DE1812511A1 - Method and device for removing compressor lubricant from a lubricant-refrigerant mixture from flooded evaporators and returning the lubricant to the compressor - Google Patents

Description

11/27/190S

- !. IG. ERi H -JAGUSAT 27 <· 2 / .ν

GiLLiCTiIAiSE 20

Borsig Society

with limited liability

1000 Berlin 27

VeriV ^ iren ur .-- L'iiiriclitung cur removal, from Xora ^ ressorocl'ii ,, i.erv.iittel au · :; a L-cluuieriDittel-refrigerant mixture from ^v i "^; over: flnteten Te ::. ⁱ danpfem mic.! -

The invention relates to a Terfa ^ iren unü a i; inricritu: i> to carry out ^f 3es VerffUireiiG. ^ Ur Iiritfeynuiig von Kos j __- r ers κ ο: c - '. I ohsier aiit t el from a S cliaiermi 11 e 1- KJilt e-! Aittel-iior.ii.'joL · by flooded on evaporators and only continuous- IiG; .- eji U.1IJ automatic! .Jiciifülirun-; this lubricant to the compressor of a refrigeration plant

With such? 'Iiiriohttingen it is necessary that the continuously from the Gesöhralex ^ th compressor into the evaporator ge-1 aη, - οΠΑ ".; .jOiimiermittel» dar; bei -jeohen {3lcaiöHi; itiilun,; jen in Vero ^ i- iofor Uiiv / ei; Jerlich lead to failure of gunsen Anluve rough ':, - * · / € ^_-it;.: en freed end of refrigerant - v / i ed he eggs

ufeH Komprerjrjor'j zu «ufüiii: enj so dai'.l

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the level of the compressor boiling agent in its saramal space is always constant - xma, in addition, a once set amount of boiling agent is maintained in the coolant.

It is known), zui ¹ fulfill these Erfordernisse- ^which: medium-refrigerant Geraisüh in the suction line of Eompressdrs feed discharged from the flooded "evaporators' liquid ScttmieT- ,, largely iri the refrigerant component to a downstream, preferably heated with liquid refrigerant heat exchanger. "which is a l ^l eil of the suction line, auszudampfen and substantially freed so by the refrigerant lubricant from the Eältetaittel-suction vapor stream ävireh the Saiigleitung au an upstream the compressor separator au transport, are separated from each other in the -Kältemitteldampf and liquid lubricant" ( German Äuslegeschrift Hr. 1 22? 036) *

To get rid of the liquid. Lubricant ^ refrigerant G-emic can zn evaporate, "is also known to run it this ffemisch sum evaporation of refrigerant component. By a special V / ärmeübertr ^ ger su" the heating "this heat unearned with liquid (German Patent Mr * 829 169 / or vapor (German Patent Mr "854 8b> 4) refrigerant or other liquid ( 'German Patent inr * 1 0 ^ 7621} or vaporous. (ATL ¹ Sführungen of Anmelaers New York Convention of Konfcurrenauriternehmeü) heat tr agem or electrically (after completing the

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iinmelrd'e- ^ s and from competing companies) takes place, and the lubricant, which has largely been freed from the "holding agent", is either transported together with the resulting refrigerant vapor through the suction line of the compressor from the refrigerant suction steam flow to the compressor (Detitsche patent specification IJr. 829 169) or the liquid lubricant and the refrigerant vapor are separated, and the return of the lubricant to the compressor takes place via a special line (German patents ITr. 834- S54 »930 392 and 1 ObI 621) of all known designs, however, special measures must be taken to ensure that no liquid refrigerant gets into the lubricant circuit of the compressor together with the lubricant / arm transfer surfaces with sufficient heat supply for all operating states at the same time ht be. If the amount of heat available to evaporate the refrigerant from the liquid lubricant-refrigerant mixture depends on the current cooling capacity of the refrigeration system - e.g. when heated by liquid refrigerant from the condenser - it is necessary to control the internal flow of the lubricant-refrigerant mixture in this way that the heat exchanger with the lubricant-refrigerant mixture is only supplied with as much liquid refrigerant as can be evaporated according to the supply of heat. Frequently

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this control takes place automatically, whereby either the superheating temperature of the refrigerant suction vapor or the lubricant - measured downstream of the "vapor transfer" - is used as the control variable Operating conditions of the compressor, the amount of lubricant supplied to it is the same as that exiting the compressor through the pressure gas line. As a result, fluctuations in the lubricant content in the refrigerant charge of the evaporator and undesired changes in the lubricant charge in the compressor occur, which may require additional lubricant storage tanks to prevent this When the lubricant is returned through the suction line, special measures - such as compliance with certain cross-sections, the subdivision of the suction line into several parallel lines, etc. - are necessary in order to ensure safe transport of the lubricant for all occurring To ensure steam fluids. Particular problems arise when the lubricant is transported through a common suction line and then has to spread over several compressors. In this package there are additional connections and compensating lines between the lubricant circuits of the compressors. as well as devices that prevent unwanted shifting of the screw fillings ^{with Stillstanc 1 single compressors.} -. ' - '..-

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Ijie _: ■ _ ·: £ inäun ^ should mend aas. You iie ^ t the _.ui '£; ^o - ~ be i; u _ö ru _: ue, lc ".ivanlz \ m ^ en in the dc-iinierlitte! filling aes od.ei · äe: ·? Io ^ i ^ ressoren, a mii.leiüliuii ^ i _o e dciiaieruittelve: .- sor ₀ uiij. oeiirerer jrouroressoi-sii ei-ier L ^ lteenla ^ e un: ^ c ^ v ^ nkua ^ eii oee üciiDieriuitteic ^ itcils iu Jer lältenittel-ίτ: 11ΐΓα _ο · äes \ lverflutetevi avoid .

Jiece ./.-.-uf^abe v. Is erriiictungsjc ^ ij-ß ö ^ solved by da5 äac ü-ci'ii ^ ierüiittel-Kältenittel-iTemiscii -λ: ι an upper melireren geei ^ iieteu υ te Ilen des Xältenitt-el-circuit s in an sioh "be-Irr.nnter '.ve-igg -eritnomraen rirö that theseia bclimieraittel-Kälte'.iittel-G-Grnispii' ./arme from the v / arnea bdimiermittel from aem ocjiBierrnittel- Ereislaui 'of the compressor and supplied by the Eältenmittel through .'-. Usdamp ^ en veit ^ ehenci "freed Sciimiernittel de": n bciimierraittel-I-lreislauf v. ^R ieaer. TJm a special, rod Iliscnuii ^ zv / isohen dem . viarraen ochnierraittel and aen ochmiermittel refrigerant Geiiiisch never reach ^p -erx to l-iöriaen is a nz.o'a: · other .. "- usbildun ^ i; riindun-.5 v / arrae 3c.. } a ^r nierr-iittel from a 3 collection room of the Cfiraierrflittel-Iireisl ^ ufs with a pipe a, iclnnierrmittelpmnpe through. üie jtunpdruckleitun ^; and an alDzv / own supply system is conveyed and comes into contact with the "Jcrrriiierrriittel-Ealteraittel-Much" in an oil device.

In order to achieve a faster v.ärweüberganßes hi / ite. · der liiachvorric / itunj; a - 'ienelvorrichtunu available ..

"i ;; i a rclbsttäti ^ o;. tax un ^ der; ) en ^ enrjtrovaß von, ', ohi-iieririittel-Fältemittel-Cremisch be've ckrstelli ^ en au can,

BAl 000826/0837

For the automatic maintenance of the lubricant level it is in the samrael space of the corapressor lubricant e.g. ' a direct float valve is provided. ■ "'" ■' ■

In order to keep the center stand up even during operation An airi float valve is a device for adjusting the height of the lubricant level in the collecting area of the compressor lubricant.

Un the supply of lubricant-ICrefrigerant-C-eniiscli

for the device according to the invention when stopping the compressor prevent and release when starting the same. to be able to, is relocated to the float valve and A pipe leading to the lubricant-refrigerant mixture manually and automatically operated shut-off valve installed .

It is necessary to measure the heat content of the lubricant To increase the lubricant circuit also during operation, there are elements of a standstill heating in the collecting space of the compressor lubricant.

A schematic representation of the device according to the invention is shown as an exemplary embodiment in the drawing and is described in more detail below.

The collecting chamber 1 of the lubricant circuit of the compressor 2 is provided with a housing “j> connected, which takes up the essential parts of the device according to the invention, never

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Pipeline 4- with the manually or automatically operated shut-off valve b is used for the supply of the liquid lubricant-refrigerant mixture coming from the evaporator, which passes through the float valve 6 into the mixing device 7 and there with the warm lubricant from the οcliraiermitte! - coincides circuit of the compressor 2. the v / poor lubricant is sucked from the. lubricant pump 5 from the Sammelrau'n 1 \ * ± ra conveyed into the pump pressure line 9 and passes through the branching feed line 10 ir the Hisölvorrichtung 7, in which mixing takes place with the SejiTüieruittel-KHltanten-G-emic.Jac · new Gemiscli flows into the Eieselvorric'itiir. ^ 11, in which a thin film of diesel is produced v. ^r irä. I-Iit 12 is marked a liquid Sclimierraittelstrora Yorriclitini _; j 15 on SchwimraVeiitil 6 is used to adjust the height ^; SV ^r isehen the housing 3 and the saune 1- space 1 ensures a rapid compensation in both ces oc'raiermittelstandes Iläumen, I-15 Iit is the Gtillstanäebeizung with 16 a · L'c; iniermittelzuführungsieitr: a _o to the Sciimierstellen of the compressor. Sum compressor 2 ^ eliörenae parts are 'αer crank mechanism 17, the piston. 1ö, the compressor cylinder 19j, the suction chamber 20, the pressure chamber 21, the suction work valve 22, the pressure work valve 25, the pressure line 24 and "the opening 2'-j between the collecting chamber 1 and the

TlI '-Τ-ΌΤΙΤΊ Oil

Hach the Linr; ehalt ea the Korapressorrj 2 v / i ca the shut-off valve

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valve 5 between the evaporator and the float valve 6 In the oil line 4 for the supply of the uchraiermittel-hardening agent mixture opened. The flowing through the supply line 10 [Eeilstrora des from the lubricant pump 3 of the compressor 2 from the collecting chamber 1 pumped lubricant reaches the mixing device 7 and via the liiese! device 11 into the housing 3 and from there through the Connection opening H back into the collecting space 1. This Circuit is complete as long as the compressor 2 and thus the lubricant pump 6 are in operation »vJeiin the liiveau dec Lubricant in the Banunelraum 1 sinks because part of the Lubricant through the pressure line 24 of the compressor 2 leaked and via the refrigerant circuit i :: i the evaporator has reached, the float valve 6 opens, and it the lubricant-refrigerant mixture flows out of the "evaporator through the pipeline 4j the float valve 5 into the mixing device 7, in which it is mixed with the warm lubricant entering through the supply line 10. After exiting the mixing device 7, the new weight flows into the Hiese! device 11, where a thin falling film is formed. As a result of the heat supplied with the warm lubricant entering through the supply line 10, steams in the pebble device 11 is the refrigerant fraction of the "pipeline 4 supplied part Schraierraittel refrigerant mixture the end. The resulting refrigerant vapor flows through the connection opening 14 into the collecting space 1 and through the

öxxmmg 2 ^ in the ^ augrauin 20 ögs compressor 2. The circulating part of the lubricant-refrigerant-cream mixture fed through the pipe 4 comes together with the lubricant conveyed through the supply line 10 through the housing 3 and the connection opening 14 into the junk room 1 and eroetat there the leaked through the pressure line 24 of the compressor 2 lubricant. When switching off the compressor 2 v. ^r irci dan. shut-off valve 5 by hand or autoaatiscli closed, l) cLiu ±% is auoii ctie facility for the removal of IZompressorijc "'iVjiarmi" vtel- _: a; \ is-_ deal ochmerLiittel-Kältiixtel-Gemiseli out of operation. > -: it Iliife de- :? o?; riolitung 13 am ocJivviuimerveutil 6 : z \ vr Köüeiiverytelluiiij -des ijchmiermittelstanaeß in oammelraiim 1 and in Crehüuse 5 can o.er opening and the ochlieiBbeginn eggs; Cchv / imraerventils 6 v / uring aes operation c-es compressor 2 set v / ground so that the level of the .jchmieraittels Im Sa.7nmelrauv.-i 1; λιΓ the desired height is kept. rur auto- :: 2 ^r; .ti "üh.en II-tenerva ^ Ό of the shutoff valve can dieaes" .1s elektriscrx 0 ^H he vorsugs- ^{T T} ei: OK - ^ 'he pneumatically betlitigterj shut-off valve O.'.. Iri njoraulinches ", piston valve in dor"., Designed cciti, aai "; niesec is only open when the compressor ii?, Drive iiit. J> ^r .-. R> hvuraulisch, actuated shut-off valve ^l j is then"'>' ^r eci: nü.i.; igerv / ei ;-) o ciurcn the pressure aes fcchuiermittelreir ^ run äeu Eor-.presrjor ;; 2 opened una, v / enn this pressure after 'Abstellen cie-ü /!' Onprer-juorG 2 verschv / iriuet, aurcii i'eaerkr'ift ge: jchloB. '; Er_.

_rf ; ie with üor. »u-fir carry orziolten vorxeilfj order iücbe-

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special in that the inventive device because of the compact and cost-saving design can be attached to each individual compressor in a refrigeration system. if the pipe line en 4 of all existing lubricant return ■■ -. . guide devices with all points of the refrigerant circuit x * refrigeration systems are connected to which Lubricant can accumulate, everyone is assured The compressor is just getting the lubricant back in, which he lost through his pressure line. So be any difficulties related to communication between the lubricant circuits of the individual compress ■ sores avoided. · "■.

The required to evaporate the refrigerant heat is the lubricant circuit of the compressor taken (Re ibungsVerlustleistung) and is thus independent of the ■ augenblicklicheil cooling capacity of the refrigeration system. In special cases, the standstill heating 15, which is already present in compressors for refrigerants which are very soluble in refrigerants, can serve as an additional heat source. This results in considerable parts of the goal compared to the use of heat exchangers, the performance of which when heated with refrigerant depends on the current cooling capacity of the refrigeration system and there is a risk of freezing if they are heated with water The heat transfer medium used to heat the heat exchanger is not required.

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· "";! '· "-"' '' f "■! '! ·! E (IiJISH ■! 1 · 1! <|!» Ίΐ i | i ~ li

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wall is omitted, since the Värmemeiige supplied with the lubricant from the c.em bchmermitte! circuit of the compressor 2 to evaporate the refrigerant portion from the lubricant / refrigerant mixture is a multiple de :? ! is required, and since the evaporation of the refrigerant component in veseirtlichen from the se from the Hie device generated dimneii J ¹ IIIs sigkeitsfilm occurs is: achieved with certainty that the eng compressor 2 v'iedex * supplied Schiniermittel Light more liäi · - tea means contains as the equilibrium / ichtssustaiic corresponds. The avoidance of solid heat transfer surfaces makes the heat transfer process thermodynamically favorable and enables low manufacturing costs and small dimensions.

jilin another v / es public advantage is da3 the control of the amount of Sehmiermittel returned to the compressor 2 takes place in such a way that see in all operating states the refrigeration system an equilibrium from the Compressor 2 through its pressure line 2 & exiting and the through the lubricant return device to the compressor 2 returned lubricant quantity at a constant 'free sets selectable lubricant content in the refrigerant. .

The device according to the invention is suitable for all refrigerants and lubricants can be used, regardless of their mutual relationship Solution behavior.

A lubricant cooler, which may be required, can be used because of the heat dissipation from the. Lubricant through the evaporation of the ^r-j Kaltenlttelanteile chmiernittel refrigerant Geinisches relieved or Ooj-'Ir replaced v / ground.

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BAB

Claims (1)

PATENT ADVOCATE -j ₂ DlPl-l: iü. FR! H JAGUSAT
icon l ^: .:; -: li: -i 27 EOELLSSTRAbSE 20 27.11.1966 2742/6 Claims 1. A method for removing compressor lubricant from a mixture of pain reliever and refrigerant from flooded evaporators and for continuous unr) self-tütigen itüokführung of this in the refrigerant lubricant to the compressor of a refrigeration system, since Ö. Urchge indicates that the Gciimierraittel-.Kältenittel δ represent mixture of one or more suitable there Zültemittel cycle s in a "known '." else taken _wi:; CtB this SchriiieriPittel-Zälternittel-O-eraisoh j'ärne of e'er · ^ rare Schnierrflittel from the lubricant circuit dec Moupressors (2) and the Sehmiermittel largely "freed from the refrigerant by evaporation is fed back into the lubricant circuit. 2 _P device for injecting the method according to claim 1, characterized in that the warm lubricant from a collecting space (1) of the iohmiernittel circuit with the aid of a lubricant pump (o) through the pump pressure line (9) and a branching inlet? guide s line (10) is conveyed and in an ϊ · Ιΐ ε oil device (7) comes into direct contact with the lubricant-refrigerant mixture ₀ 0098 26 AO 8.3 7 3. ^ inriclitung according to claim 2, d a d. u r c la g e mark h η e t, aaS behind öer kiocnvorrichtiing (7) an oil device (11) has to be renewed. 4. Establishment according to ^ nsprucli 2 and 3 »thereby g e: · ■: e η η ε e i c h ii e t that for the automatic Σοιι-staiiti? -9.1tuiio of the rJanmiermittelstanäes in the Paainel room (1) . ". 13. A. Äiraktvirkenues oGliwimmerveiixil (o) is presented. -j. Binriohtun. ^ - according to claim ί-, thereby ge ---. ke η η ζ e.; l ο h η et, d & .ß a device (13) on οcl-wiamerventil: (ο) for adjusting the height of the iclraierraitteist and it is attached in Sasraelrauui (1). 6. Device according to claim 2 to 5, el a d u r c h 2 eke η η ζ eic Ii η et that l · "the ζ-ι · ι"':!"■" always relocated valve (6) unö Söiaa ± erv'i ± ± i, el .-} ie, l ± eri <± -t-tel-Qem ± Qoh leading _-. O} ji'line (4) a manually and automatically operated shut-off valve (b) is installed. 7. Uiri-'ichtung after ^ aisxiruch 6, ·] a d u r c h g e - ke η ο. ζ eic .π η et, qi, 3 aa ^ shut-off valve (5) is electrical Rt. 3. device according to claim 6, d fi (lurch gek e η η:; cic η £ iet, α -M du ;; i ^ boperrventil (i ^) pneumatics et actuated .vird. ^c j. ojinrieiitung according to Aiiopruch 6, α a ύ urc Ii ge; ί e- η '". ·. tf ei υ h η e ΐ, f- ^; aiJ a.afj Abrjporrvontil (^) hyur; -u liüori. humbled v / irü .. - 14 - 00982 6/08 3 7 1Oj iiaricliti ^ ii ^; as.ch request 9 ο a α urc Ίι " ' g e k e r. ·. η ζ e i c h η e τ that the hydraulically operated Shut-off valve (ί?), For example, voq pressure of the compressor-air-pressure circuit open and through. Spring force closed will. 11. device according to one of claims 2 to 10, d a d u r c 4 g e k e η η ζ e i c h η e t that in the Saninelräum (1) elements of a "standstill heating (15) are located. . -. 12. Device according to .- '. Nspruch 2 to 11, thereby marked that the facility sur distance of compressor lubricant from the lubricant-refrigerant mixture and this for the automatic return Lubricant and the! Compressor-Agyregat a .. structural! Unit forms. ■ 13 · ijinriclipung according to one of claims 2 to 12, thereby g e k e η η ζ e i c h η e t, daä the facility to remove the compressor lubricant from the lubricant-refrigerant-mixture and for the automatic return of this lubricant in place of a lubricant filter occurs or such a cooler of smaller dimensions 0 0 9.8 2 $ 7.0 8.3.71,, " 'ORKSl WAU