is the air conditioning compressor in a refrigerant circuit from the refrigerant compressed drive action. Air-conditioning compressor is generally installed in the outdoor unit. The air conditioner compressor refrigerant withdrawn from the lower pressure region to be compressed by the high-pressure zone cools and condenses, the heat is circulated through the heat sink to the air, but also to liquid refrigerant from gaseous pressure.
1 air conditioner compressor type
First, according to the principle of increasing the gas pressure Category
1. Displacement (piston, screw, scroll, rolling piston type) [123 ] 2. speed of formula (centrifugal, axial)
Second, according to the type of refrigerant used classification
1. the organic refrigerant compressor (r22.r404a.r134a)
2. inorganic refrigerant The compressor (r717.r744)
Third, a sealed manner by Category
1. open refrigeration compressor
2. The semi-hermetic refrigerant compressor
3. Fully enclosed refrigeration compressor [123 ] Fourth, according to the classification used in the evaporation temperature
2 air conditioning compressor works
The compressor – condenser – throttle device – Evaporator
heating and cooling the same principle, i.e. the reverse Carnot cycle is different from the refrigeration principle a condenser and an evaporator for the exchange, namely: a compressor – evaporator – expansion device – a condenser. Compressor refrigeration system
refrigeration compressor is the heart of the system, whether it is air-conditioning, cold storage, refrigeration chemical process conditions and so should have a compressor to do to protect this important part!
Many types and forms a refrigerant compressor, according to the principle of displacement and velocity can be divided into two types, which is the most common displacement. How
compressed gas compressor is it?
that is to be simple and complete delivery of the compressed gas and the process gas by changing the volume! Any power equipment needs to have a driving force to do work is completed, the compressor is the same, it needs a motor (motor) to drive.
displacement compressor and a reciprocating piston is divided into two kinds of rotary.
1, is changed by the reciprocating piston motion of a piston reciprocating in the cylinder working volume of the gas; piston compressor has a long history, the production technology is mature.
2, the rotary compressor comprises a blade (vane) rotary compressor, screw compressor, most currently produced using a rotary air-conditioner compressor; screw compressor is mainly used for large refrigeration equipment,
the main cooling system in several equipment:
the compressor – condenser – throttle device – evaporator
it is this basic principle, the compressor compressing the refrigerant to a high pressure saturated gas (ammonia or Freon), then through said gaseous refrigerant condensed in the condenser.
after passing through the throttle device, into the evaporator, the desired coldBut medium-cooling heat exchanger. For example, an evaporator connected to each room of the building, the meandering tube evaporator exchanging heat with the air, and then blowing cold air blown by the air which the room.
After the refrigerant within the evaporator heat exchanger to become a low vapor meandering pipe back to the compressor, and then compressed by the compressor, so that recycling is complete refrigeration system.
Heating systems generally this principle, but in the reverse manner.
3. The air conditioning compressor maintenance method
Open type compressor lubricant adding method. There are three general, from the suction side of suction valve and the through hole, the hole is added from the fuel added from the lower portion of the crankcase, the specific steps are as follows:
1, closing the intake valve, the compressor is started a few minutes, the crankshaft the refrigerant discharged into the condenser tank, a vacuum crankcase. Stop and immediately closing the exhaust valve, the bypass hole slowly unscrew the plug exhaust shut-off valve, the high pressure chamber remaining air out. Spin suction valve and the bypass hole plug, fitted joint bevel teeth and brass.
2, ready for lubricants. System Schematic compressor cycling
3, with a live finger press suction nozzle, the air compressor is started out the crankcase. If liquid hammer phenomenon is found, so that the compressor continues to operate for 2 to 3 minutes to make crankcase in a vacuum state, when press live nozzle fingers felt there was a strong suction when the stop.
4, the live finger press spout immersed in the oil, let go after immersion, the oil suction pipe begins crankshaft pipe.
5, observed oil indicator, meaning until the oil reaches the oil line.
6, and remove the brass fitting, a screw plug wrench, the compressor is started so that the crankshaftAir is sucked into the inside out, the exhaust sound that is heard when the exhaust shutoff valve plug wrench.
7, open intake and exhaust valves, fuel is completed.
4. The development of air-conditioning compressor industry
After two years of major companies have the constant speed of the previous model energy-efficient, starting in 2011, to improve the supply of variable frequency products become almost a common strategy for all air-conditioning compressor business. Major companies have improved accounting inverter compressor. Yield proportion of the inverter compressor 30 from GMCC Meizhi has a percentage of the cold year, up to 37 percentage. Mitsubishi Electric this proportion up to 40 percentage. Panasonic Wanbao nearly 10 percentage points to the magnitude of the accounting year to enhance the conversion products, improve cold 2012 this proportion to 60 percentage.
Shanghai Hitachi official also said that Shanghai Hitachi fact, from 1991 the introduction of inverter technology is ferrite, rare earth and ferrite products all have two sets can be switched at any time based on customer demand, customers in high energy-efficient commonly choose to use the heating capacity of rare earth products technology, technology in general ferrite energy efficient products.
Wan said Panasonic, Matsushita Wanbao ferrite technology is mature, about 70 percentage of the total production. At higher rare earth prices when Panasonic Wanbao ferrite products corresponding to the market. Ferrite primary compressor energy efficiency levels 1 and 2 deal with the market, the energy efficiency is mainly a sectional view of rare earth material corresponding to the air conditioner compressor. “If the difference between the price of rare earth and ferrite expanding, we will be based ferrite material, and continue to develop more efficient the ferrite products to the corresponding energy-efficient market requirements.”
ferrite frequency compression machine-orientedThere Ruizhi companies and Chunlan. Chunlan side said rare earth as an important strategic resource, prices will remain high, ferrite instead of rare earth is an inevitable trend, after technology research and technical innovation, Chunlan ferrite inverter compressor performance has been quite rare earth compressor performance and . But a ferrite-based air-conditioning compressor business people said that after testing, in 1.5P following models, the ferrite inverter compressor can achieve energy efficiency level 1, but in more than 2HP models achieve a level of energy efficiency the “more strenuous.”
CRC Sanyo, Mitsubishi Electric and LG is still adhere to the rare earth motor drive inverter technology. The three companies agreed that when future inverter air conditioner energy efficiency standards revision, ferrite motor will not be able to meet the needs of energy-efficient products.
In recent years, the development of air-conditioning compressor industry almost in trouble, in the harsh environment, the air-conditioning compressor business still continues to move towards the pace of upgrading of product structure, and strive to improve the supply of frequency conversion products, improve the efficiency of conversion products , making the inverter air conditioner market can be improved.