Lub luag haujlwm ntawm lub ntsiab Cheebtsam ntawm lub tshuab ziab khaub ncaws
Lub tshuab nqus tub yees tshuab yog lub plawv ntawm cov pa tub yees, thiab feem ntau compressors niaj hnub no siv hermetic reciprocating compressors. Raising the refrigerant from low to high pressure and circulating the refrigerant continuously, the system continuously discharges internal heat to an environment above the system temperature.
2. Condenser
The function of the condenser is to cool the high-pressure, superheated refrigerant vapor discharged by the refrigerant compressor into a liquid refrigerant, and its heat is taken away by the cooling water. Qhov no tso cai rau cov txheej txheem tub yees kom txuas ntxiv mus txuas ntxiv.
3. Evaporator
4. Thermostatic Expansion Valve (Capillary)
The thermostatic expansion valve (capillary) is the throttling mechanism of the refrigeration system. Nyob rau hauv lub tub yees tshuab ziab khaub ncaws, cov khoom siv ntawm cov dej txeej thiab nws cov kev tswj hwm yog pom tau los ntawm kev siv lub tshuab throtling. Lub tshuab dhos me me ua rau hauv tub yees nkag mus rau hauv cov txiv ntoo los ntawm qhov kub thiab txias thiab muaj dej siab.
5. Cua Sov Pauv
The vast majority of refrigeration dryers have a heat exchanger, which is a heat exchanger that exchanges heat between air and air, generally a tubular heat exchanger (also known as a shell and tube heat exchanger). The main function of the heat exchanger in the refrigeration dryer is to “recover” the cooling capacity carried by the compressed air after being cooled by the evaporator, and use this part of the cooling capacity to cool the compressed air at a higher temperature carrying a large amount of water vapor (that is, the saturated compressed air discharged from the air compressor, cooled by the rear cooler of the air compressor, and then separated by air and water is generally above 40 ° C), yog li txo cov cua sov thauj cov tub yees thiab kom qhuav lub zog thiab ua tiav lub hom phiaj txuag hluav taws xob. On the other hand, the temperature of low-temperature compressed air in the heat exchanger is recovered, so that the outer wall of the pipeline transporting compressed air does not cause “condensation” phenomenon due to the temperature below the ambient temperature. In addition, after the temperature of the compressed air rises, the relative humidity of the compressed air after drying is reduced (generally less than 20%), which is beneficial to prevent the rust of the metal. Some users (eg with air separation plants) need compressed air with low moisture content and low temperature, so the refrigeration dryer is no longer equipped with a heat exchanger. Txij li thaum tshav kub ua kom muaj zog, cov cua txias tsis tuaj yeem rov ua dua tshiab, thiab cov cua sov ntawm cov evaporator yuav nce ntau. In this case, not only does the power of the refrigeration compressor need to be increased to compensate for energy, but also the other components of the entire refrigeration system (evaporator, condenser and throttling components) need to be increased accordingly. From the perspective of energy recovery, we always hope that the higher the exhaust temperature of the refrigeration dryer, the better (high exhaust temperature, indicating more energy recovery), and it is best that there is no temperature difference between the inlet and outlet. But in fact, it is not possible to achieve this, when the air inlet temperature is below 45 °C, it is not uncommon for the inlet and outlet temperatures of the refrigeration dryer to differ by more than 15 °C.
Kev Siv Cua Cua
Kev saib xyuas thiab tshuaj xyuas: tswj hwm cov dew taw tes kub ntawm tub yees tshuab ziab khaub ncaws saum lub tshuab xoom.
Txhawm rau kom txo tau cov cua compressed cua kub, ntsuas kub ntawm lub tub yees txias yuav tsum tau tsawg heev. When the refrigeration dryer cools the compressed air, there is a layer of film-like condensate on the surface of the fin of the evaporator liner, if the surface temperature of the fin is below zero due to the decrease in the evaporation temperature, the surface condensate may freeze, at this time:
A. Due to the attachment of a layer of ice with a much smaller thermal conductivity on the surface of the inner bladder fin of the evaporator, the heat exchange efficiency is greatly reduced, the compressed air can not be fully cooled, and because of the insufficient heat absorption, the refrigerant evaporation temperature may be further reduced, and the result of such a cycle will inevitably bring many adverse consequences to the refrigeration system (such as “liquid nyem ");
Kuaj
1. Lub siab sib txawv ntawm cov inlet thiab qhov hluav taws xob ntawm cov cua compressed tsis tshaj 0.035mpa;
2. Evaporation siab koob tshuaj ntsuab 0.4Mpa-0.5MPA;
3. Kev kub siab siab lub koob haum Nyem 1.2MPA-1.6MPA
4. Feem ntau saib cov kua dej thiab cov kav dej phwj
Teeb meem kev ua haujlwm
1 kuaj ua ntej booting
1.1 Tag nrho cov li qub ntawm cov yeeb nkab network system yog nyob rau hauv lub xeev standby;
1.2 Lub taub dej txias txias tau qhib, cov dej siab yuav tsum tau nyob nruab nrab ntawm 0.15-0.4MPA, thiab dej kub qis dua 31 xyoos;
1.3 Cov tub yees txias dua thiab lub tub yees txias dua ntawm lub dashboard muaj cov ntawv qhia thiab yog qhov sib npaug;
1.4 Kos lub hwj huam hluav taws xob voltage, uas yuav tsum tsis pub tshaj 10% ntawm tus nqi ntsuas.
2 cov txheej txheem khau raj
2.1 Nias lub pob STARD, AC hu tau qeeb rau 3 feeb thiab tom qab ntawd pib, thiab lub tub yees ua teb pib khiav;
2.2 Observe the dashboard, the refrigerant high-pressure meter should slowly rise to about 1.4Mpa, and the refrigerant low-pressure meter should slowly drop to about 0.4Mpa; Nyob rau lub sijhawm no, lub tshuab tau nkag mus rau lub xeev ua haujlwm ib txwm muaj.
2.6 Tshawb xyuas cov kev ua haujlwm ntawm lub tshuab ziab khaub ncaws tsis tu ncua, sau cov pa hluav taws xob tsis tu ncua thiab qhov hluav taws xob siab, siab thiab muaj mob txias thiab lwm yam.
3 Cov txheej txheem kaw;
3.1 Kaw qhov hluav taws xob cua sov;
3.2 Kaw cov inlet huab cua valve;
3.3 Nias lub khawm Nres.
4 kev ceev faj
4.1 Zam tsis txhob khiav ntev ntev yam tsis muaj lub nra.
4.2 Tsis txhob pib ua tub yees ua tsis tu ncua, thiab muaj pes tsawg tus pib thiab nres hauv ib teev yuav tsis muaj ntau dua 6 zaug.
4.3 Txhawm rau kom ntseeg tau tias zoo ntawm cov pa roj, nco ntsoov ua raws li kev txiav txim ntawm kev pib thiab nres.
4.3.1 Pib: Cia lub tshuab ziab khaub ncaws khiav rau 3-5 feeb ua ntej qhib cov huab cua compressor lossis inlet valve.
4.5 Cov huab cua siab yuav tsis pub dhau 0.95mpa.
4.6 Cov pa ntxig cua kub tsis pub dhau 45 degrees.
4.7 Qhov ntsuas kub ntawm cov dej txias tsis pub dhau ntawm 31 degrees.
4.8 Thov tsis txhob tig thaum lub ambient kub yog qis dua 2ċ.
4.9 Lub sijhawm relay teeb tsa hauv hluav taws xob txee yuav tsum tsis pub tsawg tshaj 3 feeb.
4.10 Kev ua haujlwm dav dav ntev npaum li koj tswj tau "Pib" thiab "Nres" khawm
4.11 The air-cooled refrigeration dryer cooling fan is controlled by the pressure switch, and it is normal for the fan not to turn when the refrigeration dryer works at a low ambient temperature. Raws li lub tub yees txias siab nce siab, tus kiv cua pib tau.
Lub Sijhawm Post: Lub Yim Hli 26-2023