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Cold and hot shock test chamber, temperature shock test chamber, principle of test chamber
Cold and hot shock test chamber, temperature shock test chamber, principle of test chamber
Product details
Introduction to the structure of the cold and hot (temperature) impact test box:
(1) All functions are controlled by a computer and are independently developed software with a user-friendly interface, making user operation and monitoring simpler and more intuitive. The hold function allows you to keep the running program in its current state, temporarily change the value of this program segment, set time parameters on the screen, and switch between cooling, heating, and blue transfer automatically according to the set values.
(2) The cold box and hot box are independently controlled, and the box doors are independent of each other, expanding the scope of use of the test box (one box for three purposes). The insulation effect of the product can be fully guaranteed
(2) The door of the cold and hot shock test chamber is interlocked with the circulating fan, lifting blue drive, etc. to protect the safety of the operator. Once the door is opened, the power supply of the circulating fan and lifting blue drive will be automatically cut off. There are standard lead hole tubes on the top of the box, which facilitate users to introduce sensor wires, detect cables and other types of leads into the box.
The main controller adopts the imported Japanese "OYO" dual circuit high-precision LCD display touch button temperature controller. The controller adopts a liquid crystal display touch screen, which can display set parameters, test curves, running time, heater working status, and PID parameter self-tuning function. The programming of the control program adopts a human-machine dialogue method, which only requires setting the temperature to achieve the automatic operation function of the refrigeration machine. The control system has a complete detection device that can automatically display detailed faults. Alarm, configure 485 communication interface and run software. Setting accuracy: Temperature: 0.1 ℃ Time: Is User program capacity: 10 × 99 segments. Running mode: Program running, constant running. Independent over temperature protection instrument. Accumulated timer for device working time. The transition time between low-temperature and high-temperature zones is less than or equal to 15 seconds. Temperature recovery time is less than or equal to 5 minutes
Cold and hot (temperature) shock test chamber refrigeration system:
RTE Two Box Cold Shock Refrigeration System and Compressor: In order to ensure the cooling rate and low temperature requirements of the test chamber, this test chamber adopts a binary stacked air-cooled refrigeration system composed of an imported French fully enclosed compressor. The stacked refrigeration system consists of a high-temperature refrigeration cycle and a low-temperature refrigeration cycle, with the connecting container being an evaporative condenser. The evaporative condenser also serves as an energy transfer device, transferring the thermal energy inside the working chamber through a two-stage refrigeration system to achieve the goal of high temperature. The design of the refrigeration system applies energy regulation technology, which is an effective way to ensure the normal operation of the refrigeration unit while effectively adjusting the energy consumption and cooling capacity of the refrigeration system, reducing the operating costs and failure rate of the refrigeration system to a more economical state.
Principle of refrigeration test for cold and hot (temperature) shock test chamber:
Both high and low refrigeration cycles use reverse Caryol cycles, which consist of two isothermal processes and two adiabatic processes. The process is as follows: the refrigerant is adiabatically compressed to a higher pressure by the compressor, consuming work to increase the exhaust temperature. Then, the refrigerant exchanges heat with the surrounding medium through the condenser at an isothermal state, transferring heat to the surrounding medium. After the refrigerant undergoes adiabatic expansion through the valve, the temperature of the refrigerant decreases. *The refrigerant absorbs heat from objects with higher temperatures through the evaporator, causing the temperature of the cooled object to decrease. This cycle repeats itself to achieve the goal of cooling down.
Auxiliary components: Expansion valve (SPORLAN, USA), solenoid valve (CASTEL, Italy); Filter (SPORLAN, USA); Pressure controller (RANCO, UK and US); Imported parts are used for refrigeration components such as oil separators (European and American ALCO)
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