Refrigerator Model Training System Didactic Equipment Vocational Training Equipment Refrigeration Laboratory Equipment

AY20260417-LA01 Refrigerator Model Training System Didactic Equipment Vocational Training Equipment Refrigeration Laboratory Equipment
1. Scope of Supply
The supplier shall provide complete Basic Refrigeration Training Device, fully assembled, tested, and ready for operation, including all standard accessories, documentation, and training materials as specified herein.
The equipment shall be designed for vocational and technical education in refrigeration and air-conditioning fundamentals with RFID power management system including installation, operation, control, maintenance, and troubleshooting.
2. General Description
The Basic Refrigeration Training Device shall be a fully operational refrigeration system configured on a movable training bench. The system shall replicate the structure and working principles of a split-type air-conditioning unit and allow hands-on practice of:
Refrigeration cycle operation
Electrical control circuit wiring
System commissioning and debugging
Maintenance and fault diagnosis
Performance measurement and analysis
The system shall include clearly arranged and labeled components, transparent observation ports, complete refrigeration piping, and fully wired electrical circuits suitable for instructional use.
Refrigerant used shall be R134a or equivalent environmentally acceptable refrigerant.
3. Construction Requirements
3.1 Mechanical Structure
Bench-type structure constructed from aluminum profile and sheet metal
Overall dimensions (Minimum):
1200 (L) × 700 (W) × 1600 (H) mm
Mounted on four casters:
oTwo (2) with brakes
oTwo (2) without brakes
Front demonstration panel with:
oScreen-printed refrigeration circuit diagram
oColor-coded piping (red/blue to indicate refrigerant state)
oClearly marked component layout

4. Technical Parameters
Parameter    Requirement
Power Supply    Single-phase 220V ±10%, 50Hz
Rated Current    16A (Minimum)
Refrigerant    R134a or equivalent environmentally acceptable refrigerant.
Cooling Type    Direct expansion
Protection    Earth leakage circuit breaker
5. Main Components and Specifications
The system shall include, but not be limited to, the following components:
5.1 Refrigeration Components
1.Compressor
oPower: 1/3 HP (minimum)
oVoltage: 220V AC, 50Hz
oCompatible with R134a or equivalent gas
2.Condenser
oNatural cooling
oRefrigerant ports: 6.4 mm inlet/outlet (minimum)
oAdjustable fan speed (if applicable)
3.Evaporator with Fan
oDirect expansion type
oPorts: 1/4" (minimum)
oInternal volume approx. 412 × 310 × 290 mm (±10%)
oIncludes refrigerator and freezer compartments
4.Throttling Device
oCapillary tube type
5.Filter-Drier
o1/4" service ports (minimum)
6.Service Valves
oHigh-pressure and low-pressure ports (1/4") (minimum)
7.Manual Valves
oFlare-threaded connection
o1/4" pipe diameter (minimum)
8.Sight Glass
oInstalled on liquid line, suction line, and evaporator inlet (3 pcs)
5.2 Instrumentation and Measurement
1.Low-Pressure Gauge
oRange: -30 ~ 260 psi / -0.1 ~ 1.8 MPa
2.High-Pressure Gauge
oRange: -30 ~ 550 psi / -0.1 ~ 3.8 MPa
3.Analog Voltmeter
o0 ~ 250 V
4.Analog Ammeter
o0 ~ 10 A
5.Digital Thermometers (4 pcs)
oRange: -40°C to +90°C
oNTC thermocouple (10KΩ at 25°C)
6.High/Low Pressure Controller
oFlare threaded connection
oPipe diameter: Φ6 mm
5.3 Electrical System
Earth Leakage Circuit Breaker (220V, 16A)
Self-locking key switch
Emergency stop button (self-locking)
Overload protector (10A) (minimum)
Indicator lights (minimum 5 pcs)
Digital temperature controller and sensor
Complete control wiring ready for training exercises
6. RFID Power Management System (Mandatory)
The system shall include an integrated RFID-based power management system with the following features:
Operating frequency: 13.56 MHz (High Frequency)
Communication via RS485 or standard
Audible status prompts
LED indication
OLED display for card number and error codes
Data verification function
Parameter configuration software
Support for:
oISO-15693 protocol
oModBus_TCP
oModBus_RTU
The RFID system shall allow card-based activation of the equipment and enable instructional management control.
7. Standard Accessories
The following accessories shall be supplied:
1.Dual compound pressure gauge set (for R404A, R407C, R134a, R22)
2.Digital thermometer
3.AC clamp meter (600V AC/DC, 600A AC, capacitance & resistance measurement)
4.Vacuum pump (1L capacity)
5.Tool kit including:
oOxygen cylinder (2L)
oFuel gas cylinder
oWelding torch
oToolbox
6.R134a refrigerant (1 unit)
7.Neon test light (12–250V)
8.Experiment manual (1 copy)
8. Functional Capabilities
The equipment shall support the following instructional exercises:
1.Compressor wiring practice
2.Refrigeration control circuit construction
3.System start-up and operation management
4.Refrigeration characteristic analysis
5.Mollier diagram plotting
6.System performance calculation
7.Troubleshooting and fault diagnosis
8.Pressure and temperature measurement
9.Refrigerant charging and evacuation practice