UK VRF GEN 24 - Flipbook - Page 39
VRF SYSTEMS
VRF SYSTEMS INDEX
Oil recovery intelligent control
Oil recovery intelligent control advantages:
1. Higher efficiency
2. Durability
3. Comfort: continuous operation, low noise and low vibration
Intelligent 3-stage oil management system
In a VRF system, where lengthy piping and a large number
of indoor units need to be controlled collectively, the key to
maintaining the system’s reliability is to ensure an
appropriate amount of oil is secured in the compressors.
In order to avoid oil shortage in the compressor, maximum
operation is normally forcibly conducted at regular
intervals to recover oil from indoor units. This method,
typically employed in a standard VRF, causes the system to
overheat or overcool and thus waste energy.
In Panasonic VRF systems, a sensor for detecting oil
levels is mounted in each compressor. In installations with
multiple outdoor units, a shortage of oil in one
compressor can be compensated for by recovering oil
either from another compressor in the same unit, from a
compressor in an adjacent outdoor unit, or from
connected indoor units. Panasonic VRF systems provide
users with a comfortable environment whilst saving
energy.
Features of oil recovery design
Oil sensors installed in each compressor.
Oil sensors installed in each Panasonic compressor
precisely monitor oil levels, eliminating unnecessary oil
recovery.
The Panasonic system efficiently manages oil recovery in
three stages; minimising the frequency of forced oil
recovery while reducing energy cost and maintaining
comfort.
STAGE-1: Panasonic compressors are equipped with
sensors which monitor oil levels precisely at all times. If
oil levels fall, oil can be transferred from other
compressors within the same outdoor unit.
STAGE-2: If oil levels in all compressors within the
outdoor unit fall, oil can be replenished from adjacent
outdoor units.
STAGE-3: Forced oil recovery is implemented only if oil
levels become insufficient in spite of above measures. The
Panasonic system’s design concept is radically different
from conventional oil systems.
Highly functional oil separator.
Thanks to extended separate piping, oil recovery efficiency
reaches 90%, minimising the oil discharged from the
compressor.
1 | Minimum oil level
(surface of rotary
cylinder)
2
1
2 | In Panasonic VRF
systems, a sensor for
detecting oil levels is
installed in each
compressor.
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