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Commercial refrigeration energy-saving transformation (two)
author: supermarket refrigerated showcase category: walk-in display coolers Views: 558Time: 2016-08-22
commercial refrigeration energy-saving transformation (two)
4. Monitoring of electrical parameters and safety equipment should be installed between the machines and the voltage value should be recorded regularly. When the voltage fluctuation of the power grid is close to the specified range (that is, it should not be lower than 340V, and should not be higher than 420V), pay close attention to current changes and motor temperature rise to prevent motor burning accidents. Each compressor, ammonia pump, water pump, and fan should be individually equipped with an ammeter and an overload protection device. The refrigerated commercial refrigeration must be equipped with a rescue alarm device in the commercial refrigeration. Once someone is trapped in the commercial refrigeration, a distress signal can be issued near the commercial refrigeration door, and an alarm can be sent to the machine room or the duty room at the same time for timely rescue. The alarm circuit should use a voltage below 36V. Commercial refrigeration insulation materials, such as polystyrene, are flammable substances. It should be noted that cables and electrical equipment must not directly contact with such insulation board buildings to avoid fire caused by electrical accidents.
5. Other safety protection equipment
(1) In order to avoid refrigerant backflow, check valves should be installed on the high-pressure exhaust pipe of the compressor and the outlet pipe of the ammonia pump.
(2) There is a pressure equalizing pipe between the condenser and the accumulator. The equalizing pipe should be open during operation, and there are gas and liquid equalizing pipes between two or more accumulators.
(3) When the high-pressure reservoir is installed outdoors, there should be a sunshade to prevent direct sunlight and prevent the temperature from rising and affecting safe operation.
(4) The rotating parts of the machine need to be equipped with safety protection covers, and the equipment installed outdoors should be equipped with fences or railings to prevent non-operators from entering.
(5) Accident exhaust equipment is installed in the machine room and equipment room, so that harmful gases in commercial refrigeration can be removed in time when an accident occurs. The exhaust capacity is required to change the indoor air no less than eight times per hour, and buttons for emergency exhaust fans are installed indoors and outdoors, and emergency power supplies are provided to ensure that the fans work in emergency situations.
(6) The doors of the machine room and the equipment room should open outward, and there should be two entrances and exits to ensure safety. There are accident switches and fire hydrants outside the machine room. The machine room is equipped with protective equipment such as protective clothing with boots, rubber gloves, corks, pipe clamps, oxygen respirators, and rescue medicines, and put them in a convenient location for management. , Check regularly to ensure use.
(7) In order to avoid pollution to the adjacent environment and affect safety, the pressure relief pipe of the safety valve is required to be more than 1 meter higher than the eaves of the machine house, or more than 1 meter higher than the tallest building within 50 meters of the commercial refrigeration, or higher Condenser operating platform above 3 meters, And ensure that the pressure relief pipe is unblocked.
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