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Installation and laying of display cooler pipes
author: supermarket refrigerated showcase category: walk-in display coolers Views: 526Time: 2016-08-22
Installation and laying of display cooler pipes
(1) The refrigerant pipes should be sloped. The slope and direction depend on the specific pipes between each device.
(2) The liquid pipe should not locally bulge upwards, and the gas pipe should not locally sag downwards, so as not to produce airbags and liquid sacs , which hinder the flow of liquid and gas in the display cooler.
(3) When the evaporator is installed on the compressor, in order to prevent the refrigerant liquid from flowing into the compressor when the compressor is stopped, causing liquid shock when the compressor sail is started next time, the suction pipe at the outlet of the evaporator should be bent upwards. Connect with the compressor.
(4) When the evaporator is installed under the condenser or accumulator, in order to prevent the refrigerant liquid from continuing to flow to the evaporator after the compressor is stopped, the liquid pipe at the outlet of the condenser or accumulator should be bent upwards. Connect with the evaporator or install a solenoid valve on the liquid pipe.
(5) When the suction and exhaust pipes are installed on the same branch or hanger, in order to reduce the influence of the high temperature of the exhaust pipe, it is required that the distance between the upper and lower pipes should not be less than 200 mm, and the suction pipe must be in the exhaust Below the pipe: The net distance between the pipes installed horizontally should not be less than 250 meters.
(6) For pipes that need heat preservation, the supports and hangers must be lined with anticorrosive wooden lining tiles to prevent cold bridge . The size of the lining tile should meet the requirements of the insulation thickness of the display cooler.
(7) When arranging pipes and supports, the thermal expansion of the exhaust pipe should be considered, and the natural compensation of pipe bending is generally used. When exhaust ducts pass through flammable walls and floors, they should be isolated by flame-retardant materials.
(8) When the pipe passes through the floor or wall, a casing pipe should be installed. The weld shall not be placed in the casing pipe. The steel casing pipe should be flush with the wall or floor bottom surface and 20 mm higher than the ground. Between the pipe and the casing pipe The gap should be filled with heat insulation or other flame-retardant materials, and shall not be used for pipe support.
(9) The branch pipe leading from the liquid main pipe should be connected from the bottom or side of the main pipe; the branch pipe leading from the gas main pipe should be connected from the top or side of the thousand pipe. There are two or more branch pipes connected to the thousand pipes, and the connection distance should be staggered.
(10) When the pipeline is connected to the compressor or other equipment, the counterpart must not be forced to reduce the force and moment attached to the equipment and weaken the metal fatigue effect.
(11) The suction and discharge pipes connected to the compressor must be equipped with separate brackets, so that the display cooler compressor does not bear the pipe gravity. For copper pipes with a pipe diameter of not more than 20 mm, due to the small pipe diameter and poor material hardness, the straight horizontal pipe section of a certain span is prone to deflection, and the pipe section will be deformed at the valve. Therefore, in order to prevent deformation of the pipe section, a bracket should be installed at the valve.
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