Energy
savings rate
70% max.
Energy
savings rate
48% max
●
New refrigeration circuit
Accumu-
lator
Compressor
1.5 kW
(Type 4:
3 kW)
Heat
exchanger
Electronic
expansion valve
Solenoid
valve
Test
area
Compressor
400W
Heat
exchanger
Solenoid
valve
Main refrigeration circuit
CoolerCooler
CondenserCondenser
Intermediate
injection circuit
Bypass
circuit
Bypass
circuit
Expansion
mechanism
Expansion
mechanism
Sub refrigeration circuit
9