In compression refrigeration systems

an excellent distributor can provide an evaporator with the best heat transfer performance. This study develops a Venturi-type patent CX-distributor

which is composed of a Venturi injection inlet and distributor body. A comparative analysis is conducted between the CX-distributor and the Venturi distributor which is widely used at present. The contrast experiment is conducted in the R410A bus air-conditioning system

and the other parts except the distributor of the system are kept unchanged

including the same R410A charge quantity. Then

a comparative performance experiment of the system is performed under standard working conditions. The experimental results show that

compared with the original distributor

the refrigerant flow resistance of the CX-distributor is reduced by more than 50%

and the uniformity of the temperature distribution at the refrigerant outlet of the evaporator can be improved. Moreover

the refrigeration system performance using the CX-distributor is better than that of the original system. When the system is rated at a constant compressor air volume and frequency

the degree of subcooling of the CX-distributor system is 1–2 °C higher than the original system

the average refrigerating capacity and coefficient of performance increase by an average of 4% and 2.6%

respectively

and the electronic expansion valve opening is only half of that of the original distributor.