The expansion of high and low temperature test chamber pneumatic valve fault solution

when the high and low temperature test chamber in the refrigeration system expansion pneumatic valve for liquid waxing or pneumatic valve clearance, degree of superheat, degree of supercooling phenomenon such as incorrect. The reason may is the temperature there is something wrong with the package.
thermal capillary rupture, make thermal bags of filling missing, lead to can not pass the right signals to thermal expansion of the pneumatic valve of institutions.
thermal bag bandage position is not correct.
2, heat treatment method of the fault
general heat packs as far as possible in the evaporator export levels of muffler, should stay away from the high and low temperature test chamber compressor suction mouth in the recent evaporator, and should not be installed vertically. When levels of return airway diameter less than/( Mm, thermal BaoYi installed on the upper back to the top of the trachea, and the suction pipe of '1'. When level back to the trachea diameter/thermal package to install in the following the muffler axis and horizontal axis into degrees, namely 'o 'clock' position of the suction. Because the heat pack installed on the suction of ministries reduce the sensitivity of response, may be too much as refrigerant in the evaporator, the heat pack is installed in the bottom of the suction pipe can cause fluid for disorder, because there is always a small amount of liquid refrigerant flow to the heat pack installation position, causes the heat temperature change rapidly.
when installation, thermal bag need copper dressing well, back to the trachea derusting, if it is steel, the surface derusting after silver paint, to ensure a good contact with the muffler heat pack. Temperature must be lower than the pneumatic diaphragm valve top cavity, and thermal bag head to horizontal or down, when the relative position is higher than on the diaphragm chamber, high and low temperature test chamber capillary should be bent into a U shape up, in order to avoid the liquid into the cavity on the diaphragm.
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