KR102495460B1 - Cooling and heating system for electrical vehicle - Google Patents

Abstract

The cooling and heating system for an electric vehicle according to the present invention performs different operation modes by controlling the operation of the cooling water heat dissipation flow path opening and closing means and the refrigerant condensation flow path opening and closing means according to the amount of waste heat of electric components, the heating load of the vehicle compartment, and the temperature of the outside air. Energy efficiency can be maximized. In addition, heat exchange between the refrigerant and the cooling water is performed in the first and second internal heat exchangers not only during the heating operation but also during the cooling operation, thereby enhancing thermal linkage between the refrigerant cycle and the cooling water cycle, thereby improving efficiency. In addition, when the heating operation is in operation and the amount of waste heat of electrical components is sufficient, but the use of an external heat exchanger is impossible, the condensation heat of the refrigerant is reduced by dividing the cooling water cycle into two separate first and second cooling water cycles. 2 It is secured from the first cooling water cycle through the internal heat exchanger, and the evaporation heat of the refrigerant can be secured from the second cooling water cycle through the first internal heat exchanger.

Description

Cooling and heating system for electrical vehicle}

The present invention relates to a cooling and heating system for an electric vehicle, and more particularly, can improve energy use efficiency by controlling the flow of refrigerant and cooling water differently according to the amount of waste heat of electrical components, whether or not an external heat exchanger is installed, and the required load. It relates to a heating and cooling system for an electric vehicle.

In general, a cooling and heating system of an internal combustion engine vehicle includes a cooling system for cooling a vehicle cabin and a heating system for heating the vehicle cabin.

A conventional cooling system is configured to cool the interior air by using a refrigerant circulating in a refrigerant cycle and supplying the cooled air to the interior compartment. The heating system heats outside air using heat of cooling water of a cooling water cycle for cooling an engine, and supplies the heated warmth to a vehicle interior to heat the vehicle interior.

However, an electric vehicle driven by an electric motor has a problem in that it is difficult to secure a heating source compared to an internal combustion engine vehicle.

Recently, a technology for reducing power consumption of a compressor by transferring waste heat from a motor to a refrigerant by introducing an internal heat exchanger for exchanging heat between cooling water and a refrigerant in a heating and cooling system of an electric vehicle has been developed. However, the conventional internal heat exchanger does not play any role during the cooling operation, and rather has a problem in that a pressure drop of the refrigerant occurs.

Korean Patent Registration No. 10-1342931

An object of the present invention is to provide a cooling and heating system for an electric vehicle capable of further improving energy use efficiency.

An electric vehicle cooling and heating system according to the present invention includes a compressor for compressing refrigerant, an external heat exchanger for heat exchange between the refrigerant and outside air, an evaporator for heat exchange of refrigerant with air flowing into the vehicle cabin during cooling operation of the vehicle cabin, and a heat pump including a condenser for exchanging heat between the refrigerant and the air flowing into the vehicle during heating operation; a heater core for heating the vehicle interior by exchanging heat with the air flowing into the vehicle compartment from the cooling water that cooled the electrical components; a low-temperature radiator for exchanging heat with the outside air to cool the electric component and dissipating the heat of the cooling water to the outside air; a first internal heat exchanger for evaporating the refrigerant by exchanging heat with the refrigerant before flowing into the compressor; a second internal heat exchanger for condensing the refrigerant by exchanging heat with the refrigerant discharged from the compressor; a first cooling water heat dissipation passage branched from the cooling water discharge passage of the electric component and connected to a suction side of the first internal heat exchanger; a second coolant heat dissipation passage branched off from the coolant discharge passage of the electric component and connected to a suction side of the heater core; a third coolant heat dissipation passage branched off from the coolant discharge passage of the electric component and connected to a suction side of the low-temperature radiator; a first refrigerant condensing passage branched from the discharge passage of the compressor and connected to a suction side of the condenser; a second refrigerant condensing passage branched off from the discharge passage of the compressor and connected to a suction side of the second internal heat exchanger; a cooling water radiating flow path opening and closing means for selectively opening and closing the first coolant radiating flow path, the second coolant radiating flow path, and the third coolant radiating flow path; a refrigerant condensation passage opening and closing means for selectively opening and closing the first refrigerant condensation passage and the second refrigerant condensation passage; and a control unit controlling operations of the cooling water heat dissipation flow path opening/closing means and the refrigerant condensation flow path opening/closing means according to at least one of a temperature of the cooling water discharged from the electric component, a heating load of the vehicle compartment, and the temperature of the outside air.

The means for opening and closing the cooling water heat dissipation flow path may include a first coolant three-way valve installed at a point where the first coolant heat dissipation flow path diverges from the coolant discharge flow path of the electric component; and a second coolant three-way valve installed at a point where the second coolant heat discharge passage and the third coolant heat discharge passage diverge from the coolant discharge passage of the electric component.

A first cooling water circulation passage connecting the discharge side of the heater core and the suction side of the second internal heat exchanger, and a second cooling water circulation passage connecting the discharge side of the second internal heat exchanger and the suction side of the electric component; A third cooling water circulation passage connecting the discharge side of the first internal heat exchanger and the first cooling water circulation passage, branched from the third cooling water circulation passage and connected to the suction side of the low-temperature radiator, the first internal heat exchanger A fourth cooling water circulation passage for guiding the cooling water from the cooling water to the low-temperature radiator, a first cooling water pump installed in the second cooling water circulation passage, a second cooling water pump installed in the fourth cooling water circulation passage, and the third cooling water circulation A third cooling water three-way valve is installed at a point where the fourth cooling water circulation path diverges from the flow path.

The refrigerant condensing passage opening and closing means is installed at a point where the first refrigerant condensing passage and the second refrigerant condensing passage diverge from the discharge passage of the compressor, and selectively switches the first refrigerant condensing passage and the second refrigerant condensing passage. It includes a first refrigerant three-way valve that opens and closes.

The heat pump is branched from an expansion valve for heating, which expands the refrigerant condensed and discharged from either the second internal heat exchanger or the condenser during the heating operation, and a refrigerant discharge path of the expansion valve for heating, to supply the first internal heat exchanger. A first refrigerant evaporation passage connected to the suction side of the heating, a second refrigerant evaporation passage branched from the refrigerant discharge passage of the heating expansion valve and connected to the external heat exchanger, and the first refrigerant evaporation passage and the second refrigerant evaporation passage selectively. A refrigerant evaporation path opening/closing unit may be further included, and the control unit controls operation of the refrigerant evaporation path opening/closing unit according to the temperature of the cooling water discharged from the electric component, the heating load of the vehicle compartment, and the temperature of the outside air.

The refrigerant evaporation passage opening and closing means includes a second refrigerant three-way valve installed at a point where the first refrigerant evaporation passage and the second refrigerant evaporation passage diverge from the refrigerant discharge passage of the heating expansion valve.

The heat pump includes an external heat exchanger refrigerant discharge passage connecting the external heat exchanger and the first internal heat exchanger, a first internal heat exchanger refrigerant discharge passage connecting the first internal heat exchanger and the compressor, and the external heat exchanger A first internal heat exchanger bypass passage branched off from the refrigerant discharge passage and connected to the refrigerant discharge passage of the first internal heat exchanger to bypass the first internal heat exchanger during the cooling operation, and the first internal heat exchanger refrigerant An evaporator suction passage branched from the discharge passage and connected to the evaporator to guide the refrigerant to the evaporator during the cooling operation, and an expansion valve for cooling installed in the evaporator suction passage to expand the refrigerant during the cooling operation. do.

The heat pump is branched from a flow path connecting the second internal heat exchanger and the expansion valve for heating and is formed to bypass the expansion valve for heating, and guides the refrigerant to bypass the expansion valve for heating during the cooling operation. It further includes an expansion valve bypass flow path and a cooling check valve installed in the expansion valve bypass flow path for heating to block the flow of refrigerant during the heating operation.

In the heating operation, the first operation in which the temperature of the cooling water discharged from the electric component is less than the preset cooling water temperature, the heating load of the vehicle compartment is equal to or greater than the preset heating load, and the temperature of the outside air is equal to or greater than the preset external temperature mode, the control unit controls the first coolant three-way valve to open the first coolant heat dissipation flow path and the second coolant three-way valve to block the second coolant heat dissipation flow path and the third coolant heat dissipation flow path. , the cooling water discharged from the electric component is introduced into the first internal heat exchanger.

In the heating operation, the second operation in which the temperature of the coolant discharged from the electric component is equal to or higher than the preset set coolant temperature, the heating load of the vehicle compartment is equal to or higher than the preset set heating load, and the temperature of the outside air is equal to or higher than the preset set external temperature mode, the control unit controls the first coolant three-way valve to block the first coolant heat dissipation flow path, and the second coolant three-way valve to open the second coolant heat dissipation flow path and to block the third coolant heat dissipation flow path. control so that the cooling water discharged from the electric component flows into the heater core.

A third operation in which the heating operation is performed, the temperature of the cooling water discharged from the electric component is equal to or higher than a preset set cooling water temperature, the heating load of the vehicle compartment is equal to or higher than the preset set heating load, and the temperature of the outside air is lower than the preset set external temperature mode, the control unit operates both the first coolant pump and the second coolant pump, the first coolant three-way valve blocks the first coolant heat dissipation passage, and the second coolant three-way valve operates the second coolant three-way valve. The cooling water heat dissipation flow path is opened and the third coolant heat dissipation flow path is shielded so that the cooling water discharged from the cooling water discharge flow path of the electric component is passed through the heater core and the second internal heat exchanger in turn and then circulated to the electrical component. 3 A three-way coolant valve opens the fourth coolant circulation passage, and the coolant that has passed through the first internal heat exchanger passes through the low-temperature radiator and is circulated to the first internal heat exchanger.

A fourth operation in which the heating operation is performed, the temperature of the cooling water discharged from the electric component is less than the preset cooling water temperature, the heating load of the vehicle compartment is greater than or equal to the preset heating load, and the temperature of the outside air is less than the preset external temperature. mode, the control unit controls the first coolant three-way valve to open the first coolant heat discharge passage and the second coolant three-way valve to block the second coolant heat discharge passage and the third coolant heat discharge passage; The first refrigerant three-way valve opens the first refrigerant condensation passage and controls the second refrigerant condensation passage to be shielded, the second refrigerant three-way valve opens the first refrigerant evaporation passage, and The second refrigerant evaporation path is controlled to be shielded so that the refrigerant discharged from the compressor passes through the condenser and the expansion valve for heating and then through the first internal heat exchanger.

In the heating operation, the temperature of the cooling water discharged from the electric component is less than the preset cooling water temperature, the heating load of the vehicle compartment is greater than or equal to the preset heating load, and the temperature of the outside air is less than the preset external temperature, In the fifth operation mode set to remove frost from the external heat exchanger, the control unit causes the first coolant three-way valve to block the first coolant heat discharge flow path, and the second coolant three-way valve to block the second coolant heat discharge flow path. control to open the third coolant heat dissipation passage and block the first refrigerant three-way valve, block the first refrigerant condensation passage and open the second refrigerant condensation passage, and control the second refrigerant three-way valve A valve is controlled to block the first refrigerant evaporation passage and open the second refrigerant evaporation passage, to close the expansion valve for heating, and to open the check valve for cooling, so that the refrigerant discharged from the compressor After passing through the first internal heat exchanger, it is introduced into the external heat exchanger.

A sixth operation in which the heating operation is performed, the temperature of the cooling water discharged from the electric component is equal to or higher than the set cooling water temperature, the heating load of the vehicle compartment is less than the preset heating load, and the temperature of the outside air is equal to or higher than the preset set outdoor temperature. mode, the control unit controls the first coolant three-way valve to open the first coolant heat discharge passage and the second coolant three-way valve to block the second coolant heat discharge passage and the third coolant heat discharge passage; The first refrigerant three-way valve opens the first refrigerant condensation passage and controls the second refrigerant condensation passage to be shielded, the second refrigerant three-way valve closes the first refrigerant evaporation passage, and 2 The refrigerant evaporation path is controlled to open.

A seventh operation in which the heating operation is performed, the temperature of the cooling water discharged from the electric component is greater than or equal to the preset cooling water temperature, the heating load of the vehicle compartment is less than the preset heating load, and the temperature of the outside air is less than the preset external temperature. mode, the control unit causes the first coolant three-way valve to block the first coolant heat dissipation flow path, and the second coolant three-way valve to block the second coolant heat dissipation flow path and open the third coolant heat dissipation flow path. control so that the cooling water discharged from the electric component flows into the low-temperature radiator.

A cooling and heating system for an electric vehicle according to another aspect of the present invention includes a compressor for compressing a refrigerant, an external heat exchanger for exchanging heat between the refrigerant and outside air, an evaporator for exchanging heat between the refrigerant and air flowing into the vehicle during cooling operation of the vehicle, a heat pump including a condenser for exchanging heat between the refrigerant and the air flowing into the cabin during the heating operation of the cabin; a heater core for heating the vehicle interior by exchanging heat with the air flowing into the vehicle compartment from the cooling water that cooled the electrical components; a low-temperature radiator for exchanging heat with the outside air to cool the electric component and dissipating the heat of the cooling water to the outside air; a first internal heat exchanger for evaporating the refrigerant by exchanging heat with the refrigerant before flowing into the compressor; a second internal heat exchanger for condensing the refrigerant by exchanging heat with the refrigerant discharged from the compressor; a first cooling water heat dissipation passage branched from the cooling water discharge passage of the electric component and connected to a suction side of the first internal heat exchanger; a second coolant heat dissipation passage branched off from the coolant discharge passage of the electric component and connected to a suction side of the heater core; a third coolant heat dissipation passage branched off from the coolant discharge passage of the electric component and connected to a suction side of the low-temperature radiator; a first refrigerant condensing passage branched from the discharge passage of the compressor and connected to a suction side of the condenser; a second refrigerant condensing passage branched off from the discharge passage of the compressor and connected to a suction side of the second internal heat exchanger; a cooling water radiating flow path opening and closing means for selectively opening and closing the first coolant radiating flow path, the second coolant radiating flow path, and the third coolant radiating flow path; a refrigerant condensation passage opening and closing means for selectively opening and closing the first refrigerant condensation passage and the second refrigerant condensation passage; and a control unit controlling operations of the cooling water heat dissipation flow passage opening and closing means and the refrigerant condensation flow passage opening and closing means according to at least one of a temperature of the coolant discharged from the electrical component, a heating load of the vehicle compartment, and the temperature of the outside air, wherein the coolant dissipates heat. The passage opening/closing means may include a first coolant three-way valve installed at a point where the first coolant heat dissipation passage diverges from the coolant discharge passage of the electric component; and a second coolant three-way valve installed at a point where the second coolant heat discharge passage and the third coolant heat discharge passage diverge from the coolant discharge passage of the electric component, and the refrigerant condensation passage opening and closing means is provided in the discharge passage of the compressor. A first refrigerant three-way valve installed at a branching point between the first refrigerant condensation passage and the second refrigerant condensation passage and selectively opening and closing the first refrigerant condensation passage and the second refrigerant condensation passage, The pump is connected to an expansion valve for heating that expands the refrigerant condensed and discharged from one of the second internal heat exchanger and the condenser during the heating operation, and is branched from the refrigerant discharge path of the expansion valve for heating to suck the first internal heat exchanger. A first refrigerant evaporation passage connected to the side, a second refrigerant evaporation passage branched from the refrigerant discharge passage of the heating expansion valve and connected to the external heat exchanger, and selectively opening and closing the first refrigerant evaporation passage and the second refrigerant evaporation passage Further comprising a refrigerant evaporation passage opening and closing means, wherein the refrigerant evaporation passage opening and closing means is installed at a point where the first refrigerant evaporation passage and the second refrigerant evaporation passage diverge from the refrigerant discharge passage of the expansion valve for heating. contains the valve

A seventh operation in which the heating operation is performed, the temperature of the cooling water discharged from the electric component is greater than or equal to the preset cooling water temperature, the heating load of the vehicle compartment is less than the preset heating load, and the temperature of the outside air is less than the preset external temperature. mode, the control unit causes the first coolant three-way valve to block the first coolant heat dissipation flow path, and the second coolant three-way valve to block the second coolant heat dissipation flow path and open the third coolant heat dissipation flow path. control so that the coolant from the electric component flows into the low-temperature radiator, the first refrigerant three-way valve opens the first refrigerant condensation passage, and controls the second refrigerant condensation passage to be shielded; A two-refrigerant three-way valve is controlled to open the first refrigerant evaporation passage and to close the second refrigerant evaporation passage.

In the cooling operation, the control unit causes the first coolant three-way valve to block the first coolant heat dissipation flow path, the second coolant three-way valve to block the second coolant heat dissipation flow path, and the third coolant heat dissipation flow path to controlled to open, so that the coolant from the electric component flows into the low-temperature radiator, and the first refrigerant three-way valve blocks the first refrigerant condensation passage and controls the second refrigerant condensation passage to open The second refrigerant three-way valve opens the first refrigerant evaporation path and closes the second refrigerant evaporation path so that the refrigerant from the compressor flows into the second internal heat exchanger.

The cooling and heating system for an electric vehicle according to the present invention performs different operation modes by controlling the operation of the cooling water heat dissipation flow path opening and closing means and the refrigerant condensation flow path opening and closing means according to the amount of waste heat of electric components, the heating load of the vehicle compartment, and the temperature of the outside air. Energy efficiency can be maximized.

In addition, by directly supplying cooling water that has absorbed waste heat from electrical components during heating operation to the heater core, the waste heat from electrical components can be directly used for heating, so heating efficiency can be further improved.

In addition, heat exchange between the refrigerant and the cooling water is performed in the first and second internal heat exchangers not only during the heating operation but also during the cooling operation, thereby enhancing thermal linkage between the refrigerant cycle and the cooling water cycle, thereby improving efficiency.

In addition, when the heating operation is in operation and the amount of waste heat of electrical components is sufficient, but the use of an external heat exchanger is impossible, the condensation heat of the refrigerant is reduced by dividing the cooling water cycle into two separate first and second cooling water cycles. 2 It is secured from the first cooling water cycle through the internal heat exchanger, and the evaporation heat of the refrigerant can be secured from the second cooling water cycle through the first internal heat exchanger.

1 is a diagram schematically showing the configuration of a cooling and heating system for an electric vehicle according to an embodiment of the present invention.
2 is a diagram showing a first operation mode of a cooling and heating system for an electric vehicle according to an embodiment of the present invention.
3 is a diagram showing a second operation mode of a cooling and heating system for an electric vehicle according to an embodiment of the present invention.
4 is a diagram showing a third operation mode of a cooling and heating system for an electric vehicle according to an embodiment of the present invention.
5 is a diagram illustrating a fourth operation mode of a cooling and heating system for an electric vehicle according to an embodiment of the present invention.
6 is a diagram illustrating a fifth operation mode of the cooling and heating system for an electric vehicle according to an embodiment of the present invention.
7 is a diagram showing a sixth operation mode of a cooling and heating system for an electric vehicle according to an embodiment of the present invention.
8 is a diagram showing a seventh operation mode of the cooling and heating system for an electric vehicle according to an embodiment of the present invention.
9 is a diagram illustrating an eighth operation mode of a cooling and heating system for an electric vehicle according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a diagram schematically showing the configuration of a cooling and heating system for an electric vehicle according to an embodiment of the present invention.

Referring to FIG. 1 , a cooling and heating system for an electric vehicle according to an embodiment of the present invention includes a heat pump through which refrigerant circulates, a cooling water module through which coolant circulates, and a first internal heat exchanger 310 through which heat is exchanged between refrigerant and coolant. 2 includes an internal heat exchanger 320 and a controller (not shown).

The heat pump includes a compressor 101, an outdoor heat exchanger (ODHX) 102, an evaporator 103, a condenser 104, an expansion valve 140 for heating, an expansion valve 150 for cooling, and a refrigerant. It includes a flow path, a refrigerant condensed oil passage opening and closing means, and a refrigerant evaporation oil passage opening and closing means.

The compressor 101 compresses the refrigerant circulating through the heat pump.

The external heat exchanger 102 exchanges heat between the refrigerant circulating in the heat pump and the outside air.

The evaporator 103 is installed inside the air conditioning compartment 10 for supplying air-conditioned air to the passenger compartment, and heat exchanges between the cold air in the passenger compartment and the refrigerant during the cooling operation of the passenger compartment.

The condenser 104 condenses the refrigerant by exchanging heat between the air introduced into the cabin and the refrigerant during the heating operation of the cabin.

The expansion valve 140 for heating expands the refrigerant discharged from the internal heat exchanger 300 during a vehicle heating operation.

An air flip 12 is rotatably installed inside the air conditioning compartment 10 to switch the flow path of air supplied to the cabin according to the cooling operation and the heating operation.

The air flip 12 is operated under the control of the control unit, opens the flow path passing through the heater core 220 during heating operation, and closes the flow path passing through the heater core 220 during cooling operation so that the evaporator Air passing through (103) is introduced into the vehicle compartment.

The refrigerant passage includes a suction passage 101a of the compressor 101, a discharge passage 101b of the compressor 101, a first refrigerant condensation passage 111, a second refrigerant condensation passage 112, and a second inner A heat exchanger discharge passage 320b, a second internal heat exchanger bypass passage 132, a refrigerant discharge passage 140b of an expansion valve for heating, an expansion valve bypass passage 133 for heating, a first refrigerant evaporation passage 121, The second refrigerant evaporation passage 122, the external heat exchanger refrigerant discharge passage 102b, the first internal heat exchanger discharge passage 310b, the first internal heat exchanger bypass passage 131, the evaporator suction passage 103a and the evaporator It includes a discharge passage (103b).

An accumulator 106 is installed in the suction passage 101a of the compressor 101 .

The discharge passage 101b of the compressor 101 is branched into the first refrigerant condensation passage 111 and the second refrigerant condensation passage 112 .

The first refrigerant condensing passage 111 is a passage for guiding the refrigerant discharged from the compressor 101 to the condenser 104 . That is, the first refrigerant condensing passage 111 is a suction passage of the condenser 104 .

The second refrigerant condensation passage 112 is a passage for guiding the refrigerant discharged from the compressor 101 to the second internal heat exchanger 320 . That is, the second refrigerant condensing passage 112 is a suction passage of the second internal heat exchanger 320 .

In this embodiment, the first refrigerant condensing passage 111 and the second refrigerant condensing passage 112 are described as being branched from the discharge passage 101b of the compressor 101 as an example, but are not limited thereto. Any channel capable of guiding the refrigerant from the compressor 101 to the condenser 104 and the second internal heat exchanger 320 may be used.

The first refrigerant condensing passage 111 and the second refrigerant condensing passage 112 are selectively used according to an operation mode described later.

The refrigerant condensing channel opening/closing means selectively opens and closes the first refrigerant condensing channel 111 and the second refrigerant condensing channel 112 according to the operation mode.

The refrigerant condensing passage opening/closing means is installed at a point where the first refrigerant condensing passage 111 and the second refrigerant condensing passage 112 diverge in the discharge passage 101b of the compressor 101, The first refrigerant three-way valve 410 selectively opens and closes the refrigerant condensation passage 111 and the second refrigerant condensation passage 112.

However, it is not limited thereto, and the means for opening and closing the refrigerant condensing passage may be valves installed in the first refrigerant condensing passage 111 and the second refrigerant condensing passage 112, respectively.

The second internal heat exchanger suction passage 320a is connected to the second refrigerant condensation passage 112 and the discharge passage 104b of the condenser 104 . A second internal heat exchanger suction valve 161 is installed in the second internal heat exchanger suction passage 320a.

The second internal heat exchanger discharge passage 320b is a passage connecting the discharge port of the second internal heat exchanger 320 and the expansion valve 140 for heating.

The second internal heat exchanger bypass passage 132 connects the suction side and the discharge side of the second internal heat exchanger 320 to guide the refrigerant to bypass the second internal heat exchanger 320. am.

The expansion valve bypass passage 133 for heating connects the suction side and the discharge side of the expansion valve 140 for heating and guides the refrigerant to bypass the expansion valve 140 for heating during the cooling operation.

A check valve 162 for cooling is installed in the bypass flow path 133 of the expansion valve for heating to block the flow of refrigerant during the heating operation.

The cooling check valve 162 is opened during the cooling operation and blocks the reverse flow of the refrigerant during the heating operation.

The refrigerant discharge passage 140b of the expansion valve 140 for heating is branched into the first refrigerant evaporation passage 121 and the second refrigerant evaporation passage 122 .

The first refrigerant evaporation passage 121 is a passage for guiding the refrigerant discharged from the expansion valve 140 for heating to the first internal heat exchanger 310 .

The second refrigerant evaporation passage 122 is a passage for guiding the refrigerant discharged from the expansion valve 140 for heating to the external heat exchanger 102 .

The first refrigerant evaporation passage 121 and the second refrigerant evaporation passage 122 are selectively used according to an operation mode described later.

The refrigerant evaporation passage opening and closing means selectively opens and closes the first refrigerant evaporation passage 121 and the second refrigerant evaporation passage 122 according to the operation mode.

The refrigerant evaporation path opening/closing means includes a second refrigerant evaporation path 121 and the second refrigerant evaporation path 122 installed at a point where the refrigerant discharge path 140b of the heating expansion valve 140 diverges. The refrigerant three-way valve 420.

However, it is not limited thereto, and the refrigerant evaporation passage opening and closing means may be valves respectively installed in the first refrigerant evaporation passage 121 and the second refrigerant evaporation passage 122 .

The external heat exchanger refrigerant discharge passage 102b is a passage connecting the outlet of the external heat exchanger 102 and the first internal heat exchanger 310 .

The first internal heat exchanger discharge passage 310b is a passage connecting the discharge port of the first internal heat exchanger 310 and the suction side of the compressor 101 .

The first internal heat exchanger bypass flow path 131 connects the suction side and the discharge side of the first internal heat exchanger 310 so that the refrigerant bypasses the first internal heat exchanger 310 during the cooling operation. It is a flow path formed to

A first internal heat exchanger bypass valve 170 that opens and closes the first internal heat exchanger bypass channel 131 is installed in the first internal heat exchanger bypass channel 131 .

The evaporator suction passage 103a is a passage branched from the first internal heat exchanger refrigerant discharge passage 310b and connected to the suction side of the evaporator 103 .

The cooling expansion valve 150 is installed in the evaporator suction passage 103a.

The cooling expansion valve 150 expands the refrigerant discharged from the external heat exchanger 102 during the cooling operation.

The evaporator discharge passage 103b is a passage connecting the discharge port of the evaporator 103 and the suction side of the compressor 101 .

A third refrigerant three-way valve 430 may be installed at a point where the evaporator suction passage 103a diverges from the first internal heat exchanger refrigerant discharge passage 310b.

The third refrigerant three-way valve 430 regulates opening and closing of the evaporator suction passage 103a during the cooling operation.

Meanwhile, the cooling water module includes an electric component 210, a heater core 220, a low-temperature radiator 230, and a cooling water passage.

The power electronics and electric machinery (PEEM) 210 may include not only an electric motor but also a battery or various power control devices.

The heater core 220 is installed inside the air conditioning compartment 10 to heat the interior by exchanging heat between the cooling water cooling the electric component 210 and the air introduced into the interior. That is, the heater core 220 is a water-air indoor heat exchanger that exchanges heat between cooling water and air.

A PTC heater 222 for additionally supplying a heat source to the heater core 220 is installed inside the air conditioning room 10 .

The low temperature radiator (LTR) 230 is a radiator that radiates heat of the cooling water to the outside air by exchanging heat with the cooling water that cooled the electric component 210 and the outside air.

The cooling water passage includes a cooling water discharge passage 211 of the electrical component 210, a cooling water intake passage 212 of the electrical component 210, a cooling water heat radiation passage 250, a cooling water heat radiation passage opening and closing means, a cooling water circulation passage ( 260) and a means for opening and closing the cooling water circulation passage.

The cooling water heat dissipation passage 250 is a passage for dissipating heat of the cooling water discharged after cooling the electric component 210 . The cooling water heat dissipation passage includes three first, second, and third coolant heat dissipation passages 251, 252, and 253. In the present embodiment, the first, second, and third cooling water heat dissipation passages 251, 252, and 253 are explained as being formed by branching from the cooling water discharge passage 211 of the electric component 210 as an example. It is not limited, and it is of course also possible to connect each separately.

The first cooling water heat dissipation passage 251 is a passage branched from the cooling water discharge passage 211 of the electric component 210 and connected to the first internal heat exchanger 310 . The first coolant heat dissipation passage 251 is a passage used to dissipate heat of the cooling water discharged after cooling the electric component 210 through the first internal heat exchanger 310 .

The second cooling water heat dissipation passage 252 is a passage branched from the cooling water discharge passage 211 of the electric component 210 and connected to the heater core 220 . The second coolant heat dissipation passage 252 is a passage used to dissipate heat of the coolant discharged after cooling the electric component 210 through the heater core 220 .

The third coolant heat dissipation passage 253 is a passage branched from the coolant discharge passage 211 of the electric component 210 and connected to the low temperature radiator 230 . The third coolant heat dissipation passage 253 is a passage used to dissipate heat of the coolant discharged after cooling the electric component 210 through the low temperature radiator 230 .

In the cooling water discharge passage 211 of the electric component 210, the second and third cooling water heat dissipation passages 252 branch from the downstream side of the first coolant heat dissipation passage 251.

The means for opening and closing the cooling water radiating passage selectively opens and closes the first coolant radiating passage 251 , the second cooling water radiating passage 252 and the third cooling water radiating passage 253 .

The means for opening and closing the cooling water heat dissipation flow path includes two first and second cooling water three-way valves 510 and 520.

The first coolant three-way valve 510 is a valve installed at a point where the first coolant radiation passage 251 diverges from the coolant discharge passage 211 of the electric component 210 . The first coolant three-way valve 510 selectively opens and closes the first coolant heat radiation passage 251 according to the operation mode.

The second coolant three-way valve 520 is installed at a point where the second coolant heat discharge passage 252 and the third coolant heat radiation passage 253 diverge from the coolant discharge passage 211 of the electrical component 210. it's a valve The second coolant three-way valve 520 selectively opens and closes the second coolant heat radiation passage 252 and the third coolant heat radiation passage 253 according to the operation mode.

However, the present invention is not limited thereto, and the means for opening and closing the coolant heat dissipation flow path may be a valve installed in the first, second, and third coolant heat dissipation flow paths 251, 252, and 253, respectively.

The cooling water circulation path 260 includes four first, second, third, and fourth cooling water circulation paths 261, 262, 263, and 264.

The first cooling water circulation passage 261 connects the heater core 220 and the second internal heat exchanger 320 so that the cooling water discharged after radiating heat from the heater core 220 is transferred to the second internal heat exchanger ( 320).

The second cooling water circulation passage 262 connects the second internal heat exchanger 320 and the electrical component 210 so that the cooling water passing through the second internal heat exchanger 320 is passed through the electrical component 320. ) is the euro that guides to.

A first cooling water pump P1 is installed in the second cooling water circulation path 262 .

The third cooling water circulation passage 263 is a passage connecting the discharge side of the first internal heat exchanger 320 and the first cooling water circulation passage 261 . The third cooling water circulation passage 263 is a passage for guiding the cooling water discharged from the first internal heat exchanger 320 to the second internal heat exchanger 320 .

The fourth coolant circulation passage 264 is a passage branched from the third coolant circulation passage 263 and connected to the suction side of the low-temperature radiator 230 . The fourth cooling water circulation passage 264 is a passage for guiding the cooling water discharged from the first internal heat exchanger 320 to the low-temperature radiator 230 .

A second cooling water pump P2 is installed in the fourth cooling water circulation path 264 .

The means for opening and closing the cooling water circulation path includes a third refrigerant three-way valve (530).

The third refrigerant three-way valve 530 is installed at a point where the fourth cooling water circulation path 264 diverges from the third cooling water circulation path 263 . When the third refrigerant three-way valve 530 opens the fourth coolant circulation path 264, the refrigerant circulates through the first internal heat exchanger 320 and the low-temperature radiator 230.

Meanwhile, the first internal heat exchanger 310 and the second internal heat exchanger 320 exchange heat between the refrigerant circulating in the heat pump and the cooling water circulating in the cooling water module.

The first internal heat exchanger 310 heats the cooling water that has passed through either the electric component 210 or the low-temperature radiator 230 with the refrigerant before flowing into the compressor 101 to evaporate the refrigerant. let it

The second internal heat exchanger 320 heat-exchanges the cooling water before flowing into the electric component 320 and the refrigerant from the compressor 101 to condense the refrigerant. The second internal heat exchanger 320 is installed in the cooling water suction passage 212 of the electric component 320 .

The control unit (not shown) may, according to at least one of the temperature of the cooling water discharged from the electric component 210, the heating load of the vehicle compartment, and the temperature of the outside air, the cooling water heat dissipation flow path opening and closing means, the refrigerant condensation flow path opening and closing means, the Controls the operation of the cooling water circulation passage opening and closing means, the first cooling water pump (P1) and the second cooling water pump (P2).

The temperature of the cooling water discharged from the electrical component 210 may be measured by a temperature sensor (not shown) installed in the cooling water discharge passage 211 of the electrical component 210 .

The temperature of the outside air may be measured from meteorological information or a temperature sensor (not shown) installed around the external heat exchanger 102 .

The operation according to the operation mode of the cooling and heating system for an electric vehicle according to an embodiment of the present invention configured as described above will be described as follows.

The operation mode is a mode set differently according to the cooling operation, the heating operation, the temperature of the cooling water discharged from the electric component 210, the heating load of the vehicle compartment, and the temperature of the outside air. Hereinafter, in the present embodiment, the first, second, third, fourth, fifth, sixth, and seventh operation modes according to the temperature of the cooling water discharged from the electrical component 210, the heating load of the vehicle compartment, and the temperature of the outside air during heating operation. Each is set differently, and the cooling operation is set to the eighth operation mode, for example. However, it is not limited thereto, and it is also possible to implement other driving modes depending on the configuration of the cooling and heating system for an electric vehicle according to an embodiment of the present invention.

2 is a diagram showing a first operation mode of a cooling and heating system for an electric vehicle according to an embodiment of the present invention.

Referring to FIG. 2 , the first operation mode is a heating operation of the vehicle compartment, the temperature of the cooling water discharged from the electric component 210 is less than a preset cooling water temperature, and the heating load of the vehicle compartment is a preset heating operation. It is an operation mode when the load is higher than the outside temperature and the temperature of the outside air is higher than the preset outdoor temperature.

At the beginning of winter driving, since the temperature of the cabin is very low, the heating load is considerably high, and the waste heat from the electric component 210 is not sufficient, so the first driving mode is performed.

In addition, when the temperature of the outside air is equal to or higher than the set outside air temperature, it is determined that frost does not occur in the external heat exchanger 102 .

In the first operation mode, waste heat from the electric component 210 is dissipated through the first internal heat exchanger 310 and the refrigerant is condensed using the condenser 220 .

The flow of cooling water in the first operation mode is as follows.

The controller (not shown) operates the first coolant pump P1, opens the first coolant three-way valve 510 to the first coolant heat dissipation passage 251, and opens the second coolant three-way valve 520. ) is controlled to shield both the second coolant heat dissipation passage 252 and the third coolant heat dissipation passage 253.

Also, the controller (not shown) stops the operation of the second coolant pump P2 and controls the third coolant three-way valve 540 to close the fourth coolant circulation path 264.

When the first cooling water pump P1 is operated, the cooling water cools the electrical component 210 while passing through the electrical component 210 .

The cooling water discharged from the electric component 210 flows into the first internal heat exchanger 310 through the first cooling water heat dissipation passage 251 .

In the first internal heat exchanger 310, heat exchange between the cooling water and the refrigerant is performed.

The cooling water discharged from the first internal heat exchanger 310 flows into the second internal heat exchanger 320 through the third cooling water circulation passage 263 and then is circulated back to the electrical component 210. .

The flow of refrigerant in the first operation mode is as follows.

The controller (not shown) operates the compressor 101, and the first refrigerant three-way valve 410 opens the first refrigerant condensation passage 111 and the second refrigerant condensation passage 112. Control to shield. Also, the controller (not shown) controls the second refrigerant three-way valve 420 to close the first refrigerant evaporation passage 121 and open the second refrigerant evaporation passage 122 .

When the compressor 101 is operated, the high-temperature and high-pressure refrigerant compressed in the compressor 101 is discharged through the discharge passage 101b of the compressor 101 .

When the first refrigerant condensing passage 111 is opened, the refrigerant discharged from the compressor 101 flows into the condenser 104 through the first refrigerant condensing passage 111 .

In the condenser 104, heat exchange is performed between the air introduced into the vehicle compartment and the refrigerant, the refrigerant is condensed, and the air receiving heat from the refrigerant flows into the vehicle compartment to heat the vehicle compartment.

The refrigerant condensed in the condenser 104 flows into the second internal heat exchanger bypass passage 132 and bypasses the second internal heat exchanger 132 . At this time, the second internal heat exchanger intake valve 161 is shielded.

The refrigerant introduced into the second internal heat exchanger bypass passage 132 is expanded in the expansion valve 140 for heating and the temperature is lowered, and then introduced into the external heat exchanger 102 . At this time, the expansion valve 140 for heating is open, and the check valve 162 for cooling is closed.

In the external heat exchanger 102, heat exchange between the refrigerant and the outside air is performed. The external heat exchanger 102 serves as a refrigerant evaporator. In the external heat exchanger 102, the refrigerant absorbs heat from the outside air and evaporates.

The refrigerant evaporated in the external heat exchanger 102 flows into the first internal heat exchanger 310 .

The refrigerant introduced into the first internal heat exchanger 310 is evaporated through heat exchange with cooling water that has absorbed waste heat from the electric component 210 .

That is, the refrigerant first absorbs the heat of evaporation in the external heat exchanger 102 and then secondarily absorbs the heat of evaporation in the first internal heat exchanger 310, thereby improving the coefficient of performance (COP) of the heat pump. It can be.

The refrigerant discharged from the first internal heat exchanger 310 circulates to the compressor 101 .

Therefore, in the first operation mode corresponding to the beginning of winter operation, since the waste heat of the electric component 210 is not sufficient, the waste heat of the electric component 210 is transferred to the refrigerant through the first internal heat exchanger 310. and heat the vehicle air through the condenser 104.

Meanwhile, FIG. 3 is a diagram showing a second operation mode of the cooling and heating system for an electric vehicle according to an embodiment of the present invention.

Referring to FIG. 3 , the second operation mode is the heating operation, the temperature of the cooling water discharged from the electric component 210 is equal to or greater than the set cooling water temperature, the heating load is equal to or greater than the set heating load, and the outdoor air It is an operation mode when the temperature of is higher than the set outdoor temperature.

The second driving mode is performed when the temperature of the coolant discharged from the electric component 210 is equal to or higher than the preset coolant temperature as the heating value of the electric component 210 increases as a predetermined time elapses after the vehicle is driven. That is, in the second operation mode, the waste heat of the electric component 210 is more sufficient than in the first operation mode.

In the second operation mode, waste heat from the electric component 210 is dissipated through the heater core 220, and the refrigerant is condensed using the second internal heat exchanger 320.

The flow of cooling water in the second operation mode is as follows.

The control unit (not shown) operates the first coolant pump P1, the first coolant three-way valve 510 blocks the first coolant heat dissipation passage 251, and the second coolant three-way valve 520 ) controls the second coolant heat dissipation passage 252 to be open and the third coolant heat dissipation passage 253 to be shielded.

Also, the controller (not shown) stops the operation of the second coolant pump P2 and controls the third coolant three-way valve 540 to close the fourth coolant circulation path 264.

When the first cooling water pump P1 is operated, the cooling water cools the electrical component 210 while passing through the electrical component 210 .

The cooling water discharged from the electric component 210 flows into the heater core 220 through the second cooling water heat dissipation passage 252 .

Waste heat from the electric component 210 may be transferred to the heater core 220 as it is except for heat loss generated in the flow path. Accordingly, heat exchange efficiency in the heater core 220 may be improved, and heating efficiency may be improved. In the heater core 220, heat exchange between air introduced into the vehicle compartment and cooling water is performed.

The air that has received heat from the cooling water in the heater core 220 flows into the vehicle interior and heats the vehicle compartment.

The cooling water radiating heat from the heater core 220 flows into the second internal heat exchanger 320 through the first cooling water circulation path 261 .

In the second internal heat exchanger 320, heat exchange between the cooling water discharged from the heater core 220 and the high-temperature and high-pressure refrigerant discharged from the compressor 101 is performed. In the second internal heat exchanger 320, the cooling water absorbs heat from the refrigerant, and the refrigerant loses heat to the cooling water and is condensed.

The cooling water that has passed through the second internal heat exchanger 320 is circulated to the electric component 210 through the second cooling water circulation path 262 .

As described above, in the second operation mode, the heat of the cooling water discharged from the electric component 210 is dissipated from the heater core 220 .

The flow of refrigerant in the second operation mode is as follows.

The control unit (not shown) operates the compressor 101, the first refrigerant three-way valve 410 shields the first refrigerant condensation path 111, and the second refrigerant condensation path 112 control to open. Also, the controller (not shown) controls the second refrigerant three-way valve 420 to close the first refrigerant evaporation passage 121 and open the second refrigerant evaporation passage 122 .

When the compressor 101 is operated and the second refrigerant condensing passage 112 is opened, the refrigerant discharged from the compressor 101 passes through the second refrigerant condensing passage 112 to the second internal heat exchanger 320. ) is introduced into At this time, the second internal heat exchanger suction valve 161 is opened.

In the second internal heat exchanger 320, heat exchange between the cooling water discharged from the heater core 220 and the high-temperature and high-pressure refrigerant discharged from the compressor 101 is performed. At this time, the second internal heat exchanger 320 serves as a condenser for the refrigerant.

The refrigerant condensed while passing through the second internal heat exchanger 320 expands in the expansion valve 140 for heating and lowers in temperature, and then flows into the external heat exchanger 102 . At this time, the expansion valve 140 for heating is open, and the check valve 162 for cooling is closed.

In the external heat exchanger 102, heat exchange between the refrigerant and the outside air is performed. The external heat exchanger 102 serves as a refrigerant evaporator. In the external heat exchanger 102, the refrigerant absorbs heat from the outside air and evaporates.

The refrigerant evaporated in the external heat exchanger 102 is circulated to the compressor 101 through the third refrigerant three-way valve 430 after passing through the first internal heat exchanger 310 .

At this time, heat exchange is not performed in the first internal heat exchanger 310 .

Therefore, since the waste heat of the electrical component 210 is sufficient in the second driving mode, the heating effect of the vehicle interior can be improved by directly transferring the waste heat of the electrical component 210 to the heater core 220. there is. In addition, by condensing the refrigerant by exchanging heat between the refrigerant and the cooling water in the second internal heat exchanger 320, the condensation temperature of the refrigerant is lowered and the compression ratio is lowered, thereby improving the coefficient of performance of the refrigerant cycle.

Meanwhile, FIG. 4 is a diagram showing a third operation mode of the cooling and heating system for an electric vehicle according to an embodiment of the present invention.

Referring to FIG. 4 , the third operation mode is the heating operation, the temperature of the cooling water discharged from the electric component 210 is equal to or greater than the set cooling water temperature, the heating load is equal to or greater than the set heating load, and the outdoor air It is an operation mode when the temperature of is less than the set outdoor temperature.

In the third driving mode, the amount of heat generated by the electric component 210 increases as a predetermined time elapses after the vehicle is driven, and the waste heat of the electric component 210 is sufficient, but the temperature of the outside air is lower than the set outdoor air temperature. It is an operation mode when frosting easily occurs in the external heat exchanger 102 due to extreme temperature.

In the third operation mode, since the waste heat of the electric component 210 is sufficient, the waste heat of the electric component 210 is radiated through the heater core 220, and the refrigerant is supplied to the second internal heat exchanger 320. condensed using

The flow of cooling water in the third operation mode is as follows.

In the third operation mode, two first and second cooling water cycles in which the cooling water is not mixed are formed in the circulation cycle of the cooling water.

The first cooling water cycle is a cycle in which cooling water is circulated according to the operation of the first cooling water pump P1.

The control unit (not shown) operates the first coolant pump P1, the first coolant three-way valve 510 blocks the first coolant heat dissipation passage 251, and the second coolant three-way valve 520 ) controls the second coolant heat dissipation passage 252 to be open and the third coolant heat dissipation passage 253 to be shielded.

When the first coolant pump P1 is operated and the second coolant heat dissipation passage 252 is opened, the coolant discharged from the electric component 210 passes through the second coolant heat dissipation passage 252 to the heater core ( 220), it is circulated to the electric component 210 via the second internal heat exchanger 320.

The air that has received heat from the cooling water in the heater core 220 flows into the vehicle interior and heats the vehicle compartment.

The cooling water radiating heat from the heater core 220 flows into the second internal heat exchanger 320 through the first cooling water circulation path 261 .

In the second internal heat exchanger 320, heat exchange between the cooling water discharged from the heater core 220 and the high-temperature and high-pressure refrigerant discharged from the compressor 101 is performed. In the second internal heat exchanger 320, the cooling water absorbs heat from the refrigerant, and the refrigerant loses heat to the cooling water and is condensed.

The cooling water that has passed through the second internal heat exchanger 320 is circulated to the electric component 210 through the second cooling water circulation path 262 .

As described above, in the second operation mode, the heat of the cooling water discharged from the electric component 210 is dissipated from the heater core 220 .

Meanwhile, the second cooling water cycle is a low-temperature cooling water cycle in which cooling water is circulated according to the operation of the second cooling water pump P2.

When the controller (not shown) operates the second coolant pump P2 and the third coolant three-way valve 540 opens the fourth coolant circulation passage 264, the coolant is supplied to the second coolant pump ( P2), the fourth cooling water circulation path 264, the low-temperature radiator 230, the first internal heat exchanger 310, the third cooling water circulation path 264 and the fourth cooling water circulation path 264 ) and is circulated back to the second cooling water pump (P2).

In the low-temperature radiator 230, the cooling water exchanges heat with outside air, and in the first internal heat exchanger 310, heat exchanges with the refrigerant.

Therefore, the coolant circulating in the first coolant cycle exchanges heat with the air before being introduced into the vehicle from the heater core 220, and the coolant circulating in the second coolant cycle passes through the low-temperature radiator 230 to the outside air. exchange heat

The flow of refrigerant in the second operation mode is as follows.

The control unit (not shown) operates the compressor 101, the first refrigerant three-way valve 410 shields the first refrigerant condensation path 111, and the second refrigerant condensation path 112 control to open. In addition, the controller (not shown) controls the second refrigerant three-way valve 420 to open the first refrigerant evaporation passage 121 and to close the second refrigerant evaporation passage 122 .

When the compressor 101 is operated and the second refrigerant condensing passage 112 is opened, the refrigerant discharged from the compressor 101 passes through the second refrigerant condensing passage 112 to the second internal heat exchanger 320. ) is introduced into At this time, the second internal heat exchanger suction valve 161 is opened.

In the second internal heat exchanger 320, heat exchange between the cooling water discharged from the heater core 220 and the high-temperature and high-pressure refrigerant discharged from the compressor 101 is performed. At this time, the second internal heat exchanger 320 serves as a condenser for the refrigerant.

The refrigerant condensed while passing through the second internal heat exchanger 320 expands in the expansion valve 140 for heating and lowers in temperature, and then flows into the first internal heat exchanger 310 . At this time, the expansion valve 140 for heating is open, and the check valve 162 for cooling is closed.

In the first internal heat exchanger 310, heat exchange between the refrigerant and the cooling water circulating in the second cooling water cycle is performed. In the first internal heat exchanger 310, the refrigerant absorbs heat from the cooling water and evaporates.

The refrigerant evaporated in the first internal heat exchanger 310 is circulated to the compressor 101 through the third refrigerant three-way valve 430 .

Therefore, in the third operation mode, even if frost occurs in the external heat exchanger 102 due to an extreme temperature of the outside air even though the waste heat of the electric component 210 is sufficient, the waste heat of the electric component 210 There is an advantage in that the heat is directly transferred to the heater core 220 and both the first internal heat exchanger 310 and the second internal heat exchanger 320 can be utilized.

Meanwhile, FIG. 5 is a diagram illustrating a fourth operation mode of the cooling and heating system for an electric vehicle according to an embodiment of the present invention.

Referring to FIG. 5 , the fourth driving mode is the cabin heating operation, the temperature of the cooling water discharged from the electrical component 210 is less than the set cooling water temperature, and the heating load of the cabin is greater than or equal to the set heating load. , and is in the operation mode when the outdoor air temperature is less than the set outdoor air temperature.

The fourth driving mode is an operation performed when the waste heat of the electrical component 210 is not sufficient due to continuous low-temperature operation of the vehicle, etc., and the external heat exchanger 102 is frosted and evaporation heat cannot be secured from the outside air. it's a mode

In the fourth operation mode, waste heat from the electric component 210 is dissipated through the first internal heat exchanger 310 and the refrigerant is condensed using the condenser 220 .

The flow of cooling water in the fourth operation mode is as follows.

The controller (not shown) operates the first coolant pump P1, opens the first coolant three-way valve 510 to the first coolant heat dissipation passage 251, and opens the second coolant three-way valve 520. ) is controlled to shield both the second coolant heat dissipation passage 252 and the third coolant heat dissipation passage 253.

Also, the controller (not shown) stops the operation of the second coolant pump P2 and controls the third coolant three-way valve 540 to close the fourth coolant circulation path 264.

When the first cooling water pump P1 is operated, the cooling water cools the electrical component 210 while passing through the electrical component 210 .

The cooling water discharged from the electric component 210 flows into the first internal heat exchanger 310 through the first cooling water heat dissipation passage 251 .

In the first internal heat exchanger 310, heat exchange between the cooling water and the refrigerant is performed.

The cooling water discharged from the first internal heat exchanger 310 flows into the second internal heat exchanger 320 through the third cooling water circulation passage 263 and then is circulated back to the electrical component 210. .

As described above, in the first operation mode, the heat of the cooling water discharged from the electric component 210 is dissipated from the first internal heat exchanger 310 .

The flow of refrigerant in the fourth operation mode is as follows.

The controller (not shown) operates the compressor 101, and the first refrigerant three-way valve 410 opens the first refrigerant condensation passage 111 and the second refrigerant condensation passage 112. Control to shield.

In addition, the controller (not shown) controls the second refrigerant three-way valve 420 to open the first refrigerant evaporation passage 121 and to close the second refrigerant evaporation passage 122 .

When the first refrigerant condensing passage 111 is opened, the refrigerant discharged from the compressor 101 flows into the condenser 104 through the first refrigerant condensing passage 111 .

In the condenser 104, heat exchange is performed between the air introduced into the vehicle compartment and the refrigerant, the refrigerant is condensed, and the air receiving heat from the refrigerant flows into the vehicle compartment to heat the vehicle compartment.

The refrigerant condensed in the condenser 104 flows into the second internal heat exchanger bypass passage 132 and bypasses the second internal heat exchanger 132 . At this time, the second internal heat exchanger intake valve 161 is shielded.

The refrigerant introduced into the second internal heat exchanger bypass passage 132 is expanded in the expansion valve 140 for heating and the temperature thereof decreases. At this time, the expansion valve 140 for heating is open, and the check valve 162 for cooling is closed.

When the first refrigerant evaporation passage 121 is opened, the refrigerant expanded by the heating expansion valve 140 flows into the first internal heat exchanger 310 .

The refrigerant introduced into the first internal heat exchanger 310 is evaporated through heat exchange with cooling water that has absorbed waste heat from the electric component 210 .

Therefore, since the external heat exchanger 102 is not utilized in the fourth operation mode, the evaporation heat of the refrigerant can be secured through the cooling water in the first internal heat exchanger 310 . Since the temperature of the cooling water is higher than the outside air temperature in winter, the evaporation temperature rises and the compression ratio decreases, so power consumption of the compressor can be reduced.

6 is a diagram illustrating a fifth operation mode of the cooling and heating system for an electric vehicle according to an embodiment of the present invention.

Referring to FIG. 6 , the fifth operation mode is the heating operation, the temperature of the cooling water discharged from the electric component 210 is less than the set cooling water temperature, the heating load is greater than or equal to the set heating load, and the outdoor air It is an operation mode when the temperature of is less than the set outdoor temperature.

The fifth operation mode is a defrost operation mode for removing frost generated in the external heat exchanger 102 when waste heat from the electric component 210 is insufficient.

In addition, when the temperature of the coolant reaches a preset minimum temperature while the fourth operation mode is performed, the fifth operation mode may be switched.

In the fifth operation mode, waste heat from the electric component 210 is dissipated through the heater core 220 .

The flow of cooling water in the fifth operation mode is as follows.

The control unit (not shown) operates the first coolant pump P1, the first coolant three-way valve 510 blocks the first coolant heat dissipation passage 251, and the second coolant three-way valve 520 ) controls the second coolant heat dissipation passage 252 to be open and the third coolant heat dissipation passage 253 to be shielded.

Also, the controller (not shown) stops the operation of the second coolant pump P2 and controls the third coolant three-way valve 540 to close the fourth coolant circulation path 264.

When the first coolant pump P1 is operated, the coolant discharged from the electric component 210 flows into the heater core 220 through the second coolant heat dissipation passage 252 .

The air that has received heat from the cooling water in the heater core 220 flows into the vehicle interior and heats the vehicle compartment.

The cooling water radiating heat from the heater core 220 flows into the second internal heat exchanger 320 through the first cooling water circulation path 261 .

In the second internal heat exchanger 320, heat exchange between the cooling water discharged from the heater core 220 and the high-temperature and high-pressure refrigerant discharged from the compressor 101 is performed. In the second internal heat exchanger 320, the cooling water absorbs heat from the refrigerant, and the refrigerant loses heat to the cooling water and is condensed.

The cooling water that has passed through the second internal heat exchanger 320 is circulated to the electric component 210 through the second cooling water circulation path 262 .

As described above, the heat of the cooling water discharged from the electric component 210 in the fifth operation mode is dissipated from the heater core 220 .

The flow of refrigerant in the fifth operation mode is as follows.

The control unit (not shown) operates the compressor 101, the first refrigerant three-way valve 410 shields the first refrigerant condensation path 111, and the second refrigerant condensation path 112 control to open.

Also, the controller (not shown) controls the second refrigerant three-way valve 420 to close the first refrigerant evaporation passage 121 and open the second refrigerant evaporation passage 122 .

Also, the controller (not shown) closes the expansion valve 140 for heating and opens the check valve 162 for cooling.

When the compressor 101 is operated and the second refrigerant condensing passage 112 is opened, the refrigerant discharged from the compressor 101 passes through the second refrigerant condensing passage 112 to the second internal heat exchanger 320. ) is introduced into At this time, the second internal heat exchanger suction valve 161 is opened.

In the second internal heat exchanger 320, heat exchange between the cooling water discharged from the heater core 220 and the high-temperature and high-pressure refrigerant discharged from the compressor 101 is performed. At this time, the second internal heat exchanger 320 serves as a condenser for the refrigerant.

The refrigerant condensed while passing through the second internal heat exchanger 320 bypasses the expansion valve 140 for heating and then flows into the external heat exchanger 102 . At this time, the expansion valve 140 for heating is closed, and the check valve 162 for cooling is open.

Therefore, since the high-temperature refrigerant passes through the external heat exchanger 102, frost generated in the external heat exchanger 102 can be removed.

In addition, while the frost is removed as described above, waste heat from the electric component 210 is transferred to the heater core 220 to heat the vehicle interior.

7 is a diagram showing a sixth operation mode of a cooling and heating system for an electric vehicle according to an embodiment of the present invention.

Referring to FIG. 7 , the sixth operation mode is the heating operation, the temperature of the cooling water discharged from the electric component 210 is equal to or greater than the preset cooling water temperature, the heating load is less than the preset heating load, and the outdoor air It is an operation mode when the temperature of is higher than the set outdoor temperature.

That is, the sixth operation mode is performed when the amount of waste heat of the electric component 210 is sufficient, but the heating load is not large.

The sixth operation mode is the same as the first operation mode in which waste heat from the electric component 210 is dissipated through the first internal heat exchanger 310 and refrigerant is condensed using the condenser 220 .

A flow of cooling water in the sixth operation mode is as follows.

The controller (not shown) operates the first coolant pump P1, opens the first coolant three-way valve 510 to the first coolant heat dissipation passage 251, and opens the second coolant three-way valve 520. ) is controlled to shield both the second coolant heat dissipation passage 252 and the third coolant heat dissipation passage 253.

Also, the controller (not shown) stops the operation of the second coolant pump P2 and controls the third coolant three-way valve 540 to close the fourth coolant circulation path 264.

When the first cooling water pump P1 is operated, the cooling water cools the electrical component 210 while passing through the electrical component 210 .

The cooling water discharged from the electric component 210 flows into the first internal heat exchanger 310 through the first cooling water heat dissipation passage 251 .

In the first internal heat exchanger 310, heat exchange between the cooling water and the refrigerant is performed.

The cooling water discharged from the first internal heat exchanger 310 flows into the second internal heat exchanger 320 through the third cooling water circulation passage 263 and then is circulated back to the electrical component 210. .

As described above, in the sixth operation mode, the heat of the cooling water discharged from the electrical component 210 is dissipated from the first internal heat exchanger 310 .

The flow of refrigerant in the sixth operation mode is as follows.

The controller (not shown) operates the compressor 101, and the first refrigerant three-way valve 410 opens the first refrigerant condensation passage 111 and the second refrigerant condensation passage 112. Control to shield. Also, the controller (not shown) controls the second refrigerant three-way valve 420 to close the first refrigerant evaporation passage 121 and open the second refrigerant evaporation passage 122 .

When the compressor 101 is operated, the high-temperature and high-pressure refrigerant compressed in the compressor 101 is discharged through the discharge passage 101b of the compressor 101 .

When the first refrigerant condensing passage 111 is opened, the refrigerant discharged from the compressor 101 flows into the condenser 104 through the first refrigerant condensing passage 111 .

In the condenser 104, heat exchange is performed between the air introduced into the vehicle compartment and the refrigerant, the refrigerant is condensed, and the air receiving heat from the refrigerant flows into the vehicle compartment to heat the vehicle compartment.

The refrigerant condensed in the condenser 104 flows into the second internal heat exchanger bypass passage 132 and bypasses the second internal heat exchanger 132 . At this time, the second internal heat exchanger intake valve 161 is shielded.

The refrigerant introduced into the second internal heat exchanger bypass passage 132 is expanded in the expansion valve 140 for heating and the temperature is lowered, and then introduced into the external heat exchanger 102 . At this time, the expansion valve 140 for heating is open, and the check valve 162 for cooling is closed.

In the external heat exchanger 102, heat exchange between the refrigerant and the outside air is performed. The external heat exchanger 102 serves as a refrigerant evaporator. In the external heat exchanger 102, the refrigerant absorbs heat from the outside air and evaporates.

The refrigerant evaporated in the external heat exchanger 102 flows into the first internal heat exchanger 310 .

The refrigerant introduced into the first internal heat exchanger 310 exchanges heat with cooling water that has absorbed waste heat from the electric component 210 and is evaporated.

That is, the refrigerant primarily absorbs the evaporation heat in the external heat exchanger 102 and then secondarily absorbs the evaporation heat in the first internal heat exchanger 310, thereby improving the coefficient of performance (COP) of the heat pump. It can be.

The refrigerant discharged from the first internal heat exchanger 310 circulates to the compressor 101 .

Therefore, in the sixth operation mode where the electrical component 210 generates enough waste heat but the heating load is not large, the waste heat of the electrical component 210 is transferred to the refrigerant of the heat pump through the first internal heat exchanger 310. can be forwarded to

8 is a diagram showing a seventh operation mode of the cooling and heating system for an electric vehicle according to an embodiment of the present invention.

Referring to FIG. 8 , the seventh operation mode is the heating operation, the temperature of the cooling water discharged from the electric component 210 is equal to or higher than the set cooling water temperature, and the heating load of the vehicle compartment is less than the set heating load; It is an operation mode when the outdoor air temperature is less than the set outdoor air temperature.

The seventh operation mode is an operation mode performed when the amount of waste heat of the electric component 210 is sufficient, but the amount of evaporation heat cannot be secured from the outside air due to frost in the external heat exchanger 102 .

In the seventh operation mode, waste heat from the electric component 210 is radiated through the low-temperature radiator 230, which is different from other operation modes.

In the low-temperature radiator 230, since the high-temperature cooling water and outdoor air exchange heat, frosting does not occur even if the temperature of the outdoor air is less than the set outdoor temperature.

In addition, the amount of evaporation heat of the heat pump can be secured from the cooling water that has passed through the low-temperature radiator 230 .

A flow of cooling water in the seventh operation mode is as follows.

The control unit (not shown) operates the first coolant pump P1, the first coolant three-way valve 510 blocks the first coolant heat dissipation passage 251, and the second coolant three-way valve 520 ) controls the second coolant heat dissipation passage 252 to be shielded and the third coolant heat dissipation passage 253 to be opened.

Also, the controller (not shown) stops the operation of the second coolant pump P2 and controls the third coolant three-way valve 540 to close the fourth coolant circulation path 264.

Therefore, the cooling water discharged from the electric component 210 flows into the low-temperature radiator 230 through the third cooling water dissipation passage 253 .

In the low-temperature radiator 230, heat exchange between the cooling water and the outside air is performed.

Cooling water discharged after radiating heat from the low-temperature radiator 230 flows into the first internal heat exchanger 310 .

In the first internal heat exchanger 310, heat exchange between cooling water and refrigerant is performed.

Cooling water that has lost heat to the refrigerant in the first internal heat exchanger 310 is circulated back to the electrical component 210 through the third cooling water circulation path 263 .

The flow of refrigerant in the seventh operation mode is as follows.

The flow of refrigerant in the seventh operation mode is the same as in the fourth operation mode.

The controller (not shown) operates the compressor 101, and the first refrigerant three-way valve 410 opens the first refrigerant condensation passage 111 and the second refrigerant condensation passage 112. Control to shield.

In addition, the controller (not shown) controls the second refrigerant three-way valve 420 to open the first refrigerant evaporation passage 121 and to close the second refrigerant evaporation passage 122 .

When the first refrigerant condensing passage 111 is opened, the refrigerant discharged from the compressor 101 flows into the condenser 104 through the first refrigerant condensing passage 111 .

In the condenser 104, heat exchange is performed between the air introduced into the vehicle compartment and the refrigerant, the refrigerant is condensed, and the air receiving heat from the refrigerant flows into the vehicle compartment to heat the vehicle compartment.

The refrigerant condensed in the condenser 104 flows into the second internal heat exchanger bypass passage 132 and bypasses the second internal heat exchanger 132 . At this time, the second internal heat exchanger intake valve 161 is shielded.

The refrigerant introduced into the second internal heat exchanger bypass passage 132 is expanded in the expansion valve 140 for heating and the temperature thereof decreases. At this time, the expansion valve 140 for heating is open, and the check valve 162 for cooling is closed.

In addition, when the first refrigerant evaporation passage 121 is opened, the refrigerant expanded in the heating expansion valve 140 flows into the first internal heat exchanger 310 .

The refrigerant introduced into the first internal heat exchanger 310 is evaporated by receiving heat from the cooling water passing through the low-temperature radiator 230 .

Therefore, in the seventh operation mode, since the external heat exchanger 102 is not utilized, the coolant absorbing the waste heat of the electric component 210 is radiated through the low-temperature radiator 230, and the amount of evaporation heat of the refrigerant may be obtained from cooling water that has passed through the low-temperature radiator 230 in the first internal heat exchanger 310 .

9 is a diagram illustrating an eighth operation mode of a cooling and heating system for an electric vehicle according to an embodiment of the present invention.

Referring to FIG. 9 , the eighth driving mode is a driving mode for cooling the vehicle cabin.

The flow of cooling water in the eighth operation mode is as follows.

In the eighth operation mode, waste heat from the electric component 210 is dissipated through the low-temperature radiator 230, and the refrigerant is condensed in the second internal heat exchanger 320 and the external heat exchanger 102.

The control unit (not shown) operates the first coolant pump P1, the first coolant three-way valve 510 blocks the first coolant heat dissipation passage 251, and the second coolant three-way valve 520 ) controls the second coolant heat dissipation passage 252 to be shielded and the third coolant heat dissipation passage 253 to be opened.

Also, the controller (not shown) stops the operation of the second coolant pump P2 and controls the third coolant three-way valve 540 to close the fourth coolant circulation path 264.

Therefore, the cooling water discharged from the electric component 210 flows into the low-temperature radiator 230 through the third cooling water dissipation passage 253 .

In the low-temperature radiator 230, heat exchange between the cooling water and the outside air is performed.

The cooling water discharged from the low-temperature radiator 230 passes through the first internal heat exchanger 310 and then flows into the second internal heat exchanger 320 through the third cooling water circulation path 263. At this time, heat exchange is not performed in the first internal heat exchanger 310 .

In the second internal heat exchanger 320, heat exchange between cooling water and refrigerant is performed. Since the temperature of the cooling water introduced into the second internal heat exchanger 320 is lower than the temperature of the refrigerant discharged from the compressor 101, the heat of the refrigerant is transferred to the cooling water. Since the temperature of the refrigerant discharged from the compressor 101 is higher than the temperature of the coolant discharged from the low temperature radiator 230, the refrigerant is condensed in the second internal heat exchanger 320.

Cooling water that has absorbed heat in the second internal heat exchanger 320 is circulated to the electrical component 210 . At this time, even if the cooling water absorbs heat from the refrigerant, the temperature of the cooling water is lower than about 150 to 170° C. which is the limit temperature of the electric component 210 . Therefore, the cooling water can sufficiently absorb heat from the refrigerant in the second internal heat exchanger 320 .

The flow of refrigerant in the eighth operation mode is as follows.

The control unit (not shown) operates the compressor 101, the first refrigerant three-way valve 410 shields the first refrigerant condensation path 111, and the second refrigerant condensation path 112 control to open.

Also, the controller (not shown) controls the second refrigerant three-way valve 420 to close the first refrigerant evaporation passage 121 and open the second refrigerant evaporation passage 122 .

Also, the control unit (not shown) closes the expansion valve 140 for heating and opens the check valve 162 for cooling.

Therefore, the refrigerant discharged from the compressor 101 flows into the second internal heat exchanger 320 to absorb heat from the cooling water, passes through the cooling check valve 162, and then enters the external heat exchanger ( 102).

In the second internal heat exchanger 320, heat exchange between the cooling water discharged from the low-temperature radiator 230 and the high-temperature refrigerant discharged from the compressor 101 is performed. At this time, the second internal heat exchanger 320 serves as a condenser for the refrigerant. Since the temperature of the refrigerant discharged from the compressor 101 is higher than the temperature of the coolant discharged from the low temperature radiator 320, the refrigerant is condensed in the second internal heat exchanger 320.

Conventionally, in the case of an electric vehicle operating at a high temperature, the size of the external heat exchanger 102 serving as a condenser had to be increased in order to cope with the condensation heat of the refrigerant, but in the present invention, the second internal heat exchanger Since the condenser 320 can be used as a condenser, the condensation heat of the refrigerant can be distributed to the second internal heat exchanger 320 as well as the external heat exchanger 102 . Therefore, the size of the external heat exchanger 102 can be compacted.

The refrigerant condensed while passing through the second internal heat exchanger 320 flows into the external heat exchanger 102 through the cooling check valve 162 . That is, during the cooling operation, the expansion valve 140 for heating is closed and the check valve 162 for cooling is open.

In the external heat exchanger 102, heat exchange between the refrigerant and the outside air is performed. The external heat exchanger 102 serves as a refrigerant condenser. The refrigerant is condensed in the external heat exchanger (102).

The refrigerant condensed in the external heat exchanger 102 passes through the third refrigerant three-way valve 430 and flows into the expansion valve 150 for cooling.

The refrigerant expanded by the expansion valve 150 for cooling and turned into a low-temperature, low-pressure state flows into the evaporator 103 .

In the evaporator 103, the refrigerant and the air introduced into the cabin are heat-exchanged, and the air cooled by the refrigerant is supplied to the cabin. At this time, since the air flip 12 blocks the passage flowing into the heater core 220, the air cooled by the evaporator 103 in the air conditioning compartment 10 can be supplied to the vehicle compartment. .

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims.

101: compressor 102: external heat exchanger
103: evaporator 104: condenser
111: first refrigerant condensation channel 112: second refrigerant condensation channel
121: first refrigerant evaporation path 122: second refrigerant evaporation path
131: first internal heat exchanger bypass flow path
132: second internal heat exchanger bypass flow path
133: expansion valve bypass flow path for heating
140: expansion valve for heating 150: expansion valve for cooling
210: electrical component 210: heater core
230: low-temperature radiator 251: first cooling water cooling passage
252: second cooling water radiation passage 253: third cooling water radiation passage
261: first cooling water circulation path 262: second cooling water circulation path
263: third cooling water circulation path 264: fourth cooling water circulation path
310: first internal heat exchanger 320: second internal heat exchanger
410: first refrigerant three-way valve 420: second refrigerant three-way valve
430: third refrigerant three-way valve
510: first cooling water three-way valve 520: second cooling water three-way valve
530: third coolant three-way valve
P1: 1st cooling water pump P2: 2nd cooling water pump

Claims (18)

A compressor for compressing the refrigerant, an external heat exchanger for heat exchange between the refrigerant and outside air, an evaporator for heat exchange of the refrigerant with the air flowing into the cabin during the cooling operation of the cabin, and the air flowing into the cabin during the heating operation of the cabin. A heat pump including a condenser for exchanging heat with the heat pump;
a heater core for heating the vehicle interior by exchanging heat with the air flowing into the vehicle compartment from the cooling water that cooled the electrical components;
a low-temperature radiator for exchanging heat with the outside air to cool the electric component and dissipating the heat of the cooling water to the outside air;
a first internal heat exchanger for evaporating the refrigerant by exchanging heat with the refrigerant before flowing into the compressor;
a second internal heat exchanger for condensing the refrigerant by exchanging heat with the refrigerant discharged from the compressor;
a first cooling water heat dissipation passage branched from the cooling water discharge passage of the electric component and connected to a suction side of the first internal heat exchanger;
a second coolant heat dissipation passage branched off from the coolant discharge passage of the electric component and connected to a suction side of the heater core;
a third coolant heat dissipation passage branched off from the coolant discharge passage of the electric component and connected to a suction side of the low-temperature radiator;
a first refrigerant condensing passage branched from the discharge passage of the compressor and connected to a suction side of the condenser;
a second refrigerant condensing passage branched off from the discharge passage of the compressor and connected to a suction side of the second internal heat exchanger;
a cooling water radiating flow path opening and closing means for selectively opening and closing the first coolant radiating flow path, the second coolant radiating flow path, and the third coolant radiating flow path;
a refrigerant condensation passage opening and closing means for selectively opening and closing the first refrigerant condensation passage and the second refrigerant condensation passage;
A control unit for controlling the operation of the cooling water heat dissipation flow passage opening and closing means and the refrigerant condensation flow passage opening and closing means according to at least one of a temperature of the cooling water discharged from the electric component, a heating load of the vehicle compartment, and the temperature of the outside air;
A first coolant circulation passage connecting the discharge side of the heater core and the suction side of the second internal heat exchanger;
A second cooling water circulation passage connecting the discharge side of the second internal heat exchanger and the suction side of the electrical component;
a third cooling water circulation passage connecting the discharge side of the first internal heat exchanger and the first cooling water circulation passage;
a fourth cooling water circulation path branched off from the third cooling water circulation path and connected to a suction side of the low-temperature radiator to guide the cooling water discharged from the first internal heat exchanger to the low-temperature radiator;
a first cooling water pump installed in the second cooling water circulation passage;
a second coolant pump installed in the fourth coolant circulation passage;
The heating and cooling system for an electric vehicle further comprising a third cooling water three-way valve installed at a point where the fourth cooling water circulation path diverges from the third cooling water circulation path. The method of claim 1,
The cooling water radiating passage opening and closing means,
a first coolant three-way valve installed at a point where the first coolant heat dissipation passage diverges from the coolant discharge passage of the electric component;
A cooling and heating system for an electric vehicle comprising a second coolant three-way valve installed at a point where the second coolant heat discharge passage and the third coolant heat discharge passage diverge from the coolant discharge passage of the electrical component. delete The method of claim 1,
The refrigerant condensed oil opening and closing means,
A first refrigerant three-way valve installed at a point where the first refrigerant condensation passage and the second refrigerant condensation passage diverge from the discharge passage of the compressor to selectively open and close the first refrigerant condensation passage and the second refrigerant condensation passage. A cooling and heating system for an electric vehicle comprising a. The method of claim 4,
The heat pump,
An expansion valve for heating that expands the refrigerant condensed and discharged from any one of the second internal heat exchanger and the condenser during the heating operation;
A first refrigerant evaporation passage branched from the refrigerant discharge passage of the heating expansion valve and connected to the suction side of the first internal heat exchanger;
a second refrigerant evaporation passage branched from the refrigerant discharge passage of the expansion valve for heating and connected to the external heat exchanger;
Further comprising a refrigerant evaporation passage opening and closing means for selectively opening and closing the first refrigerant evaporation passage and the second refrigerant evaporation passage,
The control unit controls the operation of the opening and closing means for the refrigerant evaporation flow according to the temperature of the cooling water discharged from the electric component, the heating load of the vehicle compartment, and the temperature of the outside air. The method of claim 5,
The refrigerant evaporation path opening and closing means,
and a second refrigerant three-way valve installed at a point where the first refrigerant evaporation passage and the second refrigerant evaporation passage diverge from the refrigerant discharge passage of the expansion valve for heating. The method of claim 6,
The heat pump,
an external heat exchanger refrigerant discharge passage connecting the external heat exchanger and the first internal heat exchanger;
a first internal heat exchanger refrigerant discharge passage connecting the first internal heat exchanger and the compressor;
A first internal heat exchanger bypass flow path branched from the external heat exchanger refrigerant discharge path and connected to the first internal heat exchanger refrigerant discharge path, and configured to bypass the first internal heat exchanger during the cooling operation;
An evaporator suction passage branched from the first internal heat exchanger refrigerant discharge passage and connected to the evaporator to guide the refrigerant to the evaporator during the cooling operation;
The cooling/heating system for an electric vehicle further comprising an expansion valve for cooling installed in the evaporator suction passage to expand the refrigerant during the cooling operation. The method of claim 6,
The heat pump,
An expansion valve bypass flow path for heating branched from a flow path connecting the second internal heat exchanger and the expansion valve for heating, formed to bypass the expansion valve for heating, and guiding the refrigerant to bypass the expansion valve for heating during the cooling operation. and,
The cooling and heating system for an electric vehicle further includes a cooling check valve installed in the bypass flow path of the expansion valve for heating to block the inflow of refrigerant during the heating operation. The method of claim 2,
In the heating operation, the first operation in which the temperature of the cooling water discharged from the electric component is less than the preset cooling water temperature, the heating load of the vehicle compartment is equal to or greater than the preset heating load, and the temperature of the outside air is equal to or greater than the preset external temperature mod poetry,
The control unit controls the first coolant three-way valve to open the first coolant heat discharge passage and the second coolant three-way valve to block the second coolant heat discharge passage and the third coolant heat discharge passage,
A cooling and heating system for an electric vehicle that allows the cooling water from the electric component to flow into the first internal heat exchanger. The method of claim 2,
In the heating operation, the second operation in which the temperature of the coolant discharged from the electric component is equal to or higher than the preset set coolant temperature, the heating load of the vehicle compartment is equal to or higher than the preset set heating load, and the temperature of the outside air is equal to or higher than the preset set external temperature mod poetry,
The control unit controls the first coolant three-way valve to block the first coolant heat dissipation flow path and the second coolant three-way valve to open the second coolant heat dissipation flow path and block the third coolant heat dissipation flow path,
A cooling and heating system for an electric vehicle that allows coolant from the electric component to flow into the heater core. The method of claim 2,
A third operation in which the heating operation is performed, the temperature of the cooling water discharged from the electric component is equal to or higher than a preset set cooling water temperature, the heating load of the vehicle compartment is equal to or higher than the preset set heating load, and the temperature of the outside air is lower than the preset set external temperature mod poetry,
The control unit,
Both the first cooling water pump and the second cooling water pump are operated,
The first coolant three-way valve blocks the first coolant heat dissipation flow path, the second coolant three-way valve opens the second coolant heat dissipation flow path, and blocks the third coolant heat dissipation flow path, so that the cooling water discharge flow path of the electric component After passing the cooling water from the heater core and the second internal heat exchanger sequentially, it is circulated to the electrical component;
The cooling and heating system for an electric vehicle in which the third coolant three-way valve opens the fourth coolant circulation passage to circulate the coolant that has passed through the first internal heat exchanger to the first internal heat exchanger after passing through the low-temperature radiator. The method of claim 6,
The cooling water radiating passage opening and closing means,
A first coolant three-way valve installed at a point where the first coolant heat radiation passage diverges from the coolant discharge passage of the electrical component;
A second coolant three-way valve installed at a point where the second coolant heat discharge passage and the third coolant heat discharge passage diverge from the coolant discharge passage of the electrical component;
A fourth operation in which the heating operation is performed, the temperature of the cooling water discharged from the electric component is less than the preset cooling water temperature, the heating load of the vehicle compartment is greater than or equal to the preset heating load, and the temperature of the outside air is less than the preset external temperature. mod poetry,
The control unit,
Controlling the first coolant three-way valve to open the first coolant heat dissipation passage and the second coolant three-way valve to block the second coolant heat dissipation passage and the third coolant heat dissipation passage;
The first refrigerant three-way valve opens the first refrigerant condensation passage and controls the second refrigerant condensation passage to be shielded, the second refrigerant three-way valve opens the first refrigerant evaporation passage, and controls the second refrigerant condensation passage to be closed. The refrigerant evaporation path is controlled to be shielded,
The cooling and heating system for an electric vehicle in which the refrigerant discharged from the compressor passes through the condenser and the expansion valve for heating and then passes through the first internal heat exchanger. The method of claim 8,
The cooling water radiating passage opening and closing means,
A first coolant three-way valve installed at a point where the first coolant heat radiation passage diverges from the coolant discharge passage of the electrical component;
A second coolant three-way valve installed at a point where the second coolant heat discharge passage and the third coolant heat discharge passage diverge from the coolant discharge passage of the electrical component;
In the heating operation, the temperature of the cooling water discharged from the electric component is less than the preset cooling water temperature, the heating load of the vehicle compartment is greater than or equal to the preset heating load, and the temperature of the outside air is less than the preset external temperature, In the fifth operation mode set to defrost the external heat exchanger,
The control unit,
Control such that the first coolant three-way valve blocks the first coolant heat dissipation flow path and the second coolant three-way valve opens the second coolant heat dissipation flow path and blocks the third coolant heat dissipation flow path;
Controlling the first refrigerant three-way valve to close the first refrigerant condensation passage and open the second refrigerant condensation passage;
Controlling the second refrigerant three-way valve to block the first refrigerant evaporation passage and open the second refrigerant evaporation passage;
The expansion valve for heating is closed and the check valve for cooling is opened.
A cooling and heating system for an electric vehicle in which the refrigerant discharged from the compressor passes through the first internal heat exchanger and then flows into the external heat exchanger. The method of claim 6,
The cooling water radiating passage opening and closing means,
A first coolant three-way valve installed at a point where the first coolant heat radiation passage diverges from the coolant discharge passage of the electrical component;
A second coolant three-way valve installed at a point where the second coolant heat discharge passage and the third coolant heat discharge passage diverge from the coolant discharge passage of the electrical component;
A sixth operation in which the heating operation is performed, the temperature of the cooling water discharged from the electric component is equal to or higher than the set cooling water temperature, the heating load of the vehicle compartment is less than the preset heating load, and the temperature of the outside air is equal to or higher than the preset set outdoor temperature. mod poetry,
The control unit controls the first coolant three-way valve to open the first coolant heat radiation passage and the second coolant three-way valve to block the second coolant heat radiation passage and the third coolant heat radiation passage,
The first refrigerant three-way valve opens the first refrigerant condensation passage and controls the second refrigerant condensation passage to be shielded, the second refrigerant three-way valve closes the first refrigerant evaporation passage, and controls the second refrigerant condensation passage to be closed. A cooling and heating system for electric vehicles that controls to open the refrigerant evaporation path. The method of claim 2,
A seventh operation in which the heating operation is performed, the temperature of the cooling water discharged from the electric component is greater than or equal to the preset cooling water temperature, the heating load of the vehicle compartment is less than the preset heating load, and the temperature of the outside air is less than the preset external temperature. mod poetry,
The control unit controls the first coolant three-way valve to block the first coolant heat dissipation flow path, the second coolant three-way valve to block the second coolant heat dissipation flow path, and to open the third coolant heat dissipation flow path,
A cooling and heating system for an electric vehicle that allows the cooling water from the electric component to flow into the low-temperature radiator. A compressor for compressing the refrigerant, an external heat exchanger for heat exchange between the refrigerant and outside air, an evaporator for heat exchange of the refrigerant with the air flowing into the cabin during the cooling operation of the cabin, and the air flowing into the cabin during the heating operation of the cabin. A heat pump including a condenser for exchanging heat with the heat pump;
a heater core for heating the vehicle interior by exchanging heat with the air flowing into the vehicle compartment from the cooling water that cooled the electrical components;
a low-temperature radiator for exchanging heat with the outside air to cool the electric component and dissipating the heat of the cooling water to the outside air;
a first internal heat exchanger for evaporating the refrigerant by exchanging heat with the refrigerant before flowing into the compressor;
a second internal heat exchanger for condensing the refrigerant by exchanging heat with the refrigerant discharged from the compressor;
a first cooling water heat dissipation passage branched from the cooling water discharge passage of the electric component and connected to a suction side of the first internal heat exchanger;
a second coolant heat dissipation passage branched off from the coolant discharge passage of the electric component and connected to a suction side of the heater core;
a third coolant heat dissipation passage branched off from the coolant discharge passage of the electric component and connected to a suction side of the low-temperature radiator;
a first refrigerant condensing passage branched from the discharge passage of the compressor and connected to a suction side of the condenser;
a second refrigerant condensing passage branched off from the discharge passage of the compressor and connected to a suction side of the second internal heat exchanger;
a cooling water radiating flow path opening and closing means for selectively opening and closing the first coolant radiating flow path, the second coolant radiating flow path, and the third coolant radiating flow path;
a refrigerant condensation passage opening and closing means for selectively opening and closing the first refrigerant condensation passage and the second refrigerant condensation passage;
A control unit for controlling the operation of the cooling water heat dissipation flow passage opening and closing means and the refrigerant condensation flow passage opening and closing means according to at least one of a temperature of the cooling water discharged from the electric component, a heating load of the vehicle compartment, and the temperature of the outside air;
The cooling water radiating passage opening and closing means,
a first coolant three-way valve installed at a point where the first coolant heat dissipation passage diverges from the coolant discharge passage of the electric component;
A second coolant three-way valve installed at a point where the second coolant heat discharge passage and the third coolant heat discharge passage diverge from the coolant discharge passage of the electrical component;
The refrigerant condensed oil opening and closing means,
A first refrigerant three-way valve installed at a point where the first refrigerant condensation passage and the second refrigerant condensation passage diverge from the discharge passage of the compressor to selectively open and close the first refrigerant condensation passage and the second refrigerant condensation passage. including,
The heat pump,
An expansion valve for heating that expands the refrigerant condensed and discharged from any one of the second internal heat exchanger and the condenser during the heating operation;
A first refrigerant evaporation passage branched from the refrigerant discharge passage of the heating expansion valve and connected to the suction side of the first internal heat exchanger;
a second refrigerant evaporation passage branched from the refrigerant discharge passage of the expansion valve for heating and connected to the external heat exchanger;
Further comprising a refrigerant evaporation passage opening and closing means for selectively opening and closing the first refrigerant evaporation passage and the second refrigerant evaporation passage,
The refrigerant evaporation path opening and closing means,
A second refrigerant three-way valve installed at a point where the first refrigerant evaporation passage and the second refrigerant evaporation passage diverge from the refrigerant discharge passage of the expansion valve for heating;
A seventh operation in which the heating operation is performed, the temperature of the cooling water discharged from the electric component is greater than or equal to the preset cooling water temperature, the heating load of the vehicle compartment is less than the preset heating load, and the temperature of the outside air is less than the preset external temperature. mod poetry,
The control unit controls the first coolant three-way valve to block the first coolant heat dissipation flow path, the second coolant three-way valve to block the second coolant heat dissipation flow path, and to open the third coolant heat dissipation flow path,
allowing the coolant from the electric component to flow into the low-temperature radiator;
Controlling the first refrigerant three-way valve to open the first refrigerant condensation passage and shield the second refrigerant condensation passage;
The cooling and heating system for an electric vehicle controlling the second refrigerant three-way valve to open the first refrigerant evaporation path and to close the second refrigerant evaporation path. delete A compressor for compressing the refrigerant, an external heat exchanger for heat exchange between the refrigerant and outside air, an evaporator for heat exchange of the refrigerant with the air flowing into the cabin during the cooling operation of the cabin, and the air flowing into the cabin during the heating operation of the cabin. A heat pump including a condenser for exchanging heat with the heat pump;
a heater core for heating the vehicle interior by exchanging heat with the air flowing into the vehicle compartment from the cooling water that cooled the electrical components;
a low-temperature radiator for exchanging heat with the outside air to cool the electric component and dissipating the heat of the cooling water to the outside air;
a first internal heat exchanger for evaporating the refrigerant by exchanging heat with the refrigerant before flowing into the compressor;
a second internal heat exchanger for condensing the refrigerant by exchanging heat with the refrigerant discharged from the compressor;
a first cooling water heat dissipation passage branched from the cooling water discharge passage of the electric component and connected to a suction side of the first internal heat exchanger;
a second coolant heat dissipation passage branched off from the coolant discharge passage of the electric component and connected to a suction side of the heater core;
a third coolant heat dissipation passage branched off from the coolant discharge passage of the electric component and connected to a suction side of the low-temperature radiator;
a first refrigerant condensing passage branched from the discharge passage of the compressor and connected to a suction side of the condenser;
a second refrigerant condensing passage branched off from the discharge passage of the compressor and connected to a suction side of the second internal heat exchanger;
a cooling water radiating flow path opening and closing means for selectively opening and closing the first coolant radiating flow path, the second coolant radiating flow path, and the third coolant radiating flow path;
a refrigerant condensation passage opening and closing means for selectively opening and closing the first refrigerant condensation passage and the second refrigerant condensation passage;
A control unit for controlling the operation of the cooling water heat dissipation flow passage opening and closing means and the refrigerant condensation flow passage opening and closing means according to at least one of a temperature of the cooling water discharged from the electric component, a heating load of the vehicle compartment, and the temperature of the outside air;
The cooling water radiating passage opening and closing means,
a first coolant three-way valve installed at a point where the first coolant heat dissipation passage diverges from the coolant discharge passage of the electric component;
A second coolant three-way valve installed at a point where the second coolant heat discharge passage and the third coolant heat discharge passage diverge from the coolant discharge passage of the electrical component;
The refrigerant condensed oil opening and closing means,
A first refrigerant three-way valve installed at a point where the first refrigerant condensation passage and the second refrigerant condensation passage diverge from the discharge passage of the compressor to selectively open and close the first refrigerant condensation passage and the second refrigerant condensation passage. including,
The heat pump,
An expansion valve for heating that expands the refrigerant condensed and discharged from any one of the second internal heat exchanger and the condenser during the heating operation;
A first refrigerant evaporation passage branched from the refrigerant discharge passage of the heating expansion valve and connected to the suction side of the first internal heat exchanger;
a second refrigerant evaporation passage branched from the refrigerant discharge passage of the expansion valve for heating and connected to the external heat exchanger;
Further comprising a refrigerant evaporation passage opening and closing means for selectively opening and closing the first refrigerant evaporation passage and the second refrigerant evaporation passage,
The refrigerant evaporation path opening and closing means,
A second refrigerant three-way valve installed at a point where the first refrigerant evaporation passage and the second refrigerant evaporation passage diverge from the refrigerant discharge passage of the expansion valve for heating;
In the case of the cooling operation,
The control unit controls the first coolant three-way valve to block the first coolant heat dissipation flow path, the second coolant three-way valve to block the second coolant heat dissipation flow path, and to open the third coolant heat dissipation flow path. , allowing the cooling water from the electric component to flow into the low-temperature radiator,
The first refrigerant three-way valve blocks the first refrigerant condensation passage and controls the second refrigerant condensation passage to open, the second refrigerant three-way valve opens the first refrigerant evaporation passage, and controls the second refrigerant condensation passage to open. A cooling and heating system for an electric vehicle in which the refrigerant evaporation path is controlled to be shielded so that the refrigerant from the compressor flows into the second internal heat exchanger.

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