Refrigerator heat exchanger performance measurement and control device

Abstract

The invention discloses a refrigerator heat exchange performance measurement and control device. A compressor, an auxiliary heat exchanger, a first bypass hand valve, a drying filter, a hot air passage, a flowmeter, an electric heating tape, an electronic expansion valve, a second bypass hand valve, a cold air passage and an evaporator form a loop via a pipeline. The auxiliary heat exchanger comprises a condenser, an electric heater, an auxiliary evaporator and a heat-exchange medium; the auxiliary evaporator is connected with an auxiliary compressor, an auxiliary condenser and a capillary through a pipeline. Two ends of the first bypass hand valve are connected with a measured condenser through first control valves, and two ends of the second bypass hand valve are connected with a measured evaporator through second control valves. The refrigerator heat exchanger performance measurement and control device further comprises a heat exchanger performance parameter data acquisition and measurement mechanism. By means of the refrigerant-refrigerant, refrigerant-air and system self-heating type cold and heat recovery, length of a system pipeline is shortened to the utmost extent and intermediate medium for energy transmission is reduced, thus, influence on measurement and control of small-size heat exchangers caused by external factors can be reduced effectively and then high-precision system test is achieved.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a performance measurement and control device for a refrigerator heat exchanger. Background technique [0002] At present, there are many test benches that can be used to measure the performance of heat exchangers, and there are many test methods, most of which use the refrigerant liquid flow method to measure the cooling capacity of heat exchangers. That is, under nominal conditions, measure the specific enthalpy of the refrigerant at the inlet and outlet of the heat exchanger under test and the mass flow rate of the refrigerant flowing through the heat exchanger under test, the difference between the specific enthalpy of the refrigerant at the inlet and outlet of the heat exchanger The product of the mass flow rate of the heat exchanger under test is the nominal cooling capacity of the heat exchanger under test. [0003] On the one hand, people's perception of refrigerators h...

AI Technical Summary

Problems solved by technology

[0004] On the other hand, due to the relatively small heat transfer capacity of the refrigerator evaporator and condenser, the refrigerant flow rate of the system is small, the change of the external environment has a greater impact on the test, and the test accuracy is difficult to control. It is still relatively difficult to accurately test the performance of the refrigerator heat exchanger. Difficult, there is no such test device specially for refrigerator heat exchangers (small heat exchangers) on the market

Images