Preheating/precooling heat exchanger
a heat exchanger and pre-cooling technology, applied in the direction of defrosting, separation processes, domestic cooling apparatus, etc., can solve the problems of skip in a high-temperature environment, the dryer will occupy too much room of the compressed air purifying system, etc., to achieve effective reduction of the burden on the coolant compressor, enhanced condensing power, and high environmental temperature
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[0012] Please refer to FIGS. 1 and 2. The preheating / precooling heat exchanger of the present invention includes a preheating / precooling exchanger 1, an evaporator 2 and a coolant compressor 3. At least one fan 11 is disposed on outer side of the preheating / precooling exchanger 1. The preheating / precooling exchanger 1 has an intake 12 and an exhaust port 13. The intake 12 is connected with an intake duct 121 circulated inside the preheating / precooling exchanger 1 to communicate with the evaporator 2. A condensing pipe 21 is circulated inside the evaporator 2. The coolant compressor 3 supplies coolant for the condensing pipe 21. The evaporator 2 has an inlet 22 and an outlet 23. The inlet 22 is connected to the intake duct 121 of the preheating / precooling exchanger 1, whereby the compressed air goes from the intake duct 121 into the evaporator 2. The outlet 23 communicates with the preheating / precooling exchanger 1, whereby the compressed air can flow back into the preheating / precool...
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