The utility model discloses an
environmental chamber high and low temperature refrigerating
system and an
environmental chamber, which comprise a high temperature refrigerating
system and a low temperature refrigerating
system which are connected through a
plate heat exchanger, and also comprise a dehumidification pipeline, a second
evaporator and a refrigerating pipeline, one end of the dehumidification pipeline is connected with the high-temperature refrigerating system, the other end of the dehumidification pipeline is connected to a dehumidification calandria in the cabin body, and a first thermostatic expansion valve and a first
electromagnetic valve are arranged on the dehumidification pipeline. According to the utility model, by isolating the operation of the low-temperature
refrigeration system during the high-temperature test, unnecessary
energy consumption is greatly reduced, and the test cost is reduced. The access mode of the dehumidifier is changed, so that the dehumidifier is ensured not to work in a low-temperature test and to work normally in a high-temperature test. By means of the optimization,
energy consumption is reduced, and meanwhile the
humidity control effect of the test environment is improved. By adding a plurality of
refrigeration pipelines and control elements, the technical scheme can realize accurate control of the
refrigeration effect, and improves the accuracy and reliability of the test.