Industrial explosion-proof air conditioning is mainly used for cooling and heating in flammable and explosive environments such as petroleum, chemical, oil depots, and offshore oil platforms. The appearance and usage of explosion-proof air conditioning are the same as ordinary air conditioning. According to the working environment, explosion-proof air conditioning can be divided into high temperature, low temperature, ultra-high temperature, and ultra-low temperature.

Industrial explosion-proof air conditioning is mainly suitable for places with explosive gases or vapors, and various hazardous gases and vapors are often encountered in chemical production. In places with these media, appropriate explosion-proof electrical appliances should be selected correctly according to relevant specifications, standards, and regulations to prevent explosive mixtures from exploding in the surrounding area. It is an important measure to prevent fires or explosions. To avoid misuse, explosion-proof electrical appliances usually require corresponding explosion-proof signs and technical information.

Hanging explosion-proof air conditioner

Industrial explosion-proof air conditioning consists of an indoor unit and an outdoor unit.

Air intake: The air in the room is sucked in, and dust is discharged through an air filter.

Air outlet: The adjusted air is blown out from here.

Drainage pipe: The water in the room is discharged through the drainage pipe after small water droplets are generated in the condenser.

Connecting pipes: The indoor and outdoor units are connected by copper pipes, allowing the cooling medium to flow.

Outdoor unit: The outdoor unit consists of electrical components such as a compressor, fan, heat exchanger, and capillary tube.

Temperature control switch for heat pump air conditioning: mainly used to control the power switch, select cooling and heating, adjust the set temperature, and control the indoor temperature.

Working principle of explosion-proof air conditioning:

When operating under refrigeration conditions, the three-way valve opens the component. At this point, the indoor heat exchanger will quickly transform into an evaporator, while the outdoor heat exchanger will transform into a condenser. The low temperature and low pressure generated by the indoor heat exchanger enter the gas-liquid separator after passing through the hot gas through the four-way valve and muffler. After separation, the hot gas will be sucked in by the compressor and then compressed into high-temperature and high-pressure gas. The gas will then enter the outdoor heat exchanger through a four-way valve to release condensation and become subcooled liquid. After the capillary resistance is reduced in pressure, the supercooled liquid becomes a low-temperature and low-pressure two-phase fluid. It enters the indoor heat exchanger to evaporate and absorb heat (at which point the indoor air is cooled), and then enters the next cycle through a four-way valve and a gas-liquid separator. Filters are mainly used for separating refrigerants and compressor oil to ensure the heat transfer efficiency of heat exchangers.

When the heat pump air conditioner operates under heating conditions, the four-way valve rotates on the dashed line in the figure. At this point, the indoor heat exchanger will quickly switch to a condenser, and the outdoor heat exchanger will become an evaporator. The low-temperature and low-pressure of the outdoor heat exchanger passes through the hot gas and then flows into the gas-liquid separator through the four-way valve and muffler. After separation, the dry and superheated gas is sucked into the compressor for compression, and compressed into high-temperature and high-pressure gas. The gas enters the indoor heat exchanger through a four-way valve to release heat and condense(At this moment, the indoor air is heated up)After being depressurized by capillary resistance, the supercooled liquid becomes a low-temperature and low-pressure two-phase fluid. It enters the outdoor heat exchanger and absorbs heat, then enters the next cycle through a four-way valve and gas-liquid separator. In order to prevent a decrease in indoor comfort caused by defrosting, a hot air bypass is used for uninterrupted geothermal defrosting. Except for the defrosting solenoid valve, its working principle is basically the same as heating during defrosting. The high-temperature and high-pressure superheated gas from the compressor is directed to the inlet of the outdoor heat exchanger. Quickly increase the temperature of the outdoor heat exchanger tooCAbove, melt the frost layer on the outdoor heat exchanger to maintain good heat transfer efficiency.

Industrial explosion-proof air conditioning maintains the foundation of ordinary air conditioning and conducts explosion-proof treatment on electrical systems, including compressors, fans, and wires. The control circuit adopts an electrical system with optocoupler solid-state relay as the core, which is explosion-proof as a whole. Maintaining the basic functions of the original air conditioner, simplifying the structure and operation, enabling the equipment to be safely used in mixed gas environments.