Rapid Temperature Change Test Chamber

Product application:
The rapid temperature change test chamber is suitable for testing various performance indicators of aerospace products, information electronics, instruments, materials, electrical appliances, electronic products, and electronic components under high and low temperature or humid and hot environments.

These test chambers are designed to simulate extreme temperature conditions to evaluate how these products and materials will react under such circumstances, ensuring their reliability and durability for use in demanding applications.

Compliance with standards:
This product complies with the national standard GB2423.22-2001 "Temperature Change Test Method";

as well as other relevant standards. It is manufactured strictly in accordance with GB 10592-89 "Technical Specifications for High and Low Temperature Test Chambers".

Chamber structure:
The rapid temperature change test chamber is manufactured using CNC machining, resulting in an aesthetically pleasing and substantial design. It features non-reactive handles that simplify operation.

The interior of the chamber is lined with high-grade imported stainless steel (SUS304) mirror panels, while the exterior is crafted from A3 steel plates with a spray plastic coating, enhancing both the visual texture and cleanliness.

The water supply tank is located at the lower right side of the control box, equipped with an automatic water shortage protection feature that facilitates easier water replenishment for the operator.

A large observation window with a lighting fixture ensures the interior remains well-lit, and the use of embedded tempered glass within the heating element allows for clear observation of the chamber's conditions at any time.

The humidification system's piping is separated from the control circuit board to prevent malfunctions due to water leakage from the humidification piping, thereby enhancing safety.

The water and electrical systems are designed with door-like openings for easy maintenance and repair.

A double-layer, high-temperature resistant, high-tension sealing strip is used between the door and the chamber body to ensure the airtightness of the test area.

There is a cable port (on the left side of the machine) for external test power cables or signal cables (with diameters of 25mm, 50mm, or 100mm). (The diameter or number of ports must be specified when ordering).

The machine is equipped with high-quality, fixed casters made of PU (polyurethane) at the bottom for stability and ease of movement.

Control system:
The refrigeration system and compressor of the rapid temperature change test chamber: To ensure the cooling rate and the requirement for the lowest temperature of the test chamber,this product uses a dual-stage cascade air-cooled refrigeration system composed of a set of Tecumseh fully enclosed compressors.

The cascade refrigeration system includes a high-temperature refrigeration cycle and a low-temperature refrigeration cycle, with the connecting vessel being the evaporative condenser, which also serves the purpose of energy transfer, transferring the heat energy inside the working chamber through the two-stage refrigeration system to achieve the goal of cooling.

The design of the refrigeration system applies energy regulation technology, a proven and effective method that can ensure the normal operation of the refrigeration unit while effectively regulating the energy consumption and cooling capacity of the refrigeration system, reducing the operating costs and failure rates of the refrigeration system to a more economical state.

Refrigerants: DUPONT's R404 (high-temperature cycle) and R23 (low-temperature cycle) are used.

Accessories: Expansion valve (Danfoss from Denmark), solenoid valve (Castel from Italy); filter (Arico from the USA); oil separator (GuanYa from Taiwan), and other refrigeration accessories are all imported components.

Refrigeration system:
The rapid temperature change test chamber employs the reverse Carnot cycle for both high and low temperature refrigeration cycles, which consists of two isothermal processes and two adiabatic processes. Here is the process:

1. The refrigerant is adiabatically compressed by the compressor to a higher pressure, which consumes work and increases the discharge temperature.

2. The refrigerant then undergoes an isothermal heat exchange with the surrounding medium through the condenser, transferring heat to the surrounding medium.

3. Afterward, the refrigerant expands adiabatically through the expansion valve, doing work and causing its temperature to decrease.

4. Finally, the refrigerant absorbs heat isothermally from the warmer object through the evaporator, which lowers the temperature of the object being cooled.

This cycle repeats continuously, achieving the purpose of cooling.