Daikin Oil Cooling Unit AKJ Series (Immersion Type for Cooling Coolant)
This document provides comprehensive information on the Daikin AKJ series of immersion-type oil cooling units, designed for cooling coolant in industrial applications. For the latest information, please visit daikinpmc.com/en/.
Features
- Immersion Type: Designed for direct mounting on the tank, without a separate circulating pump.
- High Energy-Saving Performance: Achieved through the adoption of a Daikin original IPM motor and R410A refrigerant with high COP characteristics.
- Compact Design: Top-class industry downsizing, ensuring compatibility with conventional products.
- Enhanced Support for Shallow Tanks: Features a reduced cooling coil depth, providing cooling capacity equivalent to conventional products.
- Extended Cooling Capacity Control Range: Maintains coolant temperature within ±0.1°C across the entire cooling load range (0-100%), enhancing machine tool accuracy.
Nomenclature
The model nomenclature follows the pattern: AKJ [Cooling Capacity] - [Option Type]
| Part | Description | Details |
|---|---|---|
| 1 | Oil cooling unit identification code | AKJ: High-accuracy inverter controlled oil cooling unit, Immersion type for cutting/grinding fluid (oil) |
| 2 | Cooling capacity (kW) | 18: 1.8 kW, 35: 3.5 kW, 45: 4.5 kW, 56: 5.6 kW, 90: 9.0 kW |
| 3 | Symbol of series | 9: "9" series |
| 4 | Symbol of option type | Special specifications like -*** (3-digit number) or C*** (3-digit number). Consult Daikin for detailed information. |
Applications
These units are ideal for various industrial applications, including:
- Machine Tools: Machining centers, NC lathes, grinding machines, NC specialized machines, NC electric discharge machines.
- Industrial Machines: Molding machines, presses.
Cooling of Hydraulic Oil:
- Temperature (viscosity) control for prevention of hydraulic oil deterioration and stabilized actuator operation.
Cooling of Cutting Oil:
- Cooling of workpiece and tool to improve machining accuracy and extend tool life.
Diagram Description: A schematic illustrates the application of the oil cooling unit with a machining center. It shows the unit connected to a coolant tank, which supplies fluid to the workpiece and tool via a hydraulic unit.
Specifications
Detailed specifications for the AKJ series models are provided below.
AKJ189/359/459 Specifications
| Specification | Unit | AKJ189 | AKJ359 | AKJ459 |
|---|---|---|---|---|
| Oil cooling unit horsepower | HP | 0.5 | 1.2 | 1.5 |
| Model Name | - | Standard, -B, -C, -H, -046, -047, -048 | Standard, -B, -C, -H, -046, -047, -048 | Standard, -B, -C, -H, -046, -047, -048 |
| Cooling capacity (50/60 Hz) | kW | 1.6/1.8 | 3.2/3.5 | 4.2/4.5 |
| Heater | kW | 1 | 1 | 1 |
| Power supply | - | Three-phase AC 200/200-220 V 50/60 Hz *3 | ||
| Main circuit Power voltage | - | 200 V 50 Hz / 200 V 60 Hz / 220 V 60 Hz | ||
| Operation circuit | - | DC 12/24 V | ||
| Max. power consumption (Cooling) | kW | 0.82 / 0.83 / 0.83 | 1.37 / 1.38 / 1.39 | 1.46 / 1.48 / 1.48 |
| Max. current consumption (Cooling) | A | 3.3 / 3.2 / 3.0 | 5.2 / 5.1 / 4.8 | 5.6 / 5.4 / 5.1 |
| Max. power consumption (Heating) | kW | 1.20 / 1.20 / 1.44 | 1.20 / 1.20 / 1.44 | 1.20 / 1.20 / 1.44 |
| Max. current consumption (Heating) | A | 3.8 / 3.8 / 4.2 | 3.8 / 3.8 / 4.2 | 3.8 / 3.8 / 4.2 |
| Transformer capacity | kVA | 2.14 | 2.14 | 2.14 |
| External paint color | - | Ivory white | ||
| External dimensions (H x W x D) | mm | 920 x 360 x 440 | 1,045 x 360 x 440 | 1,200 x 360 x 440 |
| Compressor (Hermetic DC swing type) | - | Equivalent to 0.4 kW | Equivalent to 0.75 kW | Equivalent to 1.1 kW |
| Evaporator | - | Open coil type | ||
| Condenser | - | Cross-fin-coil type | ||
| Propeller fan Motor | W | 54 | - | - |
| Agitator Motor | - | 3-phase, 60 W, 4-pole motor | ||
| Temperature control (Selectable) | Synchronization type | Room temperature or machine temperature (Set to room temperature by default) | ||
| Synchronization range | °C | -9.9 to +9.9 against the reference temperature (Set at 0.0 by default) | ||
| Controlled object | Tank fluid temperature | 5 to 50 °C | ||
| Oil temperature controller resolution | °C | ±0.1°C | ||
| Capacity control range | % | 0 to 100% | ||
| Timer function | - | ON timer: 1 to 999 hours (1-hour unit setting) | ||
| Refrigerant control | - | Rotation speed control of compressor by inverter + Opening rate control of electric expansion valve | ||
| Refrigerant (R410A) Filling volume | kg | 0.55 | 0.76 | 0.99 |
| Protection devices/protective functions | - | Includes thermistors, reverse-phase protection, restart prevention timer, temperature protection, refrigerant leakage detector, inverter protection, circuit breaker (-B type only), high-pressure switch (-C type only), compressor thermal protector (-C type only), overheat prevention thermistor (-H type only), fuse (-H type only). | ||
| Operation range (Room temperature) | °C | 5 to 45 | ||
| Operation range (Tank fluid temperature) | °C | 5 to 50 | ||
| Oil viscosity | mm²/s | 0.5 to 200 | ||
| Acceptable oils | - | Water-soluble cutting/grinding fluid, cutting/grinding oil, lubrication oil, hydraulic oil, industrial water (Not for chemicals, food products, or fuel) | ||
| Noise level (Front 1 m, height 1 m) | dB (A) | 62 | - | - |
| Permissible transport vibration | - | Up and down vibration 14.7 m/S² (1.5G) x 2.5 hr (7.5 to 100 Hz sweep/5 min.) | ||
| Ingress protection | - | IP2X | ||
| Mass | kg | 38 | 40 | 44 |
| Molded-case circuit breaker (Rated current) | A | 10 | 10 | 10 |
| Items prepared by customer (Molded-case circuit breaker) | A | - | - | - |
| Items prepared by customer (Device other than molded-case circuit breaker) | - | Tank, supply pump, float switch, return filter | ||
AKJ569/909 Specifications
| Specification | Unit | AKJ569 | AKJ909 |
|---|---|---|---|
| Oil cooling unit horsepower | HP | 2.0 | 3.0 |
| Model Name | - | Standard, -B, -C, -H, -046, -047, -048 | Standard, -B, -C, -H, -046, -047, -048 |
| Cooling capacity (50/60 Hz) | kW | 5.0/5.6 | 8.0/9.0 |
| Heater | kW | 2 | 4 |
| Power supply | - | Three-phase AC 200/200-220 V 50/60 Hz *3 | |
| Main circuit Power voltage | - | 200 V 50 Hz / 200 V 60 Hz / 220 V 60 Hz | |
| Operation circuit | - | DC 12/24 V | |
| Max. power consumption (Cooling) | kW | 2.12 / 2.15 / 2.15 | 2.32 / 2.33 / 2.79 |
| Max. current consumption (Cooling) | A | 7.3 / 7.0 / 6.6 | 7.1 / 7.1 / 7.8 |
| Max. power consumption (Heating) | kW | 1.46 / 1.48 / 1.48 | 1.48 / 1.48 / 1.44 |
| Max. current consumption (Heating) | A | 5.6 / 5.4 / 5.1 | 5.6 / 5.4 / 5.1 |
| Transformer capacity | kVA | 2.79 | 5.02 |
| External paint color | - | Ivory white | |
| External dimensions (H x W x D) | mm | 1,450 x 470 x 500 | 1,630 x 560 x 620 |
| Compressor (Hermetic DC swing type) | - | Equivalent to 1.5 kW | Equivalent to 2.2 kW |
| Evaporator | - | Open coil type | |
| Condenser | - | Cross-fin-coil type | |
| Propeller fan Motor | W | 100 | - |
| Agitator Motor | - | 3-phase, 60 W, 4-pole motor | |
| Temperature control (Selectable) | Synchronization type | Room temperature or machine temperature (Set to room temperature by default) | |
| Synchronization range | °C | -9.9 to +9.9 against the reference temperature (Set at 0.0 by default) | |
| Controlled object | Tank fluid temperature | 5 to 50 °C | |
| Oil temperature controller resolution | °C | ±0.1°C | |
| Capacity control range | % | 0 to 100% | |
| Timer function | - | ON timer: 1 to 999 hours (1-hour unit setting) | |
| Refrigerant control | - | Rotation speed control of compressor by inverter + Opening rate control of electric expansion valve | |
| Refrigerant (R410A) Filling volume | kg | 1.07 | 1.58 |
| Protection devices/protective functions | - | Includes thermistors, reverse-phase protection, restart prevention timer, temperature protection, refrigerant leakage detector, inverter protection, circuit breaker (-B type only), high-pressure switch (-C type only), compressor thermal protector (-C type only), overheat prevention thermistor (-H type only), fuse (-H type only). | |
| Operation range (Room temperature) | °C | 5 to 45 | |
| Operation range (Tank fluid temperature) | °C | 5 to 50 | |
| Oil viscosity | mm²/s | 0.5 to 200 | |
| Acceptable oils | - | Water-soluble cutting/grinding fluid, cutting/grinding oil, lubrication oil, hydraulic oil, industrial water (Not for chemicals, food products, or fuel) | |
| Noise level (Front 1 m, height 1 m) | dB (A) | 65 | 68 |
| Permissible transport vibration | - | Up and down vibration 14.7 m/S² (1.5G) x 2.5 hr (10 to 100 Hz sweep/5 min.) | |
| Ingress protection | - | IP2X | |
| Mass | kg | 72 | 75 |
| Molded-case circuit breaker (Rated current) | A | 15 | 20 |
| Items prepared by customer (Molded-case circuit breaker) | A | 15 (Required for types other than -B type) *7 | 20 (Required for types other than -B type) *7 |
| Items prepared by customer (Device other than molded-case circuit breaker) | - | Tank, supply pump, float switch, return filter | |
Notes on Specifications:
- *1: Cooling capacity is at the standard point (tank fluid temp: 35°C, room temp: 35°C, fluid: ISO VG32), with ±5% product tolerance.
- *2: Use a commercial power supply. Inverter power supplies may cause damage. Voltage fluctuation should be within ±10%.
- *3: Different voltage types: -046 (220/230V, no transformer), -047 (380/400/415V, with transformer), -048 (440/460/480V, with transformer).
- *4: Machine temperature synchronization requires an optional thermistor.
- *5: MSDS for R410A is attached to the -C type.
- *6: Electric component box ingress protection: IP54 or equivalent.
- *7: Molded-case circuit breaker is not supplied; customer must prepare.
- *8: Maximum power/current consumption for different voltage specifications are detailed in the tables on page L-21.
External Dimension Diagrams
The following diagrams illustrate the external dimensions and component layouts for each model series. Installation hole positions are compatible with the AKZJ8 series, but power/signal cable inlet ports differ.
AKJ189 Dimensions
Diagram Description: Shows front, side, and rear views of the AKJ189 unit with dimensions labeled. Key components like the control panel, air filter, cooling coil, and power cable inlet are indicated by numbered parts. Overall dimensions are approximately 920mm (H) x 360mm (W) x 440mm (D).
AKJ359 Dimensions
Diagram Description: Shows front, side, and rear views of the AKJ359 unit with dimensions labeled. Key components like the control panel, air filter, cooling coil, and power cable inlet are indicated by numbered parts. Overall dimensions are approximately 1,045mm (H) x 360mm (W) x 440mm (D).
AKJ459 Dimensions
Diagram Description: Shows front, side, and rear views of the AKJ459 unit with dimensions labeled. Key components like the control panel, air filter, cooling coil, and power cable inlet are indicated by numbered parts. Overall dimensions are approximately 1,200mm (H) x 360mm (W) x 440mm (D).
AKJ569 Dimensions
Diagram Description: Shows front, side, and rear views of the AKJ569 unit with dimensions labeled. Key components like the control panel, air filter, cooling coil, and power cable inlet are indicated by numbered parts. Overall dimensions are approximately 1,450mm (H) x 470mm (W) x 500mm (D).
AKJ909 Dimensions
Diagram Description: Shows front, side, and rear views of the AKJ909 unit with dimensions labeled. Key components like the control panel, air filter, cooling coil, and power cable inlet are indicated by numbered parts. Overall dimensions are approximately 1,630mm (H) x 560mm (W) x 620mm (D).
Cooling Capacity Characteristic Charts
These charts illustrate the cooling capacity of each model under various operating conditions:
- X-axis: Room temperature (°C)
- Y-axis: Cooling capacity (W)
- Lines: Represent different tank fluid temperatures relative to room temperature (e.g., Tank fluid temperature = Room temperature + 10°C, Tank fluid temperature = Room temperature, Tank fluid temperature = Room temperature - 10°C) and operation at 50 Hz vs. 60 Hz.
AKJ189: Shows cooling capacity ranging from approximately 500W to 2500W.
AKJ359: Shows cooling capacity ranging from approximately 500W to 4500W.
AKJ459: Shows cooling capacity ranging from approximately 1000W to 6000W.
AKJ569: Shows cooling capacity ranging from approximately 2000W to 7000W.
AKJ909: Shows cooling capacity ranging from approximately 2000W to 10000W.
Operation Range: A separate chart shows the permissible operating range, with Room temperature on the X-axis and Tank fluid temperature on the Y-axis. The standard point (marked with 'O') is at 35°C for both room and fluid temperature.
Note: It is crucial to use the unit within the specified operating range to prevent unit failure.
