Trane TRG-TRC004-EN manual Phvklqjsrlqw

Page 19

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Compressor Types

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		Figure 18

Viewing the compressor from the opposite side shows that continued rotation of the meshed rotor lobes drives the trapped refrigerant vapor (to the right), toward the discharge end of the compressor, ahead of the meshing point. This action progressively reduces the volume of the pockets, compressing the refrigerant.

Finally, when the pockets of refrigerant reach the discharge port, the compressed vapor is released and the rotors force the remaining refrigerant from the pockets.

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Figure 19

In this example helical-rotary compressor, refrigerant vapor is drawn into the compressor through the suction opening and passes through the motor, cooling it. The refrigerant vapor is drawn into the compressor rotors where it is compressed and discharged out of the compressor.

12	TRG-TRC004-EN

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Contents Air Conditioning Clinic Refrigeration Compressors Business Reply Mail One of the Fundamental Series Comment CardRefrigeration Compressors 5HIULJHUDWLRQ&RPSUHVVRUV PrefaceContents TRG-TRC004-EN 9DSRU&RPSUHVVLRQ5HIULJHUDWLRQ Introduction5HIULJHUDWLRQ&\FOH RPSUHVVRU7\SHV Compressor TypesReciprocating Compressor 5HFLSURFDWLQJ&RPSUHVVRUFrpsuhvvlrq Vwurnh Rshqlqj Glvfkdujh Slvwrq Scroll Compressor 6FUROO&RPSUHVVRUMrxuqdo Lqwdnh Skdvh Frpsuhvvlrq Glvfkdujh Helical-Rotary Screw Compressor +HOLFDO5RWDU\6FUHZ&RPSUHVVRU+HOLFDO5RWDU\&RPSUHVVRU Phvklqjsrlqw Centrifugal Compressor HQWULIXJDO&RPSUHVVRUYroxwh Gliixvhu Sdvvdjhv Udgldo Lpshoohu Eodghv Uhiuljhudqw 2SHQ&RPSUHVVRU 6HPLKHUPHWLF&RPSUHVVRU +HUPHWLF&RPSUHVVRU0HWKRGVRI&RPSUHVVRU8QORDGLQJ Compressor Capacity ControlCylinder Unloaders \OLQGHU8QORDGHUVXqordghufrqwuroohu Vrohqrlgydoyh Ydoyh DSDFLW\9HUVXV6XFWLRQ7HPSHUDWXUH RPSUHVVRU8QORDGLQJ $OWHUQDWLQJ&\OLQGHUV2QDQG2II \FOLQJ6FUROO&RPSUHVVRUV \FOLQJ2QDQG2IICycling On and Off \FOLQJ6FUROO&RPSUHVVRUV Slide Valve 6OLGH9DOYHInlet Vanes QOHW9DQHVInlet vanes presented in this section of the clinic Variable Speed 9DULDEOH6SHHG\VWHP/HYHO&RQWURO Compressor in a SystemSystem-Level Control RQVWDQW9ROXPH6\VWHP KLOOHGDWHU6\VWHP 9DULDEOH$LU9ROXPH6\VWHPPreventing Evaporator Freeze-Up 6HQVLQJ6XFWLRQ7HPSHUDWXUH +RW*DV%\SDVVWRYDSRUDWRU,QOHW +RW*DV%\SDVVWR6XFWLRQ/LQH System Components clinic 5HYLHZ²3HULRG2QH Review5HYLHZ²3HULRG7ZR \VWHPOHYHOFRQWURO 5HYLHZ²3HULRG7KUHHFor more information, refer to the following references TRG-TRC004-EN Questions for Period QuizAnswers Glossary Glossary Glossary Trane Company