Ukufakwa nokumataniswa kwe-valve yokwandisa i-chiller

1. Ukufanisa

Ngokusho kokulahlekelwa kokumelana kwe-R, Q0, t0, tk, ipayipi eliwuketshezi nezingxenye ze-valve, izinyathelo yilezi:

Nquma umehluko wengcindezi phakathi kweziphetho ezimbili ze-valve yokwandisa;

Nquma uhlobo lwe-valve;

Khetha imodeli kanye nokucaciswa kwe-valve.

1. Thola umehluko wengcindezi phakathi kweziphetho ezimbili zevalvu:

ΔP=PK-ΣΔPi-Po(KPa)

Kufomula: PK――ingcindezi yokujiya, KPa, ΣΔPi――is ΔP1+ΔP2+ΔP3+ΔP4 (ΔP1 ukulahlekelwa ukumelana kwepayipi eliwuketshezi; ΔP2 ukulahlekelwa ukumelana kwendololwane, ivalvu, njll.; ΔP3 yi- ukukhuphuka kwepayipi eliwuketshezi Ukulahlekelwa yingcindezi, ΔP3=ρɡh, ΔP4 ukulahlekelwa kokumelana kwekhanda elikhiphayo kanye ne-capillary ekhiphayo, ngokuvamile i-0.5bar ngayinye); Ingcindezi ye-Po—ehwamukayo, i-KPa.

2. Thola uhlobo lwevalvu:

Ukukhethwa kwebhalansi yangaphakathi noma ibhalansi yangaphandle kuncike ekwehleni kwengcindezi ku-evaporator. Ohlelweni lwe-R22, lapho ukwehla kwengcindezi kudlula izinga lokushisa elihambisanayo lokuhwamuka ngo-1°C, kufanele kusetshenziswe ivalvu yokwandisa ukushisa elinganiswe ngaphandle.

3. Khetha imodeli kanye nokucaciswa kwe-valve:

Ngokusho kwe-Q0 kanye ne-ΔP ebaliwe ngaphambi nangemuva kwevalvu yokunweba kanye nezinga lokushisa elihwamukayo elingu-t0, hlola imodeli yevalvu nomthamo wevalvu etafuleni elifanele. Ukuze kube lula izinqubo ezihambisanayo, kungase futhi kwenziwe ngokuvumelana nezinyathelo zobuchwepheshe zokuklama. Imodeli kanye nokucaciswa kwe-valve ekhona yokwandisa okushisayo kufanele kusekelwe kuhlobo lwesiqandisi esisetshenziswa ohlelweni lwesiqandisi, ububanzi bokushisa okuhwamukayo kanye nobukhulu bomthwalo wokushisa we-evaporator. Ukukhetha kufanele kuhlangabezane nezidingo ezilandelayo:

(1) Umthamo we-valve yokwandisa ukushisa okhethiwe ungama-20-30% mkhulu kunomthwalo wangempela oshisayo we-evaporator;

(2) Kuzinhlelo zesiqandisi ezingenawo i-valve yokulawula umthamo wamanzi okupholisa noma izinga lokushisa lamanzi okupholisa liphansi ebusika, lapho kukhethwa i-valve yokunweba eshisayo, umthamo wevalvu kufanele ube mkhulu ngo-70-80% kunomthwalo we-evaporator, kodwa ubukhulu akumele budlule okungu-2 komthwalo wokushisa we-evaporator. Izikhathi;

(3) Lapho kukhethwa ivalvu yokunweba eshisayo, ukwehla komfutho wepayipi eliphakela uketshezi kufanele kubalwe ukuze kutholwe umehluko wengcindezi ngaphambi nangemuva kwevalvu, bese ukucaciswa kwevalvu yokwandisa okushisayo kufanele kunqunywe ngokuya ngokubala kwevalvu yokunwebeka. ithebula lomthamo elinikezwe umenzi.

Okwesibili, ukufakwa

1. Hlola ukuthi isesimweni esihle yini ngaphambi kokuyifakela, ikakhulukazi ingxenye yendlela yokuzwa izinga lokushisa;

2. Indawo yokufaka kufanele ibe seduze ne-evaporator, futhi umzimba we-valve kufanele ufakwe ngokuqondile, ungatsheki noma ubheke phansi;

3. Uma ufaka, qaphela ukugcina uketshezi kumshini wokuzwa izinga lokushisa esikhwameni senzwa yokushisa ngaso sonke isikhathi, ngakho isikhwama senzwa yokushisa kufanele sifakwe ngaphansi kwe-valve yomzimba;

4. Inzwa yezinga lokushisa kufanele ifakwe epayipini lokubuyisela elivundlile le-evaporator kaningi ngangokunokwenzeka, futhi kufanele ngokuvamile libe ngaphezu kuka-1.5m kude nembobo yokudonsa ye-compressor;

5. Isikhwama senzwa yokushisa akufanele sibekwe epayipini elimanzi;

6. Uma i-outlet ye-evaporator ine-exchanger ye-gas-liquid, iphakheji yokuzwa izinga lokushisa ngokuvamile isendaweni yokuphuma kwe-evaporator, okungukuthi, ngaphambi kwesishintshi sokushisa;

7. I-bulb ezwa izinga lokushisa ngokuvamile ifakwa epayipini elibuyayo le-evaporator futhi isongwe ngokuqinile odongeni lwepayipi. Indawo yokuxhumana kufanele ihlanzwe esikalini se-oxide, iveze umbala wensimbi;

8. Uma ububanzi bepayipi lomoya elibuyayo lingaphansi kwama-25mm, isikhwama senzwa yokushisa singaboshelwa phezulu kwepayipi lomoya elibuyayo; lapho ububanzi bukhulu kuno-25mm, bungaboshwa ku-45 ° ohlangothini olungezansi lwepayipi lomoya elibuyayo ukuze kuvinjelwe izici ezifana nokuqoqwa kwamafutha phansi kwepayipi ekuthinteni umuzwa. Umqondo olungile webulb yezinga lokushisa.

Okwesithathu, ukulungisa iphutha

1. Setha i-thermometer endaweni yokuphuma kwe-evaporator noma usebenzise ingcindezi yokumunca ukuze uhlole izinga lokushisa okuphezulu;

2. I-degree of superheat incane kakhulu (ukunikezwa koketshezi kukhulu kakhulu), futhi induku yokulungisa ijikeleza isigamu sokujika noma ijika elilodwa ngokwewashi (okungukuthi, ukwandisa amandla entwasahlobo nokunciphisa ukuvulwa kwe-valve), lapho ukugeleza kwesiqandisi kuncipha; intambo yenduku yokulungisa ijikeleza kanye Inani lokuphenduka akufanele libe liningi kakhulu (intambo yokulungisa ijika ijika elilodwa, ukushisa okuphezulu kuzoshintsha cishe ngo-1-2 ℃), ngemva kokulungiswa okuningi, kuze kube yilapho izidingo zifinyelelwa;

3. Indlela yokulungisa i-Empirical: Vula isikulufu senduku yokulungisa ukuze ushintshe ukuvuleka kwe-valve, ukuze kube nesithwathwa noma amazolo ngaphandle nje kwepayipi elibuyayo le-evaporator. Kudivayisi yesiqandisi enezinga lokushisa elikhuphukayo elingaphansi kwama-degree angu-0, uma uyithinta ngezandla zakho ngemva kokuqhwaza, uzoba nomuzwa obandayo wokunamathela izandla zakho. Ngalesi sikhathi, idigri yokuvula ifanelekile; ngezinga lokushisa lokuhwamuka elingaphezu kwama-degree angu-0, ukufiphala kungabhekwa njengokwahlulela kwesimo.