Sovutgichli quritgichning asosiy tarkibiy qismlarining roli
1. Sovutgich kompressor
Sovutish kompressorlari sovutish tizimining yuragi va bugungi kunda kompressorlar germetik qabul qiluvchi kompressorlardan foydalanadilar. 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. kondensater
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. Bu sovutish jarayoniga doimiy ravishda davom etishga imkon beradi.
3. Evaporatator
4. Termostatik kengaytirish valfi (kapillyary)
Termostatik kengaytirish valfi (kapillyary) - bu sovutish tizimining keskin mexanizmi. In the refrigeration dryer, the supply of the evaporator refrigerant and its regulator is realized through the throttling mechanism. Sovutish mexanizmi ayg'oqchilikni yuqori haroratli va yuqori bosimli suyuqlikdan kirishga imkon beradi.
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), shu bilan sovutish va quritish tizimining isitish yukini kamaytirish va energiya tejash maqsadida. 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. Issiqlik almashtirilmaganligi sababli, sovuq havo qayta ishlanmaydi va bug'lanishning issiqlik yuklanishi ko'p narsani oshiradi. 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.
Siqilgan havo qayta ishlash
Ta'minot va tekshirish: Sovutgichning shkafi haroratini noldan yuqori ushlab turing.
Siqilgan havo haroratini kamaytirish uchun muzlatgichning bug'lanishi harorati ham juda past bo'lishi kerak. 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 "Suyuq siqish";
Tekshirmoq
1
2. Bug'lanish bosimi 3.4MPA-0,5mpa;
3. Yuqori bosimli bosim o'lchagich 1.2MPA-1.6MPA
4. Ko'pincha drenaj va kanalizatsiya tizimlariga e'tibor bering
Operatsion muammo
Yuklashdan oldin 1 ta tekshiring
1.1 Quvur tarmoq tizimining barcha valflari qondirish normal holatda;
1.2 Sovutish suv klamasi ochilgan, suv bosimi 0,15-0,4 mpa orasida bo'lishi kerak, va suv harorati 31˚ dan past;
1.3 Sovutgich yuqori bosim metr va sovutish joyi asboblar panelidagi kam bosimli o'lchagich mavjud va asosan teng.
1.4 Quvvatli quvvatni tekshiring, bu esa baholangan qiymatning 10% dan oshmasligi kerak.
2 yuklash tartibi
2.1 Boshlash tugmachasini bosing, AC kontaktori 3 minutga kechiktiriladi, so'ngra boshlandi va sovutgich kompressor ishga tushadi;
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; Bu vaqtda mashina normal ish holatiga kirdi.
2.6 Quritgichning ish sharoitlarini muntazam ravishda tekshiring, havo kirish va chiqish bosimi, sovuq ko'mirning yuqori va past bosimi va boshqa bosimni tekshiring.
3 o'chirish tartibi;
3.1 Chiqish vositasini yoping;
3.3 STOP tugmasini bosing.
4 XAVFLAR
4.1 Yuklanmasdan uzoq vaqt yugurishdan saqlaning.
4.2 Sovutgich kompressorini doimiy ravishda boshlamang va soatiga boshlanadi va stakanlar soni 6 martadan oshmasligi kerak.
4.3 Gaz ta'minotining sifatini ta'minlash uchun boshlang'ich va to'xtash tartibiga ishonch hosil qiling.
4.3.1 Boshlash: Quritgich havo kompressorini yoki Inletnalni ochishdan oldin 3-5 daqiqa davomida yugursin.
4.3.2 O'chirish: Avval havo kompressorini yoki chiqish valfini o'chiring va keyin quritgichni o'chiring.
4.5 Havo bosimi 0,95mpa dan oshmasligi kerak.
4.6 Kirish havo harorati 45 darajadan oshmaydi.
4.7 sovutish suvining harorati 31 darajadan oshmaydi.
4.9 Elektr nazorati kvadratiga sozlash hajmi 3 daqiqadan kam bo'lmasligi kerak.
4.10 Umumiy foydalanish "Boshlash" va "Stop" tugmachalarini boshqarayotganda
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. Sovutgichning yuqori bosimi oshganda, fan avtomatik ravishda boshlanadi.
Post vaqti: Avgust-26-2023