Jukumu la vifaa kuu vya kukausha jokofu
1. Compressor ya jokofu
Compressors za majokofu ni moyo wa mfumo wa majokofu, na compressors nyingi leo hutumia compressors za kurudisha Hermetic. 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. Hii inaruhusu mchakato wa majokofu kuendelea kuendelea.
4. Valve ya upanuzi wa thermostatic (capillary)
Valve ya upanuzi wa thermostatic (capillary) ni utaratibu wa kusisimua wa mfumo wa majokofu. Katika kavu ya majokofu, usambazaji wa jokofu la evaporator na mdhibiti wake hugunduliwa kupitia utaratibu wa kusisimua. Utaratibu wa kusisimua huruhusu majokofu kuingia kwenye evaporator kutoka kwa joto la juu na kioevu cha shinikizo kubwa.
5. Joto Exchanger
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), na hivyo kupunguza mzigo wa joto wa jokofu na mfumo wa kukausha na kufikia madhumuni ya kuokoa nishati. 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. Kwa kuwa exchanger ya joto haijasanikishwa, hewa baridi haiwezi kusindika tena, na mzigo wa joto wa evaporator utaongeza sana. 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.
Usindikaji wa hewa uliokandamizwa
Matengenezo na ukaguzi: Dumisha joto la umande la kukausha jokofu juu ya sifuri.
Ili kupunguza joto la hewa lililoshinikwa, joto la kuyeyuka la jokofu lazima pia iwe chini sana. 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 compression ”);
Chunguza
1. Tofauti ya shinikizo kati ya kuingiza na njia ya hewa iliyoshinikwa haizidi 0.035MPa;
2. Shinikizo la kuyeyuka hupima 0.4MPA-0.5MPA;
4. Angalia mara kwa mara mifereji ya maji na maji taka
Suala la operesheni
Angalia 1 kabla ya kupiga
1.2 Valve ya maji baridi inafunguliwa, shinikizo la maji linapaswa kuwa kati ya 0.15-0.4mpa, na joto la maji liko chini ya 31ċ;
1.3 Mita ya shinikizo kubwa ya jokofu na mita ya shinikizo ya chini kwenye dashibodi ina dalili na kimsingi ni sawa;
1.4 Angalia voltage ya usambazaji wa umeme, ambayo haizidi 10% ya thamani iliyokadiriwa.
2 Utaratibu wa Boot
2.1 Bonyeza kitufe cha kuanza, anwani ya AC imechelewa kwa dakika 3 na kisha kuanza, na compressor ya jokofu huanza kukimbia;
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; Kwa wakati huu, mashine imeingia katika hali ya kawaida ya kufanya kazi.
2,5 Angalia ikiwa mifereji ya maji moja kwa moja ni ya kawaida;
2.6 Angalia hali ya kufanya kazi ya kukausha mara kwa mara, rekodi ya kuingiza hewa na shinikizo la nje, shinikizo la juu na la chini la makaa ya baridi, nk.
3 Utaratibu wa kuzima;
3.1 Funga valve ya hewa ya nje;
3.3 Bonyeza kitufe cha STOP.
Tahadhari 4
4.1 Epuka kukimbia kwa muda mrefu bila mzigo.
4.2 Usianzie compressor ya jokofu kuendelea, na idadi ya kuanza na kuacha kwa saa haitakuwa kubwa kuliko mara 6.
4.3 Ili kuhakikisha ubora wa usambazaji wa gesi, hakikisha kufuata kwa amri ya kuanza na kuacha.
4.3.1 Anza: Wacha kavu iendeshe kwa dakika 3-5 kabla ya kufungua compressor ya hewa au valve ya kuingiza.
4.3.2 Kuzima: Zima compressor ya hewa au valve ya kwanza kisha uzima kavu.
4.5 Shinikizo la hewa halitazidi 0.95MPa.
4.7 Joto la maji baridi halizidi digrii 31.
4.9 Mpangilio wa wakati wa kurudi kwenye baraza la mawaziri la kudhibiti umeme hautakuwa chini ya dakika 3.
4.10 Operesheni ya Jumla Kadri unavyodhibiti vifungo vya "Anza" na "Acha"
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. Kadiri shinikizo kubwa ya jokofu inavyoongezeka, shabiki huanza moja kwa moja.
Wakati wa chapisho: Aug-26-2023