Silent Air Compressor update

I've found the main limitation of a small domestic fridge compressor, its starting device won't allow short cycling. it also lacks the start torque to start under high load.

Category:

Science & Technology

Tags:

• Silent
• Compressor
• Fridge
• Thesistor
• Start
• Device
• Failure
• Computer
• Case

[Plutoniuts]

You have a pallet load of compressors, now I want to be your buddy! .... Really am sorry about the previous comment. It is really a cool project, no pun intended, ok I let it slip. I grew up in an auto body shop and I'm sure my manners are proof. Really am proud to see people building usefull things and experimenting. Keep up the good work! As anyone knows a funeral can humble a man. Best regards to you and yours. -P

[Aussie50]

@Plutoniuts lol yer it may seem like a silly mistake but when you have enough new compressors to use them as door stops, its great fun trying different things, even if they don't work out.

I still have loads of compressors in the boxes today, but nothing to use them on :(. I got sick of making air compressors, although occasionally get a request for one.

[darkstari]

Hello! I've made my airbrush compressor with same exact Danfoss compressor. It's hooked to pressure switch that cuts power off when filled to 7bars. I've noticed this same problem with short cycling. Have you managed to overcome this thermostat starter issue? And what compressor would be ideal to use in this kind of device? Any brands to look for? Many thanks already.

Greetings from Finland

[Aussie50]

@darkstari you can use a starting cap and potential relay off a similar compressor, or a hard-start kit.

[Plutoniuts]

seriously ? you didnt know the duty cycle of the fridge compressor before you started that abortion of a project. what a waste of time and air ....duh

[Aussie50]

@Plutoniuts do you honestly think any hobby creation comes together perfectly the first time without a little R&D? get stuffed.

what else do you use pallet loads of surplus compressors for!

[Mytokondrion]

What size is the refrigerator compressor? (dimensions or power rating)

[BagFullOfBalls]

Danfoss refrigeration compressor?

Overheats because refrigeration compressors rely on cooling from the refrigerant returning on the suction line.

[skags2]

nice we project, what about installing a solenoid valve with a delay on start timer that vents to atmosphere for start up for 10 seconds or so as an unloading device, also may have to install a one way valve inline to your air tank , hope you have changed the oil in the compressor to something not hygroscopic as it will go acidic and eat out the windings, . and then there is the no cooling to the compressor the refrigerant would usually provide problem . neat we project keep up the good work

[queenofyeay]

@Aussie50 Similar problem with a compressor I built years ago. I bought a one way check valve in the line out from the compressor (mine screwed into the reservoir and T-ed off of the pressure line prior to the check valve from that I ran copper tubing to a normally open electric(ac) pressure valve and tied it into the the pressure switch. Reservoir reaches full pressure shuts down the compressor and dumps the pressure in the line. On next start up, there is no resistance.