开云体育

Technical description
    The THPKB-E1 air conditioner/refrigerator refrigeration & heating training system is designed with concept of Competence Based Education (CBE). It is recommended for the education of refrigeration technology, refrigeration fluid machinery, maintenance of refrigeration equipment, etc. Also, it is ideal equipment for bringing up person with ability of upgrade, design, installation, commissioning, maintenance, and management of air conditioning and refrigerating system.
    Features:
    (1) Combines simulated air conditioner and refrigerator, and provides actual refrigeration unit.
    (2) Both air conditioning system and direct/indirect cooling refrigerator system are available, satisfying the examination requirements for air conditioners and refrigerators.
    (3) Integrates refrigeration system of air conditioning and refrigerator, electrical control system, and fault insertion system.
    (4) Clearly shows inner components layout and refrigerating cycle system structure, demonstrates operating principle of a heat pump type air conditioner; comes with AC voltmeter, AC ammeter, thermometer, vacuumatic pressure gauge, pilot lamps, and LEDs to show the system real-time status; sight glasses are equipped for observing the refrigerant's state; high-pressure pipelines are marked with red color while low-pressure pipelines with green.
    (5) Fault insertion function, facilitating examination of students' skills.
Specifications
    (1) Power supply: single-phase three-wire AC 220V±10% 50Hz
    (2) Power capacity: ＜1.2kVA
    (3) Dimensions: 1580×730×1700mm
    (4) Refrigerant: air conditioner R22, refrigerator 600 a
    (5) Safety protection: current type and voltage type earth-leakage protections
Hands-on exercises
    Junior mechanic skills training
    (1) Basic operation of special tools  in refrigeration system
    (2) Pipe welding of refrigeration system
    (3) Leak hunting of refrigeration system
    (4) Vacuumizing and refrigerant charging of refrigeration system
    Intermediate mechanic skills training (design, installation, commissioning, examine and repair)
    (1) Commissioning of air-conditioning system
    (2) Commissioning of direct cooling refrigerator
    (3) Commissioning of indirect cooling refrigerator
    (4) Malfunction of refrigerator refrigeration system
    (5) Malfunction of air conditioning refrigeration system
    (6) Troubleshooting for refrigerator
    (7) Troubleshooting for air conditioner
System configuration
    The training system consists of power control panel, workbench, fault insertion box, test box, etc.
    (1) PKB-01 power control panel
    Iron with high density plastic-sprayed construction is adopted for this control panel with aluminum faceplate, it provides AC power supplies, various measuring instruments, and necessary devices:
    1) ac supply control unit: single-phase three-wire 220 V supplied, two AC voltmeter with measuring range of 0～250V to monitor the grid voltage, two AC ammeters with ranges of 0～5A and 0～10 A to monitor the system start current and operating current, a RCCB and a key switch to control the power supply to the control panel.
    2) Pressure detection unit: offers four vacuum gauges, measuring ranges -0.1～3.5MPa , -0.1～1.5MPa, used to monitor pressures at high-pressure and low-pressure sides respectively.
    3) Temperature detection unit: provides two digital thermometers ( -digit display).
    4) A set of current type leakage protection: it will be activated to cut off the power supply once the earth-leakage current exceeds a certain value, also a thermal protection device is available to protect the compressor against overthermal and overload.
    (2) PKB-02 workbench
Iron with high density plastic-sprayed construction is adopted for the workbench whose surface is fireproof, waterproof, and wear resistant, the design of drawers facilitates storing wires and facilities. It is moveable with integrated multi-direction lockable castors.
    (3) Fault insertion box
    This system provides two fault insertion boxes, one (with 21 fault inserting switches) for simulating air conditioning faults, another (with 18 fault inserting switches) for refrigerator faults; fault types: power circuit, temperature sensing circuit, drive circuit, compressor protection circuit, indoor fan speed control circuit, etc.
    (4) Test box
    The test box is designed for measurement, analysis, and troubleshooting for electrical system of air conditioner, direct cooling refrigerator, and indirect cooling refrigerator.
Fault description
    (1) Faults in a heat pump split air conditioner:

    (2) Faults in a direct cooling/indirect cooling refrigerator