US 9,810,465 B2
Heat pump system for vehicle
Sung Ho Kang, Daejeon (KR); Hak Kyu Kim, Daejeon (KR); Sang Ki Lee, Daejeon (KR); Young Ho Choi, Daejeon (KR); Jae Min Lee, Daejeon (KR); and Jung Jae Lee, Daejeon (KR)
Assigned to HANON SYSTEMS, Daejeon (KR)
Filed by HALLA VISTEON CLIMATE CONTROL CORP., Daedeok-gu, Daejeon (KR)
Filed on Oct. 7, 2014, as Appl. No. 14/508,449.
Claims priority of application No. 10-2013-0119681 (KR), filed on Oct. 8, 2013; and application No. 10-2014-0125970 (KR), filed on Sep. 22, 2014.
Prior Publication US 2015/0096319 A1, Apr. 9, 2015
Int. Cl. F25B 49/02 (2006.01); F25B 41/04 (2006.01); F25B 30/02 (2006.01); F25B 5/00 (2006.01); F25B 6/04 (2006.01); F25B 41/06 (2006.01); F25B 40/00 (2006.01)
CPC F25B 49/02 (2013.01) [F25B 5/00 (2013.01); F25B 6/04 (2013.01); F25B 30/02 (2013.01); F25B 41/046 (2013.01); F25B 41/062 (2013.01); F25B 40/00 (2013.01); F25B 2341/0662 (2013.01); F25B 2400/0409 (2013.01); F25B 2600/2515 (2013.01); F25B 2600/2519 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A heat pump system for a vehicle comprising:
heat pump cycle components including a compressor, an indoor heat exchanger, an expansion valve unit, an outdoor heat exchanger and an evaporator;
a refrigerant circulation line R connecting said heat pump cycle components;
a bypass line and a second valve unit disposed on the refrigerant circulation line to allow a refrigerant circulating the refrigerant circulation line to bypass at least one component among the heat pump cycle components; and
a controller adapted to change the direction of the flow of refrigerant through the second valve unit in case a mode change signal to change between an air conditioner mode and a heat pump mode is received, characterized in that:
when the mode change signal is received, the controller changes the direction of the second valve unit after a first delay time from the mode change signal receiving time;
wherein the expansion valve unit comprises an on/off valve disposed on the refrigerant circulation line between the indoor heat exchanger and the outdoor heat exchanger to perform an opening/closing operation for the flow of the refrigerant and an orifice integrally formed with the on/off valve to expand the refrigerant, so that upon the air conditioner mode, the expansion valve unit opens the on/off valve to allow the refrigerant to flow therethrough in a state where the refrigerant is in an unexpanded state, and upon the heat pump mode, the expansion valve unit closes the on/off valve to allow the refrigerant to be expanded through the orifice and thus flow therethrough;
wherein upon receiving the mode change signal, the controller delays the opening/closing operation of the on/off valve for a second delay time and then conducts the opening/closing operation.
 
16. A heat pump system for a vehicle comprising:
heat pump cycle components including a compressor, an indoor heat exchanger, an expansion valve unit, an outdoor heat exchanger and an evaporator;
a refrigerant circulation line R connecting said heat pump cycle components;
a bypass line and a second valve unit disposed on the refrigerant circulation line to allow a refrigerant circulating the refrigerant circulation line to bypass at least one component among the heat pump cycle components; and
a controller adapted to change the direction of the flow of refrigerant through the second valve unit in case a mode change signal to change between an air conditioner mode and a heat pump mode is received, characterized in that:
when the mode change signal is received, the controller changes the direction of the second valve unit after a first delay time from the mode change signal receiving time;
wherein the expansion valve unit comprises an on/off valve disposed on the refrigerant circulation line between the indoor heat exchanger and the outdoor heat exchanger to perform an opening/closing operation for the flow of the refrigerant and an orifice integrally formed with the on/off valve to expand the refrigerant, so that upon the air conditioner mode, the expansion valve unit opens the on/off valve to allow the refrigerant to flow therethrough in a state where the refrigerant is in an unexpanded state, and upon the heat pump mode, the expansion valve unit closes the on/off valve to allow the refrigerant to be expanded through the orifice and thus flow therethrough;
wherein the on/off valve is adapted to open and close a refrigerant passage formed at the inside thereof and has a valve member on which the orifice is formed and a solenoid mounted on one side thereof to operate the valve member; and
wherein upon receiving the mode change signal, the controller delays the opening/closing operation of the on/off valve for a second delay time and then conducts the opening/closing operation.
 
17. A heat pump system for a vehicle comprising:
heat pump cycle components including a compressor, an indoor heat exchanger, an expansion valve unit, an outdoor heat exchanger and an evaporator;
a refrigerant circulation line R connecting said heat pump cycle components;
a bypass line and a second valve unit disposed on the refrigerant circulation line to allow a refrigerant circulating the refrigerant circulation line to bypass at least one component among the heat pump cycle components; and
a controller adapted to change the direction of the flow of refrigerant through the second valve unit in case a mode change signal to change between an air conditioner mode and a heat pump mode is received, characterized in that:
when the mode change signal is received, the controller changes the direction of the second valve unit after a first delay time from the mode change signal receiving time;
wherein the expansion valve unit comprises an on/off valve disposed on the refrigerant circulation line between the indoor heat exchanger and the outdoor heat exchanger to perform an opening/closing operation for the flow of the refrigerant and an orifice integrally formed with the on/off valve to expand the refrigerant, so that upon the air conditioner mode, the expansion valve unit opens the on/off valve to allow the refrigerant to flow therethrough in a state where the refrigerant is in an unexpanded state, and upon the heat pump mode, the expansion valve unit closes the on/off valve to allow the refrigerant to be expanded through the orifice and thus flow therethrough;
wherein the on/off valve is adapted to open and close a refrigerant passage formed at the inside thereof and has a valve member on which the orifice is formed and a motor mounted on one side thereof to rotate the valve member; and
wherein upon receiving the mode change signal, the controller delays the opening/closing operation of the on/off valve for a second delay time and then conducts the opening/closing operation.