¡
The compressor compresses the refrigerant gas and discharges high-temperature, high-
pressure refrigerant gas.
¡
In the case of air-cooled refrigeration, the high-temperature, high-pressure refrigerant gas is
cooled down by fan ventilation in the air-cooled condenser, where it is then liquefied.
¡
The liquefied high-pressure refrigerant gas expands and its temperature lowers when it
passes through expansion valve A, where it vaporizes after receiving heat from the circulating
fluid in the evaporator.
¡
The vaporized refrigerant gas is sucked into the compressor and compressed again.
¡
When heating the circulating fluid, the high-pressure, high-temperature refrigerant gas is
bypassed into the evaporator by expansion valves B and C to heat the circulating fluid.
¡
In the case of water-cooled refrigeration, the refrigerant gas is cooled by the facility water in
the facility water circuit in the water-cooled condenser, where it is then liquefied.
For water-cooled refrigeration
¡
The water-regulating valve opens
and closes to keep the refrigerant
gas pressure consistent. The
facility water flow rate is controlled
by the water-regulating valve.
¡
After the circulating fluid discharged from the pump is heated or cooled by the customer
system side, it returns to the tank.
¡
The circulating fluid is sent to the heat exchanger by the pump, and is controlled to a set
temperature by the refrigeration circuit, to be discharged to the customer system side
again by the thermo-chiller.
Refrigeration circuit
Facility water circuit
Circulating fluid circuit
The combination of the precise control
of expansion valves A, B, and C
realizes energy saving operation
without waste and high temperature
stability.
Adjusting the
discharge
pressure by pump
inverter control
eliminates wasteful discharge
of the circulating fluid and
realizes energy saving
operation.
Since the refrigeration circuit is
controlled by the signals from 2
temperature sensors (for return and
discharge), precise temperature control
of the circulating fluid can be achieved. Therefore,
there is no need for a tank with a large capacity
to absorb the circulating fluid temperature
difference, as high temperature stability can be
achieved even with a small-size tank. This also
contributes to space saving.
One compressor controls
2 channels which realize
the independent
temperature control of 2
systems.
Temperature
sensor
Temperature
sensor
Temperature
sensor
Expansion
valve C
Expansion
valve B
Expansion
valve A
Pump
Compressor
CH2
CH1
Temperature of
CH1: Oscillator
and
CH2: Optical system
is
controlled individually.
One compressor controls 2 channels.
POINT
POINT
POINT
By controlling the inverter fan and electronic
expansion valve simultaneously, it maintains the
good temperature stability when the heat load
fluctuates.
¡
Outdoor air temperature: 32
°
C
¡
Circulating fluid set temperature: 20
°
C/25
°
C (CH1/CH2)
¡
Heat load in the customer equipment: 9.5 kW (CH1, 2 total)
¡
Power supply: 200 V 60 Hz
¡
Circulating fluid flow rate: 35 LPM/2 LPM (CH1/CH2) 60 Hz
¡
External piping: Bypass Heat load
∗
For HRLE090-A-20
Temperature stability:
±
0.1
°
C (CH1)
When a load is stable
Pressure
sensor
Pressure
sensor
Pressure
sensor
Pressure
sensor
Facility
water
outlet
Facility
water
inlet
Circulating
fluid outlet
Circulating fluid
outlet
Circulating fluid circuit
Refrigeration circuit
Facility water circuit
Water-cooled
condenser
Air-cooled
condenser
Refrigerant
filter
Fan
Heat exchanger
Air release valve
for facility water
discharge
Water-
regulating
valve
WPR
Heat
exchanger
Level
switch
Drain
port
Circulating fluid
return port
Circulating fluid
return port
Temperature
sensor
Temperature
sensor
Temperature
sensor
Circulating fluid temper
ature [
°
C]
Circulating fluid temper
ature [
°
C]
Heat load fluctuation
When a load is stable
±
0.1
°
C
When a load is stable
±
0.5
°
C
8.5 kW load
0 kW load
17
18
19
20
21
22
0
10
20
30
40
1 kW load
0 kW load
22
23
24
25
26
27
0
10
20
30
40
Time [Minute]
CH1
CH2
∗
When the inverter option is equipped
Tank
Air-cooled refrigeration
Water-cooled refrigeration
Conditions
POINT
2
Circulating Fluid Temperature Controller
Thermo-chiller
Compact Dual/Basic Type for Lasers
Air-cooled Refrigeration
Water-cooled Refrigeration
HRLE
Series
