I. how to prevent dust in production equipment
(1) if the production equipment used is easy to produce dust, it can be arranged at the wind tail location under possible conditions;
(2) cover up the dust generating parts due to wear and cutting;
(3) when operating the equipment, in order to avoid rolling up the nearby dust, the action should not be too large, and the contact with parts or products should be minimized
(4) the production equipment shall be equipped with bypass valve to avoid pollution caused by gas or liquid retention
(5) filter equipment must be installed for all facilities where chemical substances are supplied into production equipment
Operating room purification workshop purification laboratory purification
II. How to maintain and manage the dust-free room
1. Environmental monitoring and management
Measure the operation environment of the clean room regularly every day, such as temperature, humidity and the number of micro dust particles, to ensure the indoor environment quality. If there is any abnormal data, emergency treatment can be made in time.
2. Do a good job in building maintenance and management
(1) the interior of the building shall be regularly inspected for cleaning and maintenance
(2) windows and doors should be maintained regularly
(3) the floor shall be cleaned regularly and the damaged part shall be renewed
(4) the partition wall and ceiling shall also be inspected regularly for cleaning, sealing, etc
3. Do a good job in the maintenance and management of dust-proof air conditioning equipment
(the iron box is equipped with dust adhering paper, which can effectively eliminate the foreign matters in the air flow, so as to reduce the density of air foreign matters.)
(1) refrigeration host, pump, boiler and cooling water tower: regularly check and maintain, record operation status and water quality change analysis to adjust dosage, etc.
(2) temperature, humidity and concentration of fine dust particles: regular calibration and inspection. If there is equipment moving or construction, local measurement shall be made.
(3) air duct and air outlet: regularly check whether the air duct has corrosion, pollution, dust accumulation or insulation falling off.
(4) air conditioner: regularly check the diaphragm joint, internal pollution and whether the hot and cold coils are corroded.
(5) filter screen: regular inspection and timely replacement.
(6) indoor pressure: continuously monitor the indoor pressure record to maintain the positive pressure as the benchmark.
(7) blower: regularly check the operation of the blower.
(8) testing and measuring instruments: regular calibration and maintenance.
III. general failure analysis and maintenance of dehumidifier
1. Maintenance sequence of dehumidifier without dehumidification
(1) ventilation system failure
① inlet and outlet grilles:
A. artificial damage or aging cracking;
B. the air inlet or outlet is seriously blocked;
② air filter screen: blocked or damaged by dust;
③ evaporator:
A. dust on the fins of evaporator condenser;
B. the evaporator surface is frozen;
④ fan motor:
A. the capacitor is damaged;
B. fan motor shaft holding;
C. the rotor and shaft are loose;
D. shaft bending deformation;
E. bearing damage;
F. winding burnout;
⑤ blades:
A. the fixing screws are loose;
B. fan blades are deformed or damaged;
C. serious dust accumulation on the blades, seriously affecting the air output;

D. the fan blades of small dehumidifier are still stuck due to serious dust accumulation.

(2) electrical system failure
① compressor and fan do not operate:
A. the power supply is cut off;
B. the switch is not closed;
C. the socket is disconnected;
D. the voltage is too low;
E. the circuit breaker is disconnected;
F. the fuse is burnt out.
② compressor does not operate, fan operates:
A. starter failure;
B. capacitor failure;
C. overload protection.
③ compressor and fan are running: refrigeration system fails.
(3) refrigeration system failure
① refrigerant leakage;
② the refrigeration system is blocked:
A. dirty and blocked;
B. oil plug;
C. welding plug;
③ excessive refrigerant;
④ no displacement of compressor (fault)
(4) compressor failure
① poor compression, high and low pressure chamber blowby;
② the running parts are damaged and the compressor holds the shaft.
2. Troubleshooting sequence of poor dehumidification effect:
(1) the air filter screen is seriously dusty and the air flow is blocked;
(2) the air outlet absorbs obstacles and the air flow is blocked;
(3) the fan speed becomes slow;
(4) poor room sealing, large amount of outdoor wet air infiltration;
(5) the room area is too large;
(6) too many indoor wet objects;
(7) there is a lot of dust on the fins of evaporator, which reduces the effect of refrigeration and dehumidification;
(8) the evaporator surface is frosted;
(9) there is a lot of oil in the evaporator, which reduces the dehumidification effect of refrigeration;
(10) insufficient refrigerant charge;
(11) refrigerant leakage;
(12) the specification of capillary is wrong, the pipe diameter is large, and the throttling and depressurization are not enough;
(13) ice jam occurs in the refrigeration system;
(14) leakage stoppage of refrigeration system;
There is air in the refrigeration system;
(16) the compressor has poor compression and reduced displacement.
3. Maintenance sequence of dehumidifier noise increase fault:
(1) the ground is uneven, and the dehumidifier is not placed stably;
(2) parts on dehumidifier are loose;
(3) there are foreign matters in the dehumidifier;
(4) damage or deformation of fan blades causes damage to dynamic balance;
(5) starter failure;
(6) there is collision between pipelines;
(7) the fan is short of oil;
(8) fan bearing failure;
(9) excessive noise of compressor;
(10) too much refrigerant or lubricating oil is filled, resulting in liquid hammer.
4. Maintenance sequence of dehumidifier flowing water to the ground:
(1) the dehumidifier is not placed in balance, and the water connection tank is excessively inclined, resulting in water overflow;
(2) the drain hole or drain pipe of the water connection channel is blocked;
(3) the water connection tank is damaged and leaking;
(4) water leakage at the connection of outlet pipe or aging and fracture of outlet pipe.
5. Troubleshooting sequence when the compressor cannot be started:
(1) power failure, low voltage;
(2) the circuit fuse is burnt out or the switch is damaged;
(3) the starting capacitor is damaged;
(4) overheating protection is not reset or fails;
(5) various relays are not reset or fail;
(6) the motor winding is open circuit or burnt.
Shandong ed purification Engineering Co., Ltd. has strong technical strength and construction experience. According to the different needs of clean places, professional equipment is used to form different levels of clean standard space and create the most suitable production and working environment. At present, it has established close cooperation with many enterprises and is a reliable professional dust-free room purification project implementer. For more knowledge of medical purification industry, please pay attention to WeChat public address: Aide-188 (Ed purify oxygen supply).