compressor question

[edsky]

thanks sir audio_hunter actually iisa lang po yun a\c tech na nagma-maintain ng car a\c ko...talagang nagtaka lang ako ngayun dahil nag bago yun lamig nya, compare before...so i also assumed na di rin fake yun gamit nya na refrigerant...pwede po sigurong kulang..yun mga setting's lang po na mention nyo ang di ko alam, as in kamote po ako sa a\c , kaya those parameter inputs of yours are so valuable for me...siguro this coming weekend puntahan ko, para matanung ko sa kanya yun mga setting na nabanggit nyo..salamat po ulit boss

[busdriver]

edsky,
if I may give some inputs:
First, di dapat mag moist ang compressor. Moisture occurs when a certain area is colder than dew point of the air. My suspect, freon is leaking out of the compressor. Maybe the seal is worn out or loose. Yun lang naiisip ko na malamig na pwedeng mag-cause ng moisture ng compressor.
Second, "...dapat daw ang nagpapawis lang ay yun linya/tubo papasok ng unit & not the compressor itself." - This is CORRECT.
Lastly, just a hunch, kaya humina ang aircon sa paglamig its because freon has leaked.
Goodluck on the fix.

[audio_hunter]

New a/c compressor does not perspire,but since its a workhorse and responsible in removing hot air inside your car cabin, after years of faithful service soon it will perspire/moist. An indication to its master(car owner) to save enough budget for its replacement. Refrigerant leak will give you cold cabin for days or a week, but suddenly your a/c will not work do to low refrigerant. Shaft seal refrigerant leak is the worst leak of all, most of the refrigerant will be lost in 1 day.

I am no car a/c expert, I just based my suggestions through my personal experience w/ my car /ac and through hundreds of forum pages that I've read from the internet.

[busdriver]

....perspire,but since its a workhorse and responsible in removing hot air inside your car cabin, after years of faithful service soon it will perspire/moist. ...

Then why does it moist then? Moisture happens when there's an area whose temperature is below the dew point temp of the air, thus the moisture. Then the compressor is cold while it shouldn't be cold. Why? The compressor is merely a pump. Its a to pump the freon to a compressed state & heat it up. Then as it is heated when compressed the heat is rejected thru the condenser (in front of the radiator), then expanded again for evaporation (at the cooling coils/eveaporator).

....Shaft seal refrigerant leak is the worst leak of all, most of the refrigerant will be lost in 1 day.

Do you know the degree of leak for you to know that the freon can be gone in 1 day?

....I am no car a/c expert, I just based my suggestions through my personal experience w/ my car /ac and through hundreds of forum pages that I've read from the internet.

I'm no expert either. I just happen to have experience working in one of the biggest airconditioning manufacturers in the world with a BS degree in Engineering.

Cheers!

[audio_hunter]

Then why does it moist then? Moisture happens when there's an area whose temperature is below the dew point temp of the air, thus the moisture. Then the compressor is cold while it shouldn't be cold. Why? The compressor is merely a pump. Its a to pump the freon to a compressed state & heat it up. Then as it is heated when compressed the heat is rejected thru the condenser (in front of the radiator), then expanded again for evaporation (at the cooling coils/eveaporator).


Do you know the degree of leak for you to know that the freon can be gone in 1 day?


I'm no expert either. I just happen to have experience working in one of the biggest airconditioning manufacturers in the world with a BS degree in Engineering.

Cheers!

Well sir, not to offend your BS Engineering Degree (for whatever it is) meaning you're not an engineer ? If you are indeed an engineer you will not hesitate to call yourself Engineer or simply you could say I am an Engineer. There no such thing as a Bachelor of Science and not a degree holder? (BS na nga eh tapos Degree pa? me ganun?) And working in one of the biggest air conditioning manufacturer ? Afraid to divulge your company for it may seems that it is not the biggest manufacturer? I bet you are just an employee. hmmm tsk tsk tsk

Though what you've said about the moisture were correct (since you may have read it also from the internet (google maybe)) I agree with you.

The reason why I mentioned that shaft seal leak is the worst simply because, that seal act like a pressure valve. It can only hold certain amount of pressure (300 psi in some compressor model) before it gave in. Once open it will let huge amount of refrigerant out of the cooling system. Pinhole at the shaft seal cannot hold even 100 psi pressure.

May I ask you a question sir, do you know what will happen to the "freon" if it will leak somewhere in the cooling system ? will that part be cold as if the "freon" is leaking thru it? i'll tell you sir, it will not. what you can see is just a stain of leaked freon.

"The compressor is merely a pump. Its a to pump the freon to a compressed state & heat it up." --- pump indeed sir.. the relationship of compressed gas(pressure) to temperature is "directly proportional"... to enlighten you sir.... as the pressure increases , temperature also increases. converting gaseous state refrigerant back into liquid state. and at lower pressure goes lower temperature; liquid state into gaseous state. that's why discharge side/hose of the compressor is hot to touch and sir heat is not rejected through a/c condenser in front of your car and radiator but it merely lowers down the pressure as for the temperature of liquefied refrigerant

"then expanded again for evaporation (at the cooling coils/eveaporator). "--- correction sir it is not "expanded again for evaporation" it is expanded as it passes through TXV or an orifice that regulates the refrigerant flow into the evaporator.

We're both members of this forum/group since I believed, we both want to help others (not to mislead them) and we're both eager to explore and learn new things that we merely knew.

Cheers also to you sir..

[den1106]

"The compressor is merely a pump. Its a to pump the freon to a compressed state & heat it up." --- pump indeed sir.. the relationship of compressed gas(pressure) to temperature is "directly proportional"... to enlighten you sir.... as the pressure increases , temperature also increases. converting gaseous state refrigerant back into liquid state. and at lower pressure goes lower temperature; liquid state into gaseous state. that's why discharge side/hose of the compressor is hot to touch and[SIZE="6"] sir heat is not rejected through a/c condenser in front of your car and radiator but it merely lowers down the pressure as for the temperature of liquefied [/SIZE]refrigerant



We're both members of this forum/group since I believed, we both want to help others ([SIZE="5"]not to mislead them[/SIZE]) and we're both eager to explore and learn new things that we merely knew.

Cheers also to you sir..

Sir baka naman po puwedeng malaman yung source ng inyong statement sa itaas. Maraming salamat po.

[gorionikoy]

mga sir matagal nanaming naging karanasan yan compressor na nagmomoist..una ay dahilan ng nagpacleaning at nasobrahan ng langis.yun lang at wala ng iba..flushing lang ang kailangan dyan at palit ng valve at drier hindi dahilan ang kakulangan sa freon..mga sir pwede ko hong idemo kay sir.. pag nagmomoist pa rinay hindi ko sya pababayaran..

[phezthie]

Sir baka naman po puwedeng malaman yung source ng inyong statement sa itaas. Maraming salamat po.

+1... http://www.clickcat.com/examples/6.pdf

[busdriver]

Well sir, not to offend your BS Engineering Degree (for whatever it is) ....hmmm tsk tsk tsk

I dont have to flaunt my qualifications/company... here's my PRC Mechanical Engineering License 0048147-98. You can verify it at PRC & I'll send you my name thru PM to confirm.

Though what you've said about the moisture were correct (since you may have read it also from the internet (google maybe)) I agree with you.

Thanks. But I dont need Google to explain this.

...shaft seal leak is the worst simply because, ...Pinhole at the shaft seal cannot hold even 100 psi pressure.

[SIZE=4]It can be smaller than a pinhole or a misalinged seal or loose nut?[/SIZE]

May I ask you a question sir, do you know what will happen to the "freon" if it will leak somewhere in the cooling system ? will that part be cold as if the "freon" is leaking thru it? i'll tell you sir, it will not. what you can see is just a stain of leaked freon.

[SIZE=4]YES it will be cold & there will be frosting at worst if the leak is too much! As to the stain. There's no stain, because its gas. How can it stain metal or rubber? Kaya nga technician use bubbles to detect a leak. Maybe the stain you are talking about is caused by the compressor oil if it gets out with the freon on certain cases.
Ganito, next time you have your car A/C cleaned, yung freon na pasisingawin thrust it to a metal surface, then touch it. Tell me kung malimig.
[/SIZE]
"....heat is not rejected through a/c condenser in front of your car and radiator but it merely lowers down the pressure as for the temperature of liquefied refrigerant

[SIZE=4]Are you 100% sure that the condenser infront of the car is just to "MERELY" lower the pressure/temperature & heat is not rejected? Are you willing to bet your car on that? I am!
Check the link pheztie posted.
ps: den1106 (above) wants to know your source on the condenser
I need not explain more.
The 2 guys above pheztie & den1106 are boggled by your explanation.

[/SIZE]"then expanded again for evaporation (at the cooling coils/eveaporator). "--- correction sir it is not "expanded again for evaporation" it is expanded as it passes through TXV or an orifice that regulates the refrigerant flow into the evaporator.

[SIZE=4]Pheztie above is kind enough to send us a (link)diagram. Look what comes after the condenser. Its the expansion valve. The orifice you are talking about is called expansion valve & leads to the evaporator.
[/SIZE]

We're both members of this forum/group since I believed, we both want to help others (not to mislead them) and we're both eager to explore and learn new things that we merely knew.

[SIZE=4]I dont mislead them. I comment when i know my stuff, modesty aside.
[/SIZE]
Cheers also to you sir..

[SIZE=4]Cheers & peace![/SIZE]

[gorionikoy]

I dont have to flaunt my qualifications/company... here's my PRC Mechanical Engineering License 0048147-98. You can verify it at PRC & I'll send you my name thru PM to confirm.


Thanks. But I dont need Google to explain this.



[SIZE=4]Cheers & peace![/SIZE]

sir hindi naman natin kailangan magaway dito..pero mas maganda siguro kung plain explaination lang sagutin natin..yung simpleng sagot lang..kaya nag moist ang compressor DAHIL ANG SYTEM AY MALANGIS KUNG HINDI QUALIFIED A/C TECH O HINDI PA BIHASA SA LINYA NYA ay kadalasang ganyan ang nagiging problema..sa expansion valve naman papaano magkakaroon ng evaporation sa loob kung restricted ang flow ng freon..ok peace men..boss gusto mo sample natin..kahit parts lang ang babayaran mu ala ng labor..