Daikin has been Shaping Air to Your needs Since Defining the Variable Refrigerant Volume Category in 1982.
Variable Refrigerant Volume Has Come Of Age
In a now established product line that has achieved it’s 30th anniversary, benefits such as individual unit controllability, energy-efficient operation, design flexibility and easy installation and maintenance have proven to be highly desirable in the market.
While Variable Refrigerant Volume (VRV) technology was initially installed mainly in small and mid-sized commercial buildings, its obvious advantages over conventional centralised systems for large buildings gradually became apparent. Today, besides widespread installation in structures such as high-rise residential buildings, hotels, shopping centres, hospitals and stadiums, VRV has been used for skyscrapers that rise more than 50 stories high.
Naturally, since the 1982 launch, to make sure that the technology is fit for such broad, general application, on a daily basis, it has been necessary to work on upgrading product performance and continually surpass past improvements.
Coming into the present era, all over the world, energy efficiency has become a priority demand in the air conditioning sector. Believing that general availability of VRV was the most effective way of meeting this need, starting more than 20 years ago, Daikin extended production beyond Japan and set up manufacturing facilities in Belgium, China, Thailand, India, and is even now about to enter into production in Brazil.
Determined to fulfil its role as leader of the air conditioning industry, Daikin will continue its groundbreaking development of VRV and go on meeting expectations with excellent products.
30 Years of Daikin VRV
At its introduction, Daikin’s VRV offered limited centralised controls, consisting of start/stop controls for up to 16 units. In the intervening years, Daikin’s RESEARCH AND DEVELOPMENT team have developed and introduced DIII-Net, a proprietary high speed control communication protocol that revolutionised control systems for Daikin air conditioning hardware.
Today, VRV’s control systems give you the power to centrally manage over 1,000 individual indoor units on a single network, and make it easy to interface with open protocol Building Management Systems (BMS) such as BACNet and LONWORKS, and even control your building remotely via the web.
Performance Improvements, 1982 – 2013
Daikin’s VRV has come a long way since it’s introduction in 1982, thanks to Daikin’s constant, ongoing investment in technology and research and development. Here’s a snapshot of the performance, efficiency and interface improvements we’ve achieved in the past 30 years.
|Energy Efficiency (COP) -7.5kW||2.78||3.54|
|Max. Refrigerant piping length difference
between indoor and outdoor unit
Max refrigerant piping height difference
|Capacity range – outdoor unit||7.5~11.2 kW||3~40 kW|
|Capacity range – indoor unit||1.8 kW||0.6~14.9 kW|
|Max number of connectable indoor units||
|Network Control System||None||
|Target Project Size||5,000 m2 (Approx)||No Limit
(In combination with water cooled VRV)
Ground Breaking Technology
Advanced technology is at the heart of everything Daikin does. These are just some of the technological advances that make VRVIII such an efficient, powerful and easy to install air conditioning solution:
- Variable speed inverter compressors
- Scroll compressors with relief mechanisms
- Contact-less scroll compressors
- Hydraulic Thrust force control
- Reluctance DC motors
- Neodymium magnet motors
- Sensor-less DC inverters
- Sign wave inverters
- Low suction pressure loss discharge gas compressor motor cooling
- Sub cool circuit for longer piping runs
- E-Pass cooling pipe location
- Oil Recovery control logic
- High speed DIII-Net communications protocol
- Advanced controllers such as Intelligent manager, intelligent touch controller, intelligent touch manager, BACNet and LONWORKS Interfaces
- A/C Network Service System
Research and Development
Through ongoing investment in Research and Development, Daikin aims to lead the industry in advanced air conditioning technology, creating value for customers through innovative technologies.
Daikin’s RESEARCH AND DEVELOPMENT process is indispensable for the creation of excellent products that enrich people’s lives. Embodied by the VRV range, Daikin’s multitude of technology and products continue to be at the forefront of the age. At the heart of Daikin’s ability to continually delight and astound our customers is an advanced RESEARCH AND DEVELOPMENT System.
Daikin’s three-pillar system of research, Information Technology and development
To continue to deliver innovative world leading products, Daikin has created two specialised RESEARCH AND DEVELOPMENT divisions: The ‘Environmental Technology Research Laboratory” and the “Solution Product Development Centre”, complimenting Daikin’s “Product Development Group”. These divisions work closely to precisely ascertain customer needs, then develop and commercialise products incorporating advanced technology that gives them the edge over competitor brands.
The Solution Product Development Centre: Integrating Air Conditioners and Information Technology
Computerisation and networking is core to the modern world. Daikin builds advanced networking protocols into the heart of our air conditioning systems, and invests heavily in developing new ways to deliver energy efficiencies and superior comfort levels through networking technology and exchanging information with service centres.
Environmental Technology Research Laboratory: Developing environmentally conscious air conditioning technology
Daikin has established a research laboratory with a dual focus; ‘Air Conditioning” and “The Environment”. With the aim of reducing energy usage in air conditioners, we are developing new technologies with a high efficiency focus for use in innovative HVAC products for the buildings of tomorrow.
Daikin’s VRV engineers do not rest on their laurels. Instead, Daikin continues to invest heavily in research and development to develop more advanced, efficient technologies to suit the changing needs of the modern world. Here are some of the initiatives that are in the pipeline
Super Large Project Integration
- VRV Integration with Daikin’s applied air conditioning systems
- Provision of Cooling, heating, under-floor heating and hot water from a single system
- Provision of Cooling and energy efficient hot water with VRV Heat Recovery
Further COP Gains
- Development of more efficient refrigerant technologies
- Further advancements in compressor and heat exchanger technology
Optimization for Residential Applications
- Connection with Home Automation systems
Diversification of heat energy sources
- Geo thermal
- And more...