Loading ...
Loading ...
Loading ...
Advanced Technology
07-08
Cleaning-free Pipe Reuse Technology
<
PUHZ-RP71–200
>
Ability to use existing piping reduces pipe waste and replacement time
No Need to Clean at the Time of System Renewal
Chloride residue builds up in existing pipes and becomes a source of trouble. In addition, the iron particles and slime produced as a result of
compressor failure lead to problems. To counter this, various original Mitsubishi Electric technologies have been combined to enable the introduction
of “cleaning-free pipe reuse.”
This feature is available in the PUHZ-RP71-200
Cautions when using existing piping
•When removing an old air conditioning unit, please make sure to perform the pump-down process and recover the refrigerant and refrigerant oil.
•Check to ensure that the piping diameter and thickness match Mitsubishi Electric specications.
•Check to ensure that the are is compatible with R410A.
Cleaning pipe or replacing with new pipe is required
Result
R22 refrigerant R410A refrigerant
Accelerated deterioration
of refrigerant oil
Problem
High heat generated
during operation
Problem
Chloride residue
Increased chloride
residue
Iron particles and slime
Refrigerant circuit
malfunctions and
causes failure
At time of renewal
At time of
compressor failure
Countermeasure for Problem 1 Countermeasure for Problem 2
Technology 2
Friction Reduction
(moving parts in compressor)
Friction inside the compressor is reduced by using an
original Mitsubishi Electric technology called the
“Heat Caulking Fixing Method” or coating the edge of
the blade in the scroll compressor, thereby
suppressing the increase in temperature that causes
refrigerant oil deterioration.
Technology 1
Original High-quality Filtration
Our original high-quality ltration device called
the “Wide strainer” is equipped inside the
refrigerant inlet and outlet pipe. The “Wide
strainer” traps iron particles and provide
cleaning-free pipe reuse. In addition,
improvements to the metal used in the
bearings of our new scroll compressors provide
more robust units.
Existing piping can be used without cleaning
Why can’t existing piping be used?
Mitsubishi Electric’s Original Replacement Technologies
“Wide strainer”
1 2
see specication on Page 24
Advanced Energy-ecient Technologies
Highly ecient fan and grille for outdoor unit
The shapes of the fan and grille of the outdoor unit have been redesigned,
realising an increase in blowing capacity and more ecient heat exchange
while maintaining the same operating noise level.
Highly ecient heat exchanger
A high density and increase in surface area have improved the
heat-exchange eciency of the heat exchanger.
Fan rear edge
Outdoor unit fan opening increased <PUHZ-RP100-200>
The diameter of the opening for the fan in the outdoor unit has
been increased from 490 to 550mm. Blowing capacity has been
increased while maintaining the same fan rotation speed.
High-density heat exchanger
<PUHZ-RP100-200>
The pipe diameter has been changed
from 9.52 to 7.94mm, resulting in a
high-density heat exchanger.
Grille shape changed
<PUHZ-RP71-200>
The shape of the air outlet grille has been changed to reduce
pressure loss. This has helped to improve heat exchange
performance.
Inexed fan
<PUHZ-RP100-200>
Adoption of a fan with improved ventilation characteristics and
a newly designed rear edge that suppresses wind turbulence
raises fan operation eciency.
Heat-exchange surface area increased
<
PUHZ–RP100–200
>
Heat exchanger size extended horizontally, increasing the
surface area.
Heat exchanger
Heat exchanger
Increase in heat-exchanger surface area
Opening increased
from 490 to 550mm
in diameter
2 lines, 52 columns
2 lines, 64 columns
(
RP100 –200
)
Increasing the pressure of the
refrigerant sent to the compressor
reduces the compression load
w/ HIC circuit
w/o HIC circuit
Heat Interchanger (HIC)
LEV B
LEV C
LEV A
Heat
interchanger
(HIC)
A
A
Indoor
HEX
Outdoor
HEX
Power
receiver
Compressor
Cooling operation
<
PUHZ–RP
•
HA
> <
PUHZ–RP
•
KA
>
<
PUHZ–RP
•
HA
>
(image)
<
PUHZ–RP
•
KA
>
Heat Interchanger
(
HIC
)
Added
<PUHZ-RP140>
A HIC circuit has been added to improve energy eciency during cooling
operation. Liquid refrigerant is rerouted, transformed into a gas state and
injected back into the system to increase overall pressure of the refrigerant
being sent to the compressor, thereby reducing the load on the
compressor and raising eciency.
see specication on Page 24
Loading ...
Loading ...
Loading ...