KR20200061460A - Air-conditioning system for electric vehicles - Google Patents

Abstract

The present invention provides a cooling and heating system for an electric vehicle, comprising: a refrigerant circulation line to circulate a refrigerant to a motor-driven compressor, an indoor condenser, a first expansion valve, and an evaporator to selectively heat and cool indoor space of an automobile; a first cooling water circulation line to selectively circulate cooling water to cool a battery; a second cooling water circulation line to selectively circulate cooling water to cool electrical components; a first refrigerant branch line wherein one side thereof branches from an inlet end of the first expansion valve, and the other side thereof is connected to an inlet end of the motor-driven compressor to selectively move a refrigerant; a second expansion valve arranged on the first refrigerant branch line and selectively opened and closed to expand and discharge a refrigerant flowing through the first refrigerant branch line; and a chiller arranged on the first refrigerant branch line behind the second expansion valve to accommodate a refrigerant expanded by the second expansion valve and exchange the heat of the cooling water flowing along the first cooling water circulation line and the second cooling water circulation line with the heat of the refrigerant. The cooling water for a battery is selectively cooled and a heating source can be obtained at the same time to reduce the power consumption of the motor-driven compressor to improve a driving distance. A conventional air-cooling outdoor condenser is eliminated, and a full water-cooling condenser is applied to prevent a high-pressure increase and cooling performance degradation by effective area reduction and liquid refrigerant accumulation of a conventional air-cooling condenser.

Description

Air-conditioning system for electric vehicles

The present invention relates to an air-conditioning system for an electric vehicle, and more specifically, by integrating a battery chiller and a waste heat chiller to drive only the water pump of the battery coolant line to selectively select battery cooling while simultaneously obtaining a heating heat source, conventional air cooling It relates to a heating and cooling system for an electric vehicle that applies a full water-cooled condenser, excluding outdoor condensers.

In general, in electric vehicles, a driving motor for driving a vehicle, a high voltage junction box (HV J/BOX), a motor control unit (MCU) including an inverter, a low voltage DC/DC converter (LDC), etc. Various controllers and electric components such as high voltage parts are heated to cool to prevent and maintain durability, and water cooling using cooling water is usually applied.

In such a water cooling type, heat of cooling water circulated through each electric component is discharged through a radiator (hereinafter, referred to as an electric radiator). The electric vehicle radiator of an electric vehicle is air-cooled like an engine radiator used in a general engine (internal combustion engine) vehicle. It is releasing heat from the coolant.

In the case of an electric vehicle, since the electric parts must be cooled by water cooling instead of the engine, the electric radiator is installed instead of the conventional engine radiator, thereby dissipating heat from the cooling water by passing outside air or driving wind sucked by the cooling fan through the electric radiator. .

Normally, the cooling system of an electric vehicle consists of a cooling water line passing through electric components (VSD100, MCU, LDC, HV J/BOX, Motor), an air-cooled radiator to discharge heat from the cooling water, a cooling water pump, and a cooling fan. At this time, the full-length radiator is placed behind the condenser for the air conditioner.

Air conditioner condenser and electric radiator are arranged in front and rear, and air cooling method is commonly applied, which is cooled by the intake air or running wind of the cooling fan, but the condenser constitutes an independent refrigeration system with an expansion valve, an evaporator, and a compressor, and heats the refrigerant. It is configured to discharge air-cooled, and the electric field radiator serves to cool the cooling water that has been heat-exchanged from various high-voltage electric components.

However, the biggest problem of the conventional cooling module such as an electric radiator and a condenser is that there are limitations due to the limited installation space even if an attempt is made to increase the thickness of the electric radiator in consideration of the heat dissipation performance and capacity of the electric radiator for cooling the electric components. It is a point.

When the thickness of the full-length radiator is increased, the thickness of the condenser must be reduced in a limited installation space, so the cooling performance of the vehicle is disadvantageous due to the reduction of the condenser, and when maintaining the thickness of the condenser, the entire cooling module due to the increase in the thickness of the full-length radiator. As the thickness of increases, it becomes difficult to secure the installation space.

In addition, since the condenser is disposed in front of the full-length radiator, in the full-length radiator, the resistance of the outside air flowing in from the front of the vehicle, that is, the ventilation resistance increases, resulting in a decrease in the cooling performance of the electric components.

As a conventional technique, reference may be made to Patent Publication No. 10-2012-0059730 (2012.06.11).

In addition, when left at a low ambient temperature (-20°C) for a long time, a refrigerant shortage occurred due to the accumulation of liquid refrigerant in the outdoor condenser, and when processing the motor load of the electric vehicle, the cooling module is not required as excessive cooling compared to the internal combustion engine For the purpose of weight reduction and cost reduction, the effective area of the air-cooled condenser is reduced, and the cooling performance is lowered and the high pressure is increased, thereby increasing the power consumption of the compressor.

The present invention integrates the battery chiller and the waste heat chiller to drive only the water pump of the battery coolant line to selectively select the battery cooling and at the same time obtain a heating heat source, thereby reducing the power consumption of the electric compressor to improve the driving distance, and conventional Excluding air-cooled outdoor condensers, full-water-cooled condensers are applied to provide a cooling and cooling system for electric vehicles that can prevent liquid refrigerant accumulation, reduced cooling performance due to reduced effective area, and high-pressure rise by applying a conventional air-cooled condenser. The purpose is to do.

In the heating and cooling system for an electric vehicle using a heat pump according to the present invention, a refrigerant circulation line for circulating refrigerant through an electric compressor, an indoor condenser, a first expansion valve, and an evaporator to selectively heat and cool the vehicle interior, and the battery is cooled A first cooling water circulating line selectively circulating the cooling water, a second cooling water circulating line selectively circulating the cooling water so that the electrical components are cooled, and one side branching from the inlet end of the first expansion valve, and the other side is the electric compressor The first refrigerant branch line is connected to the inlet of the selectively to flow the refrigerant, and is provided on the first refrigerant branch line, the second refrigerant is selectively opened and closed to expand and flow the refrigerant flowing through the first refrigerant branch line An expansion valve and a second expansion valve provided behind the first expansion branch line to accommodate the expanded refrigerant in the second expansion valve, and flowing along the first cooling water circulation line and the second cooling water circulation line, respectively. It includes a chiller that exchanges cooling water with a refrigerant.

At this time, the first cooling water circulation line according to the present invention includes a first water pump forcibly flowing cooling water flowing along the first cooling water circulation line, and a water heating means for heating cooling water flowing along the first cooling water circulation line. It includes.

In addition, the second cooling water circulation line according to the present invention includes a second water pump forcibly flowing cooling water flowing along the second cooling water circulation line.

In addition, the heating and cooling system for an electric vehicle according to the present invention is provided between the indoor condenser and the first expansion valve among the refrigerant circulation lines, and a 2-way valve that opens and closes the refrigerant circulation line between the indoor capacitor and the first expansion valve, One side is branched from the inlet end side of the 2-way valve in the refrigerant circulation line, and the other side is a second refrigerant branch line connected to the outlet end side of the 2-way valve in the refrigerant circulation line, and a battery in the first coolant circulation line One side is branched from the outlet end of the, the other side is branched from the outlet side of the first coolant branch line connected to the inlet end of the battery, and the second coolant circulation line, and the other side is the electronic component. The second cooling water branch line connected to the inlet end of the, and the second refrigerant branch line, the first cooling water branch line and the second cooling water branch line superimposed on the second refrigerant branch line, the first cooling water branch line and It includes a water cooling condenser for selectively heat-exchanging the refrigerant and the cooling water flowing along the second cooling water branch line.

Here, the first cooling water branch line according to the present invention is provided on the first cooling water branch line, a third water pump forcibly flowing cooling water flowing along the first cooling water branch line, and the first cooling water branch line Of the third water pump, one side is connected to the inlet end side of the third water pump, and the other side is connected to the outlet end side of the water cooling condenser, the first cooling water bypass line for flowing the cooling water flowing along the first cooling water branch line, and It is provided on the inlet end side of the water cooling condenser of the first cooling water branch line, and includes a battery radiator for air cooling the cooling water before entering the water cooling condenser.

In addition, the heating and cooling system for an electric vehicle according to the present invention includes an electrical equipment radiator provided on the inlet end of the water cooling condenser among the second cooling water splitter lines to air-cool the cooling water before entering the water cooling condenser.

In addition, the heating and cooling system for an electric vehicle according to the present invention includes an accumulator disposed at the rear of the electric compressor among the refrigerant circulation lines and separating the introduced refrigerant into a liquid phase and a gas phase while only flowing the gas phase refrigerant.

Effects shown by the heating and cooling system for an electric vehicle according to the present invention are as follows.

By integrating the battery chiller and the waste heat chiller, only the water pump of the battery coolant line is driven to selectively heat the battery and at the same time obtain a heating heat source, reducing the power consumption of the electric compressor to improve the driving distance and improve the conventional air-cooled outdoor condenser. Excluding, by applying the full (Full) water-cooled condenser, it is possible to prevent the liquid refrigerant accumulation of the conventional air-cooled condenser, cooling performance reduction and high pressure rise due to reduction of effective area.

1 is an exemplary view showing an air conditioning system for an electric vehicle according to an embodiment of the present invention.
2 is an exemplary view showing a circulation process of a refrigerant in a heating mode of an air conditioning system for an electric vehicle according to an embodiment of the present invention.
3 is an exemplary view showing a circulation process of a refrigerant in a heating dehumidifying mode of an air conditioning system for an electric vehicle according to an embodiment of the present invention.
4 is an exemplary view showing a circulation process of a refrigerant in a heating and battery cooling mode of an air conditioning system for an electric vehicle according to an embodiment of the present invention.
5 is an exemplary view showing a circulation process of a refrigerant in a cooling mode of an air conditioning system for an electric vehicle according to an embodiment of the present invention.
6 is an exemplary view showing a circulating process of a refrigerant in a cooling and battery cooling mode of an air conditioning system for an electric vehicle according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be interpreted as being limited to ordinary or dictionary meanings, and the inventor appropriately explains the concept of terms in order to explain his or her invention in the best way. Based on the principle of being able to be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments shown in the embodiments and drawings described in this specification are only the most preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, and at the time of this application, they can be replaced evenly It should be understood that there may be one variation.

The present invention integrates the battery chiller and the waste heat chiller to drive only the water pump of the battery cooling water line to obtain the heating heat source while cooling the battery, thereby reducing the power consumption of the electric compressor, improving the driving distance, and conventional air-cooled outdoor Except for the condenser, by applying a full (cooled) water-cooled condenser, the air-cooling system for electric vehicles that can prevent liquid refrigerant accumulation, reduced cooling performance due to reduction of effective area and high pressure rise phenomenon of a conventional air-cooled condenser, Referring to the drawings as follows.

1 to 6, the cooling and heating system for an electric vehicle according to an embodiment of the present invention includes a refrigerant circulation line 100, a first cooling water circulation line 200, a second cooling water circulation line 300, and a first refrigerant branch line. (400), a second expansion valve 410 and a chiller 420 are included. First, the refrigerant circulation line (100) uses an electric compressor (110) and an indoor condenser to cool and cool the interior of the vehicle. (120), the first expansion valve 130, circulates to the evaporator (140).

In addition, the first cooling water circulation line 200 selectively circulates cooling water to cool the battery B, and the second cooling water circulation line 300 selectively circulates cooling water so that the electrical equipment PE is cooled.

The refrigerant circulation line 100, the first cooling water circulation line 200, and the second cooling water circulation line 300 with reference to FIG. 1 are as follows.

First, the electric compressor 110 is provided on the refrigerant circulation line 100, and the electric compressor 110 is driven by an externally applied power source according to a driving signal transmitted from a control unit of the air conditioning system and introduced refrigerant. Compress and then spill.

In addition, the indoor condenser 120 heats the supply air by dissipating heat from the supply air provided to the vehicle interior by heat exchange with the air supply provided to the car interior, and the evaporator 140 absorbs heat by the heat exchange with the air supply from which the introduced refrigerant is supplied to the vehicle interior. To cool the air supply.

At this time, the electric compressor 110 and the indoor condenser 120 are connected to each other by a refrigerant circulation line 100, the refrigerant circulation line 100 is connected to the outlet end of the electric compressor 110 and one side, The side is connected to the inlet end of the indoor condenser 120, the refrigerant compressed by the electric compressor 110 flows into the indoor condenser 120.

The refrigerant flowing into the indoor condenser 120 heats the air supply by dissipating heat to the air supply by heat exchange with the air supply provided from the indoor condenser 120 to the car interior, and the heated air supply is provided to the car interior to heat the car interior. This is done.

In addition, the indoor condenser 120 and the evaporator 140 are connected to a refrigerant circulation line 100, wherein the refrigerant circulation line 100 is connected to an outlet end of the indoor condenser 120, and one side is connected to the other side. Connected to the inlet end of the evaporator 140, the refrigerant passing through the indoor condenser 120 flows into the evaporator 140.

At this time, a first expansion valve 130 is provided on the refrigerant circulation line 100, and the first expansion valve 130 receives the refrigerant circulation line 100 according to a signal for each operation mode transmitted from a control unit of an air conditioning system. Selectively open and close, and expand the refrigerant flowing along the refrigerant circulation line 100 (reducing the refrigerant to a pressure at which evaporation occurs due to throttling), so that the expanded refrigerant flows into the evaporator 140.

After being expanded by the first expansion valve 130, the refrigerant flowing into the evaporator 140 absorbs the supply air by heat exchange with the air supply provided from the evaporator 140 to the car interior, thereby cooling the air supply and cooling. The old air supply is provided to the car interior to cool the car interior.

Here, the indoor condenser 120 and the evaporator 140 are provided inside the housing 1 of the air conditioning unit, and a blowing means 2 is provided at the front end of the housing 1 of the air conditioning unit, and the blowing means 2 The evaporator 140 is provided at the rear of the outside air from outside the vehicle or the inside air from the inside of the car as the air supply by driving the blowing means 2 according to the signal for each driving mode sent from the control unit of the air conditioning system. As it is converted, after passing through the evaporator 140, it is blown into the rear automobile interior.

And the rear of the evaporator 140 is divided into a heating passage (3) and a cooling passage (4) by a partition wall, a passage opening and closing door (5) is provided at the front end of the partition wall, the operation mode to be sent out from the control unit of the air conditioning system The heating passage 3 or the cooling passage 4 is selectively opened and closed by rotation of the passage opening/closing door 5 according to the star signal.

At this time, the heating conduit 3 is provided with the indoor condenser 120, and after the supply air flowing along the heating conduit 3 is heated by heat exchange with the indoor condenser 120, it enters the car interior and heats. To be done.

In addition, a PTC 6 is provided at the rear of the indoor condenser 120, and the PTC 6 is selectively driven by an externally applied power source according to a signal for each operation mode transmitted from a control unit of an air conditioning system. Heat is supplied to the air passing through the condenser 120 to add heat, and PTC 6 can compensate for insufficient heat when heating a car in the winter.

In addition, an accumulator 150 is disposed at the rear of the electric compressor 110 among the refrigerant circulation lines 100, and the accumulator 150 separates the introduced refrigerant into a liquid phase and a gas phase and discharges only the gas phase refrigerant, so that the electric compressor (110) so that only the gaseous refrigerant is introduced.

In addition, a two-way valve 101 is provided between the indoor condenser 120 and the first expansion valve 130 among the refrigerant circulation lines 100, and the two-way valve 101 is transmitted from a control unit of an air conditioning system. The refrigerant circulation line 100 between the indoor condenser 120 and the first expansion valve 130 is opened and closed according to the signal for each operation mode.

Here, the heating and cooling system for an electric vehicle according to an embodiment of the present invention includes a first refrigerant branch line 400, wherein the first refrigerant branch line 400 is one side at the inlet end of the first expansion valve 130. This branch, the other side is connected to the inlet end of the electric compressor 110 to selectively flow the refrigerant.

In addition, a second refrigerant branch line 500 is connected to the refrigerant circulation line 100, wherein the second refrigerant branch line 500 is from the inlet end side of the 2-way valve 101 of the refrigerant circulation line 100. One side is branched, the other side is connected to the outlet side of the 2-way valve 101 of the refrigerant circulation line 100, and selectively flows out of the indoor condenser 120 according to the opening and closing of the 2-way valve 101. The cooled refrigerant flows along the second refrigerant branch line 500.

In addition, a second expansion valve 410 is provided on the first refrigerant branch line 400. The second expansion valve 410 is selectively opened and closed according to a signal for each operation mode transmitted from a control unit of an air conditioning system. The refrigerant flowing through the refrigerant branch line 400 is expanded (reduced by decompressing the refrigerant to a pressure at which evaporation occurs due to throttling) and then flows out, and a chiller (at the rear of the second expansion valve 410 of the first refrigerant branch line 400) 420) is provided, the chiller 420 accommodates the refrigerant expanded in the second expansion valve 410, and flows along the first cooling water circulation line 200 and the second cooling water circulation line 300, respectively. The cooling water is exchanged with the refrigerant.

At this time, the first cooling water circulation line 200 selectively circulates cooling water so that the battery B is cooled. The first cooling water circulation line 200 includes a first water pump 210 and a water heating means 220. This is included.

The first water pump 210 on the first cooling water circulation line 200 forcibly flows cooling water flowing along the first cooling water circulation line 200, and the water heating means 220 is the first cooling water The cooling water flowing along the circulation line 200 is heated.

In addition, a first cooling water branch line 600 is connected to the first cooling water circulation line 200. The first cooling water branch line 600 is an outlet end of the battery B among the first cooling water circulation lines 200. One side is branched from the side, and the other side is connected to the inlet end side of the battery (B).

At this time, a three-way valve 230 is provided at the branching point of the first cooling water circulation line 200 where one side of the first cooling water branch line 600 branches, to signal for each operation mode transmitted from the control unit of the cooling and heating system. According to the flow path change of the three-way valve 230, the flow path of the cooling water is opened and closed.

The first cooling water branch line 600 includes a third water pump 610, a first cooling water bypass line 620, and a battery radiator 630, wherein the third water pump 610 is the first cooling water It is provided on the branch line 600, forcibly flows cooling water flowing along the first coolant branch line 600, and the first coolant bypass line 620 is one of the first coolant branch lines 600. One side is connected to the inlet end side of the third water pump 610, and the other side is connected to the outlet end side of the water cooling condenser 510 to flow cooling water flowing along the first cooling water branch line 600, The battery radiator 630 is provided on the inlet end side of the water cooling condenser 510 among the first cooling water splitter lines 600 to air-cool the cooling water before flowing into the water cooling condenser 510.

In addition, the second cooling water circulation line 300 selectively circulates cooling water so that the electrical equipment PE is cooled. The second cooling water circulation line 300 includes a second water pump 310, and the second water The pump 310 forces the cooling water flowing along the second cooling water circulation line 300 to flow.

At this time, a second cooling water distributor line 700 is connected to the second cooling water circulation line 300, and the second cooling water distributor line 700 is one side from the outlet end side of the electrical equipment among the second cooling water circulation lines 300. This branch, the other side is connected to the inlet end side of the electrical equipment (PE), the inlet end side of the water cooling condenser 510 of the second cooling water splitter line 700 is provided with an electrical equipment radiator 710, the water cooling condenser The cooling water before flowing into (510) is air-cooled.

Here, in the second cooling water circulation line 300, a three-way valve 320 is provided at a branching point at which one side of the second cooling water branch line 700 branches, to signal for each operation mode transmitted from the control unit of the cooling/heating system. According to the change of the flow path of the three-way valve 320, the flow path of the cooling water is opened and closed.

And the water cooling condenser 510 is superimposed on the second refrigerant branch line 500, the first cooling water branch line 600 and the second cooling water branch line 700, the second refrigerant branch line 500, The refrigerant and the cooling water that flow respectively along the first coolant branch line 600 and the second coolant branch line 700 are selectively exchanged.

A circulation process of refrigerant and cooling water for each heating mode, heating dehumidification mode, heating and battery cooling mode, cooling mode, cooling and battery cooling mode of the electric vehicle air conditioning system according to an embodiment of the present invention with reference to FIGS. 2 to 6 Looking at as follows.

In the heating mode with reference to FIG. 2, when a heating mode is selected by a signal transmitted from a control unit of a heating/cooling system or a user's selection, a passage opening/closing door 5 provided in the housing 1 of the air conditioning unit is a heating passage (3). ) Is opened, and the cooling passage 4 is controlled to close.

In addition, the second way valve 101 and the second expansion valve 410 are open-controlled, the first expansion valve 130 is closed-controlled, and the cooling water is the second cooling water by driving the second water pump 310. Only the circulation line 300 is controlled to cycle.

Under the control of the valves and water pumps, the refrigerant flows into the electric compressor 110, is compressed, then flows out, and the refrigerant discharged from the electric compressor 110 flows indoors along the refrigerant circulation line 100. Inflow into the 120, the air supply is heated by heat dissipation of the air supply by heat exchange with the air supply provided from the indoor condenser 20 to the car interior, and the heated air supply is provided to the car interior to heat the car interior.

And the refrigerant leaked from the indoor condenser 120 flows along the refrigerant circulation line 100, flows along the first refrigerant branch line 400 through a branch point, and expands by a second expansion valve 410. After the refrigerant is depressurized to the pressure at which evaporation occurs due to throttling, it is introduced into the chiller 420.

In addition, the refrigerant introduced into the chiller 420 is absorbed by heat exchange with cooling water circulating along the second cooling water circulation line 300, and after the refrigerant is heated by the cooling water, in the first refrigerant branch line 400 After joining the refrigerant circulation line 100, it flows into the accumulator 150.

At this time, the cooling water circulating along the second cooling water circulation line 300 is cooled by heat exchange with a refrigerant, and the refrigerant flowing into the accumulator 150 is separated into a liquid phase and a gas phase, and only the gas phase refrigerant flows out, and the outflow gas phase Refrigerant is recirculated through the refrigerant purifying line 100 to the electric compressor 110 to form a circulation process of the refrigerant.

In the heating dehumidifying mode with reference to FIG. 3, when the heating dehumidifying mode is selected by a signal transmitted from a control unit of a heating/cooling system or a user's selection, a passage opening/closing door 5 provided in the housing 1 of the air conditioning unit is a heating passage. (3) is opened and the cooling passage (4) is controlled to close.

In addition, the second way valve 101, the first expansion valve 130, and the second expansion valve 410 are each open-controlled, and the cooling water is driven by the second water pump 310 to drive the second cooling water circulation line ( 300) is controlled to cycle.

Under the control of the valves and water pumps, the refrigerant flows into the electric compressor 110, is compressed, then flows out, and the refrigerant discharged from the electric compressor 110 flows indoors along the refrigerant circulation line 100. Inflow into the 120, the air supply is heated by heat dissipation of the air supply by heat exchange with the air supply provided from the indoor condenser 120 to the car interior, and the heated air supply is provided to the car interior to heat the car interior.

And the refrigerant leaked from the indoor condenser 120 flows along the refrigerant circulation line 100 and flows along the refrigerant circulation line 100 and the first refrigerant branch line 400 through a branch point,

The refrigerant flowing along the refrigerant circulation line 100 is expanded by the second expansion valve 410 (depressurizes the refrigerant to a pressure at which evaporation occurs due to throttling), and then flows into the evaporator 140, While passing through the evaporator 140, moisture is condensed and dehumidified in the air supply provided to the vehicle interior.

The refrigerant leaked from the evaporator 140 flows into the accumulator 150 through the refrigerant purification line 100.

In addition, the refrigerant branching from the refrigerant circulation line 100 and flowing along the first refrigerant branch line 400 expands by the second expansion valve 410 (decompresses the refrigerant to a pressure at which evaporation occurs due to throttling action). ), and then flows into the chiller 420.

And the refrigerant introduced into the chiller 420 is absorbed by heat exchange with the cooling water circulating along the second cooling water circulation line 300, the refrigerant is heated by the cooling water, and then joined to the refrigerant circulation line 100 It flows into the accumulator 150.

At this time, the cooling water circulating along the second cooling water circulation line 300 is cooled by heat exchange with a refrigerant, and the refrigerant flowing into the accumulator 150 is separated into a liquid phase and a gas phase, and only the gas phase refrigerant flows out, and the outflow gas phase Refrigerant is recirculated through the refrigerant purifying line 100 to the electric compressor 110 to form a circulation process of the refrigerant.

In the heating battery cooling mode with reference to FIG. 4, when the heating battery cooling mode is selected by a signal transmitted from a control unit of a heating/cooling system or a user's selection, a passage opening/closing door 5 provided in the housing 1 of the air conditioning unit The heating passage 3 is controlled to open, and the cooling passage 4 is controlled to close.

In addition, the second way valve 101 and the second expansion valve 410 are open-controlled, the first expansion valve 130 is closed-controlled, and the cooling water includes a first water pump 210 and a second water pump ( It is controlled to circulate along the first cooling water circulation line 200 and the second cooling water circulation line 300 by driving 310.

Under the control of the valves and water pumps, the refrigerant flows into the electric compressor 110, is compressed, then flows out, and the refrigerant discharged from the electric compressor 110 flows indoors along the refrigerant circulation line 100. Inflow into the 120, the air supply is heated by heat dissipation of the air supply by heat exchange with the air supply provided from the indoor condenser 120 to the car interior, and the heated air supply is provided to the car interior to heat the car interior.

And the refrigerant leaked from the indoor condenser 120 flows along the refrigerant circulation line 100, flows along the first refrigerant branch line 400 through a branch point, and expands by a second expansion valve 410. After the refrigerant is depressurized to the pressure at which evaporation occurs due to throttling, it is introduced into the chiller 420.

At this time, the refrigerant introduced into the chiller 420 is absorbed by heat exchange with cooling water circulating along the first cooling water circulation line 200 to cool the cooling water and cool the cooling water for the battery, and the chiller 420 ), the refrigerant flowing into the refrigerant circulation line 100 from the first refrigerant branch line 400 and then flows into the accumulator 150.

In addition, the cooling water circulating along the first cooling water circulation line 200 and the second cooling water circulation line 300 is cooled by heat exchange with a refrigerant, and the refrigerant flowing into the accumulator 150 is separated into a liquid phase and a gas phase. Only the gaseous refrigerant flows out, and the gaseous refrigerant that flows out forms a circulation process of the refrigerant that is re-introduced to the electric compressor 110 through the refrigerant purification line 100.

In the cooling mode with reference to FIG. 5, when a cooling mode is selected by a signal transmitted from a control unit of a heating/cooling system or a user's selection, a passage opening/closing door 5 provided in the housing 1 of the air conditioning unit is a heating passage 3 ) Is closed, and the cooling passage 4 is controlled to open.

And the second way valve 101 and the second expansion valve 410 is closed control, the first expansion valve 130 is open control, the cooling water is the second water pump 310 and the third water pump ( By driving 610, the first cooling water branch line 600, the first cooling water bypass line 620, and the second cooling water branch line 700 are controlled to cycle respectively.

Here, the three-way valve 230 of the first cooling water circulation line 200 is closed and controlled so that the cooling water for the battery circulates along the first cooling water branch line 600 and the first cooling water bypass line 620, and the second cooling water The three-way valve 320 of the circulation line 300 is controlled to change the flow path so that the cooling water circulates along the second cooling water branch line 700.

Under the control of the valves and water pumps, the refrigerant flows into the electric compressor 110, is compressed, then flows out, and the refrigerant discharged from the electric compressor 110 flows indoors along the refrigerant circulation line 100. It is introduced into the (120), and at this time, it flows out without heat exchange of the supply air flowing into the indoor condenser (20).

And the refrigerant leaked from the indoor condenser 120 flows along the refrigerant circulation line 100, flows along the second refrigerant branch line 500 through a branch point, and expands by the first expansion valve 130. After the refrigerant is depressurized to the pressure at which evaporation occurs due to throttling action, it is introduced into the evaporator 140.

At this time, the cooling water is circulated along the first cooling water branch line 600 and the second cooling water branch line 700 by the second water pump 310 and the third water pump 610, where the first cooling water branch After being air-cooled by the battery radiator 630 and the electrical equipment radiator 710 disposed on each of the line 600 and the second cooling water branch line 700, the second refrigerant branch line 500 and the first cooling water branch In the water cooling condenser 510 overlapping the line 600 and the second cooling water branch line 700, the refrigerant is dissipated by heat exchange with the refrigerant to cool the refrigerant.

And after cooling in the water cooling condenser 510, the refrigerant flowing into the evaporator 140 absorbs the air supply by heat exchange with the air supply provided from the evaporator 140 to the car interior, thereby cooling the air supply and cooling the air supply. It is provided as a vehicle interior, and cooling of the vehicle interior is achieved.

And the refrigerant leaked from the evaporator 30 flows into the accumulator 150 through the refrigerant circulation line 100.

As the refrigerant introduced into the accumulator 150 is separated into a liquid phase and a gas phase, only the gas phase refrigerant flows out, and the circulating process of the refrigerant in which the gas phase refrigerant flows back into the electric compressor 110 through the refrigerant purification line 100. Achieves.

In the cooling battery cooling mode with reference to FIG. 6, when the cooling battery cooling mode is selected by a signal transmitted from a control unit of a heating/cooling system or a user's selection, a passage opening/closing door 5 provided in the housing 1 of the air conditioning unit is provided. The heating passage 3 is closed, and the cooling passage 4 is controlled to open.

And the second way valve 101 is closed control, the second expansion valve 410 is open control, the cooling water is the first water pump 210, the second water pump 310 and the third water pump ( It is controlled to cycle along the first cooling water circulation line 200, the first cooling water branch line 600 and the first cooling water bypass line 620, and the second cooling water branch line 700 by driving 610). .

Here, the three-way valve 230 of the first cooling water circulation line 200 circulates along the first cooling water circulation line 200, the first cooling water branch line 600, and the first cooling water bypass line 620, respectively. The flow path is controlled, and the three-way valve 320 of the second cooling water circulation line 300 controls the flow path by changing the cooling water circulation to the second cooling water branch line 700.

Under the control of the valves and water pumps, the refrigerant flows into the electric compressor 110, is compressed, then flows out, and the refrigerant discharged from the electric compressor 110 flows indoors along the refrigerant circulation line 100. It is introduced into the (120), and at this time, it flows out without heat exchange of the supply air flowing into the indoor condenser (20).

And the refrigerant leaked from the indoor condenser 120 flows along the refrigerant circulation line 100, flows along the second refrigerant branch line 500 through a branch point, and expands by the first expansion valve 130. After the refrigerant is depressurized to the pressure at which evaporation occurs due to throttling action, it is introduced into the evaporator 140.

At this time, the cooling water is circulated along the first cooling water branch line 600 and the second cooling water branch line 700 by the second water pump 310 and the third water pump 610, where the first cooling water branch After being air-cooled by the battery radiator 630 and the electrical appliance radiator 710 disposed on each of the line 600 and the second cooling water branch line 700, the second refrigerant branch line 500 and the first cooling water branch In the water cooling condenser 510 overlapping the line 600 and the second cooling water separator line 700, the refrigerant is dissipated by heat exchange with the refrigerant to cool the refrigerant.

And after cooling in the water cooling condenser 510, the refrigerant flowing into the evaporator 140 absorbs the air supply by heat exchange with the air supply provided from the evaporator 140 to the car interior, thereby cooling the air supply and cooling the air supply. It is provided as a vehicle interior, and cooling of the vehicle interior is achieved.

And the refrigerant leaked from the evaporator 30 flows into the accumulator 150 through the refrigerant circulation line 100.

In addition, the refrigerant leaked from the indoor condenser 120 flows along the refrigerant circulation line 100, flows along the first refrigerant branch line 400 through a branch point, and is driven by a second expansion valve 410. After expansion (reducing the refrigerant to a pressure at which evaporation occurs due to throttling), it is introduced into the chiller 420.

At this time, the refrigerant introduced into the chiller 420 is absorbed by heat exchange with cooling water circulating along the first cooling water circulation line 200 to cool the cooling water and cool the cooling water for the battery, and the chiller 420 ), the refrigerant flowed out from the first refrigerant branch line 400 to the refrigerant circulation line 100, and then flows into the accumulator 150.

As the refrigerant introduced into the accumulator 150 is separated into a liquid phase and a gas phase, only the gas phase refrigerant flows out, and the circulating process of the refrigerant in which the gas phase refrigerant flows back into the electric compressor 110 through the refrigerant purification line 100. Achieves.

Therefore, the heating and cooling system for an electric vehicle according to an embodiment of the present invention integrates a battery chiller and a waste heat chiller to drive only the water pump of the battery coolant line to selectively select battery cooling and at the same time obtain a heating heat source, thereby consuming the electric compressor. Reduces power, improves driving distance, excludes conventional air-cooled outdoor condensers, and is applied as a full-water-cooled condenser, reducing liquid refrigerant of conventional air-cooled condensers, decreasing cooling performance due to reduction of effective area, and increasing high pressure. Can be prevented.

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

1: Housing of air conditioning unit
2: Blowing means
3: Heating passage
4: Cooling passage
5: Passage opening and closing door
6: PTC
100: refrigerant circulation line
101: 2-way valve
110: electric compressor
120: indoor condenser
130: first expansion valve
140: evaporator
150: accumulator
200: 1st cooling water circulation line
210: first water pump
220: water heating means
230: 3-way valve
300: second cooling water circulation line
310: second water pump
320: 3-way valve
400: 1st refrigerant branch line
410: second expansion valve
420: chiller
500: 2nd refrigerant branch line
510: water cooling condenser
600: 1st cooling water branch line
610: 3rd water pump
620: 1st cooling water bypass line
630: battery radiator
700: 2nd cooling water branch line
710: electrical equipment radiator
B: battery
PE: electrical equipment

Claims (12)

A refrigerant circulation line that circulates refrigerant through an electric compressor, an indoor condenser, a first expansion valve, and an evaporator so that heating and cooling of the vehicle interior are selectively performed;
A first cooling water circulation line that selectively circulates cooling water to cool the battery;
A second cooling water circulation line that selectively circulates cooling water to cool the electrical components;
A first refrigerant branch line in which one side is branched from the inlet end of the first expansion valve, and the other side is connected to the inlet end of the electric compressor to selectively flow refrigerant;
A second expansion valve provided on the first refrigerant branch line and selectively opened and closed to expand and discharge the refrigerant flowing through the first refrigerant branch line;
Among the first refrigerant branch lines, provided at the rear of the second expansion valve, accommodates the refrigerant expanded in the second expansion valve, and coolant flowing through the first cooling water circulation line and the second cooling water circulation line respectively. A cooling and heating system for an electric vehicle including a chiller for heat exchange.
The method according to claim 1,
In the first cooling water circulation line
A first water pump forcibly flowing cooling water flowing along the first cooling water circulation line;
An air conditioning and heating system for an electric vehicle including a water heating means for heating cooling water flowing along the first cooling water circulation line.
The method according to claim 2,
In the second cooling water circulation line
And a second water pump forcibly flowing cooling water flowing along the second cooling water circulation line.
The method according to claim 3,
A two-way valve provided between the indoor condenser and the first expansion valve among the refrigerant circulation lines to open and close the refrigerant circulation line between the indoor capacitor and the first expansion valve;
A second refrigerant branch line branched from one side of the inlet end of the 2-way valve in the refrigerant circulation line, and the other side connected to an outlet end side of the 2-way valve in the refrigerant circulation line;
A first cooling water branch line in which one side is branched from the outlet end side of the battery among the first cooling water circulation lines, and the other side is connected to the inlet end side of the battery;
Of the second cooling water circulation line, one side is branched from the outlet end side of the electrical equipment, and the other side is a second cooling water branch line connected to the inlet end side of the electrical equipment;
The second refrigerant branch line, the first cooling water branch line and the second cooling water branch line are superimposed on the second refrigerant branch line, the first cooling water branch line and the second cooling water branch line, respectively. Water cooling condenser to selectively heat exchange; Air conditioning system for an electric vehicle comprising a.
The method according to claim 4,
The first cooling water branch line
A third water pump provided on the first cooling water branch line and forcibly flowing cooling water flowing along the first cooling water branch line;
One side of the first cooling water branch line is connected to the inlet end side of the third water pump, the other side is connected to the outlet end side of the water cooling condenser, and the first cooling water flowing the cooling water flowing along the first cooling water branch line A bypass line;
And a battery radiator provided on the inlet end side of the water cooling condenser among the first cooling water branch lines to air-cool the cooling water before entering the water cooling condenser.
The method according to claim 5,
And an electrical equipment radiator provided on the inlet end side of the water cooling condenser among the second cooling water branch lines to air-cool the cooling water before entering the water condensing condenser.
The method according to claim 6,
And an accumulator disposed at the rear of the electric compressor in the refrigerant circulation line and separating the introduced refrigerant into a liquid phase and a gas phase to discharge only the gas phase refrigerant.
The method according to claim 5,
When operating in heating mode,
The second way valve and the second expansion valve are open-controlled, the first expansion valve is closed-controlled, and the cooling and cooling system for an electric vehicle is controlled by circulating the cooling water only through the second cooling water circulation line by driving the second water pump.
The method according to claim 5,
When operating the heating dehumidification mode,
The second way valve, the first expansion valve and the second expansion valve are each open-controlled, and the cooling/cooling system for an electric vehicle is controlled to circulate only the cooling water second cooling water circulation line by driving the second water pump.
The method according to claim 5,
When operating the heating battery cooling mode,
The second way valve and the second expansion valve are open-controlled, the first expansion valve is closed-controlled, and cooling water is driven by the first water pump and the second water pump to drive the first cooling water circulation line and the second cooling water circulation line. 3 flow valves of the first cooling water circulation line are closed and controlled so that the cooling water for the battery is controlled to circulate along the first cooling water branch line and the first cooling water bypass line, and the 3 way of the second cooling water circulation line The valve is a cooling and cooling system for an electric vehicle in which cooling water is circulated along the second cooling water branch line.
The method according to claim 5,
When operating in cooling mode,
The second way valve and the second expansion valve are closed-controlled, the first expansion valve is open-controlled, and the first and second cooling water bypass lines and the first cooling water bypass line are driven by the driving of the second and third water pumps. , Respectively circulating along the second cooling water branch line, the three-way valve of the first cooling water circulation line is closed and controlled so that the cooling water for the battery is controlled to circulate along the first cooling water branch line and the first cooling water bypass line, and the second The three-way valve of the cooling water circulation line is an air conditioning and heating system for an electric vehicle in which cooling water is circulated along the second cooling water branch line.
The method according to claim 5,
Cooling Battery In cooling mode operation,
The second way valve is closed-controlled, the second expansion valve is open-controlled, and the first coolant circulation line and the first coolant branch are cooled by driving the first water pump, the second water pump, and the third water pump. The line and the first coolant bypass line and the second coolant branch line circulate respectively, and the three-way valves of the first coolant circulation line have a first coolant circulation line and a first coolant branch line and a first coolant bypass line. Each is controlled to circulate, and the 3-way valve of the second cooling water circulation line is a second cooling water branch line.

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