Thermal and Humidity Control Chamber Frame Structure and Operation Principle

Cooling

The refrigeration system is one of the key components of the comprehensive test chamber. Generally, the cooling methods for climate-controlled humidity chambers are mechanical refrigeration and auxiliary liquid nitrogen refrigeration. The price of a rain test chamber, mechanical refrigeration uses vapor compression refrigeration, which is mainly composed of compressors, condensers, throttling devices, and evaporators. If the test temperature needs to reach -60°C, a single-stage refrigeration is insufficient to meet the requirements. The refrigeration method for Suzhou Xinhui Bao climate-controlled humidity chambers typically employs cascade refrigeration. The refrigeration system of a climate-controlled humidity chamber consists of two parts, known as the high-temperature section and the low-temperature section, each being a relatively independent refrigeration system. In the high-temperature section, the refrigerant evaporates and absorbs heat from the refrigerant of the low-temperature section to vaporize; in the low-temperature section, the refrigerant evaporates by absorbing heat from the cooled object (air inside the test chamber) to obtain cooling. The high-temperature and low-temperature sections are connected by an evaporative condenser, which serves as both the condenser for the high-temperature section and the condenser for the low-temperature section.

Maintenance Tips for Constant Temperature and Humidity Chambers

1. The cooling system (condenser) of the refrigeration unit should be regularly maintained and kept clean. Dust and adhesive on the condenser can cause the compressor's high-pressure switch to trip and generate false alarms. The condenser should be maintained monthly, using a vacuum cleaner to remove dust from the condenser's cooling fins, or brushing with a stiff brush after the unit is turned on, or using a high-pressure nozzle to blow away the dust. 2. When opening or closing doors or removing test items from the furnace, do not allow the item number door's rubber edge to touch, to prevent damage to the rubber edge and to extend its lifespan. 3. The surrounding area and the ground at the bottom of the constant temperature and humidity chamber should be kept clean at all times to prevent a large amount of dust from being吸入 the unit, which could cause accidents and reduce performance.

The sprayer's flow rate can be adjusted by changing the size of the sprayer tower cap and the inlet pressure. It can adjust the inlet pressure by opening the pressure-reducing valve on the oil-gas separator. The spray booth manufacturer's specifications, the sprayer pressure is generally between 0.7~2.0 Kg/cm². In terms of the specifications of the salt spray test chamber during operation, the price of the spray booth, when selecting personal studio specifications, it can be chosen based on the customer's initial test sample specifications. Nowadays, most salt spray test chambers use high-tensile, corrosion-resistant PVC plastic sheets, which have a smooth and flat surface, are resistant to aging and corrosion, easy to clean, and leak-proof. Materials like glass fiber reinforced plastic and stainless steel sheets have been discarded. Glass fiber reinforced plastic was already phased out over a decade ago, and stainless steel sheets cannot withstand long-term corrosion tests.



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