AUTOMATIC MEASURING UNIT OF REFRIGERANT CONTAMINATION INDEX AND LiBr SOLUTION CONCENTRATION USING THE CONDUCTIVITY IN ABSORPTION REFRIGERATOR

摘要

The present invention relates to an apparatus for automatically measuring the refrigerant contamination and lithium bromide solution concentration of a refrigerator to measure the refrigerant contamination of the refrigerator and the concentration of lithium bromide solution in real time. An absorbent pump for supplying the dilution solution in the absorber to a high temperature regenerator Wow; A solution concentration detection conductivity meter installed in the high temperature regenerator outlet pipe and checking the response potential of the solution flowing in the pipe in real time to detect the concentration of the lithium bromide solution; A refrigerant circulation pump circulating the refrigerant liquid into the evaporator and circulating the refrigerant liquid into a high temperature regenerator when the refrigerant is contaminated; An absorption solution pump for circulating the absorption solution from the absorber outlet to the high temperature regenerator side; A coolant contamination detection conductivity meter installed in the coolant circulation pump outlet side pipe to check a response potential of the coolant flowing through the pipe to detect the contamination of the coolant; An absorption solution shutoff valve configured to receive the detection signal from the conductivity meter for detecting the concentration of the solution and recycle the same to a high temperature heat exchanger; A shutoff valve installed at an outlet side of the refrigerant circulation pump to induce refrigerant circulation to a high temperature regenerator when a refrigerant pollution degree of a predetermined value or more is reached; It characterized in that it comprises a control unit for controlling the shut-off valve in accordance with the signal of the solution concentration detection conductivity meter and refrigerant contamination detection conductivity meter.