some people may say that the domestic compressor is not good. in fact, to tell you the truth, I dismantled Gree's high-end model Sleeping Treasure and used Gree's own compressor Lingda compressor. The Gree mid-range machine Xiaojinliang uses Panasonic Wanbao compressor.
in fact, unless it is an imported compressor, there is no difference in quality between the compressor of the joint venture brand and that of the domestic compressor!
question 2: what is the best compressor for air conditioning? I have refurbished the compressor, but the three-voltage machine is not the best. The double-row light truck is definitely equipped with a 58 compressor. Generally, the Japanese three-voltage machine is refurbished by second-hand goods bought by businessmen in China. It is recommended to use the brand-new compressor in Shanghai. It is good to renovate the compressor for one year. If the place where you install the air conditioner has the conditions, it is recommended that you use the refurbished Japanese Denso 1PA15C. Personally, this kind of press is more refurbished than the brand-new high-grade mitsubishi electric, Daikin and Fujitsu's medium-grade Hitachi, Sharp and Panasonic. Next level: LG Samsung Gree Hisense Midea's Chunlan low-grade Chigo Oaks Changhong Oaks Kelon's worldwide sales volume is the first in LG China, Gree buys Mitsubishi if it has money, and it is better to choose Gree, and Hisense's frequency conversion saves electricity with good cost performance. If you want to save electricity, you can buy Chigo with high energy efficiency ratio. However, Mitsubishi is the best compressor with a relatively high price, and Gree also claims to choose Mitsubishi, and Hitachi's compressor is also good < P > Question 3: What is the compressor of air conditioner? Poor working of the compressor of air conditioner will indeed lead to the inability to refrigerate, and the leakage of fluorine in the air conditioner will also lead to the inability to refrigerate. The accumulation of dust is also one of the reasons for the inability to refrigerate the air conditioner. It can only be said that the personnel who repair the air conditioner have a poor sense of responsibility, or lack of technical experience and misjudgment, and it is impossible to directly judge the cause of the problem. The compressor of air conditioner compresses Freon and then transports the liquefied Freon to the refrigeration system. Freon belongs to ultra-low temperature gas, which will volatilize under normal temperature and pressure. In junior high school physics, liquid volatilization will absorb heat, thus absorbing the heat in the air and blowing out cool air. The leakage of fluorine will lead to the lack of liquid necessary for refrigeration, and the refrigeration effect cannot be achieved. The bad compressor means that the vaporized Freon cannot be compressed into liquid, and therefore refrigeration cannot be achieved. Therefore, if it is a compressor problem, it is a serious problem of air conditioning, and the price of compressor is relatively expensive. It is recommended to find more air conditioners to repair before making a decision on whether to replace them. = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = There are many kinds and forms of refrigeration compressors, which can be divided into two types according to the principle: volumetric type and speed type, of which volumetric type is the most common. Positive displacement compressors are divided into reciprocating piston type and rotary type: 1. Reciprocating piston type changes the working volume of gas by reciprocating the piston in the cylinder; Piston compressor has a long history and mature production technology. 2. Rotary compressors include scraper (vane) rotary compressors and screw compressors. At present, most domestic air conditioners use rotary compressors. Screw compressors are mainly used in large-scale refrigeration equipment, and now there are many screw compressors in some large shopping malls and office buildings. The refrigeration system is mainly divided into several devices: compressor-condenser-throttling device-evaporator. Its basic principle is this: the compressor compresses the refrigerant into high-pressure saturated gas (ammonia or freon), and this gaseous refrigerant is condensed by the condenser. After throttling by the throttling device, it is introduced into the evaporator to cool and exchange heat with the medium to be cooled. For example, if the evaporator is connected to all rooms in the building, the serpentine tubes in the evaporator will exchange heat with the air, and then the cold air will be blown into the air in the room by blowing. The refrigerant in the serpentine tube of the evaporator turns into low-pressure vapor after heat exchange and returns to the compressor, and then is compressed by the compressor, so that the refrigeration system is completed by recycling. The heating system is basically the same principle, but in the opposite way.
question 4: what material is the air-conditioning compressor? Air-conditioning compressor is mainly composed of five parts: upper and lower flanges, cylinder, crankshaft, valve plate, piston and so on. Most of them are made of castings, and some small models in the upper flange are made of powder metallurgy parts, and all large models are made of castings. Except for the double-cylinder compressor, the other parts in the lower flange are basically made of powder metallurgy parts.
question 5: the role of air-conditioning compressor is the heart of the refrigeration system. it sucks in low-temperature and low-pressure refrigerant gas from the suction pipe, drives the piston to compress it through motor operation, and then discharges high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle, thus realizing the refrigeration cycle of compression → condensation → expansion → evaporation (heat absorption).
question 6: the difference between air-conditioning compressor and air-energy compressor. the air-conditioning compressor is closed and the air compressor is open.
question 7: is the compressor of the air conditioner located in the indoor unit or the outdoor unit? Compressors, condensers, etc. are of course in outdoor units, indoor units are evaporators, internal fans, etc.
Question 8: The difference between refrigerator compressors and air-conditioning compressors is that there are many similarities between air-conditioning and refrigerator compressors, but the main difference is about the refrigerant. R12 was originally used, but due to the elimination of R12, R134A and R6A are mainly used in refrigerators now; There are R123, R22, R47C, R41A and R134A for air conditioning. From the power point of view, there is a lack of reference. There is also a large cold storage in the refrigerator and less than one small machine in the air conditioner. Since the principle of air conditioner and refrigerator is based on vapor compression refrigeration, you only need to know the characteristics of various compressors.
in the refrigeration industry, there are two main refrigeration modes, one is the evaporative refrigeration cycle relying on the compressor, and the other is the absorption refrigeration cycle burning the boiler.
At present, several common types of compressors are divided into two types, namely, positive displacement compressor and speed compressor.
Speed compressor is mainly what we call centrifuge.
Centrifugal compressor is the compressor with the largest refrigeration capacity and the highest efficiency. Its cooling capacity ranges from 4 cold tons to 25 cold tons. (P.S. one cold ton =3.516kW) The input voltage can also be selected above 38V and 1V according to the starting mode. The principle of centrifugal compressor is to use impeller to drive refrigerant gas, convert kinetic energy into air potential energy, and increase the pressure of refrigerant gas, thus achieving compression effect. The main refrigerants used are R123 and R134A, among which R123 is about 7% more efficient than R134A because of its better thermal performance.
for the appearance, you can refer to Trane's three-stage centrifuge set, which is the most typical.
Positive displacement compressors mainly include screw compressor, scroll compressor, piston compressor and rotor compressor.
Screw compressor has the largest refrigerating capacity among positive displacement compressors, and its refrigerating capacity generally ranges from 5 tons to 4 tons. Screw compressors are divided into twin-screw type and single-screw type. Twin-screw type has many applications and high efficiency. It consists of a male rotor and a female rotor, and when rotating, it compresses the refrigerant by meshing with the surface helix. The design of helix is the key to its efficiency, so each manufacturer is different. Use refrigerants R134A and R22.
the appearance can refer to RTHD of Trane and 3HXC of Carrier.
the cooling ranges of scroll compressor and piston compressor are roughly covered with each other, and the cooling specifications can be inquired from the manufacturer, and the maximum is about 6kW. It is composed of two scroll plates, dynamic and static. When rotating, the refrigerant is continuously compressed through the scroll line and finally squeezed out from the central point. In particular, the digital scroll technology developed by Gulun, which is very popular now, makes the refrigerant bypass by increasing a scroll by 1mm, thus achieving the effect of compressor load reduction. The main refrigerants used are R134A, R47C, R41A and R22.
for the appearance, please refer to the compressor of Gulun and Danfoss.
piston compressor is a compressor that everyone is very familiar with. It has a long history and mature technology, and its cooling capacity ranges from 2.2kW to 2kW. The crankshaft connecting rod drives the piston to compress the refrigerant. Refrigerant is mainly R22, R134A, R41A and R47C.
this appearance should not need reference, right? Whether it is semi-closed or fully closed, most places have detailed introductions.
the rotor compressor is mainly used in the former window air conditioner, and its cooling capacity is quite small, generally less than 5kW. Its principle is that a rotor with a push rod rotates in the cavity to compress the refrigerant. It is rarely used now.
this understanding is of little significance.
by the way, generally, 3 to 5 air conditioners have single-phase 22V and three-phase 38V options, with single-phase down and three-phase up. The frequency used in China is 5HZ, and in the United States and Japan, it is 6HZ.
Centrifugal compressors are mainly used in centrifugal chillers, which have the advantages of large refrigeration capacity and high energy efficiency ratio. They are generally used in office buildings, factories, high-end hotels, sports pipes and so on with large air-conditioning area. For example, Shanghai World Financial Center and Jinmao Building all use centrifugal chillers.
Screw compressors are mainly used in various types of screw units. This kind of main engine has a large cooling capacity, which is a supplement to centrifugal chillers. It is used in situations where the air conditioning area is relatively large, but there is no need to use centrifugal units. At the same time, the screw unit is also commonly used for total heat recovery, and its hot water outlet temperature is higher than that of the centrifuge unit, which is generally 45 degrees, and the screw unit can reach 6 degrees.
scroll compressor is widely used in air-cooled modular cold water (or heat pump) units, and most of them ... >; >
Question 9: What's the difference between an air compressor and an air-conditioning compressor? An air-conditioning compressor is a device that compresses and drives the refrigerant in the air-conditioning refrigerant circuit.
An air compressor is a machine that uses the principle of air compression to make compressed air that exceeds atmospheric pressure and is used in industry such as tunnel excavation.