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Optimize scroll sets PR, combine vapor injection,
and optimize
efficiency
in heat pump application
Increase injection pipe diameter, and reduce pipe
vibration
Optimize structure design, reduce compressor
acoustic at high speed
New designed high
efficiency
motor, improve
efficiency
at Part- load condition
Oil strainer reduce the oil stirring when
compressor running
Compact compressor outline design,
beneficial
for
system unit layout
Introduction
Product description
Danfoss scroll compressor VCH115 for R410A is optimized for China low ambient heat pump and modular chiller
application.
Cut Away VCH115
Figure 1: Cut Away VCH115
Vapor injection
The VCH115 compressor is
fitted
with an injection port that enables to carry out vapor injection by connecting an
intermediate exchanger.
This vapor injection will have three
benefits:
• Operating envelope enlargement by reduction of resulting discharge temperature.
• Cooling capacity and cooling
efficiency
improvement by reduction of the liquid temperature before expansion
(Intermediate exchanger acting as economizer).
• Heat capacity and heating
efficiency
improvement by increase of the
massflow
at the condenser side (condenser
massflow
will be the sum of the evaporator
massflow
and the injected
massflow).
The diagrams below explain the vapor injection principle, considering:
m inj:
Injected
massflow
ΔT IntX:
Difference
of temperature between the outlet of intermediate exchanger and the intermediate pressure
bubble point.
© Danfoss | Climate Solutions | 2023.08
AB392939083370en-000202 | 5
Scroll compressors, VCH115 | Introduction
