Rapid Temperature Change Test Chamber

Product Name

Rapid temperature change test chamber / fast rate-of-change test chamber

Application

The rapid temperature change test chamber is suitable for aerospace products, information and electronic instruments, materials, electrical and electronic products and various electronic components, to test their performance indicators under high/low temperature or damp heat environments.

Chamber Structure

• Overall forming: the chamber body is CNC-machined with an attractive, generous appearance, and uses non-reactive handles for easy operation.
• Inner chamber material: the inner chamber is made of imported high-grade stainless steel (SUS304) mirror plate; the outer shell is A3 steel plate with powder coating, enhancing the appearance and cleanliness.
• Water replenishment tank: placed at the lower right of the control cabinet, with automatic water-shortage protection, making it more convenient for the operator to replenish the water supply.
• Observation window: a large observation window with lighting keeps the chamber interior bright, and laminated tempered glass with embedded heating elements allows clear observation of the chamber interior at any time.
• Humidification system: the piping is separated from the control circuit board, avoiding failures caused by humidification pipe leakage and improving safety.
• Water system: the piping and electrical systems open with hinged doors for easy maintenance and inspection.
• Sealing structure: double-layer high-temperature-resistant high-tensile sealing strips between the door and the chamber ensure a tightly sealed test area.
• Cable entry ports: the left side of the machine allows external connection of test power supply or signal cables (diameter 25mm, 50mm or 100mm). Specify when ordering if a larger diameter or more ports are required.
• Casters: the machine bottom uses high-quality lockable PU casters.

Refrigeration System

Refrigeration system and compressor of the rapid temperature change test chamber: to meet the cooling-rate and minimum-temperature requirements, the chamber adopts a two-stage cascade air-cooled refrigeration system composed of Tecumseh fully hermetic compressors. The cascade refrigeration system includes a high-temperature refrigeration circuit and a low-temperature refrigeration circuit; the connecting vessel is the evaporative condenser, which also serves as an energy-transfer device, carrying heat from the working chamber out through the two-stage refrigeration system to achieve cooling. The refrigeration system design applies energy-regulation technology, an effective approach that ensures normal operation of the refrigeration unit while effectively regulating energy consumption and cooling capacity, bringing the operating cost and failure rate of the refrigeration system down to a more economical level.

• Refrigerant: DUPONT R404 (high-temperature circuit) and R23 (low-temperature circuit).
• Auxiliary components: expansion valve (Danfoss, Denmark), solenoid valve (Italy CASTEL).
• Refrigeration accessories: filter (US ALCO), oil separator (Taiwan Guanya), etc. are all imported parts.

Refrigeration Principle

The rapid temperature change test chamber uses the reverse Carnot cycle for both the high- and low-temperature circuits; the cycle consists of two isothermal processes and two adiabatic processes. The process is as follows: the refrigerant is adiabatically compressed by the compressor to a higher pressure, with work consumed raising the discharge temperature; the refrigerant then exchanges heat isothermally with the surrounding medium through the condenser, transferring heat to the surroundings; the refrigerant then does work through adiabatic expansion via the valve, and its temperature drops; finally the refrigerant absorbs heat isothermally through the evaporator from warmer objects, lowering the temperature of the cooled objects. This cycle repeats continuously to achieve cooling.