Reverse Cycle Refrigeration & AC Training Unit | PolarX – 536
The Reverse Cycle Refrigeration & AC Training Unit PolarX – 536 runs two evaporators on a single compressor using an evaporator pressure regulator, demonstrating both refrigeration and air conditioning principles. This Reverse Cycle Refrigeration & AC Training Unit features an air-cooled condenser, water-cooled condenser with automated pressure regulator, and multiple flow control options including thermostatic expansion valves and capillary tube. A solenoid reversing valve enables dual-temperature operation, monitored by 7 Type-k temperature sensors and pressure gauges rated -1~25bar (delivery) and -1~16bar (suction). Optional LABVIEW-based DAQ software supports automated data measurement.
The Reverse Cycle Refrigeration & AC Training Unit PolarX – 536 operates two evaporators on a single compressor using an evaporator pressure regulator. This Reverse Cycle Refrigeration & AC Training Unit demonstrates both refrigeration and air conditioning concepts in a single apparatus.
Product Overview The condensing unit of this Reverse Cycle Refrigeration & AC Training Unit has an air-cooled condenser, a liquid receiver, and a high starting torque motor with an integrated winding protector. A water-cooled condenser features an automated condenser pressure regulator. Both the static and forced air evaporators contain a copper tube coil block with fins.
Hand valves are used to select the Flow Controls. This group includes the automatic expansion valve, the internal and external equalized thermostatic expansion valves, and the capillary tube. A solenoid reversing valve operates the unit in reverse cycle. An evaporator pressure regulator allows the two evaporators to run at various pressures and temperatures.
Controls include a high pressure switch, low pressure switch, low pressure gauge, and high pressure gauge. An electrical control box mounted on the front panel houses on/off switches for the evaporator and condenser, a reverse cycle switch, an overload, and an earth leakage circuit breaker for protection against earth leakage.
The unit is mounted in a steel frame with stainless steel base and back panels.
Reverse Cycle Refrigeration & AC Training Unit PolarX – 536, Technical Specifications
| Component | Type / Detail |
|---|---|
| Condensing Unit | High starting torque motor with built-in winding protector, air-cooled condenser, liquid receiver, water-cooled condenser |
| Forced Air Evaporator Coil Block | Copper tube with fins |
| Static Evaporator Coil Block | Same as free convection air evaporator |
| Flow Controls (Forced Air) | Automatic expansion valve, internal equalized thermostatic expansion valve, external equalized thermostatic expansion valve, selection by hand wheel valve |
| Flow Control (Static) | Capillary tube, selection by hand wheel valve |
| Reverse Cycle Operation | Evaporator pressure regulating valve for dual temperature operation, high pressure switch, low pressure switch, low pressure gauge, high pressure gauge, sight glasses, check valves, hand valves |
| Frame | Steel frame with stainless steel base and back panels |
| Condenser | Fan Cool, Continuous Tubing and External Finned |
| Evaporator | Forced Air, Heat Absorbed, Continuous Tubing and External Finned |
Technical Data
Pressure Gauges
| Parameter | Value |
|---|---|
| Suction Side (low pressure gauge) | -1~16bar |
| Delivery Side (high pressure gauge) | -1~25bar |
Liquid Receiver
| Parameter | Value |
|---|---|
| Maximum Working Pressure | 450psig |
| Capacity | 1.2L |
Filter Drier
| Parameter | Value |
|---|---|
| Maximum Working Pressure | 450psig |
Digital Multifunctional Power Meter
| Parameter | Value |
|---|---|
| Range of AC Volt | 0~500 volts |
| Range of AC Ampere | 0~40 Ampere |
Pressure Safety Switch
| Side | Value |
|---|---|
| Suction Side | Not specified |
| Delivery Side | Not specified |
Temperature Sensor
| Parameter | Value |
|---|---|
| Range | -40~400°C |
| Type | Type-k |
| Total | 07 |
Key Features
- Dual Evaporator Operation: Two evaporators run on a single compressor via evaporator pressure regulator
- Application: Reverse Cycle Refrigeration & AC Training Unit for combined refrigeration and air conditioning study
- Condensing Unit: Air-cooled condenser, liquid receiver, high starting torque motor with built-in winding protector
- Water-Cooled Condenser: Automated condenser pressure regulator
- Evaporator Coil Blocks: Copper tube with fins (static and forced air)
- Flow Control Options: Automatic expansion valve, internal/external equalized thermostatic expansion valves, capillary tube
- Reverse Cycle Function: Solenoid reversing valve for dual-temperature operation
- Safety Controls: High and low pressure switches, high and low pressure gauges
- Electrical Protection: Overload and earth leakage circuit breaker
- Temperature Sensors: 7 x Type-k, range -40~400°C
- Construction: Steel frame with stainless steel base and back panels
Construction and Design
The Reverse Cycle Refrigeration & AC Training Unit PolarX – 536 is mounted in a steel frame with stainless steel base and back panels. The condensing unit includes a high starting torque motor with built-in winding protector, an air-cooled condenser, a liquid receiver, and a water-cooled condenser with an automated condenser pressure regulator. Both the static and forced air evaporators use a copper tube coil block with fins. Flow controls are selected by hand valve and include the automatic expansion valve, internal and external equalized thermostatic expansion valves, and capillary tube. A solenoid reversing valve enables reverse cycle operation, while an evaporator pressure regulator allows the two evaporators to run at different pressures and temperatures. An electrical control box on the front panel houses the on/off switches, reverse cycle switch, overload, and earth leakage circuit breaker.
Software
PolarX – 536 (optional). A DAQ software package, specially designed in National Instruments LABVIEW environment, measures and calculates the results of the apparatus. When the software is used, a set of electronic sensors is included. The software can be run on any Windows environment.
Scope of Delivery
- 1 Experimental module
- 1 Instruction manual
Q: How does the unit operate two evaporators with one compressor?
A: An evaporator pressure regulator allows the two evaporators to run at various pressures and temperatures on a single compressor.
Q: What enables reverse cycle operation?
A: A solenoid reversing valve is used to operate the unit in reverse cycle.
Q: What flow control options are available for the forced air evaporator?
A: The automatic expansion valve, internal equalized thermostatic expansion valve, external equalized thermostatic expansion valve, all selected by hand wheel valve.
Q: What safety protections are built into the electrical control box?
A: The control box includes an overload and an earth leakage circuit breaker for protection against earth leakage, along with on/off switches for the evaporator and condenser and a reverse cycle switch.
Q: Is the DAQ software required to run the unit?
A: No. The PolarX – 536 software is optional, and a set of electronic sensors is included when the software is used.
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