walk in temperature humidity test chamber provide stable and reliable testing environments for various industries, precisely simulating temperature and humidity conditions. Whether you are conducting product development, quality inspection, or long-term storage, our walk-in test chambers can meet your needs. Each device is customized for customers to ensure it meets specific requirements and promotes the improvement of product performance.
The test samples are prohibited from the following types:
1、Testing and storage of samples of flammable, explosive and volatile substances
2、Testing and storage of corrosive substance samples
3、Testing or storage of biological samples
4、Testing and storage of samples from strong electromagnetic emission sources
5、Testing and storage of radioactive substance samples
6、Testing and storage of highly toxic substance samples
7、Testing and storage of samples that may produce highly toxic substances during the testing or storage process.
Air conditioning system
- Working principle: Forced ventilation internal circulation, balanced temperature regulation method, that is, the central control system amplifies the collected temperature signal inside the box, performs analog-to-digital conversion, and performs nonlinearity correction before comparing it with the set value (target value) of the temperature. The deviation signal obtained is processed by PID operation and outputs a regulation signal to automatically control the output power of the heater/humidifier. To achieve a dynamic balance between heating and heat dissipation in the test chamber, and ultimately reach the purpose of constant temperature;
- Air circulation device: Extended shaft centrifugal fan, driven by an external motor on the long shaft;
- Air heating method: A dedicated helical nickel-chromium alloy resistive electric heater with a large heat dissipation area is adopted. PID+SSR drive control
- Air cooling method: High-efficiency diaphragm air heat exchanger.
Refrigeration system
- The low-temperature connection pipelines adopt high-quality oxygen-free copper tubes, nitrogen-filled welding, and high-pressure-holding anti-leakage processes to ensure the welding quality. The length, inclination, slope and direction of the pipeline must all be strictly calculated to achieve the best cooling effect.
- Main refrigeration components:
Refrigeration compressor: It adopts an original imported low-noise scroll cascade mechanical refrigeration system. This model of compressor features large cooling capacity, low noise, low energy consumption and high efficiency. This equipment adopts the German Blog refrigeration compressor unit and should be able to ensure long-term, stable and reliable operation.
Refrigeration evaporator: The finned evaporator is adopted, which has a 30% higher heat exchange efficiency than the common evaporator. It has the advantages of being beautiful, compact and having a fast cooling effect.
Oil separator and refrigeration oil: Whether the refrigeration compressor has sufficient, reasonable and high-quality refrigeration oil will directly affect its service life. If the refrigeration oil enters the refrigeration system, especially the heat exchangers, its performance will be greatly reduced. For this purpose, an oil separator is set up in the system. The best-performing imported oil separator and freezer are adopted, and the oil performance and viscosity are the most stable.
High-efficiency condensing evaporator It adopts the most advanced brazed plate heat exchanger in the world at present. This heat exchanger is composed of several corrosion-resistant stainless steel sheets pressed into human wave-shaped corrugations. The corrugation directions of adjacent pairs of stainless steel sheets are opposite, and the corrugation backlines intersect with each other to form a large number of contact welding points. Due to the complex contact intersection network channel, the fluids on both sides form turbulence, which improves the heat exchange intensity. At the same time, the intense turbulence and smooth stainless steel surface make the inner surface of the flow channel of the brazed plate heat exchange less prone to scaling. After adopting this heat exchanger, not only is the system resistance reduced, but also the shortcomings of this component in previous domestic large-scale low-temperature test chambers, such as large size, poor heat exchange, and low efficiency, can be overcome. - Cooling method: Air-cooled
- Refrigerant: R404A complies with the requirements of international environmental protection conventions.
Standard configuration of the test chamber
Fans, heaters, evaporators, drainage devices
Humidifier, dry-burning preventer, wet bulb temperature sensor, wet bulb water tank
Lead holes: 2 with a diameter of φ100mm, located at the center of the inner box side wall
Double open gates; (Can be selected as needed)
Two electrically heated (automatically adjustable) anti-frosting and anti-condensation double-glazed observation Windows are installed on the door
The door frame is equipped with an electric heating (automatically adjustable) anti-frosting and anti-condensation device
There is a high-efficiency and long-life box lighting lamp on the door.
Control panel
Controller display screen
Operation buttons, over-temperature protection setting device
232# USB Interface (optional)
Mechanical room machine
The mechanical room contains: refrigeration unit, automatic water connection and drainage device, fan, power distribution control cabinet, humidification and moisture measurement water control device
Power distribution control cabinet
Cooling fan, buzzer, distribution board, RS-485, RJ-45 Ethernet physical interface (needs to be purchased together with the centralized monitoring software), main power leakage circuit breaker.
Refrigerant
The controller digitally displays the high and low pressure of the refrigeration system, exhaust temperature and the operating current of the compressor
R404a/R23 (Ozone depletion index is 0 for both)
The main components are all made of high-quality international brand products.
Ancillary functions
Fault alarm and cause, handling prompt function
Power-off protection function
Upper and lower limit temperature protection function
Calendar timing function (automatic start and automatic stop operation), self-diagnostic function
Derui is an innovative enterprise dedicated to the research and development, production and service of environmental test chamber equipment, committed to providing global customers with high-precision and highly reliable environmental simulation testing solutions. The company's core products include high and low temperature test chambers, humidity and temperature test chambers, temperature shock test chambers, rapid temperature change test chambers, etc., which are widely used in the fields of automobiles, electronics, aerospace, new energy, materials research, etc.
With advanced R&D capabilities, strict production processes and a complete quality control system, Derui Equipment is renowned for its precise temperature control, stable operation and intelligent operation, meeting the requirements of international and industry standards such as ISO, GB and IEC. The company adheres to a customer-oriented approach, providing full-service from pre-sale consultation, customized solutions to after-sale technical support, helping enterprises enhance product reliability and market competitiveness.
