The working principle and advantages and disadvantages of cold storage barrel pump liquid supply

Application of semi-filled liquid fluorine refrigeration technology.

At present, it is to improve the evaporator in the cold storage.

The efficiency of fluorine pumps is generally used in full liquid circulation and pumpless pressure liquid supply technology, but their fatal shortcomings are also well known in the industry.

First of all, their bulky refrigerants.

The charge is the most fatal. According to the rule, the refrigerant will leak at least once due to various reasons within 5 years, and at least 20% of the refrigerant will leak during the one-year warranty period. Secondly, the full liquid circulation cannot remove the dirt in the system, so that it remains permanently inside the system, which may cause failure at any time.

In addition, the power consumption of the pump body of the barrel pump liquid supply cannot be underestimated, and the pressure liquid supply is even more ineffective when the goods are stored in large quantities.

On the contrary, the semi-full liquid supply technology developed by our company overcomes the above shortcomings and has many advantages. It uses conventional refrigeration methods to ensure that each refrigeration circuit has sufficient surplus refrigerant flowing through to ensure the liquid supply of each circuit and achieve the purpose of liquid supply by the barrel pump. At the same time, the system pipes are continuously flushed, so that dust and foreign matter continue to accumulate in the filter, and finally achieve a spotless effect.

Due to the non-flooded liquid supply, the fluorine charge in the system is similar to that of a normal cycle, and a slight reduction in refrigerant can be easily detected.

The liquid supply of the barrel pump is a bit fast, the liquid supply is uniform, and the oil storage of the pipe or evaporator is less, but your system should be as reasonable as possible, the disadvantage is that the cost is high, there are many hidden dangers, increasing the burden on the operator, and the problem of low barrel oil return is obvious, of course, the design can be avoided as much as possible.

Details: Shandong Shenzhou refrigeration equipment ****, the successful application of freon barrel pump unit projects in about 40, the technology is relatively mature, basically there is no problem of difficult oil return.

I'd like to know about this, but there are relatively few people who know this.

You're talking about refrigerants? How does it work? The working principle of refrigeration equipment is to use the reaction of the principle of thermal expansion and cold contraction, and use the compressor pump steam to compress and release heat, and the liquid becomes a gas (expansion) at low pressure after passing through the capillary, and the refrigerant (fluorine in the refrigerator we are talking about) is a physical change process.

1.The barrel pump bucket unit is composed of a low-pressure circulating liquid storage barrel and a centrifugal canned ammonia pump, an electrical control box, a structural steel support, etc., which is suitable for recirculation.

The liquid supply system of the evaporator, its process pipelines, valves, automatic control components, and electrical components, have been fully assembled to constitute an integrated liquid supply device for barrel pumps, which greatly reduces the time of infrastructure investment and infrastructure construction, and has the functions of automatic liquid supply, liquid level control, liquid level display, high liquid level alarm, automatic protection of ammonia pump, automatic or manual operation, etc., which is suitable for freezing and refrigeration of ice and block ice and food cold storage of hydropower projects, beer, medicine, petrochemical and coal.

Process cooling for carbon, national defense, scientific research and other industries.

The cold storage liquid supply method is divided into: direct expansion liquid supply, gravity liquid supply, barrel pump liquid supply;

The use of ammonia pump liquid supply in multi-layer cold storage has several advantages: 1. The system is centralized, the operation is safe and convenient, 2. The liquid supply is sufficient, and the heat exchange efficiency of the system is high;

3. The liquid level fluctuation of the equipment is small, and the liquid supply is uniform.

It is a more reasonable way to supply liquid

It is suspected that there is an abnormality in the temperature sensing chamber of the expansion valve, or that there are impurities or excessive moisture in the piping of the refrigeration system.

The conventional practice is to set up two to three oil intakes up and down in the middle of the liquid level fluctuation curve of the circulating barrel to lead to the heater for separation, and then pressurize the compressor or map back to the compressor through the hand valve or solenoid valve! Hot gas defrosting from the condenser inlet to the high-pressure hot gas pipe automatically or manually sent to the evaporator that needs to be defrosted, while controlling the pressure in the evaporator, the general pressure in the evaporator is controlled at about 3 kg, higher than 3 kg constant pressure valve opens through the defrosting return pipe directly to the pure ring barrel, defrosting hidden source is generally grouped defrosting, taking turns to defrost, if there is anything unclear, you can contact Chengdu Kest refrigeration engineers, their company has more research experience in this area!

Small cold storage and high temperature storage generally use direct expansion liquid supply;

Larger low-temperature storage, thousands of tons of cold storage, with aluminum rows, it is better to use barrel pumps to supply liquid.

Frosting is generally due to the leakage of the pipeline, and the amount of freon is not enough, find a master to check the pipe.

Is your cold storage refrigeration system fed by direct expansion or by drum pump? Please check the following operating parameters: 1. Compressor discharge pressure, or condensing pressure; 2. The suction pressure of the compressor. Upload the current data.

Hello, there are many reasons why the temperature of the cold storage cannot be lowered, the following six common phenomena for your reference: 1. The frost on the surface of the evaporator is too thick or the dust is too much, and the heat transfer effect decreases 2. The cold storage has a large cooling loss due to poor insulation or sealing performance 3. There is more air or refrigeration oil in the evaporator, and the heat transfer effect decreases 4. The throttle valve is improperly adjusted or blocked, and the refrigerant flow is too large or too small 5. The compressor efficiency is low, and the refrigeration capacity cannot meet the load requirements of the warehouse 6. The refrigerant in the system is insufficient, The refrigeration capacity is not enough on my answer, thank you