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Sustainability > Environment > Response to Climate Change > Promoting the Use of Inverter Products

Response to Climate Change

Promoting the Use of Inverter Products

Inverter Technology

Can Reduce Power Consumption by Approx. 30%

The Daikin Group aims to spread the use of highly energy-efficient inverter air conditioners so that consumers use less energy during air conditioner operation and thus emit less CO2.

Inverters are frequency conversion devices that control electrical voltage, current, and frequency. Inverters precisely control the compressor motor, the heart of an air conditioner. Furthermore, with modified conventional motors and heat exchangers, inverter air conditioners use approximately 58% less energy than non-inverter models.

Comparison of energy consumptionNon-inverter air conditioner 100%

Comparison of energy consumptionNon-inverter air conditioner 100%

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Promoting the Use of Inverter Products

Spreading the Use of Inverter Products Worldwide

The Daikin Group aims to spread the use of energy-efficient inverter products so that consumers use less energy during air conditioner operation and thus emit less CO2.

Because inverter products are more expensive than non-inverter products, they have been slow to achieve market penetration in emerging countries. However, in fiscal 2014, we developed an inverter air conditioner at an affordable price especially for the Asian air conditioner market. Such products are gradually achieving greater market penetration due to factors including stricter energy efficiency standards and rising energy awareness among the general public stemming from rising electricity prices in Southeast Asia.

To help promote the spread of inverter products, we are in the process of creating mechanisms to evaluate their energy-efficiency performance. In the past, the most common index for evaluating an air conditioner’s energy-efficiency performance was COP (coefficient of performance), under which the amount of energy consumed was calculated at a fixed efficiency without adjusting for air temperature changes. However, COP cannot be used to properly evaluate the performance of inverter products, which operate at an optimal level depending on the changes in ambient temperature. Therefore, Japan’s air conditioner industry has led calls for a switch to using APF (annual performance factor), and since 2013 APF has been used in ISO standards.

In emerging countries, where APF is starting to come into use, Daikin is working with the Japanese government and industry groups to get APF adopted as the industry standard and to create energy labelling systems as part of support for creating evaluation standards.

Inverter Products as Percentage of All Residential Air Conditioners Worldwide (2015)

Inverter Products as Percentage of All Residential Air Conditioners Worldwide (2015)

Note: Residential air conditioners: Ductless air conditioners other than window and portable type products. Only in North America does the category include duct-type air conditioners for residential use.

Source: Compiled by Daikin based on data from the Japan Refrigeration and Air Conditioning Industries Association

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