HFO R-1234yf kelajak sovutgichidir. Yoki, hech bo'lmaganda, bu qanday sotilgan. Yf asosiy e'tiborni ko'rgan birinchi HFO sovutgichi edi. Bir necha yil oldin Evropa Ittifoqida HFC R-134a avtomobillarini konditsionerlashtirishda foydalanishni to'xtatish uchun katta bosim yuzaga keldi. Bosim R-134a ega bo'lgan juda yuqori global isish potentsiali (GWP) tufayli edi. R-134a GWP bir ming to'rt yuz o'ttizga teng. U super ifloslantiruvchi moddalar qatoriga kiradi.
Dunyo muammolariga javob R-1234yf deb nomlanuvchi yangi HFO sovutgichining e'lon qilinishi bilan keldi. Yf sovutish suvi faqat to'rtdan iborat global isish imkoniyatiga ega. Bugungi bozorda boshqa sovutgichlar bilan taqqoslaganda bu juda katta farq. Yfning yagona salbiy tomoni shundaki, u biroz yonuvchan yoki ASHRAE va boshqa konditsionerlik tashkilotlari tomonidan 2L deb baholanadi.
Evropa Ittifoqi tezda R-134a-ni asta-sekin pasaytirib yubordi va yangi transport vositalari R-1234yfni olishni boshladi. YF ni qabul qilish bu erda ancha sekinroq bo'lsa-da, AQShda ko'plab avtomobil ishlab chiqaruvchilari mavjud bo'lib, ushbu sovutish moslamasini yangi rusumli avtoulovlarida ishlatishni boshladilar. Yildan-yilga ko'payib borayotgan avtoulovlar yil sayin ortib bormoqda.
Bosim jadvali 1234yf
Avtoulovning konditsionerini tashxislash haqida gap ketganda, dastlabki qadamlardan biri bu sizning tizimingiz ishlayotgan harorat va hozirgi bosimni tushunishdir. Bilan birga bu faktlarga ega bo'lishto'yinganlik nuqtasi,subkool, vahaddan tashqari issiqlikSiz ishlayotgan sovutgich uchun raqamlar sizning tizimingizda nima noto'g'ri ekanligini tushunish kerak bo'lganda juda muhimdir.
Quyidagi jadval bosimlarni va to'yinganlik nuqtasini yoki qaynash nuqtasini, R-1234yf:
| °F | °C | PSI | KPA |
| -94 | -70 | -9.82 | -67.7 |
| -90.4 | -68 | -9.26 | -63.8 |
| -86.8 | -66 | -8.65 | -59.6 |
| -83.2 | -64 | -7.99 | -55.1 |
| -79.6 | -62 | -7.27 | -50.1 |
| -76 | -60 | -6.49 | -44.7 |
| -72.4 | -58 | -5.65 | -39.0 |
| -68.8 | -56 | -4.73 | -32.6 |
| -65.2 | -54 | -3.75 | -25.9 |
| -61.6 | -52 | -2.69 | -18.5 |
| -58 | -50 | -1.55 | -10.7 |
| -54.4 | -48 | -0.33 | -2.3 |
| -50.8 | -46 | 0.99 | 6.8 |
| -47.2 | -44 | 2.39 | 16.5 |
| -43.6 | -42 | 3.89 | 26.8 |
| -40 | -40 | 5.49 | 37.9 |
| -36.4 | -38 | 7.19 | 49.6 |
| -32.8 | -36 | 9.01 | 62.1 |
| -29.2 | -34 | 10.94 | 75.4 |
| -25.6 | -32 | 12.99 | 89.6 |
| -22 | -30 | 15.17 | 104.6 |
| -18.4 | -28 | 17.47 | 120.5 |
| -14.8 | -26 | 19.91 | 137.3 |
| -11.2 | -24 | 22.49 | 155.1 |
| -7.6 | -22 | 25.21 | 173.8 |
| -4 | -20 | 28.08 | 193.6 |
| -0.4 | -18 | 31.11 | 214.5 |
| 3.2 | -16 | 34.29 | 236.4 |
| 6.8 | -14 | 37.64 | 259.5 |
| 10.4 | -12 | 41.17 | 283.9 |
| 14 | -10 | 44.87 | 309.4 |
| 17.6 | -8 | 48.75 | 336.1 |
| 21.2 | -6 | 52.82 | 364.2 |
| 24.8 | -4 | 57.09 | 393.6 |
| 28.4 | -2 | 61.56 | 424.4 |
| 32 | 0 | 66.23 | 456.6 |
| 35.6 | 2 | 71.11 | 490.3 |
| 39.2 | 4 | 76.21 | 525.4 |
| 42.8 | 6 | 81.54 | 562.2 |
| 46.4 | 8 | 87.09 | 600.5 |
| 50 | 10 | 92.89 | 640.5 |
| 53.6 | 12 | 98.92 | 682.0 |
| 57.2 | 14 | 105.21 | 725.4 |
| 60.8 | 16 | 111.75 | 770.5 |
| 64.4 | 18 | 118.55 | 817.4 |
| 68 | 20 | 125.63 | 866.2 |
| 71.6 | 22 | 132.98 | 916.9 |
| 75.2 | 24 | 140.62 | 969.5 |
| 78.8 | 26 | 148.54 | 1024.1 |
| 82.4 | 28 | 156.77 | 1080.9 |
| 86 | 30 | 165.3 | 1139.7 |
| 89.6 | 32 | 174.15 | 1200.7 |
| 93.2 | 34 | 183.32 | 1263.9 |
| 96.8 | 36 | 192.82 | 1329.4 |
| 100.4 | 38 | 202.65 | 1397.2 |
| 104 | 40 | 212.85 | 1467.5 |
| 107.6 | 42 | 223.39 | 1540.2 |
| 111.2 | 44 | 234.29 | 1615.4 |
| 114.8 | 46 | 245.57 | 1693.1 |
| 118.4 | 48 | 257.24 | 1773.6 |
| 122 | 50 | 269.31 | 1856.8 |
| 125.6 | 52 | 281.76 | 1942.7 |
| 129.2 | 54 | 94.75 | 653.3 |
| 132.8 | 56 | 100.09 | 690.1 |
| 136.4 | 58 | 105.62 | 728.2 |
| 140 | 60 | 111.34 | 767.7 |
| 143.6 | 62 | 117.26 | 808.5 |
| 147.2 | 64 | 123.38 | 850.7 |
| 150.8 | 66 | 129.71 | 894.3 |
| 154.4 | 68 | 136.26 | 939.5 |
| 158 | 70 | 143 | 986.0 |
