Refrigerant Freezer: Refrigerant Cycle Principle and Product Features

The refrigerant refrigerating dryer is based on the principle of air freeze-drying. The cooling equipment is used to cool the air to a certain dew point temperature, and then the corresponding water is separated, and the gas-liquid separation is performed by the separator, and then the water is discharged by the automatic drainer. Thereby the air is allowed to dry.

The refrigerant refrigerating dryer uses refrigeration technology to cool the compressed air to a certain zero temperature, so that the contained steam condenses into a liquid state, and condenses under the action of gravity sedimentation, impact, centrifugation and dispersion through a unique structural system inside the machine. The droplets and the majority of the solid particles and oil droplets remaining in the compressed air after the initial treatment of the main filter are highly accumulated, separated from the compressed air by a high-efficiency separator, and passed through an automatic drainer or periodically. The discharge is discharged outside the machine to obtain a water-free, high-purity compressed air with a minimum amount of dust (oil), so that the pneumatic system maintains a good working condition. The refrigerant refrigerating dryer is the best processing equipment for all kinds of air compressors. It is an ideal clean air source equipment for pneumatic control, pneumatic tools, painting and painting precision machinery, food packaging, textile and chemical industry.

First, the working principle

The refrigerant refrigerating dryer is based on the principle of freezing and dehumidification, and uses a fully enclosed compression refrigeration system to cool and cool the compressed gas discharged from the air compressor, so that a large amount of saturated water vapor and oil mist contained therein are condensed and droplets pass through the soda water. After separation, it is discharged by the automatic drainer. The saturated compressed gas at a higher temperature enters the pre-cooler of the refrigerant refrigerating dryer, and exchanges heat with the dry cold gas from the evaporator in the pre-cooler to lower the temperature and enter the refrigeration system. The evaporator exchanges a second heat exchange with the refrigerant vapor to lower the temperature of the evaporator to a temperature close to the evaporation temperature of the refrigerant. During the two cooling processes, the water vapor in the compressed gas is condensed into liquid water droplets and enters the gas and water separation with the gas stream. The separated liquid water is discharged out of the machine through the automatic drainer, and the dry compressed gas with a lower temperature enters the pre-cooler to exchange heat with the newly entered wet saturated gas, so that the temperature thereof is improved, thereby being refrigerated in the refrigerant. The machine exhaust port obtains a dry compressed gas with a low water content (ie, a low dew point) and a relatively low relative humidity. Because of its reliable operation, convenient management and low operating cost, the refrigerating dryer has become the preferred model for air compressor station purification equipment in various industries.

Second, the refrigeration system refrigeration system refrigeration system principle analysis:

1. After the start-up, the refrigerant is compressed by the compressor from the low temperature and low pressure state to the high temperature and high pressure steam.

2. The high-temperature and high-pressure steam flows into the condenser and the secondary condenser, and the heat is taken away by the cooling medium through heat exchange, and the temperature is lowered, and the high-temperature and high-pressure vapor becomes a normal-temperature high-pressure liquid because of condensation.

3. The liquid refrigerant at normal temperature and high pressure flows through the expansion valve, because the throttling pressure of the expansion valve is lowered, so that the refrigerant becomes a liquid at normal temperature and low pressure.

4. After the liquid at normal temperature and low pressure enters the evaporator, the liquid refrigerant evaporates and becomes a low-pressure and low-temperature gas due to the pressure drop. When the refrigerant evaporates, it absorbs a large amount of heat of the compressed air, so that the temperature of the compressed air drops to the purpose of drying.

5. The low-temperature and low-pressure refrigerant vapor after evaporation flows back from the suction port of the compressor, is compressed and compressed, and is discharged to the next cycle.

Third, product features

The refrigeration and air systems are accurately calculated by experts, and the design parameters are all left over 20%.

The refrigeration compressor adopts the international advanced rotary or scroll type, piston type full-closed refrigeration compressor and semi-closed screw type refrigeration compressor (more than 20HP), which is stable in operation, low in noise, reliable in performance and long in energy saving. High energy efficiency ratio, IP54 (dust and splash proof)

The heat exchanger and the wind condenser are made of high-quality copper tubes with pure aluminum fins, and the heat transfer yield of the flow structure is high, so the volume is small and the structure is compact. The cylinder material is made of stainless steel or carbon steel galvanized to avoid secondary pollution of compressed air.

The refrigeration control components are equipped with the world's most advanced Danish Danfoss and SPORLAN, ALCO and other refrigeration components, and have excellent performance. The utility model has the throttling and pressure reducing function of the thermal expansion valve, the energy regulation function of the hot gas bypass valve, the functions of over current, overload, and high pressure protection of the refrigerant.

The gas-liquid separator adopts cyclone separation and organic combination of stainless steel wire mesh for fogging, which has complete gas-liquid separation effect, avoids secondary evaporation of water, and ensures the drying effect of the refrigerant refrigerating dryer. It has better performance than the cyclone separator and is lower in performance than the filter gas-liquid separator. It has a higher performance-price ratio.

The water condenser is a high-quality low-wing copper tube, slow water flow, multi-stroke, high heat exchange efficiency, and long-term use is not suitable for scaling.

The automatic drainer is set as needed, except for water and energy saving, the effect is good; the float type, electronic timing can be selected.

External rotor cooling fan, large air volume, low noise, frequent start and stop and long life.

The pressure-bearing parts are manufactured, tested and accepted according to the national GB150-1998 "Steel Pressure Vessel" and GB151-1999 "Shell-and-tube Heat Exchanger", and are subject to the supervision of "Safety Technical Supervision Regulations for Pressure Vessels".

The structure of the refrigerant refrigerating dryer is reasonable in design, easy to maintain; the surface is thermally sprayed, the appearance is beautiful, no rust; no foundation installation, stable operation, no vibration, low maintenance rate, no consumables, low operating cost, no need for continuous operation Dedicated to waiting.