BI GING

T NG HA H

THNGTHNGTS. TRN I TIN

TRNG I HC NHA TRANG

05-2012

Chng 1: Cc thit b t ng cung cp dch1.1. Cung cp dich bng van tit lu nhit:

1. S lp t, N/L lm vic ca van tit lu mng cn bng trong

S lp t

CU TO

tay van Pt

kim phun

mng xp

bu cm bin

f

ng mao

m/c lnh vo thit b Phin lc

np chp

dch vo

R

Po

l xo

vt iu chnh

bay hi

kim phun

2. S lp t. N/L lm vic ca van tit lu mng cn bng ngoi.

S lp t

CU TO, N/L LM VIC

bu cm bin

ng mao

ty van

Po

Ptmng xp

ty van

Ni vi ng cn bng p sut ngoi

np chp

Phin lc

dch vo R

o

l xo

m/c lnh vo thit b bay hi

vt iu chnh

ty vanngoi

Trang b in iu khin

auto

MC

R

ManOFF

auto

N

SV

cos

L

Man

1.2. Cp dch theo mc lngThp pCao p1.2.1. V pha thp p1.2.1. V pha thp pMc ch: Duy tr mc dch trong bnh cha thp p c n nh v t cung cp dch cho thit b bay hi.

1. Thit b t ng cp dch kt hp VTL tay v r le phao

Khng c bm dch

Trang b in iu khin

auto

FS

R

ManOFF

auto

N

SV

cos

L

Man

C bm dch

Trang b in iu khin

2. Cp dch bng van tit lu mng cn bng ngoi vi bnh cha thp p

3. Cp dch bng van tit lu phao

Kt hp van tit lu phao v van PMFL

Van tit lu phao v pha thp p kt hp van PMFL

4. Cung cp dch cho thit b bay hi ng chm v bc da vo qu nhit

1.2.2. V pha cao pM: duy tr mc dch trong BCCA c n nh

Van tit lu phao v pha cao p kt hp van PMFH

1.3. Cung cp dch bng in(S dng van MEV hoc Van AKVA)

EKC 347 Controller

1. Van tit lu in t MEV

2. Van tit lu in t AKVA

Hnh nh Van van tit lu in t AKVA

1.4. Cung cp dch cho thit b bay hi bng ng mao

Dch t pha t TBNT

Pk, t

k vo thit b bay hi

ng mao Po, t

o

phin lck k

CHNG II: CC PHNG PHP IU CHNH NHIT

Mc ch: Duy tr nhit mi trng lm lnh, hay cht ti lnh c n nh

Cc phng php iu chnh:Cc phng php iu chnh:1. Nhy cp

2. Thang bc

3. Lin tc

2.1. iu chnh nhit bng phng php nhy cp (ON - OFF).

toC

tmax

S thay i nhit theo thi gian chy dng

tdng

tchy

tphttmin

R le nhit : 2 loi (C, in t)

l xo

l xo

Tip im

vt iu chnh

Cu to r le nhit dng c

ng maobu cm

bin

Tip im

ni vi mch iu khin

Thang o

Trang b in iu khin

mch khi ng my nn

R le nhit dng in t: Eliwell; Dixell- Eliwell

Trang b in iu khinCh thch : 12 Relay N.C; 13 Relay N.O; 67 Powersupply; 89 Probe input; A TTL input for Copy Card

R le DixellR le Dixell

Trc khi dng my chy rt ga

Trang b in iu khin

S lp t iu chnh nhit khc nhau cho hai phng lnh.

Trang b in iu khin.

2.2. Phng php /C Thang bc (tch xi lanh)

Tc ng gim ti

Piston

clp htclp nn

S lp t.

S lp t vo my nn

MNb

SV

Bm du c

n piston gim ti

b. Du i bi trn; c. Lm mt du; SV van in t

S lp t vo my nn.

piston

ty gim ti

l van ht

A

l xo

Cam gim ti

thanh gim ti

2.3. Phng php lm vic lin tc- ng m van chn ht

Phng php lm vic lin tc - Thay i s vng quang ca my nn (Bin tn)

Chng III: T ng ha thit b ngng t 1. iu chnh p sut ngng t gii nhit bng gi

2. Thit b ngng t kiu bay hi

3. Thit b ngng t gii nhit bng khng kh i lu cng bc (Bin i tn)

Chng 4: Cc thit b bo v my nn v iu khin khc

Khi c cc s c nh: p sut ht, p sut cao, hiu p sut du thp, p sut nc cao, hiu p sut du thp, p sut nc => tc ng n h thng iu khin cho

my nn dng ng thi n s c v mch bo ng lm vic.

LPS

1. R le bo v p sut thp: LPS (low pressugure switch)

MND-6

Thang o

L xo

Vt iu chnh

Cu to ca r le bo v p sut ht thp

Ni vi mch

iu khin

Thang o

Tip

im

21

3

LPS

Mng xp

Hnh nh rle bo v p sut thp

S in iu khin

Lp trc tip

Reset

3

1

2

LPS

B Z

LRMch khi ngmy nn off

on

2

Lp gin tip

2. R le bo v p sut nn cao HPS (high pressugure switch).

HPS

MN

Hnh nh rle bo v p sut cao

Thang o

L xo

Vt iu chnh

Cu to ca r le bo v p sut nn cao

Tip im

Thang o

Ni vi mch iu khin

5

4 6

HPS

Mng xp

Trang b in iu khin

6

Reset4

5

Mch K my nn 0ffon

BZ

LR

HPS LPS

3. R le bo v p sut kp (nn cao v ht thp)

MN

Hnh nh r le 2 kp (HPS/LPS)The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again.

HPS / LPS

Trang b in iu khin ca r le bo v p sut kp

L RMch K my nn

ONOFF

B Z

OPS

LP = Pcacte

b

OP

oil

4. R le bo v hiu p sut du OPS (Oil pressugure switch).- S lp t ca r le bo v hiu p sut du

MN

Bm du c

a.Van iu chnh p sut du

HP = Pdu

b

a

b.Du i bi trn

c. Lm mt du

Hnh nh Rle bo v p sut du

thang o

c iu chnh

LP

Cu to ca r le bo v hiu p sut du thp.

1

ni vi mch iu khin

mng xp

HP

thang o2 3 5

764

152Mx

2

Mch in iu khin ca r le bo v hiu p sut du thp lp t trc tip

Mch K my nn

on off

BZ

56

LR

2

7

4

3

S mch in lp t gin tip

52Mx

2

1OPS

AX3

AX - 3 AX - 3 AX - 3

3

4

6

5

Mch khi ng my nn

7

2

6BZAX

AX - 6alarmstop

AX - 6

RL

Mt s thit b iu khin khc

1. Thit b tch khkhng ngng t ng

2. Thit b lm mt du my nn trc vt

3. Thit b rt du t BCTA hay BTH

4. Thit b tch nc

Chng V: Trang b t ng ha cho mt s h thng lnh

- H thng lnh mt cp + Sn xut nc cy, nc lnh

+ Kho bo qun ng x tuyt bng in+ Kho bo qun ng x tuyt bng intr, ga nng, nc.

- H thng hai cp

1. H thng sn xut cy

R2

52C 52D 52S

MCB-1

TS

A432

A A A

Trang b in ng lc

M

Maykhuay

M2

Quat gioBmmc 2Bm

mc 1

M3

M4

M5

51C

52C 52D

51K

52S52K

51P1 51P2

52P1 52P2

51F

52F

Trang b in iu khin HTLSX cy

2. S HTL kho bo qun ng x tuyt bng ga nng(My lnh cng sut nh )

TL SV2

3SV

TD

SV1

MNKholnh

TBNT

Trang b in ng lc HTL kho BQ ng

Bm nc Qut TGN Qut dn lnh

Trang b in /K HTL kho BQ ng XT ga nng

3. S h thng lnh cho kho BQ ng x tuyt bng ga nng (Cng sut ln)

Trang b in ng lc h thng lnh cho kho BQ ng x tuyt bng ga nng

Trang b in iu khin h thng lnh cho kho BQ ng x tuyt bng ga nng

3. Trang b in ng lc HTL Kho BQ ng x tuyt bng in tr

tr x

Bm nc Qut TGN

Qut dn lnh

Dy in

tuyt

Trang b in /K HTL kho BQ ng XT in tr

Trang b in /K HTL kho BQ ng XT in tr dng r le Dixell

S h thng lnh cho t ng tip xc c bm dch

3

1SV2M

TD

M

TBNTTD

T ng tip xc

1

1M

FS-2

FS-1

SV

BCCA

2SV

BTH

BD

Bm nc

Bm dch

Bm dch

Bm du

Qut gi

Trang bi in iu khin

nc dch dch dugi

CHNG 6: CC LOI VAN CH V PILOT

THE PM VALVESTHE PM VALVESAND PILOTS

Hnh nh cc van pilot v van ch

VAN CH PM1 V PM3

CU TO VAN CH PM1

Pilot port

Manual spindle

Spring Servo pistonSpring

Throttle cone(logarithmic)

Servo piston

Strainer

Series port 2

Series port 1Parallel port

CU TO VAN CH PM3

Pressure gaugeconnection

S ng m van

"S 1" "S 2" "P"PM 3-?

Main valves

Open Closed OpenOpen Open Open OpenOpen Closed Closed ClosedOpen Closed Open OpenClosed Open Closed ClosedClosed Open Open OpenClosed Closed Closed ClosedClosed Closed Open Open

Pilot valves

Open

CC LOI VAN PILOT V GHP VI VAN PM

1. CVP-LP, Constant pressure pilot for LP side2. CVP-HP, Constant pressure pilot for LP side3. CVP-HP, Constant pressure pilot for HP side4. CVPP-LP, Differential pressure pilot for LP side5. CVPP-HP, Differential pressure pilot for HP side5. CVPP-HP, Differential pressure pilot for HP side6. EVM, NC solenoid valve pilot7. EVM, NO solenoid valve pilot8. CVC, Crank case pressure pilot9. CVC, Hot gas by-pass capacity pilot10. CVT, Temperature controlled pilot11. CVQ, Electronic temperature controlled pilot

1. n nh p sut bay hi (Evaporating pressure regulation)

Cu to van Pilot Valve CVP (LP)

2. n nh p sut ngng t (Condensing pressure regulation

Cu to van CVP

3. iu chnh v n nh hiu p sut (Differential pressure regulation)

Cu to van CVPP

4. iu chnh v n nh nhit mi trng cn lm lnh

CU TO VAN CVT

5. Lp t vi van ch PM1 ng m van

Cu to van in t pilots EVM-NC

Cu to van in t pilots EVM-NO

6. iu chnh v n nh p sut ht

Cu to van pilot CVC

7. N NH P SUT BAY HI V KT HP NG VAN CHN HT

8. N NH P SUT BAY HI V KT HP M VAN CHN HT

9. N NH P SUT BAY H, KT HP NG M VAN CHN HT, BO V P SUT THP

10. N NH NHIT MI TRNG CN LM LNH V P SUT BAY HI

11. N NH NHIT MI TRNG CN LM LNH, P SUT BAY HI V NG M VAN CHN HT