For High Low temperature Test Chamber, high and low temperature Thermal Shock Test Chamber below -40 ° C, the refrigeration system needs to choose cascade refrigeration. Common cascade refrigeration is generally divided into two parts, a high temperature part and a low temperature part. Thermal Shock Tester Manufacturers tell you the two parts of the refrigerant are also different. Usually, the high temperature part uses medium temperature refrigerant, commonly used as R404A; the low temperature part uses low temperature refrigerant, commonly used as R23. Each consists of a separate refrigeration system using a single refrigerant (either single-stage compression or two-stage compression), but the high-temperature part and the low-temperature part are connected by a condensing evaporator, and the refrigerant in the high-temperature partial cooling system Evaporation is used to condense the refrigerant in the low temperature part of the system. This is the principle of High Low temperature Test Chamber.
In this way, the refrigerant in the low temperature portion absorbs heat (i e, the amount of refrigeration) in the evaporator to the object to be cooled, and transfers the heat to the refrigerant in the high temperature portion, and then transfers the heat to the cooling medium (water or air). Since both the high and low temperature parts can select a suitable refrigerant according to their respective working temperatures, it can meet the suitable evaporation pressure at a lower evaporation temperature and the moderate condensation pressure at an ambient temperature.
Copyright © AI SI LI (China) Test Equipment Co., Ltd. All Rights Reserved | Sitemap