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Air conditioner explodes, seriously injuring two mechanics


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Air conditioner explodes, seriously injuring two mechanics

By The Nation

 

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An explosion near a beauty salon has seriously injured two air-conditioner mechanics and damaged six parked cars in Bangkok’s Hua Mak district. The salon was also badly damaged by the explosion.

 

The salon’s owner, Ruetaipatr Mapakdee, also suffered minor injuries in the blast, which occurred near the back of the shop.

 

The two mechanics were fixing the air conditioner when the blast took place. They were rushed to a nearby hospital.

 

Source: http://www.nationmultimedia.com/news/national/30311169

 
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9 hours ago, mahjongguy said:

It appears that both the indoor and outdoor units exploded. Given that the refrigerant is not flammable, can anyone suggest how such a thing could happen?

I have to agree, I have absolutely no clue about this story, unless they were using welding equipment or operating a bomb making factory or who knows what, one thing I do know is that an aircon unit did not cause this explosion............................got to be one of the weirdest news stories these last few weeks, was it an attempt at an April fools joke or something ?

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9 hours ago, mahjongguy said:

It appears that both the indoor and outdoor units exploded. Given that the refrigerant is not flammable, can anyone suggest how such a thing could happen?

just maybe they charged the system with Butane by mistake , what ever happened  it sure has the making of a modern laurel and Hardy sketch

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As there is no obvious signs of fire it is possible that the refrigerant cylinder was of a poor quality, maybe never hydraulically retested, and exploded.

This would be very unusual but is possible and has happened before. As there is no sign of any fire damage the likelihood of it being caused by a leakage of LPG from a cylinder is very unlikely. Mind you one has to wonder if the fitters were trying to use LPG somehow instead of refrigerant.

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that looks like an oxygen bottle on the ground near the wall. 

oxy mixed with oil ,burns and could cause an explosion easily .

but why in gods name would they put oxy into the airacon unit ??

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I agree that the tank in the photo looks like oxy, but there's no acetylene tank to be seen.

 

Keep in mind that the indoor unit also exploded. That is what makes me suspect that a gas other than refrigerant was added to the system. I really don't know if oxy would explode in that case. maybe so.

 

 

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17 hours ago, mahjongguy said:

It appears that both the indoor and outdoor units exploded. Given that the refrigerant is not flammable, can anyone suggest how such a thing could happen?

Freon can combust when mixed with ambient air at low pressure.

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"The two mechanics were fixing the air conditioner when the blast took place."

Be nice if we could know the name of the firm they were working for, if any. Defamation laws prohibit that no doubt.

They done fixed them units real gud.... just don't have same bunch install the new air con I would think

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5 hours ago, sirmud63 said:

that looks like an oxygen bottle on the ground near the wall. 

oxy mixed with oil ,burns and could cause an explosion easily .

but why in gods name would they put oxy into the airacon unit ??

Save money??

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Pressure vessels including air condition equipment  can and do explode without a fire. This is why there is a specific coverage called Boiler & Machinery or Accident to an Object or  Equipment Breakdown (depending upon the jurisdiction). Explosion without fire is not insured under a standard fire policy. One needs the  additional coverage either  as an extension or as a separate policy. 

 

The   compressor  may  have malfunctioned.

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Refrigeration gases expand rapidly with a small change in temperature that's the key attribute with them all from ammonia to freon. If the gas was trapped in a pipe or the hermetically  sealed compressor and they  heated it to try repair a leak it would explode. Very important to evacuate the gas and charge with nitrogen before welding. 

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2 hours ago, tonywillo said:

Refrigeration gases expand rapidly with a small change in temperature that's the key attribute with them all from ammonia to freon. If the gas was trapped in a pipe or the hermetically  sealed compressor and they  heated it to try repair a leak it would explode. Very important to evacuate the gas and charge with nitrogen before welding. 

Bingo. ?

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