Recently, a well-known media person has attracted attention because of the news that the air-conditioner spontaneously releases a large amount of poisonous gas and suffocated. "Air-conditioning self-ignition" has quickly become a hot spot for the masses.
More reasons for self-ignition of air conditioning
Will the air conditioner ignite spontaneously? meeting! Zhang Jinzhuan, professor of the Fire Engineering Department of the China Armed Police College, told reporters that air conditioner installation and use, component failure and other reasons can cause air conditioning to catch fire.
Zhang Jinzhuo said that there are only six kinds of possibilities for the air-conditioning electrical circuit to fire: the power cable end connector is loose or the connection between the motor and the transformer in the air conditioner is poor, resulting in excessive contact resistance; the socket plug capacity is too small, resulting in overheating; The power cord does not match its power, causing a fire caused by overload; the insulation strength of the wires and electrical components in the machine is reduced, causing fires due to electric leakage and ignition; the insulation of the compressor seal terminal block is damaged by electric shock, igniting the overflowing frozen oil and Nearby combustibles ignite; external voltage changes cause the motor to overheat and ignite combustibles.
Zhang Jin said that the internal components of the air conditioner can also cause the air conditioner to catch fire. There are multiple motors with different functions in the air conditioner. The motor is driven by the motor, such as the fan stuck to form a "blocking", the motor bearing wear causes the rotor to sweep.æ‘š, causing the motor current to increase, causing a short circuit between turns, causing a fire; failure of the air conditioner control switch can cause a fire, such as contact of the AC relay contacts, short circuit of the electromagnetic coil.
Failure of electrical components can also cause the air conditioner to ignite. The high-temperature electric spark generated during the breakdown of the capacitor can ignite the combustibles such as the gasket inside the casing and the outer casing of the partition plate. Zhang Jinzhuo told reporters that the main reason for this kind of fire is that the power supply voltage is too high, the air conditioner is leaking due to moisture, and no moisture treatment is done.
Improper installation can also cause air conditioning to catch fire. The air conditioner is close to the flammable objects such as curtains and wooden structures, and is placed in the sunny place. Due to the long-term exposure of the sunlight, the continuous operation of the compressor will overheat and ignite; the window air conditioner usually uses a 220V power supply, and the power plug is a single-phase one-wire plug. Misconnected 380V three-phase power supply over-voltage ignition.
It is also a fire hazard to start immediately after the air conditioner stops. When the air conditioner is deactivated, the pressure difference between the inlet and the exhaust of the compressor is relatively large. If it is started immediately, the capillary will not reach the balance, resulting in an increase in load and a sharp increase in current, resulting in a fire caused by the burning of the motor.
Zhang Jinzhuo told reporters that the use of air conditioners in summer is frequent and to prevent air-conditioner fires. Pay attention to the following points:
1. Choose a good quality, good reputation air conditioner brand.
2. Ask the professional air conditioner installer to install the air conditioner and select the wire, plug and fuse that match the air conditioner.
3. The air conditioner should not be installed too close to the curtain, or the curtain fabric should be made of flame retardant fabric.
4. Using the electric heating type air conditioner, after the user stops heating, the electric heating part is cooled and then turned off.
5. Do not turn off frequently in a short time.
Editor in charge: Li Qun
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