Barrel pump liquid supply principle.

Using the mechanical action of the pump, the low-temperature refrigerant is delivered to the evaporator. After throttling, the low-temperature refrigerant first enters the fluorine barrel with certain storage volume and certain gas-liquid separation volume, and then the fluorine pump conveys several times of the evaporated low-temperature liquid to the evaporator in each storehouse. Part of the liquid absorbs heat and vaporizes in the evaporator, and the rest of the liquid returns to the fluorine barrel with the vapor through the gas return pipe. After the gas-liquid separation, the vapor is sucked away by the refrigeration compressor, and the separated liquid and the new supplementary liquid equivalent to the evaporation amount are transported to the evaporator by the fluorine pump for recirculation.

The barrel pump refrigeration system has the features of improving the cooling capacity of evaporator, ensuring long distance liquid supply, simple system operation, convenient centralized control, automation and convenient frost melting operation, etc.

Advantages of barrel pump liquid supply and hot fluorine frost melting system.

(1) Full liquid evaporator has better heat transfer efficiency, which can improve the energy saving of the system.

(2) The pump liquid supply is suitable for long distance liquid supply in vertical and horizontal pipeline, which can reduce the hydraulic loss of liquid supply pipe riser and resistance loss of suction pipeline.

(3) As the resistance loss on the pipeline is reduced, the evaporation temperature of the system can be increased, thus improving the energy saving of the system.

(4) It can solve the problem of long return line, unavoidable gas and liquid bag in the pipeline causing large system resistance loss and unfavorable oil return.

(5) There is no restriction of expansion valve opening differential pressure, and the condensing temperature can be low enough to improve the energy saving of the system.

(6) Hot fluorine frost melting system, because the heat released by the hot Freon steam from the compressor is used to melt the frost layer on the evaporator surface, solving the problems of electric frosting and water frosting in low-temperature storage when it is easy to freeze.

Barrel pump china liquid supply and hot fluorine frost melting system notes.

(1) the selection of oil separator is very critical, the oil separator has high requirements for oil separation capacity and oil separation efficiency, and try to reduce the migration of refrigeration oil in the system.

(2) Control the exhaust temperature and suction superheat of the system to prevent a large amount of refrigerant oil migration into the system caused by the return liquid.

(3) Control the oil temperature when shutting down to prevent a large amount of refrigerant from dissolving in the oil and the refrigerant from suddenly vaporizing and taking away the lubricating oil when starting up.

(4) The design of oil return pipeline system can set multiple oil return ports and control the use of oil return ports according to the liquid level.

(5) Hot fluorine melting frost: to ensure that there is enough heat source, use grouping frost and use relief valve to ensure that the refrigerant temperature is 10 degrees when frosting, to achieve the best effect of frosting. At the same time, the high liquid level of the low pressure circulation barrel should not exceed 70%. In order to prevent "liquid hammer phenomenon", 2-step open solenoid valve is used for hot fluorine frost melting.