High and low temperature refrigeration systems

　　　Original Source: description of the refrigeration system of the high and low temperature: Linpin Instrument
　　air conditioner expansion valve is the first major component of the high and low temperature refrigeration unit, to adjust and manipulate the total refrigerant flow and pressure into the air conditioner evaporator Key "boundary line" equipment, are high-pressure side of the low pressure, not only linked to all programmable high and low temperature heat chamber refrigeration unit test whether everything works, and are considered a key technical operator height marked.

　　Adjust the high and low temperature air conditioner expansion valve sure to carefully carry out carefully, adjusting the working pressure after the air conditioner evaporator sure boil heat exchanger (volatile), and then reflects the breathing cavity to a refrigerant compressor in accordance with the gauge into the pipe, must be a full-time course. Each air conditioner expansion valve is turned back, typically after 10 - 15 minutes can be adjusted for an operating pressure in the air conditioner expansion valve smooth breathing gauge.
　　High and low temperature refrigeration compressor working pressure breathing, air conditioner expansion valve is the critical pressure with reference to the main adjustment parameters. Air conditioner expansion valve opening degree is small, the total flow of refrigerant less based, low working pressure; air conditioner expansion valve opening degree, based on the total flow of the refrigerant more than the working pressure is high. Heating characteristic based refrigerant, the lower the operating pressure, the temperature should be of relatively more low; the higher the operating pressure, the temperature should be of relatively more tall. In accordance with the basic laws, if the air conditioner expansion valve working pressure is too low doorway, relatively volatile low operating pressure and temperature. However, because the reduction of the total flow into the air conditioner evaporator, reducing the operating pressure, resulting in evaporation rate mitigation, and reduce the capacity (time) the amount of air conditioning and refrigeration, reduce refrigeration efficiency.
　　High and low temperature operating pressure and temperature to reduce damage to the air conditioner expansion valve to adjust the air conditioning expansion valve as possible to the level of the inlet pipeline, a temperature sensor package to be strapped back bronchus (base pressure tube) side Zhongyangzhengfu site. All the air-conditioning expansion valve normal operation, the frost in the oblique passage stiffened, non-blooming channel side, or there should be regarded as the channel ice block or filter fouling. When the air conditioner expansion valve work is very quiet, if spread more significant "slightly" sound, indicating that not enough refrigerant in the system software. When the air conditioner expansion valve when the temperature sensor system failure occurs common software steam leakage, etc. to be removable adjustment ineffective.