Note: Descriptions are shown in the official language in which they were submitted.
~2~
~efrigerator comprisin~ a capaule ha~ing
a motcr compressor
Tha Ln~ention relates to a refrigexator comprising a capsulo
having a motor compresaor, wherein a suction oonneotor passing through
th~ oapsule wall teDmlnates at a spacing from the inlet orifice of a
suction conauit and a liquid separator apparatus is provided.
In a known refrigerator of this ~ind (G~-PS 20 66 374), the
suction connector which is led horizontally through the capsule wall
terminates in the plane of thiR wall. A tube comprises a horizontal
section coaxial with the suction connsctor, an aIc and a vertlcal
section. me inlet or~fice is flared and extends somewhat beyond the
vertical ~:ound~proofing wall. The other end of the tube passes through
the lower horizont~l sound-proorin~ wall. me horizontal Eection has
an oririce at the top con~tituting a direct connection to the sound-
proofin~ chamber. In this const~uctlonl gaseou~ refrigerant supplled
by uay of the suction connector is fed through tkeinlet orifice,
the ftr~t portion of the horizontal tube ~ection and the ori~ice in
thc tube wall into the ~uotion chamber, wherea~ droplets of liquid
oarrled along into the inlet orifice, i.a. oil or liquid refrigerant,
rema$n in the curved tube by reason of their in~tia, impinga on the
w~ll of the arc and then clrip into the oil sump through the Yertioal
seotion.
Thi~ const~ction has the advantage that a large part of the
gaseou~ refrigerant supplied through the suction connector reaches the
cuction s3und~proofer directly Bnd i~ therefore supplied to tho
rsfri~erant co~p~3ssor at a comparatively low temperature ~hlch9 by
., .., ~
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rea~on of the i~pro~ed degra2 of filli~g o~ the co~pr0ssor~ improves
tha efficlenc~O ~owevex, ln~tallin3 th~ Gurved tube to achleve
separation of the llquid oall~ for additional e~pense. I~ addition,
th~ EucXed-in gas i8 practlcally entirely ~eparated from the liquid~
Ihe inventlon 18 based on the problem of pro~idin~ a harmetl
cally encapsulated refr~gerator ~n which the ~eparatio~ of the liquid
can be achiaved by cheaper expedients.
~ hi~ problem is sol~ed according to the invention in that,
to ~orm a single llquid separator apparatus9 the inlet oxifioe is
alrrounded b~- an annular flang~,
~ hi~ constxuction results in a very simply con~tructed ~eparator
appara~us~ Surpris~ngly, a laræe part of thc llquia dropleta carried
along by the suction gas i9 separated at the annular flange from which
the liquid can drip into the sump. Ihi~ seems to occur because the
asnular flange considerably influences the flow of refri~erant ~a~
enteriIIæ the inlet orifice from the suction con~eotor, for e~cample
by the formatlon of ~wirli~g ef~eets. The liquid particles diverted
from the parallel path imping~ on the a2mular flan~ekr rea~on of their
inertia. However, a r~sidue of llquid droplats iB carTi~d lnto the
suotion conduit. Ihl8 i~ an advantage becausa a little oil i~ now
availa~le for lubricating the oylinder of the ref~igerant compre~aor.
iB oil reaches cylinder portions whlch are usually in~u~ici~ntly
suppliea with forced lubrioation. If liquld r~fri~erarlt ~s carried
along with tha ga~ thls 18 ha:~nla~ because the sm~ll quantity
ev~porates before it ent~rD tha oompre sor and even brlng~ about
~rth~r cooling of the ~uction ga~ and thu~ an improved d2gr~a of
~llllng.
. . .
~2~ D4~
The correct proportion of ~eparated and c~rriedralong liquid
~n ba determ~ned for a parti~ular ¢a~e by selectln~ t~diameter of
th~ inlet orif~ce, the dlameter o~ the a~nular flange and the spa¢ing
batween the inlet orifica and thesuctlon ¢onnQctor1
To enable as high a peroenta~e of the ~iqu~d to be separated
a~ possible~ the diameter of the inlet orifice ~hould be no ~o~e than
cqual to the diameter of the ~uotion conne~tor.
~ est xe~lts are obtained if the diameter of the flange
aubstantiall~ corre~ponds to two to four t~mes the diameter of ~he
~nlet orifi¢e.
~ ur~her, provision ~hould be made for the spacing to be 198
than twLce the diameter of the inlet orifice.
It i8 particularl~ advanta~ous if the ena sectio~ of the
auction oonne~tor and the starting 8eCtion of the ~u¢tion Gonduit
extend ~ertically and the inlet ori~ice is d~sposed above this end
section. In ~hi3 po~ltion, th~ 8eparati~g effeot i9 ~upported b~ the
weigl~t o~ the liquid droplet~. ~hrther, symmetrical condition~ ar~
obtained in relation to the annular flan~e, likewi~e with due regard
t~ the weight.
~ h9 ~n~ention will now be described in more detail with
referenoe to an e~2mple ~hown in the drawing~ The latter illustrates
dia~ram~atic fragment of an ~ncapsulated refrigerator.
In a oap~ula 1 there i3 an ~nterior chamber2 whlch i~ undex
~uotlon Rre~suxe and ln whioh there i~ a motor eompres30r M con~isting
Or ~ electric motor ana a re~ri~arant Compre850r dri~n th~reby.
~hese parts ar0 resiliently supported in the cap~ule 1 in a conventional
mannar- An oil ~ump 3 is located at the ba~a of th~ interior chamber
2.
, . .
~Z~
~ ~uotion co~mector 4 pas~es through the wall of the capsule 1
and comprise~ a ~ertically upwardly directed end section 5. At a
spacing A thex~abovs9 ther~ ia an inlet orifice 6 of a suotion
conduit 7 havin~ a vertically extendin~ ~tarting section ~. The
inlet ori~ice has a dla~eter d. It ~ ~urrounded by an annular
flange g having an external diamater ~. h ~uction solmd damper 10
1~ inserted in the euctio~ conduit 7. It~ outlet tube 11 leads to
the compressor input. Genarally9 the ~uction sound damper 10 i8
mechanlcally fixed to the compressor.
The diameter d of the inlet orifice i8 equal to theinternal
diameter e of the suction conneotor. ~he spacing A should be less
than twice the dlameter d o~ the inlet orlflce and in the pre~en~
oase has a dlameter d. The diameter D of the annular flange 9 should
be between two and four times the dlameter d of the inlet orl~lee
and i~ in the present oase threo times the valua.
In one embodiment, the i~te~nal dLameter e o~ the suotion
oonneotor 4 ana the diameter d of the lnlet orifice 6 had the value
of 5 mm. With the a~orem~nt$oned pro~ortions of the dimension~, ~bout
80% of the li~uid:oarried along by the ~uction ga~ wa~ 6eparated
whereas about 20% ¢ontinued along the suotion oondult 7D
~ he arrangement i~ al~o u8efl1 if, because of the resilient
~u~pension of the motor compre3sor~ the inlet orifi¢e 6 moves relatively
to the ena seotion 5 of the ~uotion connector~ ~hi~ i~ becau~e the
spaoing A rluctuatea about a predetermined mean value which can be
baksn f~to considoration instead of the fixed ~paoing. During periodic
di:splacement of thn inlet oriflce perpendicul~r to its axl~, the
~eroentage o~ separated liquid lnorea~e~, whioh ¢an likewi~e be taken
into oon~ideratlon when ohoosln6 th~ dimension~. .
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