refrigerant reclaim unit

[Lc_shi]

Hi Sirs,
Our production needs a refrigerant reclaims machine. I want to assemble it by ourselves. I made a simple sketch ,pls experts give comment thanks


rgds
LC

[star882]

A .GIF version for those who fear macro viruses:

[Lc_shi]

thanks for your carefulness:）
hope that who're familiar with reclaim unit can tell me something.

rgds
LC

[Peter_1]

I should add some valves Lc so that after recovery you also can recover the condensor of the recovery unit itselves.

Can the 2nd schematic work you think?

[frank]

Are you going to use an oilless compressor?
How will you prevent recovered liquid from entering the compressor?

[Lc_shi]

No. I'm going to use ordinary compressor.

How will you prevent recovered liquid from entering the compressor?

Add an NRV for it,OK?

Peter, i accept your idea


rgds
LC

[Peter_1]

Frank, we use a normal Unithé Hermétique compressor for this.

We recover as much as possible liquid with the compressor of the refrigerant system itselves and do the rest with the small unit.

If a unit is still running and there's a service valve on the discharge side of the compressor - like with any semi-hermetic- then you can recover everything with the compressor itselves. And very fast, it's done in some minutes.

I should use a normal suction accumulator to prevent liquid slugging.

I never saw the inside of a recovery unit. Perhaps I can learn how they do it.
But, in my opinion, they cost a lot of money.

[dogma]

don't know a lot about recovery units mate, but I'd add an oil seperator, helps clear out the UV dye from r134a, and maybe intergrate a cold trap for those bigger jobs.


?

Off topic; in your schemetics, the symbols you use to represent components, is there a legend that someone could send me so I can better understand drawings. I have asked others, even a danfoss rep and he couldn't help.


Thankyou guys.

regards

[Peter_1]

In the ASHRAE books are these symbols defined.
UV dye??? Only used in car refrigeration as far as I know.

[frank]

Add an NRV for it,OK?

Hi lc_shi

A non return valve won't stop liquid from entering the compressor suction and destroying the pistons. As Peter said, you should fit a suction accumulator or make sure that you only recover vapour.

Before we started to use the Promax machines which have oilless compressors that can handle both liquid and vapour, we had a small unit that used solenoids to divert the liquid, bypassing the compressor, straight to the cylinder. I'm not sure how it used to sense the difference between liquid and vapour but it certainly does the job.

Both the oilless compressor units that we have, have been damaged in the field by the lads turning the selector switches too quick or by not being careful, but the old recovery unit which no one but me like to use just keeps purring along

http://www.tequipment.net/pdf/Promax/RG5410A.pdf

[old gas bottle]

the chaps have covered most of it for you,working from the inlet you need a wheel valve for control and isolation etc, then a acumalator with a powerfull heater tape arround it [boil liquid off and remove frost] then onto a solinoid controlled for ease by a stat[phial on the accumilator] to help stop slugging liquid -5/-10 ish, then into the compressor, i use a small manurope as they are better with liquid,out through a check valve to the condenser and to the recovery cylinder using another wheel valve for isolation, make sure you fit a LP/HP, set at 20inch vac and 250 psi approx and a pressure relise valve for saftey. its a tried and tested set up,good luck.

[old gas bottle]

couple of bits i forgot,braze a drian point in at the bottom of the accumilator [waste oil] and choose a good size condenser to stop the recovery cylinder getting hot, i,am sure theres more but thats the basics.

[Lc_shi]

Hi Frank,
I misunderstand what you means Yeah,It's right as peter said.

Both the oilless compressor units that we have, have been damaged in the field by the lads turning the selector switches too quick or by not being careful, but the old recovery unit which no one but me like to use just keeps purring along

It's not too bad.your're an environmentalist

regards
LC

[dogma]

In the ASHRAE books are these symbols defined.
UV dye??? Only used in car refrigeration as far as I know.

Hi Peter_1,

I'm an Aussie so the Ashrae books aren't that easy to come by, I have tried to find them.


We use UV134a in all refrigeration units my employers company manufactures. Thats around 10,000 units/yr.

I rekon if you ever come to aus, you'll find us in any night club just by flashing your UV lamp around. I'd have that much absorbed into my skin I'd glow

[frank]

Have a look here.

http://www.leonardo-cad.co.uk/autoca...cadlibrary.htm

Click on the "Typical Screenshot".

[dogma]

Have a look here.

http://www.leonardo-cad.co.uk/autoca...cadlibrary.htm

Click on the "Typical Screenshot".

Yes yes Frank,

This is what I am looking for, but I don't want to buy a program. I just want a legend so I can interpret drawings I go to tafe at end of mth for my 2nd block and was hoping to get something before then.

Thanks anyway guys

[frank]

I just want a legend so I can interpret drawings

Well, I thought all the legends you ever wanted were there for viewing.

Nobody said you had to BUY anything

[dogma]

I'll have another look then lol.

Yeah, you only get a sample of the darn things, and I can't find nothing about printing a full legend.