Temperature shock test chamber refrigeration system

1. Refrigeration system and compressor: In order to ensure the cooling rate of the test chamber and the minimum temperature requirements, the temperature shock test chamber adopts a binary cascade water-cooled refrigeration system composed of a set of imported German semi-hermetic compressors (need to be installed outdoors The circulating cooling water tower with 10 tons of cooling water per hour is provided by the user). The cascade cold system consists of a high temperature refrigeration cycle and a low temperature refrigeration cycle. The connecting container is an evaporative condenser. The evaporative condenser also plays a role in energy transfer. The heat energy in the working chamber is transferred out through the two-stage refrigeration system to achieve high temperature. the goal of. The design of the refrigeration system applies energy adjustment technology. An effective treatment method can ensure that the energy consumption and cooling capacity of the refrigeration system can be effectively adjusted under the normal operation of the refrigeration unit, so as to reduce the operating cost of the refrigeration system. And the failure rate drops to a more economical state.
2. The working principle of refrigeration: Both high and low refrigeration cycles adopt reverse Karuo cycle, which consists of two isothermal processes and two adiabatic processes. The process is as follows: the refrigerant is adiabaticly compressed by the compressor to a higher pressure, and the work is consumed to increase the temperature of the exhaust gas. After that, the refrigerant exchanges heat with the surrounding medium through the condenser isothermally, and transfers the heat to the surrounding medium. After the refrigerant expands through the valve adiabaticly to do work, the temperature of the refrigerant decreases. After zui, the refrigerant absorbs heat isothermally from the higher temperature object through the evaporator, so that the temperature of the cooled object is lowered. This cycle repeats itself to achieve the purpose of cooling down.
3. Refrigerant: adopt DUPONT company R404A (high temperature cycle), R23 (low temperature cycle);
4. Auxiliary parts: expansion valve (USA SPORLAN), solenoid valve (Italy CAS); filter (USA SPORLAN); pressure controller (British American RANCO); oil separator (European and American ALCO) and other refrigeration accessories are imported.
5. Thermal shock test chamber, equipped with automatic and manual defrosting circuits
6. U-TYPE eel sheet type high-speed heating electric heating tube
7. Internal spiral K-TYPE refrigerant copper pipe
8. *Electricity-saving rate compressor (using German "Copeland" water-cooled compressor)
9. Slope type FIN-TUBE evaporator
10. *Solenoid valve, filter drier, capillary and other freezing components;
11. Adopt air-cooled condenser;
12. The refrigerant uses high-stability R404 and R23 environmentally friendly refrigerants;
13. The refrigeration system adopts binary refrigeration (cascade type) to be fast and stable;
14. Multi-wing circulating fans are used in the heat storage area and cold storage area to force air convection to improve the uniform temperature effect.
15. Both the cold and hot zone and the test zone adopt PID+SSR microcomputer to control the temperature, and the automatic calculation can achieve the control accuracy.