Product composition:

1. Cold water refrigeration system

The training platform provides a 3-horsepower semi enclosed refrigeration compressor, evaporator (water-cooled evaporator), condensing fan, filter, liquid sight glass, cold water tank, and water pump.

1) One AC voltmeter: measuring range 0-250V, accuracy level 1.5, used for monitoring power supply voltage.

2) Three AC ammeters with a measurement range of 0-5A and an accuracy level of 1.5 are used to observe the starting current and normal operating current of the system.

3) 1 thermometer: using PT100 sensors, 6 sensors, switched by band switches, can measure the temperature of the freezer, refrigerator, condenser inlet and outlet separately.

4) Two vacuum pressure gauges: measuring ranges of -0.1 to 0.9MPa and -0.1 to 1.5MPa, capable of displaying the pressure on both the low-pressure and high-pressure sides of the system.

5) One water-cooled evaporator: a dry evaporator with a 1-inch outlet and a 1-inch inlet.

6) One refrigeration water pump: 220W/220W centrifugal refrigeration water pump.

7) One water-cooled condenser: shell type, 1 inch outlet and 1 inch inlet.

8) One cooling water pump: 550W/220W centrifugal cooling water pump.

9) One cooling tower: glass structure, water flow rate 3T.

10) One cooling fan: axial flow 220V, air volume 1800mS.

11) One water machine controller: 3030.

(10) One electronic expansion valve: 4P.

(12) Heater: 3KW is used to balance the cooling capacity of the refrigeration unit.

(13) The training platform is designed with an independent fault setting system, and various fault phenomena simulate actual fault situations, achieving full simulation of actual circuit faults, which is more conducive to students' understanding of actual electrical control circuits and familiarity with actual fault situations.

2. Cooling capacity adjustment control device:

1) By automatically adjusting and increasing the refrigerant flow rate, the exhaust temperature of the compressor can be effectively reduced, and the high-efficiency working area of the compressor can be expanded. By adopting a bidirectional electronic control system, it is possible to achieve energy-saving control and automatic flow adjustment of bidirectional heat pump functions, cold storage control, air refrigeration units, variable frequency units, and central air conditioning units.

2) Software control, capable of online temperature control of the system, reading the flow rate opening of the refrigeration refrigerant in the temperature system, adjusting the superheat and subcooling of the refrigeration unit. On the left side of the text display interface, real-time operational data of the current unit is displayed in the form of text. On the upper right side of the interface, there is a display of communication information, including the settings of communication roles and ports, as well as the display of the current communication status. In the lower part of the "Data Information" on the right side of the interface, display information such as which data frame is currently received, the address of the received data frame, etc. It has online and manual adjustment functions with upper computer regulation.

3) System features/Debugging control software:

A）、 4-channel real-time temperature display: The controller simultaneously detects the temperature of multiple cooling points in the system to control the subcooling/superheat of the unit.

B）、 Real time display of valve opening: The control object is set to a maximum opening of 500P. The refrigerant flow rate of the self cooling system can be set to a small opening.

C）、 24 channel parameter control parameter setting: All 24 parameters related to control, such as temperature parameters, time parameters, and control parameters, can be adjusted in the controller to adapt to equipment such as refrigeration/heat pumps/cold storage/water machines.

D）、 Automatic adjustment: The device has a power-off memory function during operation, keeping the current value unchanged. Ensure valve opening under refrigeration/heat pump/cold storage/water machine conditions.

E)、 The 6-channel user simulated environment data input settings are shown in the following figure: During debugging, software simulation settings can be used to simulate the valve opening status of the refrigeration unit under various temperature conditions to accumulate a large amount of data, so as to set the standard valve opening value according to the characteristics of each refrigeration unit. Refer to the 24 channel parameter settings for specific details.

F)、 Up to 8 channels of equipment operation monitoring: online monitoring of the operating status of the compressor, expansion valve, temperature at each point, and protection action circuit of the unit.

G)、 Control range of subcooling/heat: 2-15 degrees Celsius. You can set the subcooling and superheat values of the refrigeration unit to provide design data.

H)、 Refrigerant: Suitable for other refrigerants such as R134AR22R410A.

4) Offline manual setting

A) Temperature and opening can be displayed and queried/set: All temperatures detected by the controller can be queried, and the opening can also be queried and displayed in real-time.

B) Adjustment function: During the development and debugging phase of the unit, the controller can manually adjust the function to obtain effective test data.

C) The digital display shows the opening, temperature, and fault codes online.

D) The digital display shows the opening, temperature, and fault codes online.

5) Curve display interface.