19
Bef
ore
Operation
Handling
Liquid temperature
thermistor
(To “*1” point)
Room temperature
thermistor (To “
∗
4” point)
Machine temperature tuning
thermistor (optional)
(To “
∗
5” point)
Control board
∗
4
B
Pressure reducing
mechanism
Room temperature (Th3)
Liquid
temperature
(Th4)
Machine
temperature
(Th5)
Fan
M
Compressor
(Refrigerant only)
(Refrigerant)
∗
5
(Refrigerant)
Condenser
C
A
M
M
M
∗
1
Cutting swarf
disposal unit
Filter
Coolant liquid
Coolant liquid
(Clean chamber)
(Dirty chamber)
Coolant tank (1)
(with cutting swarf/coolant liquid separating equipment)
Coolant tank (2)
Ev
apor
ator
(Cooler)
Tool
Workpiece
M
Agitator
motor
Coolant liquid
Intak
e air
Exhaust air
Coolant
pump
Coolant
pump
Coolant
pump
D
Main machine (Machine tool)
Operation Setting
The Oil Cooling Unit operation setting provides the following modes.
Holding constant tank liquid
temperature
(Keeping a control target at a
constant temperature)
Fixed temperature
control
Tank liquid
temperature
0 (p. 20)
5.0–50.0 (˚C)
Tuning tank liquid temperature to
room temperature (or machine
temperature)
(Keeping a constant temperature
difference between the control target
and the reference temperature)
Cooling liquid in the tank at
constant capacity (%)
(Cooling operation is executed according
to the capacity command, but tank liquid
temperature control is disabled.)
Capacity direct
designation
(used for trial
run etc.)
None
9 (p. 22)
0–100 (%)
None
Tuning temperature
control
–
9.9–9.9 (K)
3 (p. 21)
4 (p. 21)
–
9.9–9.9 (K)
Tank liquid
temperature
Tank liquid
temperature
An example of a main machine coolant system using the Oil Cooling Unit is shown below.
System outline drawing
Description on the refrigerating cycle
∗
4
∗
1: For control target measuring points, see the figure below.
∗
2: Optional function using optional parts
∗
3: Operation modes 1, 2 and 5–8 cannot be used.
∗
4: K (Kelvin) is a symbol of the SI unit system that indicates a temperature difference (˚C).
(AKZJ type OILCON)
Control method
Setting range
Operation mode
∗
3
(Reference page)
Reference
temperature
Control target
∗
1
Room
temperature
Machine
temperature
∗
2
A: The compressor produces high-temperature, high-pressure compressed gas so that the refrigerant gas can be easily cooled and liquefied in the condenser.
B: The condenser cools and condenses the high-temperature, high-pressure gas produced in the compressor, to transform it to high-temperature, high-pressure liquid.
C: The pressure reducing mechanism throttles the high-temperature, high-pressure liquid to reduce pressure, and transform it to low-temperature,
low-pressure liquid/gas mixture so that it can be easily evaporated in the evaporator.
D: The evaporator evaporates the low-temperature, low-pressure liquid/gas mixture produced in the pressure reducing mechanism by absorbing
heat from the oil (by cooling the oil), and transforms it to low-temperature, low-pressure gas.
Note)1. The system components other than the AKZJ series Oil Cooling Unit
should be provided by user (main machine).
PIM00132A_EN.fm 19 ページ ２００７年９月２０日 木曜日 午後３時４分
