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Commercial refrigeration refrigeration system components disassembly, diagnosis and maintenance (3)
author: supermarket refrigerated showcase category: commercial refrigeration Views: 489Time: 2016-08-22
III. commercial refrigeration evaporator disassembly, diagnosis and maintenance
General commercial refrigeration The evaporator is hidden in the commercial refrigeration body and cannot be disassembled and repaired. Leaks are only available Inlaid hair dropper in freezing and cold storage rooms. Hair droppers can be purchased. But it is most practical to make yourself with copper pipes. A few commercial refrigerations use exposed evaporators, which can be removed for repair. At present, copper pipes are generally used in commercial refrigeration evaporators, so the failure rate is low.
1. Evaporator disassembly and assembly
(1) The method of disassembly and assembly of the exposed evaporator depends on whether the original evaporator is exposed, built-in or embedded. Schematic diagram of the disassembly of the exposed evaporator, open the compressor process pipe port to vent-> open the commercial refrigeration body back up and down the evaporator interface box-> weld open the evaporator connection pipe port-> for the pumping and smoking-> for the drawer For the evaporator, the trachea should be straight, >, remove the temperature sensor head of the thermostat, >, pry off the evaporator fixing clip or unscrew the fixing screw, > to take out the evaporator. Installation is the reverse process of disassembly ‘ Attention should be paid when disassembling: the connecting pipes of the refrigeration and freezer compartments should be marked, so as to avoid the installation error causing the change of the refrigerant flow direction and affect the refrigeration; Copper pipes are bent or broken: Use even force when prying the plastic clip of the evaporator to prevent prying the clip or damaging the internal bladder of the commercial refrigeration. When installing the drawer evaporator, align all layers of the evaporator with the evaporator fixing groove in the freezer before installing.
(2) The built-in evaporator is changed to a mosaic evaporator. The so-called mosaic evaporator is to throw off the commercial refrigeration. The built-in evaporator is not used. Fix the finished evaporator or the evaporator made of copper tube coil in the commercial refrigeration internal freezer or The surface of the refrigerator compartment. Before mounting, it is necessary to drill holes in the commercial refrigeration body to insert the evaporator pipeline. The principle of drilling is to make the pipeline connection closest, including the upper and lower evaporator connections and the connection between the lower evaporator and the compressor. The common failure mode of
is that the commercial refrigeration coil is open, short-circuited, unable to switch, and internal damage to the spool. For solenoid valves that cannot be switched, knock them with a screwdriver first. If there is no response, they can only be replaced.
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