Advantages and disadvantages of Hitachi central air conditioning

Advantages and disadvantages of Hitachi central air conditioning At present, the central air-conditioning of the refrigerant system is still the best done by Japanese brands. When it comes to Japanese central air-conditioning, one has to say that Hitachi, one of the Japanese air-conditioning BOSS, is a well-known international central air-conditioning brand. Most air conditioners now use scroll compressors as the core of power, and the world’s first scroll machine for air conditioning was manufactured by Hitachi in 1983. The excellent performance of scroll compressors in refrigeration systems, Today, after more than 20 years, it is still a hotspot for experts and scholars, and Hitachi is always at the forefront of technology. So what are the advantages and disadvantages of Hitachi central air conditioning? What is the situation? Next, I will give you an analysis. In order to pursue fair and equitable comparison, there will be no Tianji horse racing, so I chose the Mitsubishi Electric Lingyao series and Daikin VRV home series with a small price difference to Hitachi VAM-mini. Series for comparison. When we buy a central air conditioner, we only pay attention to a few points: the compressor, refrigeration, heating effect, the place of origin, the performance of the compressor, the quality, the cost-effectiveness, and after-sales service. Let’s take a comprehensive look at Hitachi from these points. , Mitsubishi and Daikin central air-conditioning products. The compressors Daikin, Hitachi, and Mitsubishi Electric are all scroll compressors. The difference is that Hitachi and Daikin are high-pressure chamber scroll compressors, and Mitsubishi Electric is a low-pressure chamber compressor. At present, the strongest scroll compressor technology should be Hitachi. After all, the earliest scroll compressor for air conditioning was invented by Hitachi. Daikin’s high-end central air conditioning models before 2003 used Hitachi compressors. Spotted. At present, Hitachi's scroll compressors are manufactured in Hitachi, Taiwan and Hitachi, Japan. Most of Daikin's air conditioners use domestic compressors. Mitsubishi compressors are partly produced in Shanghai and partly imported from Thailand. Twin rotor for Toshiba. Hitachi VAM-mini series outdoor units use Hitachi's patented high back pressure DC scroll compressor, which integrates Hitachi's decades of scroll compressor manufacturing experience, plus the use of permanent magnet materials and the use of cluster compressor motors And, the design of the asymmetric scroll structure greatly reduces the suction loss and leakage loss, and the operating efficiency is greatly improved. The advantages of the scroll compressor, such as low leakage, high efficiency, low noise, low vibration, and long life, are fully reflected in the outdoor unit of the VAM-mini system. The three core technologies of inverter air conditioners-compressors, inverters, and controllers are all unique to Hitachi and possess the most advanced technologies in the industry. Mitsubishi Electric and Hitachi are the two largest motor manufacturers in Japan. All the 6000KW inverters of Shinkansen inverter locomotives in Japan use Hitachi products. It can be seen that the reliability of Hitachi inverters is very good. The inverters of Mitsubishi Electric are also well-known. It is said that Daikin has not yet developed the ability to produce inverters by itself. The market share of Daikin is the unassailable overlord of home improvement central air conditioning. According to the information I found, the multi-line market share in 2016: Daikin>Hitachi>Mitsubishi Electric. Daikin is ranked first, Hitachi is second, and its market share is far ahead. But Hitachi is not inferior, and it is also the leader in tooling and real estate support. More than 30 of the top 50 real estate decoration projects in the country's real estate are all used by Hitachi. China's largest real estate company Vanke is the only designated air-conditioning brand, many Villa home improvement is to choose Hitachi. Divergent box vs divergent tube The refrigerant transmission of the central air conditioner will use the divergent box or divergent tube. The Hitachi VAM-mini series of domestic central air conditioners use divergent tubes. Mitsubishi Electric uses divergent boxes in China and Daikin uses both domestically. It is a divergent tube. What is the difference between the two? The divergent box is manufactured by the manufacturer, without solder joints, direct connection without the hidden danger of leakage caused by welding, while reducing the length of the machine's copper tube, which reduces the attenuation coefficient of the air conditioner and reduces the burden on the external compressor. The divergent tubes are connected to the indoor unit one by one from the host, which is relatively flexible and free, and can meet different building needs. If it is far away from the external unit, the attenuation coefficient of the air conditioner will be very large. There is also a need to connect the divergent tube to the external or internal unit. Those who perform welding and welding will test the master's technology, and there is a risk of refrigerant leakage. Of course, everything has its advantages and disadvantages. The price of a divergent box is very expensive, at least a thousand yuan, and the divergent tubes of tens of dollars are completely one day and one place. The advantages and disadvantages of Hitachi central air conditioning are environmentally friendly: the use of new refrigerants is relatively convenient for maintenance: the use of divergent tubes for energy saving: Hitachi stepless frequency conversion technology (up to 95 variable speeds) and DC motors are safe and reliable: Hitachi pioneered two-stage oil separation technology intelligence: Smart controller + smart home control system precise temperature regulation: PFC control technology and PAM control technology are moderately priced and operate very quietly. It is not a fully imported heating. The external machine noise is large. The warranty time is less than that of domestic air-conditioning brands. The Hitachi central air conditioner is very energy-efficient, the internal unit is very compact, and the noise control is also good; the quality of the compressor is also trustworthy, the price is very close to the people in the Japanese, and the proportion of imported air-conditioning parts is also very high. Overall, Hitachi central air conditioning is very good. For those who like Japanese air-conditioning brands and pursue the quality of air conditioning, Hitachi central air conditioning is a good choice.

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06/23/2020

Advantages and disadvantages of Hitachi central air conditioning

At present, the central air-conditioning of the refrigerant system is still the best done by Japanese brands. When it comes to Japanese central air-conditioning, one has to say that Hitachi, one of the Japanese air-conditioning BOSS, is a well-known international central air-conditioning brand. Most air conditioners now use scroll compressors as the core of power, and the world’s first scroll machine for air conditioning was manufactured by Hitachi in 1983.

06/23/2020

Make home life easy for a summer

Refrigerators, I believe that every household has its figure, which guarantees the freshness of the food and brings a hint of coolness on the hot summer day. The core component of the refrigerator is the compressor. How does the refrigerator compressor work? Today, let's take a look at the relevant introduction of refrigerator compressor!

06/23/2020

How to solve if the air conditioner is not cooling

If it is not in the cooling state, we can adjust it to the cooling mode; if the dust accumulation of the air conditioner severely reduces the cooling function, we can find professional personnel to disassemble the evaporator, fan blade, and filter. Completely clean up; if it is because no refrigerant is added, then we can add refrigerant.

06/23/2020

The air conditioner suddenly stopped cooling.

1.The air conditioner remote control may not adjust the temperature. 2. It may be that the air conditioner has not been cleaned for too long, which causes dust to accumulate on the filter net, so that the cold air blocking the air conditioner cannot be blown out. 3. There may be leakage of freon in the air conditioner, resulting in too little freon, and the air conditioner is not cooled. 4. Energy saving is due to unstable voltage, which causes the air conditioner to not be cooled. 5. It may be that the number of air conditioners is insufficient, and the small number of horses is not used for cooling in a large area of the house.

06/23/2020

What refrigerator is used for cooling

Most of them use fluorine-free refrigerants, and the models include R600A, R410A, R407A, R134A, etc., which are all green and environmentally friendly. The specific models are marked on the nameplate on the rear side of the refrigerator. the way.

06/23/2020

Which refrigerator is better for cooling

Different cooling methods of refrigerators have different advantages, mainly depending on which cooling method is selected. The direct cooling refrigeration type is cheap, relatively energy-saving, and has good fresh-keeping and moisturizing properties, but the temperature is uneven, and it needs to be defrosted frequently.

06/23/2020

Reasons and solutions of refrigerator not cooling

In the use of refrigerators, when there are more or less problems, I believe many people have encountered the reason why the refrigerator at home does not cool. What will you do when you encounter this situation? How much do you know about the reasons for the refrigerator not cooling? What? The following editor will introduce the reasons and solutions for the refrigerator not cooling, I hope to help you.

06/23/2020

How to add air conditioning refrigerant

Turn off the power supply of the air conditioner first; if all the light leaks, then you must evacuate before adding it; find the thick tube under the outdoor unit and add fluorine from here; you need to install the pressure gauge when adding fluorine Generally, it can be stopped at about 5 pressures; the temperature needs to be turned to the lowest when turning on the machine, and observe for about half an hour.

06/23/2020

What to do if the refrigerator does not cool in winter

1.If it is because of the weather, you need to change the refrigerator to another location. 2. When used in winter, you can turn on a compensation switch in the refrigerator. 3. It is necessary to check whether the compressor is damaged. 4. If the modulation gear is incorrect, you can adjust the gear higher. 5. If the refrigerant is not enough, the problem of non-refrigeration can be solved after the fluorine content is added.

06/23/2020

What is the reason why the freezer is not cooling

It may be that the capillary is blocked and the refrigerant flow does not enter the evaporator. It may also be that the refrigerant needs to be replenished or the refrigeration system is leaking. If the buffer tube inside the compressor ruptures, there may be loose screws or it will cause no cooling. It is also possible that the expansion valve and the discharge valve are not adjusted properly, causing cold air to leak out. Need to check one by one, and then take the medicine.

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Advantages and disadvantages of Hitachi central air conditioning

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