Three functions of High And Low Temperature Humidity Chamber

The High and Low Temperature Humidity Chamber is a kind of testing mechanical instrument used to test the extent of endurance of material structure and composite materials under the continuous environment of extremely low temperature or extremely high temperature, and to test the chemical change damage caused by thermal expansion and contraction.

1. Cooling function:
The compressor of the High and Low Temperature Humidity Chamber is the cardiovascular system of the refrigeration system. The test instrument inhales the low temperature and low pressure gas, which becomes the high temperature and high pressure gas, and then condenses to form the liquid, and releases the heat, which is carried away by the fan of the instrument. So the hot air factor is below the instrument, and then flows to the low pressure liquid through throttling, so it also becomes the low temperature and low pressure gas through the evaporator and returns to the compressor.

2. Humidity reduction and humidification function:
The refrigeration system is completed by the factors that determine the dehumidification system. The evaporator is placed in the high and low temperature humidity and heat test chamber. Because it is relatively cold, the high humidity gas in the equipment will become liquid when it sees the condensation of cold objects. After such repetition, the high humidity gas in the equipment box will become less, so as to achieve the purpose of dehumidification.

3. Heating function:
The heating setting is one of the keys to control the temperature rise of the high and low temperature damp heat test box. When the controller receives the temperature rise indication, it will output the voltage to the relay. About 3-12 V DC will be applied to the top of the solid-state relay. The AC end of the equipment is equal to the wire connection. At the same time, the contactor will also be closed. There is also voltage on both sides of the heater to make it hot, and the heat will be driven into the box by the circulating fan, Make the instrument warm up, so the temperature quickly reaches the preset value set by the customer.

Six factors of large temperature deviation in High and Low Temperature Humidity Chamber:
1. The difference between the detection objectives in the High and Low Temperature Humidity Chamber: if the equipment is placed in the box enough to affect the overall inside, the uniformity of the temperature inside the chamber (that is, the temperature uniformity) will be affected to a certain level when the equipment detects the samples for convective heat transfer. If there is a product that can emit light and heat as the heat load, it will cause a great impact on the temperature uniformity. In addition, products with high temperature specific heat capacity will also lead to excessive errors in equipment, such as aluminum.

2. Because the structure of each equipment is different, the temperature of the inner wall of the detection chamber will also be unstable, which will affect the flow of gas and cause temperature imbalance.

3. The difficulties in the internal structure and interior space design of the test chamber will also affect the uneven temperature of the equipment. In this standard, the key reflection of the sheet metal design and processing plant, such as the design of the ventilation outlet, the location of the heating pipe and the output efficiency of the centrifugal fan, will affect the temperature uniformity in the small chamber in the chamber.

4. The door of the High and Low Temperature Humidity Chamber is not tightly closed, such as air leakage of the door seal, and the sealant strip is not set to the joint opening. These will affect the temperature uniformity of the indoor space of the equipment in the work.

5. Because the thermal conductivity of the surface layer around the six sides of the chamber wall of the personal equipment is different, some have inspection holes, inspection holes, etc. This will cause uneven temperature of the chamber, and affect the radiation source of the test box, thus affecting the temperature uniformity.

6. If the volume of the test sample is large, or the test sample is placed in the working operation of the test chamber, the temperature in the chamber is not suitable for the place or method, or the air convection in the chamber will be blocked and separated, which will also lead to greater deviation of temperature uniformity.

Temperature Humidity Chamber | Thermal Chamber | Climate Chamber is according to IEC60068-2-1 (GB/T2423.1) and IEC60068-2-2 (GB/T2423.2), IEC60068-2-78, IEC60598-1, GB/T2423.17, GB/T5170.2, GB/T5170.5. The climate chamber is used to test the CFL/LED which meets IES LM-80-08, electricity products, automative cars, home appications and mobiles.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

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