Compressor(compressor), A driven fluid machinery that promotes low-pressure gas into high-pressure gas, and is the heart of the refrigeration system. It sucks in low-temperature and low-pressure refrigerant gas from the suction pipe, drives the piston to compress it through the operation of the motor, and discharges the high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle to achieve compression→Condensation(heat release) →Expansion→Evaporation(endothermic)of the refrigeration cycle.

The linear compressor uses the magnetic levitation principle and the spiral ring fluid mechanics structure to compress the gas and provide power for refrigeration.

Compressor piston compressor, screw compressor, centrifugal compressor, linear compressor, etc. Piston compressor generally consists of shell, motor, cylinder, piston, control equipment(Starter and thermal protector)and cooling system. Cooling methods are oil-cooled and air-cooled, natural cooling three. The linear compressor has no shaft, no cylinder block, seal and heat dissipation structure.

The compressors of general household refrigerators and air conditioners are powered by single-phase alternating current. Their structural principles are basically the same, but the refrigerants used by the two are different.

“DB-JD55Refrigeration compressor performance test training device”It adopts vapor compression refrigeration cycle system, equipped with fully enclosed refrigeration compressor, condenser, evaporator and other real parts of the refrigeration system, and is equipped with intelligent temperature regulator, flow meter, pressure gauge, voltmeter, ammeter and other measuring instruments. Not only can set up the measurement of the performance parameters of the refrigeration compressor training, but also the demonstration of the basic principles of the refrigeration cycle training. It is applicable to the teaching and training of refrigeration related courses in vocational colleges.

1. teaching modelDevice Features

1.This training device in accordance with international standardsGB/T 5773-2004Volusive refrigeration compressor performance training method is established“Evaporator liquid carrier circulation method”as the primary measurement,“Water-cooled condenser calorimeter method”As an auxiliary measurement

2.Adopt1A refrigeration unit, the condenser and evaporator are shell and tube water heat exchangers, the system has a compact structure, reasonable layout, and beautiful appearance

3.It is equipped with voltage leakage protection, current leakage protection, overcurrent protection, overload protection and grounding protection, which can effectively protect people and equipment.

2. teaching modelTechnical performance

1.Input power: single-phase three-wire ~220V±10% 50Hz

2.Working environment: temperature-10℃~ 40℃Relative humidity<85%(25 ℃)Elevation<4000m

3.Device capacity:<2.5kVA

4.Refrigerant:R22

5.Cooling capacity:1.3kW

6.Weight:100kg

7.Overall dimensions:120cm × 60cm × 142cm

3. teaching modelBasic configuration and function

1.Control screen

It adopts double-layer matte dense grain spray structure, with novel shape. The top layout of the refrigeration system, can visually display the structure of the refrigeration system;The front is provided with power control and measuring instrument function board. The bottom is equipped with four universal wheels with brakes for easy movement and fixation.

2.AC control unit

Single-phase three-wire220VAC power supply, total power supply controlled by leakage current protector, action current30mA

3.Refrigeration system

1Fully enclosed compressor, horizontal shell and tube condenser, liquid mirror, dry filter, manual throttle valve, accumulator and dry evaporator

4.teaching modelcirculating water system

(1)Water pump2Only

The main technical parameters are:

Rated power:95W

Rated lift:6m

Rated flow:1.08cubic meter/Hours

(2)Water tank2Only

Made of stainless steel, respectively, condenser circulation water tank and evaporator circulation water tank

(3)Heater1Only(Power1000W)

Output power can be adjusted by potentiometer for heating evaporator circulating water

5.teaching modelMeasuring instrument

(1)power meter2Only(Accuracy0.5Level)

The heating power and the compressor power are measured separately. The intelligent control mode of man-machine dialogue is realized through keying and digital display window, which can measure the active power, reactive power, power factor, voltage, current, frequency and the nature of the load.;And can be stored, query15Test data for group power and power factor

(2)Digital display thermometer1Only(Accuracy0.5Level)

AdoptPT100Platinum resistance as sensor, measuring range-50~150 ℃. Switch through the keys, common test8Group temperature parameters, respectively, compressor inlet temperature, compressor outlet temperature, condenser outlet temperature, evaporator inlet temperature, condenser inlet temperature, condenser outlet temperature, evaporator inlet temperature and evaporator outlet temperature

(3)Vacuum pressure gauge2Only(Accuracy2.5Level)

Range is-0.1~1.5MPaand-0.1~3.5MPa, respectively, real-time measurement of the low-pressure side pressure and high-pressure side pressure of the refrigeration system

(4)Flowmeter2Only(Accuracy0.5Level)

Using glass rotameter, measuring range is16~160ml/min, Measure the cooling water flow of condenser and evaporator respectively

6.teaching modelControl instrument

High and low pressure controller1Only: Real-time monitoring of the low-pressure side pressure and high-pressure side pressure of the refrigeration system. When the high pressure is higher than the set value or the low pressure is lower than the set value, the controller sends a control signal to cut off the power supply of the compressor

4. teaching modeltraining project

1.Familiar with the basic structure and working principle of the vapor compression refrigeration cycle system

2.Understanding International StandardsGB/T5773-2004Method of using the performance of positive displacement refrigeration compressor

3.Using evaporator liquid carrier circulation method(main measuring method)Seek refrigerating capacity of refrigeration compressor

4.Heat balance method using water-cooled condenser(auxiliary test method)Seek refrigerating capacity of refrigeration compressor

5.Calculation and analysis of the relative error of the main and auxiliary measured cooling capacity

6.Calculation and Analysis of Energy Efficiency Ratio of Refrigeration Unit