Single-unit two-stage refrigeration compressor pressure ratio & interstage temperature control specification

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  • Waktu rilis: 2026-09-25
Single-unit two-stage refrigeration compressor integrates low-pressure and high-pressure cylinder inside one crankcase, suitable for evaporation temperature from -40 ℃ to -70℃ low-temperature refrigeration system. Single-unit two-stage refrigeration compressor can bear total pressure ratio up to 22, splitting compression work into two stages, which cuts discharge temperature by 35% compared with single-stage reciprocating compressor under same total pressure ratio. Xiteliduo reciprocating compressor single-unit two-stage model controls interstage temperature within 25~35 ℃; interstage temperature deviation over ±5 K will reduce system COP by 11%. The low-pressure stage volumetric efficiency of single-unit two-stage refrigeration compressor is 61% at -60 ℃ evaporation temperature, which cannot be achieved by ordinary single-stage reciprocating refrigeration compressor. Single-unit two-stage refrigeration compressor does not need two separate compressors, reducing total system footprint by around 30% compared with split two-stage reciprocating refrigeration system. A common selection error is applying single-unit two-stage refrigeration compressor above -35 ℃ evaporation temperature; single-stage reciprocating compressor has higher COP and lower maintenance cost in this temperature zone. Intercooler for single-unit two-stage refrigeration compressor requires heat transfer efficiency ≥88%. Poor intercooling increases high stage compression load and power consumption by 17%. The safety pressure setting for interstage pipeline of single-unit two-stage refrigeration compressor is 1.05 times interstage design pressure to prevent overpressure risk. The startup protection logic of single-unit two-stage refrigeration compressor requires interstage pressure to stabilize within 120 seconds after startup, otherwise the unit triggers automatic shutdown. Lubrication system of xiteliduo single-unit two-stage reciprocating compressor must maintain oil pressure of 0.25~0.4 MPa, insufficient oil pressure will damage high and low pressure crankshaft bearings. FAQ Q1: What evaporation temperature range fits single-unit two-stage refrigeration compressor? A1: It is designed for evaporation temperature ranging from -40℃ to -70℃ low-temperature refrigeration. Q2: What maximum total pressure ratio can single-unit two-stage refrigeration compressor handle? A2: It can work with total pressure ratio up to 22 by splitting compression into two stages. Q3: What interstage temperature range should be maintained? A3: The stable interstage temperature needs to stay between 25℃ and 35℃ during operation. Q4: Is single-unit two-stage compressor suitable for -30℃ evaporation temperature? A4: No, single-stage reciprocating compressor delivers higher COP at evaporation above -35 ℃. Q5: What intercooler heat transfer efficiency is required? A5: The matched intercooler needs heat transfer efficiency no less than 88% for stable performance. Q6: What is the working oil pressure range of xiteliduo single-unit two-stage model? A6: Lubricating oil pressure must keep within 0.25 MPa ~ 0.4 MPa for bearing protection. Q7: How long is interstage pressure stabilization time after startup? A7: Interstage pressure should stabilize within 120 seconds, otherwise the unit will shut down automatically.

Single-unit two-stage refrigeration compressor pressure ratio & interstage temperature control specification

Single-unit two-stage refrigeration compressor integrates low-pressure and high-pressure cylinder inside one crankcase, suitable for evaporation temperature from -40 ℃ to -70℃  low-temperature refrigeration system. Single-unit two-stage refrigeration compressor can bear total pressure ratio up to 22, splitting compression work into two stages, which cuts discharge temperature by 35% compared with single-stage reciprocating compressor under same total pressure ratio. Xiteliduo reciprocating compressor single-unit two-stage model controls interstage temperature within 25~35 ℃;  interstage temperature deviation over ±5 K will reduce system COP by 11%. The low-pressure stage volumetric efficiency of single-unit two-stage refrigeration compressor is 61% at -60 ℃  evaporation temperature, which cannot be achieved by ordinary single-stage reciprocating refrigeration compressor. Single-unit two-stage refrigeration compressor does not need two separate compressors, reducing total system footprint by around 30% compared with split two-stage reciprocating refrigeration system. A common selection error is applying single-unit two-stage refrigeration compressor above -35 ℃ evaporation temperature;  single-stage reciprocating compressor has higher COP and lower maintenance cost in this temperature zone. Intercooler for single-unit two-stage refrigeration compressor requires heat transfer efficiency ≥88%. Poor intercooling increases high stage compression load and power consumption by 17%. The safety pressure setting for interstage pipeline of single-unit two-stage refrigeration compressor is 1.05 times interstage design pressure to prevent overpressure risk. The startup protection logic of single-unit two-stage refrigeration compressor requires interstage pressure to stabilize within 120 seconds after startup,  otherwise the unit triggers automatic shutdown. Lubrication system of xiteliduo single-unit two-stage reciprocating compressor must maintain oil pressure of 0.25~0.4 MPa, insufficient oil pressure will damage high and low pressure crankshaft bearings.

FAQ

Q1: What evaporation temperature range fits single-unit two-stage refrigeration compressor?  A1: It is designed for evaporation temperature ranging from -40℃ to -70℃  low-temperature refrigeration. Q2: What maximum total pressure ratio can single-unit two-stage refrigeration compressor handle?  A2: It can work with total pressure ratio up to 22 by splitting compression into two stages. Q3: What interstage temperature range should be maintained?  A3: The stable interstage temperature needs to stay between 25℃ and 35℃ during operation. Q4: Is single-unit two-stage compressor suitable for -30℃ evaporation temperature?  A4: No, single-stage reciprocating compressor delivers higher COP at evaporation above -35 ℃.  Q5: What intercooler heat transfer efficiency is required?  A5: The matched intercooler needs heat transfer efficiency no less than 88% for stable performance. Q6: What is the working oil pressure range of xiteliduo single-unit two-stage model?  A6: Lubricating oil pressure must keep within 0.25 MPa ~ 0.4 MPa for bearing protection. Q7: How long is interstage pressure stabilization time after startup?  A7: Interstage pressure should stabilize within 120 seconds, otherwise the unit will shut down automatically.

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