Talk:Scroll compressor/Archive 1

Archive 1

Initial comment

I stumbled across this article, noticed the cleanup flag and huge blocks of text, and decided to try to fix it up a bit. There were no sections, so I tried to break it down into sections, but it probably needs some more work. (Especially as the only think I know about Scroll Compressors is what I just read.) (The formatting was very unusual while editing.) Fogster 17:52, 16 May 2007 (UTC)

Volkswagen G-lader

I corrected myself here (see page history). VW sold a supercharged version of the Corrado (Not the Scirocco as I originally remembered) that used a scroll supercharger they called a "G-Lader" (G-Vator in the states).

--Bagheera 18:47, 26 July 2007 (UTC)

Compressed Liquids?

Article says "uses two interleaved spiral-like vanes to pump or compress fluids such as liquids and gases." I thought liquids could not be compressed, and that the scroll compressor can only be used to pump gasses for this reason (the volume of the pockets of gasses becomes smaller as it moves through the spiral).

69.155.76.41 (talk) 05:31, 13 January 2008 (UTC)

What does the design section mean?

In the design section, it says that the scroll compressor can be involute, archimedean spiral, or hybrid. By involute, does it mean that it can take any form that is an involute of another shape? Actually, an archcimedian spiral already is an involute; it is the involute of a circle. If the scroll compressor can take other involute forms, or any other forms at all (can it?) than the archimedian spiral, some examples of them should be given. I also think the use of the word hybrid should be motivated. --Kri (talk) 20:55, 30 December 2008 (UTC)

Sorry for my last comment. I realized that an archimedian spiral was not at all the same thing as the involute of a circle, they just resemble each other. But now when I know they are not the same shape, is the shape in the animated image an archimedian spiral or the involute of a circle? --Kri (talk) 02:36, 7 January 2009 (UTC)

Compressing milk?

As the name suggests, the scroll compressor compresses things. But can it compress milk? One source says it is used to cool milk. If you look at the video http://www.youtube.com/watch?v=f_6xolDoqs0, you can clearly see how the area decreases as it gets closer to the middle, hence the volume decreases, but milk is an incompressible liquid. Or is it constructed in any way that it gets thicker closer to the middle? --Kri (talk) 20:37, 30 March 2009 (UTC)

If you check the linked source, it says "the compressor reduces, pumps and cycles refrigerant through the cooling system. The scroll compressor features dual spinning scrolls that compress and move refrigerant more efficiently and reliably than traditional compressors." It doesn't come into contact with the milk. Salmanazar (talk) 21:06, 30 March 2009 (UTC)

Merge Proposal

The following is a closed discussion of the merge. Please do not modify it. Subsequent comments should be made in a new section on the talk page. No further edits should be made to this section.

Merger discussion closed for lack of activity for a year.
-- Yellowdesk (talk) 14:22, 2 January 2010 (UTC)

I propose merging Scroll-type supercharger here. Most of the information on that article is redundant, and I don't believe there is much potential for it to expand as a separate topic. I believe this to be a fairly obvious merge on pages that doen't appear to be under terribly active development, so without opposing input, I'll do the merge in just a couple days. -Verdatum (talk) 03:18, 24 July 2008 (UTC)

The scroll compressor and supercharger are two separate items, and should remain split. The 'supercharger' article has potential for expansion if only for explanation of why the two are different topics. —Preceding unsigned comment added by 65.84.223.130 (talk) 13:36, 27 October 2008 (UTC)

The above discussion is preserved as an archive of the proposal. Please do not modify it. Subsequent comments should be made in a new section on this talk page. No further edits should be made to this section.

Axial compliance

What's this term mean? (And what's radial compliance?) Googling it brought up lots of pages about scroll pumps, but no definition. 81.131.62.171 (talk) 02:16, 5 April 2010 (UTC)

Axial compliance means along the axis. In the animated gif of the oscillating scroll axial would mean out of, or into the screen. A non scroll compressor example is a thrust bearing. https://en.wikipedia.org/wiki/Thrust_bearing. A thrust bearing is an axial bearing, it is for bearing loads in the axial direction. A normal caged ball bearing is for bearing loads in the radial direction, and a Timpkin https://en.wikipedia.org/wiki/Tapered_roller_bearing bears loads in both the axial and radial directions.

If the scrolls fit perfectly together at room temperatures, they would seize up operating due to the rather considerable thermal gradient between the low pressure (cold) side and the high pressure (Hot) side, so some compliance is needed, the compressor oil takes up some of the radial compliance and the seals inserted into the scroll vanes takes up the axial play.

Suction Valve

What is to give the impression scroll compressors do not use suction valves? Suction pressure regulation is still there for scroll compressors, I can safely say I'm familiar enough with refrigeration systems to know that. Thermoking TS units, for example, a good number mount a mechanical 'throttling valve' directly on the compressor suction inlet. Thanks for any clarification here, maybe I'm severely confused but the article seemed pretty explicit about the lack. 184.153.192.80 (talk) 02:45, 17 February 2011 (UTC)

Neutrality dispute

Looks like the compressed air battery technology is emphasized in this article and is given biased means of grabbing attention. This issue should be confirmed (and fixed) or disregarded. Edit: even though it's really minor, it's inappropriate that some bit of text regarding this is in bold when it shouldn't. — Preceding unsigned comment added by 74.58.202.104 (talk) 17:29, 29 December 2010 (UTC)

All of Johnhutch's edits should be reverted as most of them are advert for Pnu Power (see the speedy deletion for Compressed air battery). —Preceding unsigned comment added by 194.185.40.11 (talk) 13:20, 11 February 2011 (UTC)

I removed most of Johnhutch's edits. I left in the Compressed air battery see also link, but my gut tells me that link should also go. The only reason I left it in is compressed air battery links here, but it is not a link that will inform readers about scroll expanders. If there's no support to keep the link, then somebody should remove it. Glrx (talk) 18:25, 3 June 2011 (UTC)

Digital Scroll Compressor Technology

A recently created article, Digital Scroll Compressor Technology, looks like a good candidate for merging into this article. I don't understand the issues well enough to feel confident that I can do the merge myself, however. Please discuss, and if someone with a better grounding in this field feels comfortable taking this on, please be bold and take care of it. :-) —Tim Pierce (talk) 16:46, 26 October 2010 (UTC)

Very much agreed. That article was still orphaned and lacked citations after more than a year. These are the general references, which I didn't want to slap into the main article without connection:

• "Development and testing of a multi-type air conditioner without using AC inverters". Shih-Cheng Hu *, Rong-Hwa Yang. NTUT.edu.tw
• "Experimental study of performance of digital variable multiple air conditioning system under part load conditions". Dongliang Zhang, Xu Zhang, Jun Liu. The College of Mechanical Engineering, Tongji University, Shanghai 200092, China
• The Greening of IT: How Companies Can Make a Difference for the Environment. John Lamb. [IBM Press, 2009. p. 141. ISBN: 0137150830.
• Basic Refrigeration and Air Conditioning Section: Scroll Compressor. Ananthanarayanan, McGraw-Hill Education. 2005. p. 184.

ENeville (talk) 00:04, 3 April 2012 (UTC)

As best I can tell, Digital Scroll is a trademark of Emerson for one "partial loading" strategies discussed in the section prior to "digital scroll". In addition to treating the trademark as a generic term, the section also has copyright violations such as "The beauty of this technology is its inherent simplicity," directly from [1], which would be objectionable as inappropriate advertising hype even if they weren't also copyright violations. I don't have time to pick through the whole section and find what is good and what is not; I'm tempted to delete the whole section, but for now I'm just going to do a quick and dirty mild trimming job; much more is needed. Ccrrccrr (talk) 14:49, 7 April 2012 (UTC)

I just went through trying to trim out the copyright violation but I found the whole thing was just sentences copied from the Emerson web site. That's blatent violation of lots of wikipedia policies. So I deleted it all and left only one sentence with a reference to that web site. Even that is questionable--it could be called link spam.Ccrrccrr (talk) 14:59, 7 April 2012 (UTC)