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Thursday, 30 May 2019, 10:09 HKT/SGT
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Source: Mitsubishi Heavy Industries, Ltd.
MHI Thermal Systems to Launch Four Room Air-Conditioner Models for Cold Regions
Models Meet Standards for Heating Air Conditioners from Hokkaido Electric Power and Tohoku Electric Power

- Non-stop operation limits the falloff in temperature when operating in defrost mode, allowing for operation in heating mode at minus 25degC
- Shorter startup times in morning for comfortable start to heating
- Incorporates function to maintain room temperature at around 10degC, preventing excessive coldness during absences or overnight

TOKYO, May 30, 2019 - (JCN Newswire) - Mitsubishi Heavy Industries Thermal Systems, Ltd., a Group company of Mitsubishi Heavy Industries, Ltd. (MHI), will from mid-July successively launch four models of residential-use air conditioners specifically designed for cold regions. The SXK Series of high-spec models for cold regions are highly energy efficient with an exceptional annual performance factor (APF)(1), and incorporate unique functions to maintain a comfortable living environment in cold areas. These models also use filter holders made from a synthetic resin containing recycled tea leaves(2), marking a major advancement in the efficient use of resources.

All four models incorporate a hot gas bypass non-stop heating system, a first time for an R32 refrigerant home air-conditioner, which limits the falloff in temperature when operating in defrost mode (non-stop heating). The incorporation of this function allows these units to operate in heating mode in temperatures as low as minus 25degC, earning them certification as "Attaka Air-con" recommended by Hokkaido Electric Power Company(3).

The series has also received certification from Tohoku Electric Power Company as "Tohoku Electric Power Company recommended Heating Air-con"(4) for achieving a prescribed energy consumption rate when operated in heat mode at a temperature of minus 15degC. The SXK Series also incorporates a "hot standby" function to shorten heating startup times, a function to keep a room temperature at around 10degC to prevent excessive coldness during absences or overnight, an exterior unit anti-freeze heater to prevent damage to the equipment when the temperature drops, and a snow protection fan control function to prevent the exterior unit's fan from being covered by snow.

The new models will also utilize filter holders made from a synthetic resin containing recycled tea leaves, developed by Ito En Ltd. as part of its Used Tea Leaves Recycling System. This feature has been popular in ordinary air conditioning models. A mass production system for resin molding has been established at MHI Thermal Systems' factory in Thailand.

Further, the SXK Series will incorporate the same interior clean operation function as ordinary models, and can also be used in tandem with three models in the "roomist" SHK Series of hybrid evaporative warm-mist humidifiers sold by MHI Group company Mitsubishi Heavy Industries Air-Conditioning & Refrigeration Corporation. The humidifier starts and stops automatically in response to signals it receives from the air-conditioner's humidity sensor, maintaining the set humidity.

MHI Thermal Systems, with these four cold-region models in its product lineup, will meet a broad range of user needs in Japan.

(1) Annual Performance Factor (APF) is a performance index in which the total capacity needed for heating and cooling throughout the year is divided by the energy consumption of the air conditioner. Larger numbers represent greater energy efficiency.
(2) See "Physiological Functions of Japanese Green Tea Components" from the World Green Tea Association (www.o-cha.net/english).
(3) Guaranteed to operate in heating mode at minus 25degC.
(4) Units that can operate at minus 15degC, and that meet Tohoku Electric Power's standard COP (coefficient of performance) for energy efficiency during heating season.


About Mitsubishi Heavy Industries, Ltd.

Mitsubishi Heavy Industries (MHI) Group is one of the world's leading industrial firms. For more than 130 years, we have channeled big thinking into solutions that move the world forward - advancing the lives of everyone who shares our planet. We deliver innovative and integrated solutions across a wide range of industries, covering land, sea, sky and even space. MHI Group employs 80,000 people across 400 locations, operating in three business domains: "Power Systems," "Industry & Infrastructure," "Aircraft, Defense & Space." We have a consolidated revenue of around 40 billion U.S. Dollars. We aim to contribute to environmental sustainability while achieving global growth, using our leading-edge technologies. By bringing people and ideas together as one, we continue to pave the way to a future of shared success.

For more information, please visit MHI's website: https://www.mhi.com
For Technology, Trends and Tangents, visit MHI's new online media SPECTRA: https://spectra.mhi.com

Contact:
Corporate Communication Department
Mitsubishi Heavy Industries, Ltd.
Email: [email protected]
Tel: +81-(0)3-6275-6278


May 30, 2019 10:09 HKT/SGT
Source: Mitsubishi Heavy Industries, Ltd.

Topic: Press release summary
Sectors: Engineering
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