134:: by using a spring-loaded piston with an electromagnet connected to AC through a diode. The spring-loaded piston is the only moving part, and it is placed in the center of the electromagnet. During the positive cycle of the AC, the diode allows energy to pass through the electromagnet, generating a magnetic field that moves the piston backwards, compressing the spring, and generating suction. During the negative cycle of the AC, the diode blocks current flow to the electromagnet, letting the spring uncompress, moving the piston forward, and compressing the refrigerant. The compressed refrigerant is then released by a valve.
25:
200:. Compressors of this type have less noise, and are more energy efficient than conventional refrigerator compressors. The Embraco linear compressors are also claimed to be oil-free. In the 2010s and 2020s, multiple lawsuits in the United States alleged that the LG compressors had a high rate of failure or lack of expected cooling. As of 2024, there were settlements and ongoing cases.
188:
The single piston linear compressor uses dynamic counterbalancing, where an auxiliary movable mass is flexibly attached to a movable piston assembly and to the stationary compressor casing using auxiliary mechanical springs with zero vibration export at minimum electrical power and current consumed
129:
where the piston moves along a linear track to minimize friction and reduce energy loss during conversion of motion. This technology has been successfully used in cryogenic applications which must be oil-less. The suspension spring can be flexure type or coil type. An oil-free valved linear
1803:
296:
1753:
1783:
1798:
349:
Reed, Jaime; Dadd, Mike; Bailey, Paul; Petach, Michael; Raab, Jeff (2005). "Development of a valved linear compressor for a satellite borne J–T cryocooler".
1291:
540:
438:
1793:
1725:
227:
1598:
1758:
1720:
1581:
463:
42:
1623:
1336:
872:
601:
232:
108:
258:
692:
89:
1773:
1587:
967:
61:
1929:
531:
46:
1735:
1679:
1674:
1251:
779:
321:
68:
1296:
847:
768:
727:
1924:
1639:
1441:
952:
887:
805:
717:
581:
196:
Linear compressors are made by LG and used in LG and
Kenmore refrigerators. Linear compressors were also announced by
1788:
1669:
1376:
1141:
985:
75:
1841:
1700:
1664:
1466:
1096:
1051:
979:
831:
774:
1914:
1888:
1710:
1406:
1006:
785:
676:
661:
398:
57:
1883:
1808:
1730:
1659:
1603:
1535:
1431:
1346:
1256:
1221:
697:
492:
165:
35:
423:
1873:
1835:
1715:
1426:
857:
151:
1919:
1893:
1571:
1530:
1246:
917:
737:
464:"People say pricey refrigerator compressors are conking out within a few years, sometimes just months"
1695:
1685:
1629:
1566:
1461:
1041:
990:
556:
358:
1561:
1551:
1525:
1311:
973:
882:
852:
752:
722:
616:
576:
215:
1824:
1768:
1705:
1482:
1361:
1356:
1146:
957:
942:
524:
143:
130:
compressor enables the design of compact heat exchangers. Linear compressors work similarly to a
82:
1396:
1351:
1106:
1101:
1031:
927:
763:
566:
237:
509:
1863:
1618:
1613:
1196:
902:
800:
795:
790:
707:
366:
273:
1858:
1830:
1472:
1386:
1381:
1326:
1316:
1306:
1236:
1176:
1091:
1076:
897:
892:
867:
862:
732:
656:
221:
362:
1608:
1505:
1281:
1261:
1226:
1161:
1081:
922:
912:
821:
671:
641:
596:
591:
126:
1908:
1690:
1541:
1436:
1401:
1171:
1166:
1121:
1116:
962:
937:
932:
907:
877:
747:
646:
626:
606:
517:
370:
1868:
1546:
1446:
1421:
1416:
1411:
1341:
1276:
1156:
1126:
1066:
1061:
1036:
947:
826:
742:
666:
651:
636:
384:
277:
209:
177:
158:
1878:
1520:
1477:
1451:
1391:
1371:
1366:
1241:
1201:
1186:
1131:
1056:
1026:
1021:
837:
702:
621:
173:
24:
1634:
1556:
1487:
1456:
1331:
1301:
1231:
1181:
1151:
1136:
1111:
1016:
816:
712:
631:
571:
1593:
1271:
1266:
1216:
1191:
1046:
842:
190:
1576:
1510:
1011:
811:
611:
586:
561:
493:"Super-efficient linear compressor could vastly reduce air con power use"
131:
1086:
758:
197:
1763:
1515:
1321:
1071:
193:. Linear compressors are used as they have fewer mechanical losses.
1778:
1211:
172:
The first market introduction of a linear compressor to compress
1286:
1206:
513:
439:"LG Settles Class-Action Lawsuit Over Refrigerator Compressors"
18:
16:
Gas compressor where the piston is driven by a linear actuator
322:"Problems 4.7 - A Home Refrigerator (updated 3/15/13)"
142:
A number of patents for linear compressors powered by
1851:
1817:
1744:
1648:
1496:
999:
685:
547:
218: – Device to increase pressure of hydrogen gas
49:. Unsourced material may be challenged and removed.
259:"A review of linear compressors for refrigeration"
462:Roher, Christine; Johnson, Carolyn (2023-12-19).
424:"Embraco claims oil-less compressor breakthrough"
344:
342:
212: – Machine to increase pressure of a fluid
525:
8:
224: – Liquid state of the element hydrogen
146:were issued in the 20th century, including:
291:
289:
287:
1292:High efficiency glandless circulating pump
541:Heating, ventilation, and air conditioning
532:
518:
510:
109:Learn how and when to remove this message
1726:Mold growth, assessment, and remediation
249:
266:International Journal of Refrigeration
228:Timeline of low-temperature technology
1599:Programmable communicating thermostat
399:"Oil-less linear compressor launched"
7:
1721:Mechanical, electrical, and plumbing
297:"Espacenet : Original document"
47:adding citations to reliable sources
154:, GB191215963, published 1913-10-08
1582:Minimum efficiency reporting value
14:
1624:Standard temperature and pressure
1337:Packaged terminal air conditioner
873:Passive daytime radiative cooling
602:Heat pump and refrigeration cycle
437:Wroclawski, Daniel (2020-09-17).
233:Timeline of hydrogen technologies
168:, US1615133, published 1927-01-18
693:Absorption-compression heat pump
371:10.1016/j.cryogenics.2005.03.007
161:, CA245708, published 1924-12-30
23:
1588:Normal temperature and pressure
968:Vapor-compression refrigeration
34:needs additional citations for
278:10.1016/j.ijrefrig.2017.08.015
1:
1736:Testing, adjusting, balancing
1680:Building information modeling
1675:Building services engineering
1252:Ground-coupled heat exchanger
780:Demand controlled ventilation
728:Building insulation materials
1297:High-pressure cut-off switch
848:Ice storage air conditioning
769:Dedicated outdoor air system
189:by the motor. It is used in
1640:Thermostatic radiator valve
1442:Thermostatic radiator valve
953:Underfloor air distribution
888:Radiant heating and cooling
806:Energy recovery ventilation
718:Automobile air conditioning
582:Domestic energy consumption
1946:
1789:Institute of Refrigeration
1670:Architectural technologist
1142:Electrostatic precipitator
1842:Volatile organic compound
1701:Environmental engineering
1665:Architectural engineering
1467:Ultra-low particulate air
1052:Automatic balancing valve
980:Variable refrigerant flow
832:Heat recovery ventilation
775:Deep water source cooling
491:Blain, Loz (2021-11-03).
1889:Template:Home automation
1711:Kitchen exhaust cleaning
1407:Solar-assisted heat pump
1007:Air conditioner inverter
786:Displacement ventilation
677:Vapour pressure of water
662:Thermal destratification
184:Valved linear compressor
1884:World Refrigeration Day
1731:Refrigerant reclamation
1660:Architectural acoustics
1604:Programmable thermostat
1536:Clean air delivery rate
1432:Thermal expansion valve
1347:Pressurisation ductwork
1257:Ground source heat pump
698:Absorption refrigerator
301:Worldwide.espacenet.com
152:Brown, Boveri & Cie
1874:Glossary of HVAC terms
1836:Sick building syndrome
1716:Mechanical engineering
1427:Smoke exhaust ductwork
858:Mixed-mode ventilation
1930:Hydrogen technologies
1894:Template:Solar energy
1572:Intelligent buildings
1531:Carbon dioxide sensor
918:Room air distribution
738:Central solar heating
1696:Duct leakage testing
1686:Deep energy retrofit
1630:Thermographic camera
1567:Infrared thermometer
1042:Air source heat pump
991:Water heat recycling
557:Air changes per hour
166:Raúl Pateras Pescara
43:improve this article
1562:HVAC control system
1552:Home energy monitor
1526:Building automation
1312:Inverter compressor
974:Variable air volume
883:Passive ventilation
853:Kitchen ventilation
753:Constant air volume
723:Autonomous building
385:"Linear compressor"
363:2005Cryo...45..496R
257:Liang, Kun (2017).
216:Hydrogen compressor
144:free-piston engines
58:"Linear compressor"
1925:Cooling technology
1825:Indoor air quality
1769:ASTM International
1706:Hydronic balancing
1483:Wood-burning stove
1362:Radiator reflector
1147:Evaporative cooler
958:Underfloor heating
943:Thermal insulation
1902:
1901:
1818:Health and safety
1397:Scroll compressor
1352:Process duct work
1107:Convection heater
1102:Condensing boiler
1032:Air-mixing plenum
928:Solar combisystem
764:Cross ventilation
567:Building envelope
238:Scroll compressor
123:linear compressor
119:
118:
111:
93:
1937:
1864:Building science
1619:Smart thermostat
1614:Room temperature
1197:Fireplace insert
903:Radon mitigation
801:Electric heating
796:District heating
791:District cooling
708:Air conditioning
534:
527:
520:
511:
506:
504:
503:
478:
477:
475:
474:
459:
453:
452:
450:
449:
443:Consumer Reports
434:
428:
427:
420:
414:
413:
411:
410:
395:
389:
388:
381:
375:
374:
346:
337:
336:
334:
332:
318:
312:
311:
309:
307:
293:
282:
281:
263:
254:
114:
107:
103:
100:
94:
92:
51:
27:
19:
1945:
1944:
1940:
1939:
1938:
1936:
1935:
1934:
1915:Gas compressors
1905:
1904:
1903:
1898:
1859:ASHRAE Handbook
1847:
1831:Passive smoking
1813:
1746:
1740:
1652:
1650:
1644:
1498:
1492:
1473:Whole-house fan
1387:Run-around coil
1382:Reversing valve
1327:Mechanical room
1317:Kerosene heater
1307:Infrared heater
1237:Gasoline heater
1177:Fan filter unit
1092:Condensate pump
1077:Centrifugal fan
995:
898:Radiant heating
893:Radiant cooling
868:Passive cooling
863:Microgeneration
733:Central heating
681:
657:Thermal comfort
549:
543:
538:
501:
499:
490:
487:
482:
481:
472:
470:
468:NBC Los Angeles
461:
460:
456:
447:
445:
436:
435:
431:
422:
421:
417:
408:
406:
397:
396:
392:
383:
382:
378:
348:
347:
340:
330:
328:
320:
319:
315:
305:
303:
295:
294:
285:
261:
256:
255:
251:
246:
222:Liquid hydrogen
206:
186:
140:
115:
104:
98:
95:
52:
50:
40:
28:
17:
12:
11:
5:
1943:
1941:
1933:
1932:
1927:
1922:
1917:
1907:
1906:
1900:
1899:
1897:
1896:
1891:
1886:
1881:
1876:
1871:
1866:
1861:
1855:
1853:
1849:
1848:
1846:
1845:
1839:
1833:
1828:
1821:
1819:
1815:
1814:
1812:
1811:
1806:
1801:
1796:
1791:
1786:
1781:
1776:
1771:
1766:
1761:
1756:
1750:
1748:
1742:
1741:
1739:
1738:
1733:
1728:
1723:
1718:
1713:
1708:
1703:
1698:
1693:
1688:
1683:
1677:
1672:
1667:
1662:
1656:
1654:
1646:
1645:
1643:
1642:
1637:
1632:
1627:
1621:
1616:
1611:
1609:Psychrometrics
1606:
1601:
1596:
1591:
1585:
1579:
1574:
1569:
1564:
1559:
1554:
1549:
1544:
1539:
1533:
1528:
1523:
1518:
1513:
1508:
1506:Air flow meter
1502:
1500:
1494:
1493:
1491:
1490:
1485:
1480:
1475:
1470:
1464:
1459:
1454:
1449:
1444:
1439:
1434:
1429:
1424:
1419:
1414:
1409:
1404:
1399:
1394:
1389:
1384:
1379:
1374:
1369:
1364:
1359:
1354:
1349:
1344:
1339:
1334:
1329:
1324:
1319:
1314:
1309:
1304:
1299:
1294:
1289:
1284:
1282:Heating system
1279:
1274:
1269:
1264:
1262:Heat exchanger
1259:
1254:
1249:
1244:
1239:
1234:
1229:
1227:Gas compressor
1224:
1219:
1214:
1209:
1204:
1199:
1194:
1189:
1184:
1179:
1174:
1169:
1164:
1162:Expansion tank
1159:
1154:
1149:
1144:
1139:
1134:
1129:
1124:
1119:
1114:
1109:
1104:
1099:
1094:
1089:
1084:
1082:Ceramic heater
1079:
1074:
1069:
1064:
1059:
1054:
1049:
1044:
1039:
1034:
1029:
1024:
1019:
1014:
1009:
1003:
1001:
997:
996:
994:
993:
988:
983:
977:
971:
965:
960:
955:
950:
945:
940:
935:
930:
925:
923:Solar air heat
920:
915:
913:Renewable heat
910:
905:
900:
895:
890:
885:
880:
875:
870:
865:
860:
855:
850:
845:
840:
835:
829:
824:
822:Forced-air gas
819:
814:
809:
803:
798:
793:
788:
783:
777:
772:
766:
761:
756:
750:
745:
740:
735:
730:
725:
720:
715:
710:
705:
700:
695:
689:
687:
683:
682:
680:
679:
674:
672:Thermodynamics
669:
664:
659:
654:
649:
644:
642:Psychrometrics
639:
634:
629:
624:
619:
614:
609:
604:
599:
597:Gas compressor
594:
592:Fluid dynamics
589:
584:
579:
574:
569:
564:
559:
553:
551:
545:
544:
539:
537:
536:
529:
522:
514:
508:
507:
486:
485:External links
483:
480:
479:
454:
429:
415:
390:
376:
357:(7): 496–500.
338:
313:
283:
248:
247:
245:
242:
241:
240:
235:
230:
225:
219:
213:
205:
202:
185:
182:
170:
169:
162:
155:
139:
136:
127:gas compressor
117:
116:
99:September 2014
31:
29:
22:
15:
13:
10:
9:
6:
4:
3:
2:
1942:
1931:
1928:
1926:
1923:
1921:
1918:
1916:
1913:
1912:
1910:
1895:
1892:
1890:
1887:
1885:
1882:
1880:
1877:
1875:
1872:
1870:
1867:
1865:
1862:
1860:
1857:
1856:
1854:
1850:
1843:
1840:
1837:
1834:
1832:
1829:
1826:
1823:
1822:
1820:
1816:
1810:
1807:
1805:
1802:
1800:
1797:
1795:
1792:
1790:
1787:
1785:
1782:
1780:
1777:
1775:
1772:
1770:
1767:
1765:
1762:
1760:
1757:
1755:
1752:
1751:
1749:
1747:organizations
1743:
1737:
1734:
1732:
1729:
1727:
1724:
1722:
1719:
1717:
1714:
1712:
1709:
1707:
1704:
1702:
1699:
1697:
1694:
1692:
1691:Duct cleaning
1689:
1687:
1684:
1681:
1678:
1676:
1673:
1671:
1668:
1666:
1663:
1661:
1658:
1657:
1655:
1647:
1641:
1638:
1636:
1633:
1631:
1628:
1625:
1622:
1620:
1617:
1615:
1612:
1610:
1607:
1605:
1602:
1600:
1597:
1595:
1592:
1589:
1586:
1583:
1580:
1578:
1575:
1573:
1570:
1568:
1565:
1563:
1560:
1558:
1555:
1553:
1550:
1548:
1545:
1543:
1542:Control valve
1540:
1537:
1534:
1532:
1529:
1527:
1524:
1522:
1519:
1517:
1514:
1512:
1509:
1507:
1504:
1503:
1501:
1495:
1489:
1486:
1484:
1481:
1479:
1476:
1474:
1471:
1468:
1465:
1463:
1462:Turning vanes
1460:
1458:
1455:
1453:
1450:
1448:
1445:
1443:
1440:
1438:
1437:Thermal wheel
1435:
1433:
1430:
1428:
1425:
1423:
1420:
1418:
1415:
1413:
1410:
1408:
1405:
1403:
1402:Solar chimney
1400:
1398:
1395:
1393:
1390:
1388:
1385:
1383:
1380:
1378:
1375:
1373:
1370:
1368:
1365:
1363:
1360:
1358:
1355:
1353:
1350:
1348:
1345:
1343:
1340:
1338:
1335:
1333:
1330:
1328:
1325:
1323:
1320:
1318:
1315:
1313:
1310:
1308:
1305:
1303:
1300:
1298:
1295:
1293:
1290:
1288:
1285:
1283:
1280:
1278:
1275:
1273:
1270:
1268:
1265:
1263:
1260:
1258:
1255:
1253:
1250:
1248:
1245:
1243:
1240:
1238:
1235:
1233:
1230:
1228:
1225:
1223:
1220:
1218:
1215:
1213:
1210:
1208:
1205:
1203:
1200:
1198:
1195:
1193:
1190:
1188:
1185:
1183:
1180:
1178:
1175:
1173:
1172:Fan coil unit
1170:
1168:
1165:
1163:
1160:
1158:
1155:
1153:
1150:
1148:
1145:
1143:
1140:
1138:
1135:
1133:
1130:
1128:
1125:
1123:
1120:
1118:
1117:Cooling tower
1115:
1113:
1110:
1108:
1105:
1103:
1100:
1098:
1095:
1093:
1090:
1088:
1085:
1083:
1080:
1078:
1075:
1073:
1070:
1068:
1065:
1063:
1060:
1058:
1055:
1053:
1050:
1048:
1045:
1043:
1040:
1038:
1035:
1033:
1030:
1028:
1025:
1023:
1020:
1018:
1015:
1013:
1010:
1008:
1005:
1004:
1002:
998:
992:
989:
987:
984:
981:
978:
975:
972:
969:
966:
964:
963:Vapor barrier
961:
959:
956:
954:
951:
949:
946:
944:
941:
939:
938:Solar heating
936:
934:
933:Solar cooling
931:
929:
926:
924:
921:
919:
916:
914:
911:
909:
908:Refrigeration
906:
904:
901:
899:
896:
894:
891:
889:
886:
884:
881:
879:
878:Passive house
876:
874:
871:
869:
866:
864:
861:
859:
856:
854:
851:
849:
846:
844:
841:
839:
836:
833:
830:
828:
825:
823:
820:
818:
815:
813:
810:
807:
804:
802:
799:
797:
794:
792:
789:
787:
784:
781:
778:
776:
773:
770:
767:
765:
762:
760:
757:
754:
751:
749:
748:Chilled water
746:
744:
741:
739:
736:
734:
731:
729:
726:
724:
721:
719:
716:
714:
711:
709:
706:
704:
701:
699:
696:
694:
691:
690:
688:
684:
678:
675:
673:
670:
668:
665:
663:
660:
658:
655:
653:
650:
648:
647:Sensible heat
645:
643:
640:
638:
635:
633:
630:
628:
627:Noise control
625:
623:
620:
618:
615:
613:
610:
608:
607:Heat transfer
605:
603:
600:
598:
595:
593:
590:
588:
585:
583:
580:
578:
575:
573:
570:
568:
565:
563:
560:
558:
555:
554:
552:
546:
542:
535:
530:
528:
523:
521:
516:
515:
512:
498:
494:
489:
488:
484:
469:
465:
458:
455:
444:
440:
433:
430:
425:
419:
416:
404:
400:
394:
391:
386:
380:
377:
372:
368:
364:
360:
356:
352:
345:
343:
339:
327:
323:
317:
314:
302:
298:
292:
290:
288:
284:
279:
275:
271:
267:
260:
253:
250:
243:
239:
236:
234:
231:
229:
226:
223:
220:
217:
214:
211:
208:
207:
203:
201:
199:
194:
192:
183:
181:
180:was in 2001.
179:
175:
167:
163:
160:
156:
153:
149:
148:
147:
145:
137:
135:
133:
128:
124:
113:
110:
102:
91:
88:
84:
81:
77:
74:
70:
67:
63:
60: –
59:
55:
54:Find sources:
48:
44:
38:
37:
32:This article
30:
26:
21:
20:
1920:Vacuum pumps
1869:Fireproofing
1653:and services
1649:Professions,
1547:Gas detector
1447:Trickle vent
1422:Smoke damper
1417:Smoke canopy
1412:Space heater
1342:Plenum space
1277:Heating film
1157:Exhaust hood
1127:Dehumidifier
1067:Blast damper
1062:Barrier pipe
1037:Air purifier
948:Thermosiphon
827:Free cooling
743:Chilled beam
667:Thermal mass
652:Stack effect
637:Particulates
617:Infiltration
548:Fundamental
500:. Retrieved
496:
471:. Retrieved
467:
457:
446:. Retrieved
442:
432:
418:
407:. Retrieved
405:. 2014-03-20
403:Cooling Post
402:
393:
379:
354:
350:
329:. Retrieved
325:
316:
304:. Retrieved
300:
269:
265:
252:
210:Booster pump
195:
187:
178:refrigerator
171:
159:Hugo Junkers
141:
122:
120:
105:
96:
86:
79:
72:
65:
53:
41:Please help
36:verification
33:
1879:Warm Spaces
1521:Blower door
1499:and control
1497:Measurement
1478:Windcatcher
1452:Trombe wall
1392:Sail switch
1372:Refrigerant
1367:Recuperator
1242:Grease duct
1202:Freeze stat
1187:Fire damper
1057:Back boiler
1027:Air ionizer
1022:Air handler
986:Ventilation
838:Hybrid heat
703:Air barrier
622:Latent heat
272:: 253–273.
174:refrigerant
1909:Categories
1635:Thermostat
1557:Humidistat
1488:Zone valve
1457:TurboSwing
1332:Oil heater
1302:Humidifier
1232:Gas heater
1182:Fan heater
1152:Evaporator
1137:Economizer
1112:Compressor
1017:Air filter
1000:Components
817:Forced-air
713:Antifreeze
686:Technology
632:Outgassing
572:Convection
502:2021-11-04
473:2024-02-28
448:2024-02-28
409:2024-02-28
351:Cryogenics
331:5 November
306:5 November
244:References
191:cryogenics
69:newspapers
1745:Industry
1594:OpenTherm
1272:Heat pump
1267:Heat pipe
1217:Fume hood
1192:Fireplace
1097:Condenser
1047:Attic fan
843:Hydronics
497:New Atlas
1852:See also
1577:LonWorks
1511:Aquastat
1377:Register
1357:Radiator
1012:Air door
812:Firestop
612:Humidity
587:Enthalpy
577:Dilution
562:Bake-out
550:concepts
326:Ohio.edu
204:See also
132:solenoid
1651:trades,
1222:Furnace
1087:Chiller
759:Coolant
359:Bibcode
198:Embraco
138:History
83:scholar
1804:SMACNA
1764:ASHRAE
1584:(MERV)
1538:(CADR)
1516:BACnet
1469:(ULPA)
1322:Louver
1247:Grille
1122:Damper
1072:Boiler
970:(VCRS)
771:(DOAS)
85:
78:
71:
64:
56:
1844:(VOC)
1838:(SBS)
1827:(IAQ)
1784:CIBSE
1779:BSRIA
1682:(BIM)
1626:(STP)
1590:(NTP)
1212:Freon
982:(VRF)
976:(VAV)
834:(HRV)
808:(ERV)
782:(DCV)
755:(CAV)
262:(PDF)
176:in a
125:is a
90:JSTOR
76:books
1799:LEED
1759:AMCA
1754:AHRI
1287:HEPA
1207:Flue
1132:Duct
333:2017
308:2017
62:news
1809:UMC
1794:IIR
1774:BRE
1167:Fan
367:doi
274:doi
164:To
157:To
150:To
45:by
1911::
495:.
466:.
441:.
401:.
365:.
355:45
353:.
341:^
324:.
299:.
286:^
270:84
268:.
264:.
121:A
533:e
526:t
519:v
505:.
476:.
451:.
426:.
412:.
387:.
373:.
369::
361::
335:.
310:.
280:.
276::
112:)
106:(
101:)
97:(
87:·
80:·
73:·
66:·
39:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
