supermarket refrigerated showcase » article > walk-in display coolers > Supermarket refrigerated showcase Solenoid valve disassembly, diagnosis and maintenance
Supermarket refrigerated showcase Solenoid valve disassembly, diagnosis and maintenance
author: supermarket refrigerated showcase category: walk-in display coolers Views: 526Time: 2016-08-22
Supermarket refrigerated showcase Solenoid valve disassembly, diagnosis and maintenance
Two-way solenoid valve is a dual-purpose part of electrical and refrigeration systems. Only dual-temperature dual-control or multi-temperature multi-control supermarket refrigerated showcase is equipped with this kind of device, and the valve core position is controlled by the refrigeration thermostat contact on and off to control whether the solenoid valve is energized, and the two output tubes are automatically switched Who is connected to the input tube, that is, to control which of the two capillary tubes for freezing and refrigeration is connected and which is cut off, so as to realize the automatic transfer of refrigerating supermarket refrigerated showcase and refrigerating rooms at the same time or only refrigerating the freezer. Hold on. 1. Solenoid valve disassembly or assembly depends on the damaged part.
Disassembly and assembly of the electrical part. Unplug the supermarket refrigerated showcase. Open the solenoid valve cover, remove the circuit board, and use an electric soldering iron to disassemble the damaged device. But the coil disassembly needs to be carried out according to the following steps: open the refrigeration system to bleed one > use pliers to cut off the solenoid valve to the refrigerated capillary interface > use a wrench to loosen the valve core and coil fixing screw clockwise and remove one > unscrewed and fixed In the supermarket refrigerated showcase, the screw-> retracts the coil from the spool. Installation is the reverse process of disassembly, but the coil fixing screws must be tightened, otherwise noise may be caused.
disassembly and assembly of the refrigeration part, the refrigeration system bleeds one > remember the two capillary connection pipes, weld open the solenoid valve, each welding port one > unplug each wiring one > remove the fixing screw one > to remove the solenoid valve. The installation is the reverse process of disassembly. Remember that the two capillaries must be installed to the original nozzles and cannot be mistaken. Generally speaking, the long nozzle is the frozen capillary tube, and the short one is the refrigerated capillary tube. After the refrigeration system is repaired, plug in the solenoid valve wiring, supermarket refrigerated showcase, power on and test the machine, the first two nozzles should be connected to the refrigerated capillary, and the other nozzle should be connected to the frozen capillary. When welding the capillary tube to the nozzle, the flame should be adjusted to a small value. The heating position can only be the middle of the solenoid valve nozzle, and the capillary tube cannot be directly heated to avoid thin welding and welding of the capillary tube.
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