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The rapid temperature change test chamber http://www.dtech-china.com/ increases the speed of temperature rise and fall compared to ordinary high and low temperature test chambers. It is specially designed to meet the needs for rapid temperature change tests by customers, featuring a rational structural design, an optimized cooling system, and a sophisticated internal control mechanism that enables linear or nonlinear temperature changes at rates of 5 degrees per minute, 10 degrees per minute, or 15 degrees per minute. Structure of the rapid temperature change test chamber: The chamber is constructed from laboratory-grade steel panels, featuring elegant and simple design lines. The outer shell is made of electrostatically sprayed off-white laboratory steel plates (1.0 mm thick); customizations can be made to meet specific requirements. The inner shell is made of SUS304 stainless steel plates (1.0 mm thick, with full welding), ensuring a smooth and durable surface. The middle layer consists of 100 mm thick polyurethane insulation material. The door features a double-door design, with the joints sealed together by silicone strips, ensuring excellent sealing. Hollow tempered glass has been installed at the center of each side of the door, allowing for a clear view of the products being tested inside the chamber. The chamber consists of a heating system, a cooling device, and a control mechanism; that is, there is a forced circulation air duct in the laboratory, along with a heater located inside the duct, whose energy is discharged through a centrifugal fan. Furthermore, cooling and heating prevent direct human contact, serving to enhance aesthetics and provide protection. Control mechanism: On the front and side surfaces of this chamber, there are power distribution control cabinets, smart meters, power buttons, lighting switches, as well as corresponding alarm indication devices. The control cabinets are equipped with electrical control and protection devices; the sensors used are A-grade Pt100 platinum resistance sensors, which offer high precision and accuracy. Observation device: The double-door section of this laboratory is equipped with an observation window; the exact size of the window will be determined later (note: it can be adjusted according to the actual requirements). The observation window is made of hollow tempered glass and features defrosting and heat-conducting functions. Cable testing hole: Diameter (50mm). Indoor lighting: High-temperature and explosion-proof lighting fixtures are installed on the ceiling of the test chamber, providing sufficient light in every corner of the chamber ； Internal ventilation: equipped with multiple stainless steel axial fan units. The drive fan facilitates forced air circulation through the air ducts, thereby achieving the best possible temperature uniformity in the laboratory ； The design of refrigeration systems should include energy regulation technology; an effective approach that ensures the normal operation of the refrigeration unit while simultaneously allowing for effective control over the system’s energy consumption and cooling capacity, thereby reducing the operating costs and failure rate of the refrigeration system to more economical levels ； Refrigeration auxiliary components: water-cooled coil condensers and fin-type multi-stage evaporators. All the main refrigeration components and control devices are imported, such as the Danfoss thermal expansion valves from Denmark and the Airex dry filters from the United States ； Italian “Casto” solenoid valve ； Refrigerant: Refrigerant 404A (low-pressure cycle) single-stage/R23 (high-pressure cycle) cascade ； Cooling method: Air cooling ； Vibration reduction and noise suppression: Measures for vibration reduction and noise suppression in refrigeration system ； Precautions during the use of the rapid temperature change test chamber: 1. If it is difficult to rotate the rubber plug of the air release valve, apply an appropriate amount of grease to it for lubrication ； 2. When using the test chamber, it is essential to ensure proper and secure grounding to prevent static electricity induction ； 3. When the test chamber has completed its low-temperature operation, it should be dried at a temperature of 60°C for about 30 minutes before the door is opened, in order to avoid affecting the measurement times during subsequent tests or causing the evaporator to freeze ； 4. The installation position of the wet-ball gauze must be accurate in order to measure the correct relative humidity ； Do not touch the enclosure while it is in operation to avoid electric shock or injury from the fan, which could pose a danger ； 5. Protective devices such as circuit breakers and over-temperature protectors, which are designed to safeguard the test items as well as the safety of the operators, must be regularly and thoroughly inspected during experiments in rapid temperature and humidity change test chambers ； 6. Unless it is absolutely necessary to open the door, do not open it casually, as this may lead to adverse consequences: the inside of the door remains at a high temperature, and the hot air could trigger a fire alarm, causing errors. Air from the rapid temperature and humidity change test chamber may escape outside the chamber, and opening and closing the chamber during the experiment can cause damage to the compressor. Unless required by the test, customers are not advised to open and close the chamber frequently during the experiment.