+ (86) 188 5854 3665 ។



អ្នកនៅទីនេះ៖ ទំព័រដើម>ពត៍មាន>ដំណឹងឧស្សាហកម្ម

កត្តា 3 នៃបច្ចេកវិទ្យាត្រជាក់ IQF

ពេលវេលា: 2019-06-27

First, the effect of cooling medium temperature. Under the process conditions of IQF Freezing Machine , the lower the temperature of the cooling medium, the faster the product freezes under the same conditions. At present, according to the specific situation in China, most of the ammonia is used as a refrigerant, and the evaporation temperature is generally selected between -35 and -45 °C. Under the IQF process, if a forced air continuous freeze is used, the temperature of the cooling medium is also related to the frosting speed of the evaporator. That is, when the evaporating frost layer reaches a certain thickness, the temperature of the cooling medium is correspondingly increased due to a decrease in the heat transfer effect. Therefore, in order to ensure the quality of the frozen, it should be done in time to defrost.

Second, the effect of air flow rate

នៅក្រោមដំណើរការត្រជាក់ IQF អត្រាលំហូរខ្យល់គឺជាកត្តាចម្បងដែលប៉ះពាល់ដល់តម្លៃនៃមេគុណ exothermic ។ ដូច្នេះការកើនឡើងសមស្របនៃអត្រាលំហូរខ្យល់អាចបង្កើនកម្រិតនៃការបញ្ចប់ត្រជាក់។ ជាឧទាហរណ៍ សណ្តែកបៃតងធម្មតាបង្កកក្នុងខ្យល់ឋិតិវន្តនៃ -30°C ដែលចំណាយពេលប្រហែល 2 ម៉ោង។ នៅសីតុណ្ហភាពដូចគ្នា អត្រាលំហូរខ្យល់កើនឡើងដល់ 4.5-5 m/s ហើយរយៈពេលត្រជាក់គឺត្រឹមតែ 10 នាទីប៉ុណ្ណោះ។

នៅក្រោមលក្ខខណ្ឌជាក់លាក់ ការផ្លាស់ប្តូររវាងល្បឿនត្រជាក់ និងអត្រាលំហូរខ្យល់មិនមានលក្ខណៈលីនេអ៊ែរទេ ដូច្នេះអត្រាលំហូរខ្យល់គួរតែត្រូវបានកំណត់យ៉ាងទូលំទូលាយតាមទស្សនៈសេដ្ឋកិច្ច។

Third, the effect of freezing termination temperature

The freezing termination temperature is lower than the storage temperature (-18 ° C), which is beneficial to maintain the structure under rapid freezing. If the freezing termination temperature is higher than -18 °C, the unfrozen water inside the vegetable tissue will generate large ice crystals, which will result in the destruction of the tissue structure and the increase of juice loss during thawing, which will affect the nutritional value and flavor of the product. If you are interested in learning more about freezing IQF, please click gf-machine