What is the Advantage and Disadvantage of refrigeration compressor manufacturers

Semi-hermetic piston refrigeration compressor

If you are looking for more details, kindly visit Leling.

At present, semi-hermetic piston compressors are mostly used in cold storage and refrigeration markets (commercial refrigeration and air conditioners are also useful, but they are relatively less used now). Semi-hermetic piston cold storage compressors are generally driven by four-pole motors, and their rated power is generally between 60-600KW. The number of cylinders is 2--8, up to 12.

Advantage:

1. Simple structure and mature manufacturing technology;

2. The requirements for processing materials and processing technology are relatively low;

3. It is easy to achieve high compression ratio, so it has strong adaptability and can be used in a very wide pressure range;

4. The device system is relatively simple and can be applied to a wide range of pressure and cooling capacity requirements.

Shortcoming:

1. Large and heavy in shape;

2. Large noise and vibration;

3. Difficult to achieve high speed;

4. Large gas pulsation;

5. Many wearing parts and inconvenient maintenance

Scroll refrigeration compressor:

Scroll refrigeration compressors are currently mainly in a fully enclosed structure, and are mainly used in air conditioners (heat pumps), heat pump hot water, refrigeration and other fields. The supporting downstream products include: household air conditioners, multi-split units, modular units, small water-to-ground source heat pumps, etc. At present, there are manufacturers of scroll refrigeration compressors that can achieve 20~30HP per unit.

Advantage:

1. There is no reciprocating mechanism, so the structure is simple, small in size, light in weight, less in parts (especially less in wearing parts), and high in reliability;

2. Small torque change, high balance, small vibration, stable operation, and small vibration of the whole machine;

3. It has high efficiency and frequency conversion speed regulation technology within the range of cooling capacity it adapts to;

4. The scroll compressor has no clearance volume and can maintain high volumetric efficiency operation

4. Low noise, good stability, high safety, relatively not easy to liquid shock.

Screw refrigeration compressor:

Screw compressors can be divided into single-screw compressors and twin-screw compressors. It is now widely used in refrigeration equipment such as refrigeration, HVAC and chemical technology. The input power range has been developed to 8--KW, its research and development fields are very extensive, and its performance optimization potential is great.

Advantage:

1. Fewer components, less wearing parts, high reliability, stable and safe operation, and low vibration;

2. The efficiency of partial load is high, it is not easy to appear liquid shock, and it is not sensitive to liquid shock;

3. It has the characteristics of forced gas transmission and strong adaptability to working conditions;

4. It can be adjusted steplessly.

Shortcoming:

1. The price is expensive, and the machining accuracy of the body parts is high;

2. The noise of the compressor is high when it is running;

3. Screw compressors can only be used in medium and low pressure ranges, and cannot be used in high pressure occasions;

4. Due to the large amount of fuel injection and the complexity of the oil treatment system, the unit has many ancillary equipment.

1.Half-sealed piston refrigeration compressor

Semi-enclosed piston compressors are more commonly used in cold storage and refrigerated markets (commercial refrigerated air conditioning is also useful, but is now used relatively infrequently).

The semi-closed piston type cold storage compressor is generally driven by a quadrupole motor, and its rated power is generally between 60 and 600KW.

Number of cylinders is 2-8, up to 12.

Advantages:

⑴ Simple structure and mature manufacturing technology;

⑵ Low requirements for processing materials and processing technology;

⑶ It is easy to achieve high compression ratio, so it is adaptable and can be used in a wide range of pressure.

⑷ The device system is simple and can be applied to a wide range of pressure and refrigerating requirements.

HERO-TECH uses Bitzer semi-hermetic piston compressor and Copeland butterfly valve compressor.

Disadvantages:

⑴ Big and heavy;

⑵ Large noise and vibration;

⑶ It is difficult to achieve high speed;

⑷ Large gas pulsation;

⑸ Many vulnerable parts and inconvenient maintenance;

2.Rotor refrigeration compressor

The rotor refrigeration compressor is totally enclosed, which is generally used in household air-conditioning or small refrigeration equipment. The refrigeration capacity of the compressor is not high, at 3KW~ 15KW.

Advantages:

For more information, please visit refrigeration compressor manufacturers.

⑴ Simple structure, small size and light weight.

Compact size;

⑵ No suction valve, high speed, low vibration and stable operation;

⑶ Suitable for variable speed operation, with speed ratio up to 10:1;

HERO-TECH uses Panasonic compressor.

Disadvantages:

⑴ High requirements on system cleanliness and processing precision;

⑵ The leakage, friction and wear between the sliding plate and the cylinder wall surface are relatively large, with obvious performance degradation;

⑶ The speed unevenness of single-rotor compressor increases at low speed;

3.Scroll refrigeration compressor

The scroll refrigeration compressor is mainly in full closed structure, mainly used in air conditioning (heat pump), heat pump hot water, refrigeration and other fields.

Supporting downstream products are: home air-conditioner, multi-on-line, modular machine, small water source heat pump and so on.

Advantages:

⑴ There is no reciprocating motion mechanism, so it is simple in structure, small in volume, light in weight, with few parts (especially vulnerable parts) and high reliability;

⑵ Small torque variation, high balance, small vibration, stable operation and small vibration of the whole machine;

⑶ High efficiency and variable frequency speed regulation technology in the range of refrigerating capacity;

⑷ The scroll compressor has no clearance volume and can maintain high volume efficiency

⑸ Low noise, good stability, high safety, relatively hard to liquid hammer.

HERO-TECH uses SANYO, Danfoss, and Copeland compressor

Disadvantages:

⑴ High precision requirements, and the geometric tolerance is all in the micron level;

⑵ No exhaust valve, poor performance under different working conditions;

⑶ The working chamber is not easy to carry out external cooling, and the heat during the compression process is difficult to discharge, so only the gas with low adiabatic index can be compressed or internal cooling.

⑷ Large displacement scroll compressor is difficult to realize.Due to the limitation of tooth height, large displacement diameter and unbalanced rotation mass increase.

4Screw refrigerating compressor

Screw compressors can be divided into single-screw compressors and double-screw compressors.

It is widely used in refrigeration equipment such as refrigeration, heating ventilation Air conditioning and chemical technology.

The input power range has been developed to 8-kw, and its research and development field is very extensive, with great potential for performance optimization.

Advantages:

⑴ Less parts and components, less vulnerable parts, high reliability, stable operation and low vibration;

⑵ The efficiency of partial load is high, and it is not easy to be hit by liquid, and it is not sensitive to liquid hit;

⑶ Strong adaptability of working conditions with the characteristics of forced gas transmission;

⑷ Stepless regulation can be carried out.

HERO-TECH uses Bitzer and Hanbell compressor.

Disadvantages:

⑴ High price, high machining accuracy of machine parts;

⑵ High noise when the compressor is running;

⑶ Screw compressors can only be applied in the range of medium and low pressure, and cannot be used in high pressure situations;

⑷ Due to the large amount of fuel injection and complex oil treatment system, the unit has a lot of accessory equipment.

5.Centrifugal refrigeration compressor

The centrifugal compressor has large refrigerating capacity, which is suitable for large central air-conditioning system and petrochemical industry

Advantages：

⑴ In the case of the same cooling capacity, especially in the case of large capacity, compared with reciprocating compressor unit, the large oil separation device is omitted, the weight and size of unit is small, and the floor area is small;

⑵ Centrifugal compressor has simple and compact structure, few moving parts, reliable operation, durable service, low running cost, easy to realize multi-stage compression and multiple evaporation temperatures, and easy to realize intermediate cooling;

⑶ The lubricating oil mixed in the centrifugal unit is very few, which has little influence on the heat transfer effect of the heat exchanger.

⑷Large gas transmission, high rotating speed, even gas supply, eliminating the disadvantages of gas with oil;

Disadvantages:

⑴ It is not suitable for the situation of small flow rate and the single stage pressure ratio is low.

⑵ Surging is the inherent defect of centrifugal compressor. The working condition of the same unit cannot be changed greatly, and the scope of application is relatively narrow.

⑶ The centrifugal compressor can only work under the design condition to obtain the highest efficiency and easy to surge

⑷ Poor operational adaptability, high gas flow rate, high friction resistance and low efficiency;

If you are looking for more details, kindly visit heat pump scroll compressors.

Post time: Dec-14-

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