Functional Overview:
This device is a special equipment made for the noise test of the refrigerator compressor. During the test, the inside is an independent refrigeration system. The constant pressure expansion valve can be automatically adjusted to obtain the required working conditions. The compressor noise test can be performed when the system is stable. . This device relates to the testing of operating noise performance parameters of compressors used in household refrigerators and freezers using R600a or R134a refrigerant as the refrigerant. It is mainly used for the noise test process of refrigeration compressors used in refrigerators and freezers in semi-anechoic chambers. , Provide the load device required for the normal operation of the compressor, so that the compressor can be tested according to the required working conditions.
According to the standard:
GB/T 9098-2008 "Fully enclosed motor-compressor for refrigerator"
GB/T 5773-2004 "Performance Test Method of Positive Displacement Refrigeration Compressor"
working principle:
Compressor test system, the main equipment consists of the tested compressor, calorimeter, condenser, expansion valve, temperature control system, protection system, etc. The high-pressure gas discharged from the compressor is decompressed by the expansion valve and then enters the calorimeter after heat dissipation. , The heat exchange is carried out in the calorimeter. The calorimeter is equipped with an electric heater with adjustable power and a second refrigerant to adjust the evaporation load. The low-temperature and low-pressure refrigerant gas from the calorimeter is sucked in and discharged from the compressor Complete the cycle.
In order to ensure the stable operation of compression under certain working conditions, the suction temperature, suction pressure, discharge pressure, subcooling temperature and ambient temperature must be controlled. We respectively adjust the electric heating power in the calorimeter to circulate the refrigerant flow. (Ie the opening degree of the thermal expansion valve) to achieve the above control.
Product advantages:
The traditional compressor noise test load device adopts a simple control structure of manual expansion valve, which only controls the suction pressure of the compressor, and does not control the discharge pressure of the compressor, which is different from the standard operating conditions of the compressor. The results of the compressor noise test also have a certain impact. Therefore, our company has researched and developed a high-precision and high-stability compressor test load device, which has realized the automatic dual control of the suction pressure and the discharge pressure for practical use. The test results are significant; at the same time, we have also implemented the performance test of the compressor at low voltage start in this device, which solves the disadvantage that the traditional compressor load table cannot test the low voltage start.