Back to results
US 9,810,465 B2Granted
Heat pump system for vehicle
AssigneeHanon Systems
InventorsSung Ho Kang, Hak Kyu Kim, Sang Ki Lee, Young Ho Choi, Jae Min Lee, Jung Jae Lee
Life of this patent
Estimating the term…
Abstract
A heat pump system for a vehicle delays the change of the direction of a directional valve for a given period of time and then conducts the change of the direction of the directional valve, upon receiving the mode change signal between an air conditioner mode and a heat pump mode, thus preventing the generation of the noise and vibration caused by the differential pressure of a refrigerant.
Claims17
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.
5 more elements
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.
7 more elements
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.
7 more elements
Dependencies are inferred from the claim text.