a girl is sitting on the sofa in an air-conditioned room

Figure 1: A girl is enjoying herself in the room with an air conditioner.

Scroll Compressor

In summer, what is the best-selling electrical appliance in the electrical market? Air conditioners can be said to be one of the indispensable appliances in the family. They can effectively adjust the indoor temperature so that people live in a comfortable environment.

There are a variety of air conditioner brands on the market. Which brand will you choose? At present, many consumers are comparing two brands, Daikin and Hitachi. This article is going to introduce the difference between them so that you can understand which is better, or is more suitable for you.

Brand Image

Daikin Industries, Ltd was founded in 1924, with leading industry technology and modern management philosophy, and has continuously introduced advanced air conditioner products. Till now, Daikin has more than 100 production bases and sales companies around the world, with over 20,000 employees.

Daikin is the world's only air conditioning professional enterprise integrating the research and development, production, sales and after-sales service of air conditioners, refrigerants and compressors.

daikin air conditioner’s outdoor unit

Figure 2: An outdoor unit of a Daikin air conditioner.

Founded in 1910, Hitachi is one of the world's largest integrated multinational companies. Hitachi air conditioners pioneered scroll compressors in the 1980s, which opened a new chapter for the world refrigeration industry. Hitachi is mainly engaged in variable frequency multi-split type air conditioners.

Sales Volume

There are many good brands in the air conditioning market. Daikin has achieved 12 consecutive years of increased sales and profits, and now ranks first in the world in sales. In 1982, Daikin introduced the VRV system that has quickly spread to the world, with global sales of more than one million sets.

Hitachi is one of the top ten brands of residential air conditioners, whose brand reputation is famous all over the world, among which the Hisense Hitachi air conditioner is the most conspicuous.

This is due to frequency conversion technology, and Hitachi air conditioners are mainly characterized by small size, stable performance, which is one of the preferred brands of household air conditioners.


In the future, frequency conversion air conditioners will play the leading role in the market. As an air conditioning manufacturer for nearly 100 years, Daikin has been committed to professional air conditioning services.

Daikin frequency conversion air conditioning technology has always been the most advanced in the world, and has a high reputation in the refrigeration industry.

Hitachi mainly relies on imported high back-pressure scroll compressors. The rotor of this type of compressor uses neodymium magnetic material, which improves its efficiency. But Daikin is more professional in frequency conversion technology, with higher technical content.

the hitachi central air conditioner

Figure 3: Hitachi central air conditioner’s indoor units are connected to one outdoor unit.

Daikin central air conditioner'S VRV series and Hitachi central air conditioner's VAM series are both high-end products in the central air conditioning industry.

The DC varied-frequency compressor developed by Daikin can always maintain high efficiency when running at full load or part load according to different indoor needs.

In general, both Hitachi and Daikin central air conditioners are excellent. In the key technology, Hitachi has its own development, while Daikin introduces this technology.


Daikin has a higher COP. It can be heated up to 4.36 and IPLV(C) up to 5.8, achieving absolute energy saving and high performance. By comparison, Hitachi's RAS-140FSYNQ, for example, achieves a COP of 4.10, which is slightly less efficient.


Daikin air conditioner’s outdoor unit body is compact, indoor unit’s form and capacity are rich, which are fully integrated with the interior, and design freedom is large. Air conditioning duct length up to 1000m, the maximum single pipe length up to 165m, the external static pressure up to 78.4Pa.

Air conditioning indoor units have 8 series, 65 kinds of capacity, a single system can be connected to a maximum of 64 indoor units, more flexible design, high degree of freedom. It can be used with the fresh air system to meet the personal needs of more people.

A Hitachi outdoor unit can be connected to 9 indoor units of 82 models available, which is of narrower design freedom compared with Daikin.

Heating Performance

The heating principle of Daikin and Hitachi central air conditioners is that the freon inside the compressor is compressed and pressurized as the high temperature and high pressure gas freon.

Then the gaseous CFCS will enter the condenser of the indoor unit for liquefaction and heat release, and then the liquid CFCS will go through the throttling device to decompress into the evaporator of the outdoor unit, and finally return to the compressor. It can be said that its heating effect is outstanding.

I believe you have heard of Daikin and Hitachi. Both brands are Japanese, so they have something in common. But there are differences between the two brands. The sales volume of both is also large, there are a lot of consumers buying them.

the air conditioner interior structure

Figure 4: The internal structure of an air conditioner.

We should pay attention to the most basic two points when buying air conditioners. They are how the effect of refrigeration is, and what the after-sales service is. These two aspects will determine whether we can get comfort and satisfactory service when we use the air conditioner daily. I hope you can choose your preferred one from the above comparison.

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