VRF systems
The obvious solution for medium and larger buildings. One high capacity outdoor unit powers a combination of indoor units. VRF or variable refrigerant flow ensures the right heating or cooling at each indoor unit more»
Product selector
A step by step guide to select the right unit or system. The program lets you print out a unique datasheet for your selected solution. more»
E-solution
Mitsubishi Heavy Industries has announced a new version of its E-solution software tool which allows air conditioning application engineers to design and specify complete variable refrigerant flow (VRF) systems in minutes more»
KX6 VRF Systems
R410a refrigerant and compressor design
Component Design
DC fan motors are employed with fan blade design adapted from MHI's aerospace division, with serrated edges that deliver increased air volume with less power input. Electronic expansion valves constantly adjust during operation to ensure the most efficient use of refrigerant, while an up-sized accumulator stores unused refrigerant during low demand periods, optimising the flow of gas-phase refrigerant and oil into the compressor.
Utilising refrigerant R410a
R410a brings many benefits, including being environmentally friendly with a zero ODP (Ozone Depleting Potential) rating. This refrigerant also has much better heat transfer properties than other common refrigerants. Its higher density allows reduced tube diameter in the heat exchangers and inter-connecting pipework, thus reducing the over all amount of refrigerant required in the system.
Compressor design
KX6 uses MHI’s all new 3D scroll compressor, which improves the compression ratio by compressing the refrigerant both radially and axially, delivering dramatically higher energy efficiency than previous models. The strength of the scroll is improved by reducing the height of the inner wrap, which receives a heavy load. MHI has also applied new Vector control to the invertor to improve energy efficiency further, even at low speed.
The 3D scroll compressor has a scroll that is higher at the edges.
A high compression ratio is improved by compressing the refrigerant both radially and axially. Three-dimension compression is more efficient even if the compression ratio is high.
