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WESTPOINT Commercial Air conditioners
INVERTER VRF COMMERCIAL A/C
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Contents
What’s WMV VRF!1
Residential central air AC2
WMV ener"# cons$m%tion anal#sis3
&i"ital scroll VS In'erter 4
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Part GMV & VRFⅠ
Review of VRF(VRV) Variable R efrigerant Flow
&e'elo%in" (rom traditional s%lit t#%e air conditioner)
Consist o( o$tdoor $nits* indoor $nits* Re(net* controlleretc)
One o$tdoor $nit can dri'e at least +, indoor $nits* -ith-hich di((erent ca%acit# and a%%earance)
A%%lied intensi'el# in o((ice .$ildin"* hotel* hi"h "radede%artment* 'illa etc)
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Introduction of GMV
W– W!"P#I$"
M – Multi%connected (Ma' *+)
V – VRF s,ste-
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+ wa,s to ac.ieve VRV
In'erter Originating from Japan, frequencyconversion;
Electrical adjustment;
&i"ital scrollTechnology from opeland;
Mechanic adjustment;
!otor
!eluctance motor
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'G' WMV in office building
Com.ination-ith
O$tdoor (resh
air %rocessor
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Fa-il, of residential central /C
+) &$ct t#%e Lo- initial in'estment
Indoor air 0$alit# im%ro'e .# introd$ction o((resh air
Re0$ire eno$"h hei"ht to la#o$t the d$ct
Indi'id$al ad1$stment (or sin"le room nota'aila.le
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Mini C.iller%1,draulic s,ste-
All2Water s#stem 3-ater or eth#lene alcohol4
Ado%t Fan coils as terminals* s%ace sa'in"
Witho$t (resh air introd$ction
Indi'id$al control (or each room a'aila.le
5) Mini Chiller
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Figure Ratio of VRV a22lication in 3a2an
Old .$ildin"
redecoration
Ne- (acilit#
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Part WMV energ, saving anal,sisⅢ
Ne- orientation in -or7in" conce%t
Ado%tin" di"ital scroll com%ressor
8sin" re(ri"erant as heat trans(er medi$m
So%histicated controllin" net-or7
Com.ination -ith heat reco'er# %rocessor
Core (actorsCore (actors
Sa'in" ener"#Sa'in" ener"#
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' $ew orientation in designing conce2t
Traditional
desi"nin" .ase
on the most
se'er o$tdoorcondition)
Pea7 o( EER/COP
sets at %artial
load) 3aro$nd 9:;
o( the ($ll load4
Coolingload
(4)
Wor5ingti-e (4)
Coolingload
(4)
Wor5ingti-e (4)
66 76 87
97 8+ +7 +
&ata ori"inate< American Societ# o( =eatin"* Re(ri"eratin"
and Air2conditionin" En"ineers) 3AS=RAE4
Ratio o( coolin" load thro$"ho$t one #ear ;
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+' /do2t digital scroll co-2ressor
Traditional residential s%lit t#%e AC ado%ts Rotar# t#%e com%ressor
The e((icienc# o( Scroll t#%e com%ressor is hi"her than Rotar# t#%e or
Reci%rocal t#%e com%ressor
Ener"# cons$m%tion can .e red$ced .# +:2+>; com%ared -ith the
reci%rocal t#%e at the same ca%a.ilit#
Co-2aring Ite-s !croll t,2e Rotar, t,2e Reci2rocal t,2e
R +': +'8;+'< +'+;+'<
Volu-etric efficienc, 6':: 6':8 6'9
/diabatic efficienc, 6':= 6':* 6'==
$u-' of 2art in
co-2ression c.a-ber
* 9
Weig.t ratio 6'= 6'= '6
Mac.ining 2recision ;* * 6;*6
#ut2ut 2ower ;6 6'8; ;6
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Core co-2onent of digital scroll
S$ction Pi%e
&ischar"e Pi%e
?Fi@ed Scroll.#2%ass %i%e
Or.it Scroll
Varia.le Ca%acit# Ad1$stment is achie'ed .# PWM 3P$lse2Width2Mod$lation4 'al'e
Loadin"
Idlin"
Ba%< +mm.et-een t-o
scrolls
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/d>ust ca2abilit, out2ut
P$lse2-idth< Maintain a .alance.et-een &emandin" and Pro'idin"
?&i"ital< loadin"2+::;3+4* -hile
Idlin"2:;3:4* (ormin" the se0$ence
: + : + : + : + : + : + : + D))
&i"ital M$lti 8nit
In'erter 8nit C o o l i n "
C a % a c i t #
Ca%acit# &emanded
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*' ?sing refrigerant as .eat transfer -ediu-
In BMV* heat trans(erred 'ia re(ri"erant directl#
The heat amo$nt trans(erred can .e +: times o( those trans(erred .#-ater* and 5: times 'ia air)
Com%arin"< Pro%ert# o( heat trans(er medi$m
",2es of
-ediu-?tili@ed .eat "ransfer a-ount
nerg, consu-2tion(transfer +6 5W
cool load)
Water sensible heat 20.1kJ/kg (△t=5 )℃ 4.8
/ir sensible heat 10.1kJ/kg (△t=10 )℃ 7.5
Refrigerantevaporating
latent heat206kJ/kg 2.6
>9; o( those trans(er 'ia -ater
6>; o( those trans(er 'ia air
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8' !o2.isticated intelligent controlling
Controlling #b>ect
For-ing t.e networ5 Sensors 3tem%erat$re* %ress$re4
Throttlin" de'ices 3electrical e@%ansion 'al'es* %ore %lates4
Ad'anced lo"ical al"orism
Aasic 2rinci2le
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7' Co-bination wit. .eat recover, 2rocessor
To im%ro'e the IA* %eo%le can o%en the -indo-s sometimes* or
install a 'entilatin" (an connect to o$tside
$t coolin" load -o$ld rise* and $n(iltered air -ith insta.le and
$nrelia.le (actor -o$ld %enetrate in)
The Fresh Air =eat2Reco'er# S#stem can sol'e this %ro.lem
Introd$ce more (iltered (resh air into the room
Rec#cle heat or coolin" 3e((icienc# G>;4
Red$ce the amo$nt o( %oisono$s released (rom the .$ildin" material
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".e air route inside t.e s,ste-
+) E@cellent -ater a.sor.a.ilit#
e@chan"in" e((icienc# reaches G>;
5) S$%er (ire2retardant
Sa(e and relia.le
6) Milde-2%roo(* clean health#)
Ret$rnin" air o(
indoor
Cooled (resh air
introd$ced in
E@ha$st air
S$ction o(o$tdoor air
Com%ared to traditional -a# o( 'entilation* Fresh air
%rocessor red$ces 5H; o( ener"# cons$m%tion
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!u--ar,
WMV can .e a%%lied intensi'el# in o((ice.$ildin"* hotel* l$@$r# de%artment* 'illa* etc)
En1o# a hi"h EER/COP $nder %artial load
Com.ination -ith (resh air %rocessor* can
im%ro'e IA sa'in" ener"# 3$% to 6:;4
&i"ital scroll t#%e VRF is more relia.le and
([email protected] than In'erter)