Danfoss PSH052 Application Manual page 6

Scroll compressors PSH052 to PSH105 | Introduction
Introduction
Product description
Danfoss scroll compressor PSH for R410A and R454B is available as single compressor and can be assembled in
tandem or trio combinations.
PSH series scroll compressor bene t from an improved design to achieve the highest e ciency and increased life
time.
Figure 1: Cut Away PSH052-105
How do IDVs work?
Figure 2: Intermediate Discharge Valve (IDV)
© Danfoss | Climate Solutions | 2024.12
1 Intermediate discharge valves (IDVs) increase
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seasonal e ciency
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2 Internal Non Return Valve (INRV) prevents
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excessive leak rate from high pressure side
3 Heat shield lowers the heat transfer between
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discharge and suction gas and the acoustic level
4 Integrated discharge gas temperature protection
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(DGT)
5 Built in pressure ratio optimization dedicated to
heat pump application
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6 Lead free polymer bearings improve behavior
under poor lubrication conditions
7 Patented gas path ow with gas intake design
induces higher resistance to liquid slugging
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8 Injection port to both enlarge the application
envelope and improve e ciency
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