Ukufakwa kunye nokuhambelana kwevalve yokwandisa i-chiller

1. Ukuthelekisa

Ngokwelahleko yokumelana ne-R, Q0, t0, tk, umbhobho wolwelo kunye neendawo zevalvu, amanyathelo ngala:

Ukumisela umahluko woxinzelelo phakathi kweziphelo ezimbini zevalve yokwandisa;

Qinisekisa ifom yevalve;

Khetha imodeli kunye neenkcukacha zevalve.

1. Qinisekisa umahluko woxinzelelo phakathi kweziphelo ezimbini zevalvu:

ΔP=PK-ΣΔPi-Po(KPa)

Kwifomula: PK――ingcinezelo yoxinzelelo, KPa, ΣΔPi――is ΔP1+ΔP2+ΔP3+ΔP4 (ΔP1 yilahleko yokuxhathisa kombhobho wolwelo; ΔP2 yilahleko yokuxhathisa kwengqiniba, ivalve, njl.; ΔP3 yi ukunyuka kombhobho we-liquid Ilahleko yoxinzelelo, ΔP3=ρɡh; Uxinzelelo lwe-Po- oluba ngumphunga, i-KPa.

2. Qinisekisa uhlobo lwevalvu:

Ukukhethwa kwebhalansi yangaphakathi okanye ibhalansi yangaphandle kuxhomekeke ekunciphiseni uxinzelelo kwi-evaporator. Kwinkqubo ye-R22, xa ukuhla koxinzelelo kudlula iqondo lokushisa elihambelanayo le-evaporation nge-1 ° C, i-valve yokwandisa i-thermal yangaphandle kufuneka isetyenziswe.

3. Khetha imodeli kunye neenkcukacha zevalvu:

Ngokutsho kwe-Q0 kunye nokubalwa kwe-ΔP ngaphambi nangemva kwevalve yokwandisa kunye nobushushu bokufudumala kwe-t0, khangela imodeli yevalve kunye nomthamo wevalve kwitafile efanelekileyo. Ukuze kube lula iinkqubo ezihambelanayo, inokuphinda iqhutywe ngokwemiqathango yoyilo lobugcisa. Imodeli kunye neenkcukacha zevalve ekhoyo yokwandisa i-thermal kufuneka isekelwe kuhlobo lwefriji esetyenziswa kwi-refrigeration system, uluhlu lweqondo lokushisa eliphumayo kunye nobukhulu bomthwalo wokushisa we-evaporator. Ukhetho kufuneka luhlangabezane nezi mfuno zilandelayo:

(1) Umthamo wevalve yokwandisa i-thermal ekhethiweyo yi-20-30% enkulu kunomthwalo wangempela we-thermal we-evaporator;

2 kodwa ubuninzi akufunekanga budlule kwi-70 yomthwalo wobushushu be-evaporator. Amaxesha;

(3) Xa ukhetha ivalve yokwandisa i-thermal, ukuhla koxinzelelo lombhobho wonikezelo lwamanzi kufuneka kubalwe ukufumana umahluko woxinzelelo phambi nasemva kwevalve, kwaye ke ukucaciswa kwevalve yokwandisa ubushushu kufuneka kumiselwe ngokobalo lwevalve yolwandiso. itheyibhile yomthamo ebonelelwe ngumenzi.

Isibini, ukufakela

1. Khangela ukuba ikwimeko entle na phambi kofakelo, ingakumbi inxalenye yesixhobo sokubona ubushushu;

2. Indawo yokufakela kufuneka ibe kufuphi ne-evaporator, kwaye umzimba we-valve kufuneka ufakwe ngokuthe nkqo, ungatyeki okanye ujonge phantsi;

3. Xa ufaka, qaphela ukugcina ulwelo kwindlela yokuva ubushushu kwingxowa yokuva ubushushu ngamaxesha onke, ngoko ke ingxowa yokuva ubushushu kufuneka ifakwe ngaphantsi komzimba wevalvu;

4. Inzwa yobushushu kufuneka ifakwe kumbhobho wokubuyiswa othe tyaba wokuphuma kwe-evaporator kangangoko kunokwenzeka, kwaye kufuneka ngokubanzi ibe ngaphezu kwe-1.5m kude nezibuko lokufunxa lecompressor;

5. Ingxowa yokuva amaqondo obushushu mayingafakwa kumbhobho ngokukhupha amanzi;

6. Ukuba i-outlet ye-evaporator ine-gas-liquid exchanger, iphakheji yokuva iqondo lokushisa ngokuqhelekileyo kwindawo yokuphuma kwe-evaporator, oko kukuthi, phambi komtshintshi wobushushu;

7. Ibhalbhu yokuva iqondo lokushisa idla ngokufakwa kumbhobho wokubuya we-evaporator kwaye isongelwe ngokuqinileyo eludongeni lombhobho. Indawo yoqhagamshelwano kufuneka ihlambuluke kwisikali se-oxide, iveze umbala wesinyithi;

8. Xa ububanzi bombhobho womoya obuyayo bungaphantsi kwama-25mm, isikhwama sokuva iqondo lokushisa sinokubotshwa phezulu kumbhobho womoya wokubuyisela; xa ububanzi bukhulu ngaphezu kwe-25mm, inokubotshwa kwi-45 ° yecala eliphantsi lombhobho womoya wokubuyisela ukukhusela izinto ezifana nokuqokelelwa kweoli phantsi kombhobho ekuchaphazela ukuvakalelwa. Uluvo oluchanekileyo lwebhalbhu yobushushu.

Okwesithathu, ukulungisa ingxaki

1. Seta ithemometha kwindawo yokuphuma kwe-evaporator okanye usebenzise uxinzelelo lokufunxa ukujonga iqondo lobushushu obukhulu;

2. Iqondo lokushisa lincinci kakhulu (unikezelo lolwelo lukhulu kakhulu), kwaye intonga yokulungelelanisa ijikeleza isiqingatha sokujika okanye enye ijika nge-clockwise (oko kukuthi, ukwandisa amandla entwasahlobo kunye nokunciphisa ukuvuleka kwevalve), xa ukuhamba kwefriji kuncipha; intambo yokulungisa intonga ijikeleza kanye Inani lokujika akufanele libe lininzi kakhulu (intambo yokulungelelanisa ijika ijika enye, i-superheat iya kutshintsha malunga ne-1-2 ℃), emva kohlengahlengiso oluninzi, de kube kuhlangatyezwane neemfuno;

3. Indlela yokulungelelanisa i-Empirical: Jika i-screw yentonga yokulungelelanisa ukuze utshintshe ukuvuleka kwevalve, ukuze iqabaka okanye umbethe wenze ngaphandle kombhobho wokubuyisela we-evaporator. Kwisixhobo sefriji kunye neqondo lokushisa lokunyuka kwe-evaporation ngaphantsi kwe-0 degrees, ukuba uyayibamba ngezandla zakho emva kweqhwa, uya kuba nemvakalelo ebandayo yokubamba izandla zakho. Ngeli xesha, idigri yokuvula ifanelekile; kuba iqondo lobushushu ephuphumayo ngaphezu 0 degrees, condensation ingathathwa Situation isigwebo.