How to Hitachi Central Air Conditioning Compressor Maintenance Hitachi Central Air Conditioning Compressor【Detailed Explanation】 Hitachi central air-conditioning is a brand with good reputation and brand culture among central air-conditioning brands.The most indispensable thing for Hitachi central air-conditioning is Hitachi central air-conditioning compressor.If there is Hitachi central air-conditioning compressor, Hitachi central air-conditioning In order to work better, so for Hitachi central air-conditioning compressors, product maintenance of Hitachi central air-conditioning compressors is very important. The following editors will introduce to you-Hitachi central air-conditioning compressor product functions and maintenance. Hitachi central air conditioning compressor Hitachi, located in the forefront of the world's top 500, ranked in the top 10 of the world's most respected brands, has strong scientific and technological strength in high-tech industries such as machinery manufacturing, integrated circuits, circuit electronics, nuclear energy, and magnetic levitation trains. For a long time, Hitachi air-conditioning system has been taking scientific and technological progress and technological leadership as its own responsibility, constantly innovating to meet the ever-changing changes in society. The working circuit of the air-conditioning compressor is divided into an evaporation area (low pressure area) and a condensation area (high pressure area). The indoor unit and outdoor unit of the air conditioner belong to the low-pressure or high-pressure area (depending on the working status). Air-conditioning compressors are generally installed in outdoor units. The Hitachi central air-conditioning compressor draws refrigerant from the low-pressure area, compresses it, and sends it to the high-pressure area for cooling and condensation. The heat is dissipated into the air through the fins. The refrigerant also changes from gaseous to liquid, and the pressure increases. The refrigerant flows from the high-pressure area to the low-pressure area, and is ejected into the evaporator through the capillary. The pressure drops suddenly, and the liquid refrigerant immediately becomes gaseous, and absorbs a large amount of heat in the air through the heat sink. In this way, Hitachi central air conditioning compressors continue to work, constantly absorbing the heat at one end of the low-pressure area into the refrigerant and then sending it to the high-pressure area to distribute to the air, which plays a role in regulating the temperature. Opening Hitachi central air-conditioning compressor to add lubricating oil. Generally, there are three types, which are sucked from the through hole beside the suction cut-off valve, added from the oil filling hole, and added from the lower part of the crankcase.The specific operation steps are as follows: close the suction cut-off valve, start the compressor for a few minutes, and discharge the refrigerant in the crankcase Into the condenser to vacuumize the crankcase. Shut down and immediately close the exhaust shut-off valve, slowly unscrew the bypass plug of the exhaust shut-off valve, and release the residual gas in the high-pressure chamber. Unscrew the screw plug of the bypass hole of the suction stop valve, and install the taper joint and the copper tube. Prepare the lubricant. Hold the suction pipe port with your finger and start the compressor to extract the air from the crankcase. If liquid hammering is found, let the compressor continue to run for 2 to 3 minutes to make the inside of the crankcase vacuum, and stop when the finger holding the nozzle feels a strong suction force. Immerse the orifice held by your finger in the oil, let go after immersing it, and the oil will be sucked into the crankshaft tube from the oil tube. The above is some simple knowledge about Hitachi central air-conditioning compressor introduced by the editor. First, we can understand the product functions of Hitachi central air-conditioning compressor. Second, we can have a certain understanding of the maintenance and repair of Hitachi central air-conditioning compressor. Correct Hitachi central air-conditioning compressor maintenance and maintenance can bring us better use effect of Hitachi central air-conditioning, and can also increase the service life of Hitachi central air-conditioning compressor.
64818 kinds of air-conditioning compressor competition! Whose compressor is the strongest refrigeration heart Many people say that buying an air conditioner means buying a compressor. This is true. Simply put, the quality and life of the compressor determine the attitude of most people to buy. So what are the common compressor brands in the market? What compressors are used in these brand air conditioners?1. Common compressor brands in the market China's holding compressor brands: Xi'an Dajin Qing'an, Sichuan Changhong TECO, Zhongshan Galanz, Zhuhai Lingda (Greece), Shanghai Hitachi Highland (Hisense), Meizhi GMCC (Midea), Chunlan Compressor.
China Taiwan compressor brand: Ruizhi and TECO TECO. Joint venture compressor brands: TCL Ruizhi (Huizhou), Panasonic Wanbao (Guangzhou), China Resources Sanyo (Shenyang) (now called Panasonic), Feida Shidong (Xi'an). Japanese compressor brands: Toshiba Carrier, Mitsubishi Electric, Mitsubishi Heavy Industries, Panasonic Panasonic, SANYO (Panasonic), Hitachi Hitachi, and Nebrako (Nidec from Nidec, Brazil). Korean compressor brands: Samsung and LG (Lejin). American compressor brands: Feida Shi, Copeland, Kelly. Italian compression brand: Zanussi (ZEL). French compressor brand: Taikang Tecumseh. 2. Interpretation of common air-conditioning brands in the market
1. Gree Gree masters the core technology, do you believe it? Gree's current compressor brand is TOSOT (TOSOT), which is the product of Japan's Hitachi production line introduced in the last century through technological transformation. Founded in 1985, it is earlier than Gree (Gree was born in 1991). It is one of the earliest and largest domestic air-conditioning compressor professional enterprises integrating R&D, production, sales and service. It is a Gree fan. Acquired it, there is a compressor, one compressor plus two fans is the air conditioner, a circuit design is pulled to Japan Daikin, Gree strengthened the air conditioning circuit design and planning through cooperation with Daikin, and now Gree air conditioning is the world’s The brand with the highest sales volume has mature technology, stable quality, and professional after-sales service. Many sellers are basically out of stock during the peak sales season. Because Gree is almost the benchmark for domestic machines, so in the first half of 2018, nearly 40% of the domestic air-conditioning market is in its hands, reaching an astonishing 38.8%, so it is too late to sell so many compressors, compressors, You can use someone else's. For example, Mitsubishi (Guangzhou Mitsubishi), Panasonic, Highly (Shanghai Hitachi), Daikin, and Copeland all come to the bowl. Regarding the distribution of the compressor's early product line, household 1P mainly uses its own Lingda, not enough to make a little domestic Mitsubishi, 1.5P is not enough to use Panasonic, 2P is not enough to use Highly, 3P is not enough to use Panasonic, 5P Panasonic, Copeland, large Gold, 10P Daikin. Now that the production capacity has gone up, its own compressor plays a leading role. It sells 32 million units of air conditioners a year and makes a lot of money. The quality is too good. Daikin, Electrolux, a subsidiary of Gome, has come to manufacture about 3 million units. Some people say, how can Daikin be produced by Gree, okay, after disassembly, you will find that Gree and Daikin are exactly the same except for the shell and remote control, and some compressors, especially the circuit board design, a film Come out. Gree is actually the product of the sublimation of Hitachi and Daikin technology. It is the same as our high-speed rail. Apprentices will starve masters in North America, Australia, and Southeast Asia. Gree air-conditioning is everywhere. It is really not covered. With 3 points and 7 points for air-conditioning, Gree is the only company in the air-conditioning market that is directly responsible for the installation of all manufacturers. It is currently the world's largest professional air-conditioning enterprise integrating R&D, production, sales and service. Gree's current line of air-conditioning products has begun to eliminate rare earth compressors. Gree's rare earth-free compressors not only reduce energy consumption and noise, but also ensure that the motor is not demagnetized and more reliable. ◆ Compressor: Mainly produced by TOSOT, followed by Mitsubishi (Guangzhou Mitsubishi) Central ◆ Panasonic, Copeland and Daikin compressors for air conditioning ◆ Circuit board design: stand up, design master style Daikin air conditioner ◆ Internal and external motor: DC motor brand Panasonic DC motor ◆ AC Motor Brand Kaibang AC Motor (Gree Holding) ◆ Compressor package: recycled cotton ◆ Thickness of condenser: 4.5cm ◆ Copper wire tube diameter: 8.5mm ◆ Refrigerant selection: fixed speed air conditioner R22 ◆ The old model of inverter air conditioner is R410A, the new model is R32
2. Midea Midea's market share in the first half of 2018 finally reached 1/4, reaching 25.3%, and 50% of the annual air-conditioning profit was invested in the next year's advertising. This is the same as Xiaobawang (OPPO and VIVO are both, are the bosses of Xiaobawang learning machine) The product of brewing) is the same as the advertising model. The same electric fan started from the United States, and the air conditioner is also colorful, and it cooperates with Toshiba of Japan for mutual benefit. The GMCC and Welling are sound. Toshiba, Mitsubishi (originally from Japan), and Fujitsu compressors are all OEMs of Miji. Midea has China's largest and most complete air-conditioning industry chain and microwave oven industry chain, as well as China's largest and most complete small home appliance product group and kitchen appliance product group. GMCC (GMCC) was founded in 1995. It is a large-scale Sino-Japanese joint venture specializing in the research, development, production and sale of rotary compressors for air conditioning and reciprocating ball bearing refrigerator compressors. It is controlled by China Guangdong Midea Electric Co., Ltd. Japan National Toshiba Carrier Co., Ltd. was established as a shareholder. Welling Motor (Welling) was founded in 1992. It specializes in R&D and manufacturing of motors and their drive systems. The products are widely used in household appliances, cleaning equipment, pump products and industrial automation. Midea has its own compressor, and there are motor resources left over from the era of electric fans. The production of air conditioners is easy. Just because Midea air conditioners are only one of the business units of Midea Group, so the concentration and precision are indeed worse than Gree. Dismantling Midea air conditioners Compared with Gree air conditioners, the difference in welding level and flatness is still a little obvious. Of course, excellent and good are good. ◆ Compressor: Mainly produced by Meizhi Compressor (GMCC) ◆ Meiji compressor (GMCC), Toshiba and Daikin compressors for central air conditioning ◆ Circuit board design: inverted, design master style Panasonic air conditioner ◆ Internal and external motors: DC motor brand Welling DC motor (Midea Holdings), Zhongshan Dayang Plastic Encapsulated DC ◆ Brushless motor ◆ AC Motor Brand Welling AC Motor (Midan Holdings) ◆ Compressor package: recycled cotton ◆ Thickness of condenser: 4.2cm ◆ Copper wire tube diameter: 8.0mm ◆ Refrigerant selection: fixed speed air conditioner R22 ◆ The old model of inverter air conditioner is R410A, the new model is R32 ◆ Electronic expansion valve: Dunan electronic expansion valve
3. Haier In the first half of 2018, Haier's market share was about 10.1%. Haier Machinery obtained the core technology through cooperation with Mitsubishi Heavy Industries in the early days. The name of the air-conditioning company is Mitsubishi Heavy Industries Haier. The quality is certainly not said, fast cooling, high thermal efficiency, beautiful appearance, reasonable cost, frequency conversion and fluorine-free water. Haier started with refrigeration, and is China's first world-famous brand. It is manufactured by the world's top 500 companies and globally. R&D bases include Haier R&D bases in Africa. The first fluorine-free inverter air conditioner in China was manufactured by Haier. Although Haier is the third-largest in the market, Haier does not have its own compressor factory. Haier’s compressors are all low-end and high-end compressors. All imported compressors are used, and they are the best in the world, so they are expensive. They are mainly Qing'an (Xi'an Daikin), Mitsubishi (imported from Thailand), Highly (Shanghai Hitachi), Taikang France and Embra Brazil At the same time, the accessories are also almost all Japanese, and because Haier started as a refrigerator, the air conditioner and the refrigerator are actually similar, so the technical reserve is still a lever. If it is said that the life and stability are stable, the top 3 in the market is well deserved, but if it is service, it can be said, That is SF Express, you are not satisfied with it, it does not exist. . . Since the compressor is in the hands of others, the production capacity is limited. It is very hard like the memory monopolized by South Korea’s Samsung, but it is not enough to produce it. It is true that the profit is eaten more seriously. Of course, Haier is actually very busy. In addition to producing its own air conditioners, the remaining idle production line produces Mitsubishi Heavy Industries' air conditioners, so you can rest assured of quality and technology. ◆ Compressor: Mainly Mitsubishi (imported from Thailand), Highly (Shanghai Hitachi) and Embraco (imported from Brazil) ◆ Mitsubishi compressors (originally from Japan), Copeland and Daikin compressors for central air conditioning ◆ Circuit board design: inverted, design master style Mitsubishi Heavy Industries Haier air conditioner ◆ Internal and external motors: DC motor brand Zhangqiu Haier produces brushless DC motors ◆ AC motor brand Zhangqiu Haier produces AC motors ◆ Compressor package: recycled cotton ◆ Thickness of condenser: 4.3cm ◆ Copper wire tube diameter: 8.0mm ◆ Refrigerant selection: fixed speed air conditioner R22 ◆ Inverter air conditioner is R410A ◆ Electronic Expansion Valve: Japan Fuji Electric Electronic Expansion Valve, Sanhua Electronic Expansion Valve, Dunan Electronic Expansion Valve
4. Hisense Kelon Shanghai Hitachi Highly Compressor. Hisense Kelon sounds the same as OPPO and VIVO. Because Hisense's share is 5.3%, Kelon 2%, because they are a family, two brands. Shandong's 3rd male, Hisense's recent development momentum is very good, I feel like to take Haierbi down, various acquisitions, the old Kelon was lifted by Hisense, and the magic machine was born. Kelon's technical reserve is not less than the magic machine Chunlan 20 years ago, but Chunlan now has a Tmall flagship store, and at most only 2 level energy-efficient air conditioners are slowly forgotten. Hisense and Hitachi cooperated to establish the Shanghai Hitachi Compressor Factory in Shanghai, with the Japanese party accounting for 17% of the shares and retaining two board seats. However, from the brand side, since 2005, they have actively given up the Hitachi brand, while using Hitachi, the quality is stable and first-class , The price is cheap and affordable, exported to the world. Since 17 years, Hisense and Kelon have emerged from the dual-brand strategy and pragmatic configuration. The real machine of the Shenji compressor and matching accessories in the price range of 2000-3000 yuan, let the real material The Haier chrysanthemum upstairs is tight, and then the fourth and third are going to be reversed. ◆ Compressor: Mainly Hitachi (Shanghai Hitachi) ◆ Haili for central air conditioning (Shanghai Hitachi) ◆ Circuit board design: inverted, design master style Hitachi air conditioner ◆ Inside and outside motor: DC motor brand Wolong DC brushless motor ◆ AC Motor Brand Wolong AC Motor ◆ Compressor package: recycled cotton ◆ Thickness of condenser: 3.5cm ◆ Copper wire tube diameter: 7.0mm ◆ Refrigerant selection: fixed speed air conditioner R22 ◆ Inverter air conditioner is R410A ◆ Electronic expansion valve: Sanhua electronic expansion valve, Dunan electronic expansion valve
5. Oaks Oaks, the air conditioner is like Oaks. A market share of less than 4% is a big deal, and a small one. To be honest, in the first half of this year, Oaks belonged to a sudden rise. 15 years ago, 1,000 Yuan used a Mitsubishi compressor. It is still a healthy job behind me, but at that time I wrote the Wolf of the Tram and the Wolf of the Tram. Ma, let's write an air-conditioning guide for Duanyou. Oaks air-conditioning compressor is very interesting, all Japanese goods, 1P uses Mitsubishi (Guangzhou Mitsubishi), 1.5-2P uses Highly (Shanghai Hitachi), 3P Meizhi compressor, and then assemble it, earn a little money, the goods are still acceptable, The relative quality is worse than upstairs. ◆ Compressor: Mainly Mitsubishi (Guangzhou Mitsubishi), Highly (Shanghai Hitachi) ◆ Haili (Shanghai Hitachi) for central air conditioning, Meiji compressor ◆ Circuit board design: inverted, design master style Mitsubishi air conditioner ◆ Internal and external motors: DC motor brand Welling DC motor ◆ AC Motor Brand Welling AC Motor (Midan Holdings) ◆ Compressor package: recycled cotton ◆ Thickness of condenser: 3.5cm ◆ Copper wire tube diameter: 7.0mm ◆ Refrigerant selection: fixed speed air conditioner R22 ◆ Inverter air conditioner is R410A
6. Daikin Daikin, the technology of inverter air conditioner is proposed by Daikin air conditioner. Daikin's energy-saving, quietness and control systems are impeccable. Japan's market share has always remained the first. It is the only one in the world that integrates the development, production and sales of air conditioners, refrigerants and compressors. It is imported and domestically produced. Add up to less than 4% of the market. The Japanese original machine is the existence of the God machine. The domestic high-end version uses Gree OEM. There is nothing to dispute. The quality is as strong as Gree. The price is much more expensive than Gree, but its practicality will not be too different. For imported Daikin air conditioners, those with APF 6.0 or higher, some compressors are from Meiji, and some are from the self-produced value. However, if the domestic Daikin Suzhou is used, then the Xi'an Daikin Qing'an compressor is used. If you can, please think twice before chopping your hands. Please read the list and complaints on Baidu. Because the Japanese APF and domestic indicators are actually different, Japan focuses on heating, and the domestic is balanced, so many people say that Japanese original heating is very cattle, and does not even need auxiliary heating. This is because of geographical location, which is also cooling. Why Wikipedia says: One of the main differences between Japanese brands and domestic brand air conditioners is the reason for heating. ◆ Compressor: Mainly Qing'an (Xi'an Daikin), Lingda Compressor (TOSOT) ◆ Meizhi compressor for central air conditioning ◆ Circuit board design: stand up, design master style Daikin air conditioner ◆ Inside and outside motor: DC motor brand Shibaura DC motor ◆ AC Motor Brand Shibaura AC Motor ◆ Compressor package: recycled cotton ◆ Thickness of condenser: 4.0cm ◆ Copper wire tube diameter: 8.0mm ◆ Refrigerant selection: fixed speed air conditioner R22 ◆ The old model of inverter air conditioner is R410A, the new model is R32 ◆ Electronic expansion valve: Fuji Electric electronic expansion valve
7. Panasonic Panasonic, the domestic market is less than 4%. It is also possible in Japan. The high-end import of digital scroll compressors starts at 20,000 and starts at APF7.0, but it cannot be squeezed by domestic brands. The share is brushed off, because imported air conditioners are too expensive and too expensive, the domestic version, domestic compression The machine is a joint venture of Guangzhou Matsushita Wanbao, and it has no advantage over the three major compressors. The biggest problem is that there is no other customer in the country. Therefore, the enthusiasm for export is not very concerned about the domestic market. It is so slow to launch new ones in China. Although Panasonic has the magic machine Panasonic VE, it is not necessarily what you buy, and the main price in 2018 is the first-level energy efficiency starting price of about 8,000, more than APF4.8, most of the indicators are domestically comparable, Like Daikin air conditioners, APF is heating and cooling. It's all the same. The biggest difference is that the air outlet guide rail is relatively shorter than other domestic brands, so the air conditioning is more dispersed and there will be no strong direct air conditioning feeling. Of course, you can choose the local Japanese model, or the Panasonic ODM, there are surprises. ◆ Compressor: Mainly Panasonic Wanbao (Guangzhou) ◆ Panasonic Wanbao (Guangzhou) for central air conditioning ◆ Circuit board design: inverted, design master style Panasonic air conditioner ◆ Internal and external motors: DC motor brand Welling DC motor ◆ AC Motor Brand Welling AC Motor (Midan Holdings) ◆ Compressor package: recycled cotton ◆ Thickness of condenser: 4.0cm ◆ Copper wire tube diameter: 8.0mm ◆ Refrigerant selection: fixed speed air conditioner R22 ◆ The old model of inverter air conditioner is R410A, the new model is R32 ◆ Electronic expansion valve: Sanhua electronic expansion valve, Dunan electronic expansion valve
8. Mitsubishi Mitsubishi Electric and Mitsubishi Heavy Industries, one mom and two companies. Old China was bombed into ruins by Japanese Mitsubishi Zero fighters. After the war, the factory was converted into civilian. Mitsubishi still retained the military part. The civilian earned money still maintained the military part of the factory first, to ensure that the military factory was always available, so Mitsubishi Technology The foundation is different from others. Mitsubishi Electric cooperated with Shanghai Electric when it landed, but the factory was built in Guangzhou. The compressor technology of Little Japan is relatively advanced, the "keel" motor is well-known, and it has high energy efficiency and fast cooling. The machines sold in Japan are more advanced than our mainland machine models, and many models are not available in China. The world's first wall-mounted air conditioner was born in Mitsubishi, so it has a high evaluation in the industry and is of excellent quality, but domestic Mitsubishi air conditioners are not the best produced. High-end air conditioners are generally sold to Europe and local use, which is relatively backward Only exported to Asia and developing countries. Mitsubishi Electric, which is Guangzhou Mitsubishi in China, has its own compressor production line, which is not only self-sufficient, but also sold to a bunch of domestic niche brands, especially 1P compressors. In addition to the big-name self-produced compressors in the market, other and domestic ones Cars come in line, but cars line up for engines, and air conditioners line up for compressors. Minorities such as Oaks, Yangtze, and Chigo all know Mitsubishi, but Mitsubishi does not necessarily know them. ◆ Compressor: Main Mitsubishi (Guangzhou) ◆ Mitsubishi for central air conditioning (imported from Thailand) ◆ Circuit board design: inverted, design master style Mitsubishi air conditioner ◆ Internal and external motors: DC motor brand Welling DC motor ◆ AC Motor Brand Welling AC Motor (Midan Holdings) ◆ Compressor package: recycled cotton ◆ Thickness of condenser: 4.3cm ◆ Copper wire tube diameter: 8.0mm ◆ Refrigerant selection: fixed speed air conditioner R22 ◆ The old model of inverter air conditioner is R410A, the new model is R32 ◆ Electronic expansion valve: Sanhua electronic expansion valve, Dunan electronic expansion valve
9. Hitachi Hitachi, the imported original machine is impeccable, the domestic version has gradually withdrawn from the first-tier cities, and the inventory has been cleared online. Hitachi is located in the forefront of the world's top 500, and ranks in the top 10 of the world's most respected brands. It has strong scientific and technological strength in the fields of machinery manufacturing, integrated circuits, circuit electronics, nuclear energy, and magnetic levitation trains. For a long time, Hitachi's air-conditioning system has taken scientific and technological progress and technological leadership as its own responsibility, constantly innovating to meet the ever-changing changes in society. Due to the long gap between Hitachi's domestic models and Japan's domestic models, the offline market of domestic models is close to giving up. Offline sales and after-sales have been gradually withdrawn from first-tier cities. Continue to clear inventory through online, please purchase e-commerce , E-commerce will be responsible during the warranty period, please maintain it yourself after the warranty. ◆ Compressor: Hitachi (Shanghai Hitachi), Hitachi (imported from Japan) ◆Hitachi for central air conditioning (imported from Japan) ◆Circuit board design: upright, design master style Hitachi air conditioner ◆Internal and external motor: DC motor brand Panasonic (Hangzhou) DC motor ◆Compressor package: new soundproof cotton ◆Condenser thickness: 4.0cm ◆Copper wire diameter: 8.0mm ◆Refrigerant selection: fixed speed air conditioner R22 ◆The inverter air conditioner is R410A, the new model is R32 ◆Electronic expansion valve: Sanhua electronic expansion valve
10. TCL The TCL air conditioner is guaranteed for 6 years, and the compressor is guaranteed for 10 years, valued at 30 yuan (Jingdong service quotation). TCL uses a relatively rare Taiwan brand compressor. The compressor is provided by TCL Ruizhi (Huizhou) Refrigeration Equipment Co., Ltd., a factory established by TCL and Taiwan Ruizhi. The compressor technology comes from Taiwan and Italy, but the strange thing is that the circuit board design and layout have been imitating Gree. The overall material workmanship is of a medium level and often cut corners. For example, even the first half of the explosion of TCL gold leaf, first-level energy efficiency, APF4. 7. The electronic expansion valve was omitted, leaving the capillary in the wind. The explosion of 618 is R32 refrigerant, and Gree can be benchmarked, but TCL is not Gree, and I feel a little scared. ◆ Compressor: Main TCL Ruizhi (Huizhou) ◆ TCL Ruizhi (Huizhou) for central air conditioning ◆Circuit board design: upside down, design master style Ruizhi air conditioner ◆Internal and external motor: DC motor brand Shibaura DC motor ◆AC Motor Brand Zhongshan Dayang AC Motor ◆Compressor package: recycled cotton ◆Condenser thickness: 3.5cm ◆Copper wire diameter: 7.0mm ◆Refrigerant selection: fixed speed air conditioner R22 ◆The old model of inverter air conditioner is R410A, the new model is R32 ◆Electronic expansion valve: Sanhua electronic expansion valve (produced by October 2017, but not used anymore)
11. Chigo Lifetime spare parts for Chigo Air Conditioners are replaced for free. Chigo Air Conditioner, which started from air conditioner repair, has 18 years of professional manufacturing experience, and has performed very well in domestic and foreign sales, especially w
