Technical standards and selection principles of explosion-proof chillers

Technical standards and selection principles of explosion-proof chillers

Explosion-proof water chillers are specific explosion-proof measures based on standard water chillers to prevent electrical equipment from igniting the surrounding explosive gas environment. The explosion-proof chiller unit is an integral explosion-proof system. In addition to considering the explosion-proof performance of all electrical components, the overall explosion-proof performance of the unit must also be considered to meet the standard requirements. Explosion-proof chillers provide a comfortable and safe production environment for people in explosion-hazardous places. However, in addition to the performance of the product itself, the safety guarantee depends on reasonable selection, correct use and maintenance.

　　The selection principle of explosion-proof chiller and refrigeration equipment system:

　　Explosion-proof chiller refrigeration equipment system can generally be selected according to specific requirements such as safety performance, use environment, and engineering cost.

　　 1. The basic principle of choosing from the aspect of safety performance:

　　 1. Products with perfect and reliable explosion-proof performance should be selected. Protection technologies such as anti-static, temperature limit, and voltage limit must be perfected. In particular, the explosion-proof structure must comply with relevant standards to ensure safe use.

　　2, it should be preferred under the same price.

　　3, C-level air-conditioning products can improve the reliability of explosion-proof.

　　4. The air-conditioning system with the "air-tight type" and "positive pressure type" composite explosion-proof structure refrigeration system should be selected first. This type of air-conditioning system can be used in Zone 1, with good explosion-proof reliability.

　　 Two. Some principles to choose from the use environment:

　　 1, 1 and 2 hazardous areas shall adopt the air-conditioning system with "air-tight" and "positive pressure" composite explosion-proof structure or air-tight enclosure and "positive pressure" explosion-proof structure refrigeration system. Air conditioners with "air-tight" explosion-proof structure refrigeration systems can generally only be used in zone 2.

　　2. There is no dangerous space with ventilation, because there is the possibility of local 0 zone, in order to ensure safety, an indoor unit with compound 0 zone explosion-proof requirements must be used. It is best to use a fresh air air conditioning system that meets the above requirements.

　　3, F1, F2 dust hazard environment and fire explosion and dust hazard environment, in general, a fresh air air conditioning system with fans not in contact with dust should be adopted. At the same time, measures must be taken to prevent dust from accumulating in the air duct; the air supply and exhaust systems of each space unit should be independent of each other to ensure safety.

　　 Three, the characteristics of the explosion-proof chiller:

　　1. The compressor of the explosion-proof chiller is a professional explosion-proof compressor of Taiwan Hanbell brand. The screw compressor series is not only explosion-proof, but also can be used for four-stage capacity adjustment to save energy and electricity.

　　2. Select the American Bangpu microcomputer control panel, you can clearly see the operation of the unit, you can also adjust the temperature control according to the cooling demand, and more clearly follow the fault prompts on the control surface to eliminate the unit failure.

　　3. The use of South Korea’s LG explosion-proof electric control system and Omron explosion-proof electrical accessories can protect the chiller from other interference and work safely and stably.

4. The shell and tube evaporator and condenser produced by the factory not only have sufficient heat exchange area, but the externally threaded copper tube makes the two devices have good airtightness, strong heat exchange capacity, and better continuous heat dissipation and heat exchange cycle, which is stable Explosion-proof chiller to cooling efficiency.

5. Explosion-proof chillers are the same as ordinary chillers, equipped with various protection measures, such as phase loss and reverse protection, compressor overload/delay protection, high pressure/low pressure protection, automatic warning protection for water shortage, and low temperature/anti-junction Ice protection and more