Air conditioning system with low compression load

An air conditioning system, comprising an expansion unit used for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor used for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulating the refrigerant through the compressor, outdoor unit, expansion unit, and indoor unit to heat or cool a target area using a phase change of the refrigerant, wherein condensed refrigerant from the indoor unit or the outdoor unit passes through a heat exchanging, sub-evaporating unit prior to flowing into the expansion unit, with the refrigerant from said sub-evaporating unit partially flowing into a sub-expansion unit to be adiabatically expanded to become low temperature, low pressure bypassed refrigerant, and both the bypassed refrigerant flowing from the sub-expansion unit and the refrigerant flowing from the outdoor unit or the indoor unit commonly passing through the sub-evaporating unit prior to flowing into the compressor, wherein the heat exchanging, sub-evaporating unit includes a first heat exchanging, sub-evaporating unit (250) having a heat exchanger (252) mounted in a housing (251) and a second heat exchanging, sub-evaporating unit (260) having a heat exchanger (262) mounted in a housing (261), the expansion unit (210) has a first opening in fluid communication to first opening of the heat exchanger (252) of the first heat exchanging, sub-evaporating unit (250) and has a second opening in fluid communication with first opening of the heat exchanger (262) of the second heat exchanging, sub-evaporating unit (260);

• a first opening of a first sub-expansion unit (271) in fluid communication with a first opening of a first fluid control valve (255a), with second opening of the first fluid control valve (255a) in fluid communication with the first opening of the expansion unit (210) and the first opening of the heat exchanger (252) of the first heat exchanging, sub-evaporating unit (250) with second opening of the first sub-expansion unit (271) in fluid communication with the housing (251) of the first heat exchanging, sub-evaporating unit (250);
• first opening of second sub-expansion unit (272) in fluid communication with first opening of a second flow control valve (265a) with second opening of the second flow control valve (265a) in fluid communication with the second opening of the expansion unit (210) and the first opening of the heat exchanger (262) of the second heat exchanging, sub-evaporating unit (260) with second opening of the sub-expansion unit (272) in fluid communication with the housing (261) of the second heat exchanging, sub-evaporating unit (260);
• second opening of the heat exchanger (252) of the first heat exchanging, sub-evaporating unit (250) in fluid communication with the outdoor unit (240);
• second opening of the heat exchanger (262) of the second heat exchanging, sub-evaporating unit (260) in fluid communication with the indoor unit (220);
• the housing (251) of the first heat exchanging, sub-evaporating unit (250) in fluid communication with first opening of a third flow control valve (256a) and with first opening of a fourth fluid control valve (257a);
• the housing (261) of the second heat exchanging, sub-evaporating unit (260) in fluid communication with first opening of a fifth flow control valve (266a) and with first opening of a sixth flow control valve (267a), second opening of the fourth and sixth valves (257a and 267a) in fluid communication with first opening of the compressor (230);
• and
• second opening of the fifth control valve (266a) in fluid communication with first opening of seventh flow control value (295a) and the outdoor unit (240), second opening of the seventh control valve (295a) in fluid communication with second opening of the compressor (230) and first opening of eighth flow control valve (296a), second opening of the eighth flow control valve (296a) in fluid communication with the indoor unit (220) and second opening of third control valve (256a),
• wherein when the system is in the cooling mode the first valve (255a), the third valve (256a), the fourth valve (257a), and the seventh valve (295a) are in an open position to pass refrigerant therethrough and the second valve (265a), the fifth valve (266a), the sixth valve (267a), and the eighth valve (296a) are in the closed position to stop refrigerant from moving therethrough and when the system is in the heating mode the second valve (265a), the fifth valve (266a), the sixth valve (267a), and the eighth valve (296a) are in the open position to pass refrigerant and the first valve (255a), the third valve (256a), the fourth valve (257a), and the seventh valve (296a) are in the closed position to stop refrigerant from moving therethrough.

An air conditioning system, comprising an expansion unit used for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor used for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulating the refrigerant through the compressor, outdoor unit, expansion unit, and indoor unit to heat or cool a target area using a phase change of the refrigerant, wherein condensed refrigerant from the indoor unit or the outdoor unit passes through a heat exchanging, sub-evaporating unit prior to flowing into the expansion unit, with the refrigerant from the sub-evaporating unit partially flowing into a sub-expansion unit to be adiabatically expanded to become low temperature, low pressure bypassed refrigerant, and both the bypassed refrigerant flowing from the sub-expansion unit and passing through the sub-evaporating unit and the refrigerant flowing from the outdoor unit or the indoor unit and passing through the expansion unit commonly flowing into the compressor, wherein the heat exchanging, sub-evaporating unit includes a first heat exchanging, sub-evaporating unit (350) having a heat exchanger (352) mounted in a housing (351) and a second heat exchanging, sub-evaporating unit (360) having a heat exchanger (362) mounted in a housing (361), the expansion unit (310) has a first opening in fluid communication to first opening of the heat exchanger (352) of the first heat exchanging, sub-evaporating unit (350) and has a second opening in fluid communication with first opening of the heat exchanger (362) of the second heat exchanging, sub-evaporating unit (360);

• first opening of a first sub-expansion unit (371) in fluid communication with a first opening of a first flow control valve (355a), with second opening of the first flow control valve (355a) in fluid communication with the first opening of the expansion unit (310) and the first opening of the heat exchanger (352) of the first heat exchanging, sub-evaporating unit (350) with second opening of the first sub-expansion unit (371) in fluid communication with the housing (351) of the first heat exchanging, sub-evaporating unit (350);
• first opening of a second sub-expansion unit (372) in fluid communication with first opening of a second flow control valve (365a) with second opening of the second flow control valve (365a) in fluid communication with the second opening of the expansion unit (310) and the first opening of the heat exchanger (362) of the second heat exchanging, sub-evaporating unit (360) with second opening of the sub-expansion unit (372) in fluid communication with the housing (361) of the second heat exchanging, sub-evaporating unit (360);
• second opening of the heat exchanger (352) of the first heat exchanging, sub-evaporating unit (350) is in fluid communication with the outdoor unit (340), second opening of the heat exchanger (362) of the second heat exchanging, sub-evaporating unit (360) is in fluid communication with the indoor unit (320);
• the housing (351) of the first heat exchanging, sub-evaporating unit (350) is in fluid communication with first opening of a third flow control valve (398a) and first opening of a fourth flow control valve (92a), with the second opening of the third valve (398a) in fluid communication with the housing of the expansion unit (310) and first opening of a fifth flow control valve (396a), with second opening of the fifth control valve (396a) in fluid communication with the outdoor unit (340) and first opening of sixth flow control valve (395a);
• second opening of the sixth control valve (395a) in fluid communication with first opening of the compressor (330) and first opening of seventh flow control valve (397a), with second opening of the seventh control valve (397a) in fluid communication with the indoor unit (320) and first opening of the eighth flow control valve (399a);
• second opening of the eighth control valve (399a) in fluid communication with the housing of the expansion unit (310) and first opening of ninth flow control valve (393b);
• second opening of the ninth control valve (393b) in fluid communication with the housing (361) of the second heat exchanging, sub-evaporating unit (360) and first opening of tenth flow control valve (393a);
• and
• second opening of the tenth control valve (393a) in fluid communication with the second opening of the compressor (330) and the second opening of the fourth control valve (392a),
• wherein when the system is in the cooling mode the first valve (355a), the third valve (398a), the fourth valve (392a), the sixth valve (395a), and the eighth valve (399a) are in an open position to pass refrigerant therethrough and the second valve (365a), the fifth valve (396a), the seventh valve (397a), the ninth valve (393b), and the tenth valve (393a) are in the closed position to stop refrigerant from moving therethrough and when the system is in the heating mode the second valve (365a), the fifth valve (396a), the seventh valve (397a), the ninth valve (393b), and the tenth valve (393a) are in the open position to pass refrigerant and the first valve (355a), the third valve (398a), the fourth valve (392a), the sixth valve (395a), and the eighth valve (399a) are in the closed position to stop refrigerant from moving therethrough.

An air conditioning system, comprising an expansion unit used for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor used for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulating the refrigerant through the compressor, outdoor unit, expansion unit, and indoor unit to heat or cool a target area using a phase change of the refrigerant, wherein condensed refrigerant from the indoor unit or the outdoor unit passes through a heat exchanging, sub-evaporating unit prior to flowing into the expansion unit, with the refrigerant from the sub-evaporating unit partially flowing into a sub-expansion unit to be adiabatically expanded to become low temperature, low pressure bypassed refrigerant, and both the bypassed refrigerant flowing from the sub-expansion unit and the refrigerant flowing from the outdoor unit or the indoor unit and passing through the expansion unit commonly passing through the sub-evaporating unit prior to flowing into the compressor, wherein the heat exchanging, sub-evaporating unit includes a first heat exchanging, sub-evaporating unit (450) having a heat exchanger (452) mounted in a housing (451) and a second heat exchanging, sub-evaporating unit (460) having a heat exchanger (462) mounted in a housing (461), the expansion unit (410) has a first opening in fluid communication with first opening of the heat exchanger (452) of the first heat exchanging, sub-evaporating unit (450) and has a second opening in fluid communication with first opening of the heat exchanger (462) of the second heat exchanging, sub-evaporating unit (460);

• a first sub-expansion unit (471) having a first opening in fluid communication with first opening of a first control valve (455a), with second opening of the first flow control valve (455a) in fluid communication with the first opening of the expansion unit (410) and the first opening of the heat exchanger (452) of the first sub-evaporation unit (450), second opening of the first sub-expansion unit (471) is in fluid communication with the housing (451) of the first sub-evaporation unit (450);
• a second sub-expansion unit (472) having a first opening in fluid communication with first opening of a second flow control valve (465a), with second opening of the second flow control valve (465a) in fluid communication with the second opening of the expansion unit (410) and the first opening of the heat exchanger (462) of the second heat exchanging, sub-evaporating unit (460), with second opening of the second sub-expansion unit (472) in fluid communication with the housing (461) of the second heat exchanging, sub-evaporating unit (460);
• second opening of the heat exchanger (452) of the first heat exchanging, sub-evaporating unit (450) in fluid communication with the outdoor unit (440);
• second opening of the heat exchanger (462) of the second heat exchanging, sub-evaporating unit (460) is in fluid communication with the indoor unit (420);
• the housing (451) of the first heat exchanging, sub-evaporating unit (450) in fluid communication with first opening of a third flow control valve (457a) and in fluid communication with first opening of a fourth flow control valve (456a), second opening of the third valve (457a) in fluid communication with first opening of the compressor (430) and first opening of fifth flow control valve (467a), with second opening of the fifth control valve in fluid communication with the housing (461) of the second heat exchanging, sub-evaporating unit (460);
• the housing of the expansion unit (410) at a first location is in fluid communication with second opening of the fourth control valve (456a) and first opening of sixth flow control valve (492a) and at a second location in fluid communication with first opening of a seventh flow control valve (466a) and first opening of eighth flow control valve (493a), with second opening of the seventh control valve (466a) in fluid communication with the housing (461) of the second heat exchanging, sub-evaporating unit (460);
• second opening of the eighth control valve (493a) in fluid communication with the indoor unit (420) and first opening of ninth flow control valve 496a);
• and
• second opening of the ninth control valve (496a) in fluid communication with the compressor (430) and first opening of tenth flow control valve (495a), with second opening of the tenth control valve (494a) in fluid communication with the outdoor unit (440) and second opening of the sixth control valve (492a),
• wherein when the system is in the cooling mode the first valve (455a), the third valve (457a), the fourth valve (456a), the eighth valve (493a), and the tenth valve (495a) are in an open position to pass refrigerant therethrough and the second valve (465a), the fifth valve (467a), the sixth valve (492a), the seventh valve (466a), and the ninth valve (496a) are in the closed position to stop refrigerant from moving therethrough, and when the system is in the heating mode the second valve (465a), the fifth valve (467a), the sixth valve (492a), the seventh valve (466a), and the ninth valve (496a) are in the open position to pass refrigerant therethrough, and the first valve (455a), the third valve (457a), the fourth valve (456a), the eighth valve (493a), and the ten valve (495a) are in the closed position to stop refrigerant from moving therethrough.