Understanding the refrigeration system is essential when it comes to high and low temperature test chambers, as it is the core component that determines the performance and efficiency of these devices. Many people have questions about how refrigeration systems work in such equipment. This chapter provides a detailed explanation of the refrigeration system used in high and low temperature test chambers. In single-stage refrigeration cycles used in these test chambers, R404A is commonly used as the refrigerant. The evaporation temperature of R404A at atmospheric pressure is -46.5°C. However, due to the typical heat transfer temperature difference of air-cooled condensers, which is around 10°C, the lowest temperature achievable inside the chamber is usually -36.5°C. If lower temperatures are required for specific testing purposes, the evaporation pressure can be reduced, allowing the evaporation temperature to drop as low as -50°C. It’s important to note that for any refrigerant, a lower evaporation temperature corresponds to a lower evaporation pressure. When the evaporation temperature becomes too low, some common refrigerants may reach their freezing point, making it impossible for the refrigerant to flow properly and complete the cycle. Additionally, as the evaporation pressure decreases, the volume of the refrigerant increases, leading to a reduction in mass flow rate. To maintain the required cooling capacity, the suction volume must be increased, which often results in a larger compressor size. The refrigeration system in high and low temperature test chambers not only cools but also dehumidifies the environment inside the chamber. This same system can allow the equipment to operate in two different modes. Users can customize parameters and test methods according to their needs, ensuring the system is used efficiently. The operation manual or instructional videos provided by Shanghai Shangyu make it easy for users to understand and operate the system effectively. Proper understanding and maintenance of the refrigeration system are crucial for achieving accurate and reliable test results. Whether you're conducting thermal stress tests or evaluating product performance under extreme conditions, a well-designed and maintained refrigeration system plays a vital role in the overall functionality of the test chamber. These perfume sample bottles are made of glass, non-toxic, health, reusable and durable. 1ml perfume sample bottle,small perfume tester bottle,2ml glass perfume sample vials,sample perfume bottle,perfume container bottle for 1ml NANTONG OUFEIYA IMP& EXP CO.,LTD , https://www.nantongoufeiya.com
The perfume sample bottle is small and lightweight, you can easy to carry, such as bag, purse or pocket, and use it anywhere and anytime.
This sample vial bottle is refillable and easy to fill. Simply unplug the clear cap, inject the essential oil, perfume or other liquids, and cover it.
Perfect for essential oils, perfume, aromatherapy, fragrance, eye serum, facial serum, or other liquids. And great for travel, home use, creating yourself aromatherapy blends, sample, gift and more.