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Supermarket refrigerated showcase compressor jam cylinder repair method (two)
supermarket refrigerated showcase compressor jam cylinder repair method (two)
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Insufficient air discharge of compressor
supermarket refrigerated showcase Insufficient air discharge of compressor is caused by carbon deposits on internal high and low pressure valves, which makes the valve not tightly closed. Loosen the cover screw of the pump body first, and tap the cover lightly with a mallet to separate the cover, valve plate, and pump body. Be careful not to damage the gasket: then remove the valve plate, and you can see the carbon deposits on the high and low pressure valves. , Use a blade to scrape the carbon deposits on the low-pressure valve. Use a grinding wheel to polish off the two rivets on the elevated pressure limiting plate. Remove the high-pressure valve plate for cleaning. If the valve plate is found to be deformed, turn it over and use it and rivet it with the same size rivet. When cleaning the valve plate, be sure not to damage the roughness of both sides of the supermarket refrigerated showcase valve plate; put in clean refrigerating oil before assembly to ensure the tightness of the low-pressure valve plate of the valve plate. If you accidentally damage the sealing gasket, you can use a whole cigarette outer packaging carton without plastic, flatten it on the lid and press it firmly to print the sealing outline, and then cut it out as a gasket. Before sawing the compressor shell, you must pour out the refrigerating oil in the compressor first. If the quality of the original refrigerating oil poured out is discolored or has impurities, it is strictly forbidden to use it.
the method of sawing the compressor shell Make a vertical mark on the shell to facilitate future closed installation, and then determine the supermarket
refrigerated showcase according to the welding method of the compressor shell. The parts are sawed with a hacksaw type hand wheel. Be careful not to let the sawdust fall into the machine. For the upper and lower shell plug-in compressors, as long as the upper and lower shell junctions are sawed to a depth of about 5 mm, a black mark is exposed at the arrow position. This black mark is just the outer edge of the upper shell or the outer edge of the lower shell. At this time, the upper and lower shells can be opened without sawing. For the butt-connected compressors outside the upper and lower shells, the protruding seams can be removed by hand with a grinding wheel
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